PVI Industries Water Heater PV500 12 User Manual

INSTALLATION & MAINTENANCE MANUAL  
TURBOPOWER® 99 GAS WATER HEATER  
MODELS: (742, 1485, 2228, 2971) N, P, L, SS (330, 425, 600, 950, 1200) A-TP  
Installation and service must be performed by a qualified service installer, service agency or the gas supplier.  
IMPORTANT: THIS MANUAL CONTAINS INFORMATION REQUIRED FOR INSTALLATION, OPERATION AND  
MAINTENANCE OF THIS EQUIPMENT. READ AND FOLLOW THE INFORMATION IN THIS MANUAL AND ALL OTHER  
PROVIDED INSTRUCTIONS, LABELS AND MARKINGS BEFORE INSTALLING, OPERATING OR SERVICING THIS UNIT.  
TO THE INSTALLER: After installation, these instructions must be given to the equipment user or left near the appliance.  
SPECIAL INSTRUCTIONS TO THE OWNER: Retain this manual for future reference. These instructions contain important  
information that will help you in maintaining and operating this appliance.  
PVI INDUSTRIES, LLC - Fort Worth, Texas 76111 - www.pvi.com - Phone 1-800-433-5654  
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1
SAFETY CONSIDERATIONS  
WARNING: If the information in the supplied manual(s) is not followed exactly, a fire, explosion or exposure to  
hazardous materials may result, causing property damage, personal injury or loss of life.  
FOR YOUR SAFETY  
Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.  
WHAT TO DO IF YOU SMELL GAS  
Do not try to light any appliance.  
Do not touch any electric switch; do not use any phone in your building.  
Immediately call your gas supplier from a location away from your building and the smell of gas. Follow the gas  
supplier's instructions.  
If you cannot reach your gas supplier, call the fire department.  
Installation and service must be performed by a qualified installer, service agency or the gas supplier.  
This product contains, or may come to contain materials that have been identified as carcinogenic, or possibly carcinogenic  
to humans. Before installing, servicing or removing this product, read and follow the supplied instructions  
WARNING: Installation and service must be performed by a qualified installer, service agency or the gas supplier,  
who must read and follow the supplied instructions before installing, servicing or removing this appliance. Refer to  
the information contained in this manual. Improper installation, adjustment, alteration, service or maintenance can  
cause property damage, personal injury, exposure to hazardous materials or loss of life.  
WARNING: Do not use this appliance if any part has been under water. Immediately call a qualified service  
technician to inspect the unit and to replace any part of the control system, all gas controls and all other items  
affecting safe appliance operation and which has been under water.  
WARNING: In an emergency shut the main gas supply valve to the appliance from a location safely away from the  
emergency. Failure to follow these instructions can cause property damage, personal injury, and exposure to  
hazardous materials or loss of life.  
PRODUCT SAFETY INFORMATION  
REFRACTORY CERAMIC FIBER PRODUCT WITH CRYSTALLINE SILICA  
WARNING: This product contains or may come to contain crystalline silica, which has been identified by the  
International Agency for Research on Cancer (IARC) as carcinogenic to humans. This product also contains  
refractory ceramic fibers, which have been identified by the IARC as possibly carcinogenic to humans. Avoid  
breathing fiber particulates and dust.  
RISKS:  
Air borne fibrous insulation is a possible cancer hazard by inhalation.  
Airborne crystalline silica may cause silicosis (lung disease) by inhalation.  
May cause temporary irritation to eyes, skin, and respiratory tract.  
PRECAUTIONARY MEASURES:  
Minimize airborne fibers with engineering controls.  
Use NIOSH/MSHA approved respirators as required (see MSDS).  
Wear long sleeved, loose-fitting clothing, eye protection and gloves.  
FIRST AID MEASURES: (If any of the irritations listed persists, seek medical attention)  
Eyes:  
Skin:  
Flush with water.  
Wash with soap and warm water.  
Ingestion: Do not induce vomiting. Get medical attention if gastrointestinal symptoms develop.  
Inhalation: Remove to fresh clean air.  
WARNING: If you are unfamiliar with the safe handling of refractory ceramic fiber products, or if you wish additional  
information prior to beginning any disassembly of the water heater or boiler that might expose refractory ceramic  
fiber materials, contact: Unifrax Corporation, 2351 Whirlpool Street, Niagara Falls, NY 14305-2413, 1-800-322-2293.  
IDENTIFICATION OF REFRACTORY CERAMIC FIBER MATERIALS (RCF):  
The burner, lower tank and upper and lower flue collector assemblies utilize RCF material. (The RFC materials are located  
within the product and not generally exposed except during service, disassembly or assembly.)  
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IMPORTANT SAFETY NOTE  
It takes only 5 seconds of skin contact with 140°F water to cause a  
second degree burn! You must protect against high water temperatures at all  
lavatories, tubs, showers and other points of hot water contact.  
Accidental scalding from high water temperatures is a greater  
risk in some types of installations. Some examples are:  
HOMES FOR THE MENTALLY HANDICAPPED  
HOMES FOR THE PHYSICALLY HANDICAPPED  
HOSPITALS AND NURSING HOMES  
ELDER CARE FACILITIES AND REST HOMES  
ORPHANAGES AND CHILD CARE FACILITIES  
OTHER INSTALLATIONS - WHERE RESPONSE TO CONTACT WITH HOT WATER  
MAY BE SLOWER OR WHERE THE DANGER OF HOT WATER CONTACT IS GREATER  
Thermostatically controlled mixing valves  
must be used in the design of the potable hot water system.  
Potable hot water should be tempered to no more than 110°F  
when used for bathing or other personal uses.  
Good engineering practice mandates the use of thermostatically  
controlled mixing valves set at 120°F or less to keep the delivered water  
temperature below scalding temperatures.  
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PRODUCT DESCRIPTION  
1. Flue stack *  
9. Burner  
2. Fixed temperature high limit device  
3. Adjustable temperature limit device  
10. Upper flue collector  
11. Lower flue collector  
4. Digital operating temperature control  
5. Control switch(s) and fuse(s)  
6. Gas valve  
12. Rear module access (optional on some models)  
13. Condensate neutralization system  
14. Condensate drain (must be plumbed to floor drain) *  
7. Gas inlet  
8. Drip leg  
(* Not furnished by PVI)  
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STANDARD FEATURES AND EQUIPMENT  
3.1 Warranty  
Factory warranty does not cover improper installation or operation. (See warranty for complete details).  
Warranty exclusions include but are not limited to failure or malfunctions resulting from:  
1. Failures to properly apply, install, operate, or maintain the appliance in accordance to printed instructions.  
2. Abuse, alteration, accident, fire, flood and the like.  
3. Sediment or lime buildup, freezing or any other conditions causing inadequate circulation.  
4. Corrosive or contaminated atmosphere.  
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WATER HEATER INSTALLATION  
4.1 Checking Equipment Before You Install  
Inspect the unit completely upon receipt from the freight carrier before signing the bill of lading. Inspect the  
appliance and all accompanying parts for signs of impact or mishandling. Verify the total number of pieces shown  
on packing slips with those actually received. Contact the freight carrier immediately if any damage or shortage is  
detected.  
4.2 Codes  
The equipment shall be installed in accordance with those installation regulations in force in the local area where  
the installation is to be made. These shall be carefully followed in all cases. Authorities having jurisdiction shall be  
consulted before installation is made. In the absence of such requirements, the installation shall conform to the  
latest edition of the National Fuel Gas Code, ANSI Z223.1. Where required by the authority having jurisdiction,  
the installation must conform to American Society of Mechanical Engineers Safety Code for Controls and Safety  
Devices for Automatically Fired Boilers, No. (CSD-1). All appliances conform to the applicable sections of the  
latest edition of ASME Boiler and Pressure Vessel Code, Section IV. Where required by the Canadian authority  
having jurisdiction, the installation must comply with CAN/CSA B149 and/or B149.2 and/or provincial regulations.  
4.3 Electrical Requirements  
WARNING: Turn off all electrical service to the appliance when accessing the controls located inside the  
control cabinet. The cabinet contains high voltage wiring and terminals. If the electrical service is not  
turned off and these wires or terminals are touched, a dangerous shock causing personal injury or loss of  
life could occur. Close the control cabinet before restoring electrical service to the appliance.  
See product specification sheets and/or appliance labeling for branch service requirements. The appliance, when  
installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or  
in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/NFPA No. 70.  
When the unit is installed in Canada, it must conform to the CSA C22.1, Canadian Electrical Code, Part 1 and/or  
Local Electrical Codes.  
1. All wiring between the unit and field installed devices must be made with type T wire.  
2. Line voltage wire exterior to the appliance must be enclosed in approved conduit or approved metal clad  
cable.  
3. To avoid serious damage, DO NOT energize the unit until the system and appliance is full of water.  
4.4 Location  
These units are suitable for indoor installation only.  
1. Locate the unit so that if water connections should leak, water damage will not occur. When such locations  
are unavoidable, install a suitable drain pan, and plumb pan to ensure adequate drainage in the event of a  
leak. Under no circumstances is the manufacturer responsible for water damage in connection with this unit,  
or any of its components. The manufacturer’s warranty does not cover water damage.  
2. Protect associated electrical components and electrical connections from water (dripping, spraying, rain, etc.)  
during appliance operation and service.  
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3. Place the appliance on a level, non-combustible floor. Concrete over wood is not considered non-  
combustible.  
4. Do not install on carpet or other combustible floor coverings.  
5. Installation over a combustible floor: Units installed over a combustible floor MUST be provided with a base  
of hollow clay tile or concrete blocks from 8" to 12" thick and extending 24" beyond the sides. Place the blocks  
in line so that the holes line up horizontally to provide a clear passage through the blocks. Install 1/2” fireproof  
millboard with a 20-gage sheet metal cover over the block base. Center the unit on the base. Also follow this  
procedure if electrical conduit runs through the floor, and beneath the appliance. A field-installed base must  
meet all local fire and safety code requirements.  
4.5 Installation  
WARNING: Use industry standard safe rigging methods when attempting to lift or move this product.  
Failure to follow these instructions could result in property damage, serious injury or death. One common  
method includes the use of straps and spreader bars, lifting from the water heater base skid assembly.  
1. Check the data decal on the appliance. Be sure the electrical, water, oil, or gas supply is adequate for the  
installation.  
2. Carefully remove all shipping supports and bracing.  
3. Use only non-ferrous water piping and fittings. Do not use galvanized pipe or fittings. Use of ferrous or  
galvanized pipe or fittings can cause rust to form.  
4. Install shut-off valves and unions on the inlet and outlet water piping for servicing. Use caution when  
threading pipe nipples into tank connections to prevent cross threading, or over-tightening. Always use a  
back-up wrench on tank nipples when tightening unions, valves, etc.  
5. Insulate hot water and return circulation lines. Insulate cold water supply lines if subject to freezing during  
shutdown periods. IMPORTANT: Do not use the plumbing connected to the appliance as a ground for  
welding or any other purpose.  
6. Pipe the drain valve to a suitable open drain.  
4.6 Service Clearances  
Allow sufficient space to provide adequate clearances on all sides for service and inspection. Recommended  
clearance is 24” at the top and front, 18” at left and right sides of the appliance. Optional equipment may increase  
the clearance requirements. Allow sufficient space for installing and servicing connections such as water, gas,  
vent, combustion air, electrical, pump and other auxiliary equipment.  
4.7 Clearances to Combustible Surfaces  
The appliance must not be installed on a combustible floor, on carpet, on other combustible floor coverings or on  
a non-combustible floor covering combustible material. The minimum clearance to unprotected combustible  
material is 6” from the front, top, left and right sides of the burner and flue collector. Combustible materials are  
allowed to contact the tank sides and top, however service clearances are recommended.  
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CONDENSATION NEUTRALIZATION AND DISPOSAL  
The TURBOPOWER® 99 condensing water heater will produce significant amounts of condensate because of its  
high efficiency. Condensate occurs naturally when water vapor in combustion gases is cooled below the dew  
point. Although only slightly acidic, the condensate is routed through a condensate neutralization system to  
become lower the pH, allowing for disposal into a drain or sewer system.  
The supplied condensate neutralization system contains a crushed limestone neutralization bath. Condensate  
slowly flows through a crushed limestone bed and is neutralized, thus avoiding chemical treatment or dilution  
using substantial quantities of tap water. Over time the limestone is consumed by this process and must be  
replaced. Periodically test the condensate with a pH meter or pH paper and if lower than 5, the crushed limestone  
must be replaced. If no condensate is observed, the main pipe containing the crushed limestone should be  
inspected for blockage.  
If the heater is not installed on a housekeeping pad to ensure gravity drainage, a means of removing condensate,  
such as a pump, will be required. The neutralization bath and condensate trap are filled with condensate (water),  
even when the heater is not running. Therefore, protection must be provided to the neutralization bath, the  
condensate trap and to the condensate drain path, so that condensate does not freeze and damage parts or  
block condensate flow.  
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COMBUSTION AND VENTILATION AIR  
Provisions for adequate combustion and ventilation air to the mechanical room must be in accordance with the  
“Air for Combustion and Ventilation” section in the latest edition of the National Fuel Gas Code, ANSI Z223.1  
and/or CAN/CSA B149, Installation Codes or applicable provisions of the local building codes.  
Equipment located in confined spaces requires two openings installed within 12” (300 m) from the top and bottom  
of the room to assure adequate combustion air and proper ventilation. The total input of all gas utilization  
equipment installed in the room must be used to determine the required minimum air volume needed for  
combustion, ventilation and dilution of flue gasses.  
1. All Air From Outdoors:  
a. Each opening requires a minimum free area of 1 square inch per 4000 Btu/hr input if directly  
communicating with the outdoors or communicating to the outdoors through vertical ducts.  
b. Each opening requires a minimum free area of 1 square inch per 2000 Btu/hr input if communicating  
with the outdoors through horizontal ducts.  
2. All Air From Inside The Building:  
Each opening requires a minimum free area of 1 square inch per 1000 Btu/hr input, but not less than 100  
square inches (0.06 m2).  
3. Combination Of Air From The Indoors And From The Outdoors:  
Refer to National Fuel Gas Code, ANSI Z223.1 and/or CAN/CSA B149, Installation Codes or applicable  
provisions of the local building codes.  
NOTE: This unit may be installed with an optional remote air intake system which uses a make-up air duct to  
draw combustion air directly from outdoors. (See Vertical and Horizontal Remote Air Section.)  
WARNING: Adequate clean combustion air must be provided to the appliance. Under no circumstances  
should the appliance ever be under a negative pressure. Particular care should be taken when exhaust  
fans, compressors, air handling units, etc. may rob air from the appliance. The combustion air supply  
must be completely free of any chemical or fumes, which may be corrosive to the appliance. Some  
common chemical fumes to avoid are fluorocarbons and other halogenated compounds, most commonly  
present as refrigerants or solvents, such as Freon, trichloroethylene, perchlorethylene, chlorine, etc.  
These chemicals, when in contact with the equipment or when burned, form acids which quickly attack  
the tubes, flue collector, stack and other appliance and auxiliary equipment. The result of inadequate  
clean combustion air or negative pressure can be premature unwarranted product failure or unsafe  
operation producing carbon monoxide that could escape into the building. Exposure to carbon monoxide  
can lead to injury or death.  
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VERTICAL AND HORIZONTAL REMOTE AIR  
7.1 Vertical or Horizontal Remote Air Option  
The vertical or horizontal remote air system requires a factory or site installed remote combustion air inlet option  
package. If your water heater does not include this optional equipment, contact your PVI sales representative to  
purchase the Remote Air Kit. The air inlet termination cap supplied with combustion air inlet option must be  
installed. Do not fabricate this from locally available parts as it may cause unsafe operation. Combustion air  
supplied from outdoors must be free of contaminants.  
7.2 Remote Air Piping Design  
The water heater can obtain remote air either vertically, through a ceiling or roof, or horizontally through a wall.  
Locally obtained solid PVC pipe must be attached to the remote air inlet. Larger solid PVC pipe may be  
substituted; however a PVC increaser must be used.  
When the remote combustion air inlet and flue gas outlet are located on the same roof top surface, the cap must  
terminate at least 3 feet lower than the flue gas outlet, if located within a 10 foot radius.  
Locate the remote combustion air inlet and the flue gas vent outlet in a wall or roof with similar wind pressure.  
Install the inlet cap at least one foot above the rooftop or at least 18" above grade and at least one foot above  
normal snow levels.  
WARNING: Locate the termination of the combustion air inlet outdoors to minimize flue gas recirculation  
and to minimize the opportunity for products of combustion to enter the building. Recirculation of flue  
gas (products of combustion drawn from the flue gas outlet into the combustion air inlet) can cause  
operational problems, premature unwarranted product failure or unsafe operation producing carbon  
monoxide. Exposure to carbon monoxide can result in property damage, personal injury or death.  
7.3 Maximum Allowed Combustion Air Vent Length (Equivalent Length)  
Water  
Heater  
Prefix  
742  
1485  
2228  
2971  
W/Remote  
Air  
100 equivalent  
225 equivalent  
feet, vent  
diameter:  
10”  
Input, Btu/h  
feet, vent  
diameter:  
Input, Btu/h  
500,000  
950,000  
1,500,000  
1,850,000  
500,000  
999,000  
1,500,000  
1,950,000  
6”  
6”  
8”  
8”  
10”  
12”  
12”  
VENT PIPE FITTINGS EQUIVALENT (in feet)  
90º Elbow  
90º Long Radius Elbow  
45º Elbow  
14 feet  
12 feet  
6 feet  
For maxim allowed remote air lengths (equivalent length) longer than those shown above, contact the factory.  
7.4 Remote Air Piping of Multiple Units  
Each unit must have a dedicated remote combustion air duct. Combining multiple-unit combustion air ducts into a  
common duct or breeching is not allowed.  
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VENTING PRODUCTS OF COMBUSTION  
The TURBOPOWER® 99 is designed for operation with a "positive pressure vent system" constructed of locally  
obtained 4” or 5" (or larger) schedule 40 or 80 solid PVC or CPVC pipe. Do not use PVC or CPVC pipe with  
cell/foam type construction (such as “CellCore”) or other non-solid PVC plastic pipe. Larger solid PVC pipe may  
be substituted; however, a PVC increaser to the larger size must be used. Do not insulate the plastic vent pipe.  
Stainless steel venting listed by a nationally recognized testing laboratory for category IV positive pressure gas  
appliance venting may be used instead of plastic pipe venting.  
WARNING: Do not vent this water heater into an existing or traditional gas vent or chimney or combine  
the vent with any other appliance. Such venting could result in failure of the venting system and/or  
exposure to carbon monoxide which can result in property damage, personal injury or death.  
CAUTION: DO NOT use ABS pipe in the venting system. ABS can emit toxic fumes in the event of a building fire.  
8.1 Vent System Design  
These water heater can be vented either vertically, through a ceiling or roof, or horizontally through a wall in any  
direction except down. The vent must be installed and supported to slope downward toward the water heater vent  
connection with at least ¼ inch drop per linear foot of horizontal vent run, to allow proper drainage of  
condensation.  
8.2 Venting of Multiple Units  
Multiple heaters must not be vented into a common duct or breeching. Each unit must be independently vented  
in accordance with the instructions for either horizontal or vertical venting included above.  
8.3 Maximum Allowed Vent Length (Equivalent Length)  
Maximum equivalent length of vent must not exceed the length identified in the table below (consult factory for  
longer equivalent lengths):  
Water Heater  
Prefix  
742  
W/Remote Air  
Input, Btu/h  
500,000  
100 equivalent feet, 225 equivalent feet,  
Input, Btu/h  
500,000  
999,000  
1,500,000  
1,950,000  
vent diameter:  
vent diameter:  
4”  
4”  
5”  
5”  
6”  
6”  
8”  
8”  
1485  
2228  
2971  
950,000  
1,500,000  
1,850,000  
VENT PIPE FITTINGS EQUIVALENT (in feet)  
90º Elbow  
90º Long Radius Elbow  
45º Elbow  
14 feet  
12 feet  
6 feet  
8.4 Vent Construction and Assembly  
1. Clean and deburr all solid PVC, or solid CPVC pipe ends and the joint area and trial assemble (dry-fit) the  
vent before joining with PVC cement following the cement manufacturer’s instructions for making sound air  
and water tight joints.  
2. If category IV stainless steel venting listed by a nationally recognized testing laboratory is used, follow the  
manufacturer’s instructions and assure all joints provide a water and gas tight assembly.  
3. Vent support – The vent system should be supported at intervals no greater than four feet, to prevent sagging  
and distortion.  
4. Testing for leaks. After the vent is assembled, close the end of the vent. With the gas supply turned off,  
energize the combustion blower to apply air pressure to the vent system. Spray each joint and vent  
connection with commercially available leak detection liquid to confirm no air is escaping from any point.  
Repair any leaks and retest. After testing is complete, REMOVE the temporary vent closure.  
5. Attach the PVI vent termination cap supplied with the appliance. This termination is required for proper  
operation and no substitution is allowed.  
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8.5 Horizontal and Vertical Venting Through a Wall or Roof  
Vent terminal locations, clearances, warnings and requirements stated in this manual apply, whether combustion  
air comes from the room or is ducted from outdoors.  
1. The solid PVC or CPVC vent pipe must be sealed to the wall or roof at the point where it passes through the  
wall or roof.  
2. The vent must be terminated with the vent termination cap provided by PVI.  
3. The vent terminal must have a minimum clearance of 4 feet (1.22 m) horizontally from, and in no case be  
located above or below, electric meters, gas meters, regulators and relief equipment.  
4. The vent cap shall terminate at least 3 feet (0.91 m) above any forced air inlet within 10 feet (3.05 m).  
5. The vent shall terminate at least 4 feet (1.22 m) below, 4 feet (1.22 m) horizontally from or 1 foot (0.3 m)  
above any door, window or building air inlet to the building.  
6. The vent system shall terminate at least 1 foot (0.3 m) above grade and at least 1 foot (0.3m) above possible  
snow accumulation levels and shall terminate at least 7 feet (2.13 m) above grade when located adjacent to  
public walkways or gathering areas.  
7. To avoid a blocked flue condition, keep the vent cap clear of snow, ice, leaves, debris, etc.  
8. The vent must not exit over a public walkway, near soffit vents or crawl space vents or other areas where  
condensate or vapor could create a nuisance or hazard or cause property or could be detrimental to the  
operation of regulators, relief valves or other equipment.  
9. A horizontal vent must extend at least one foot beyond the wall.  
10. A horizontal vent terminal must not be installed closer than 3 feet (0.91m) from an inside corner of an L-  
shaped structure.  
11. A vertical vent should exhaust outside the building at least 2 feet (0.61 m) above the highest point of the roof  
within a 10-foot (3.05 m) radius of the termination.  
12. The vertical termination must be a minimum of 3 feet (0.91 m) above the point of exit. A vertical termination  
less than 10 feet (0.91 m) from a parapet wall must be a minimum of 2 feet (0.61 m) higher than the parapet  
wall.  
13. Follow all requirements in the “Venting” sections of this manual and other instructions and markings for  
venting flue products to the outdoors, obtaining adequate combustion and ventilation air and general  
installation instructions.  
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Horizontal Venting and Outside Combustion Air  
Follow all requirements in this manual and other instructions and markings for venting flue products to the outdoors,  
obtaining adequate combustion and ventilation air and general installation instructions.  
Vertical Venting and Outside Combustion Air  
Follow all requirements in this manual and other instructions and markings for venting flue products to the outdoors,  
obtaining adequate combustion and ventilation air and general installation instructions.  
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9
GAS SUPPLY AND PIPING  
Verify that the type of gas specified on rating plate is supplied to the unit. This unit is orificed for operation up to  
2000 feet altitude. The appliance Btu/h output, like other similar equipment, derates approximately 4% per 1000  
feet above sea level. Consult Factory for installations above 2000 feet elevation.  
9.1 Inlet Pressure: Measured at the inlet pressure tap located at the main gas cock. The inlet pressure must remain  
within the minimum flow pressure and maximum static pressure charted below while the unit is at rest and while  
the unit is operating at maximum firing rate.  
Water Heater  
Prefix  
742  
Min Inlet Flow Pressure  
(in. W.C.)  
Max Static Pressure  
(in. W.C.)  
5.0" Nat. Gas  
5.5" Nat. Gas  
6.0" Nat. Gas  
11.0" Nat. Gas  
14" Nat. Gas  
14" Nat. Gas  
14" Nat. Gas  
14" Nat. Gas  
1485  
2228  
2971  
9.2 Manifold Pressure: Measure at the pressure tap on the downstream side of the final manual shutoff valve for  
each stage of operation. The rated manifold pressure appears on the data label. The manifold pressure is preset  
at the factory and adjustment is not usually required. If adjustment is required, the burner must be firing at the  
minimum and/or full rate while the manifold pressure is adjusted.  
9.3 Gas Piping Size: Use the values in “Convert Fittings To Equivalent Straight Pipe” to add the equivalent straight pipe  
for each elbow or tee to obtain the total distance from the meter. Use this corrected total distance from the meter for  
determining the suggested pipe size in the “Single Unit Installation Suggested Gas Pipe Size” table.  
CONVERT FITTINGS TO EQUIVALENT STRAIGHT PIPE  
Fitting Size (inches)  
¾" 1" 1¼" 1½" 2"  
3" 4" 5"  
Equivalent Length of  
Straight Pipe (feet)  
2' 2' 3' 4' 5' 10' 14' 20'  
SINGLE UNIT INSTALLATION SUGGESTED PIPE SIZE  
Maximum Capacity for Natural Gas*  
Equivalent Feet  
From Meter  
MBTU/HR Based on 0.5" W.C. Pressure Drop*  
1-1/4"  
1-1/2"  
1320  
990  
810  
690  
620  
-
2"  
2½"  
3"  
4"  
-
25  
40  
860  
2475  
1900  
1520  
1300  
1150  
1020  
950  
3900  
3000  
2400  
2050  
1850  
1650  
1500  
1370  
1280  
7000  
5300  
4300  
3700  
3250  
2950  
2650  
2450  
2280  
660  
-
60  
-
-
-
-
-
-
-
-
80  
-
100  
125  
150  
175  
200  
6700  
6000  
5500  
5000  
4600  
-
-
850  
-
800  
**Multiplier for alternate pressure drops: 0.3" W.C. 0.77; 1.0" W.C. 1.41; 2.0" W.C. 2.00; and 4.0" W.C. 2.82.  
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MULTIPLE UNIT INSTALLATIONS GAS PIPING SIZE CHART  
Maximum Capacity of Pipe in Thousands of BTU’s per hour for gas pressures of 14 Inches Water Column (0.5 PSIG) or less and a  
pressure drop of 0.05 Inch Water Column (Based on NAT GAS, 1025BTU’s per Cubic Foot of Gas and 0.60 Specific Gravity).  
Nominal Iron  
Length of Pipe in Straight Feet  
Pipe Size,  
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
125  
150  
175  
200  
Inches  
3/4  
1
1 1/4  
1 1/2  
2
2 1/2  
3
4
369  
697  
256  
477  
974  
1500  
2820  
4460  
7900  
205  
384  
789  
1210  
2260  
3610  
6400  
174  
328  
677  
1020  
1950  
3100  
5400  
155  
292  
595  
141  
267  
543  
830  
1560 1440  
2460 2310  
4410 4000  
128  
246  
502  
769  
121  
256  
472  
113  
210  
441  
106  
200  
410  
95  
179  
369  
564  
1100  
1700  
3000  
6150  
86  
164  
333  
513  
79  
49  
74  
138  
287  
441  
1400  
2150  
4100  
6460  
11200  
308  
472  
871  
1400  
2500  
5130  
923  
707  
666  
636  
1720  
2720  
4870  
1330  
2100  
3800  
7690  
1250  
2000  
3540  
7380  
1180  
1900  
3300  
6870  
974  
820  
1540  
2720  
5640  
1300  
2340  
4720  
23500 16100 13100 11100 10000 9000 8300  
9.4 Appliance Isolation during Gas Supply Piping Pressure Test  
1. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during  
any pressure testing of that system at test pressures in excess of ½ PSI (3.5 kPa).  
2. The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff  
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than ½  
PSI (3.5 kPa).  
3. The appliance and its gas connection must be leak-tested before placing it in operation.  
9.5 Gas Connection  
1. Safe operation of unit requires adequate gas supply with the required static and dynamic (flow) pressures.  
Actual piping selection depends on many variables that must be carefully considered by the gas piping  
system designer. Do not select gas pipe sizes based only on the supplied tables. These tables are for use by  
the gas piping system designer as a reference in checking pipe size selections.  
2. Gas pipe size may be larger than heater connection.  
3. Installation of a union is suggested for ease of service.  
4. Install a manual main gas shutoff valve, outside of the appliance gas connection and before the appliance  
gas valve, when Local Codes require.  
5. The gas system installer should clearly identify the emergency shut-off device.  
6. A sediment trap (drip leg) MUST be provided in the inlet of the gas connection to the unit.  
7. Vent limiters/are designed and must respond to pressure changes in the installation environment, as opposed  
to outdoor ventilation. For proper operation, do not connect the vent to outdoor atmosphere.  
9.6 Gas Train and Controls Certification  
NOTE: The gas train and controls assembly provided on this unit have been tested under the applicable  
American National Standard to meet minimum safety and performance criteria such as safe lighting, combustion  
and safety shutdown operation.  
9.7 Gas Control Trains  
All models include gas control trains with the following at least the following components (may be separate or  
combined in common housing): manual gas shutoff valve, two safety shutoff valves, regulator or proportionator,  
manifold pressure tap.  
CAUTION: Do not adjust or remove any screws or bolts on gas train control components which are sealed with a  
red or blue colored compound. Doing so will void all approvals and warranties.  
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10  
GENERAL INFORMATION  
10.1 Temperature and Pressure Relief Valve(s)  
Pipe the relief valve discharge to a suitable open drain. The drain pipe may not be smaller than the relief valve  
opening and must be secured to prevent it from lifting out of the drain under discharge pressure. Do not install  
valves or restrictions in the discharge line.  
10.2 Lower LED Readout  
An adjustable digital operating control is located in the front control panel. The control is factory pre-set at  
approximately 120ºF.To adjust the setpoint to deliver the desired water temperature, press and release the Set 1  
key on the face of the control. When setpoint adjustment is enabled, use the arrow keys to adjust the set point to  
the desired system temperature. See TempTrac Electronic Controller Panel in this manual for more information.  
10.3 High Water Temperature Limit Control  
Appliances are equipped with adjustable limit and fixed high limit controls to control the maximum discharge  
water temperature. These controls are located inside the control cabinet. The high limit control is optionally  
available as the manual reset type and may be reset by pressing the limit reset button accessible through the  
control panel cover. The adjustable limit is of the auto reset type and can be dial adjusted to operate just above  
the set point of the main operating temperature control. Pressing the reset on the high limit control will not cause  
the control to reset until the water temperature has dropped below the set point of the manual reset high limit  
control.  
WARNING: Turn off all electrical service to the appliance when accessing the limit or high limit controls  
located inside the control cabinet. This cabinet contains High Voltage wiring and terminals. If the  
electrical service is not turned off and these terminals are touched, a dangerous shock causing personal  
injury or loss of life could occur. Close and fasten the control cabinet cover before restoring electrical  
service to the appliance.  
10.4 Cathodic Protection  
PVI water heaters do not utilize cathodic protection. However, in hot water systems utilizing cathodic protection,  
hydrogen gas can be produced when the hot water system has not been used for a long period of time (generally  
two weeks or more). Hydrogen gas is extremely flammable. To prevent the possibility of injury under these  
conditions, one of the hot water system faucets should be opened for several minutes before using any electrical  
device connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air  
escaping through the pipe as the hot water begins to flow. Do not smoke, have open flames or turn electrical  
switches on or off near the faucet at the time it is open.  
10.5 Thermal Expansion  
A relief valve that discharges periodically may be due to thermal expansion in a closed system, such as water  
heaters or hot water supply boilers installed in a system closed by components, such as a backflow preventer or  
check valve in the cold water supply or a closed boiler heating loop. These systems must be provided with  
means to control expansion. Contact a water heater or plumbing professional to resolve this situation. Do not  
plug the relief valve.  
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11  
TEMPTRAC™ ELECTRONIC CONTROLLER PANEL  
11.1 Principle Of Operation  
The water heater operates to satisfy the setpoint of the TempTrac digital control whose sensor is located near  
the top of the water heater tank. Demand (flow) will typically create a drop in temperature, thus activating the  
water heater to add heat to the stored water. This setpoint is the desired water temperature to maintain.  
11.2 Lower LED Readout  
The default display of the lower readout (Probe 1) is the stored water temperature sensed near the top of the  
water heater tank. This is used to regulate the temperature of the water heater.  
11.3 Upper LED Readout  
The default display of the upper readout (Probe 3) is the flue gas temperature exiting the heater. This readout  
may also display a temperature reading from Probe 2. Probe 2 can be installed in a thermal well (this optional  
probe and thermal well, with heat conductive paste, is custom and must be ordered from your PVI representative  
or directly from PVI) to remotely monitor water temperatures, such as blended water temperature, downstream  
of a thermal mixing valve or a remote storage tank. All the probes temperatures are available for monitoring  
through the optional MODBUS RTU interface.  
11.4 Control Buttons  
Displays and modifies the temperature set points.  
SET  
In programming mode, it selects a parameter or confirms an operation.  
When held for 3 seconds, displays and modifies the energy saving (Night Time setback)  
settings.  
UP  
In programming mode, it browses the parameter codes or increases a displayed value.  
When held for 3 seconds, displays the working hours of the load relays.  
In programming mode, it browses the parameter codes or decreases a displayed value.  
DOWN  
CLOCK Changes lower display from the stored water temperature to current time and day.  
Changes upper display from Probe 2 temperature to Probe 3 temperature (when installed).  
Also displays the temperature difference of the stored water temperature minus Probe 2  
temperature. When held for 3 seconds, will put you in manual mode for setting 4-20mA  
EXT  
output used in startup (password is required).  
Switches the control ON or OFF. The BAS can still monitor the probe temperatures.  
Appliance will not heat when in the off-state.  
ON/OFF  
(See TempTrac User Manual PV500-40 for full description)  
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11.5 To View the Setpoint  
Push and release the SET key to see the set point value.  
To return to normal display, press SET + UP or wait 15 seconds without pressing any key.  
11.6 To Change the Setpoint  
Push the SET key. The upper display will show the “St1” parameter name, while the lower display will show  
its value.  
Use the UP or DOWN key to cycle through the parameter names.  
Push the SET key to modify a parameter value. The value starts flashing in the lower display.  
To change it push the UP or DOWN keys. Push the SET key again to confirm the value and pass to the  
setting of next set point.  
Repeat the operations described at points 3, 4, 5.  
To Exit: press SET + UP or wait 15 seconds without pressing any key.  
NOTE: Each point has a time out of 15 seconds. If any key is pushed within 15 seconds the controller exits the  
set points programming procedure.  
NOTE: The set value is stored even when the procedure is exited by waiting the time-out to expire.  
11.7 To Change Other Parameters  
Push the SET and DOWN arrow simultaneously for 3 seconds.  
Select the required parameter. The name of the parameter is on the upper display; its value is on the lower  
display.  
Press the SET key: the value of the parameter will start blinking.  
Use UP or DOWN to change the value.  
Press SET to store the new value and move to the following parameter.  
To Exit: Press SET + UP or wait 15s without pressing a key.  
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11.8 LED Display Alarm Messages  
Alarm messages are displayed in the upper LED readout and alternate with the default display. An alarm LED  
ICON is also illuminated. (See TempTrac User Manual PV500-40 for full description.)  
ALARM  
MESSAGE  
RECOMMENDED  
ACTION  
CAUSE  
RESULTS OF ALARM CONDITION  
Inlet temperature sensor is not  
connected or is reading incorrectly. Call Check wiring and sensor  
“P1”  
“P2”  
“P3”  
TP1 probe failure  
for heat and burner modulation output  
signal will revert to low fire.  
Terminals 14 & 17  
Check wiring and sensor  
Terminals 15 & 17  
Temperature sensor is not connected  
or is reading incorrectly.  
TP2 probe failure  
TP3 probe failure  
If no probe, change  
TempTrac setting of P2P  
Temperature sensor is not connected  
or is reading incorrectly or flue gas  
temperature protection is disabled (if  
used).  
Check wiring and sensor  
Terminals 16 & 17  
High temperature limit  
setpoint exceeded  
“HA”  
“LA”  
Buzzer sounds, operation continues  
Buzzer sounds, operation continues  
Manual reset required  
Manually reset required  
Low temperature alarm  
Digital input 3 is activated  
for one or more of the  
following:  
Flame failure or any control  
component failure, if  
equipped with alarm on any  
failure option  
HP  
Unit de-energized after timer delay  
LP  
Digital input 2 is activated  
Unit de-energized after timer delay  
Buzzer sounds, operation continues  
Manually reset required  
Check wiring and sensor  
Maintenance alarm for  
output 1  
Mn1  
Maintenance alarm for  
output 2  
Mn2  
Mn3  
“rtc”  
Buzzer sounds, operation continues  
Buzzer sounds, operation continues  
Energy saving function disabled  
Check wiring and sensor  
Check wiring and sensor  
Reprogram clock  
Maintenance alarm for  
output 3  
The real time clock has lost  
its setting  
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12  
REMOTE CONNECTIONS – TERMINAL STRIP  
A terminal strip for the remote connection is located behind the hinged control panel at the top of the cabinet and  
is accessed by removing the bottom cover and then removing the screws at the top of the hinged cover. The  
following describes the functions of each of these terminals and the factory-installed options required to activate  
the terminals:  
WARNING: Turn off all electrical service to the appliance when accessing the remote connections  
located inside the control cabinet. These terminals are High Voltage. If the electrical service is not turned  
off and these terminals are touched, a dangerous shock causing personal injury or loss of life could  
occur. Close and fasten the control cabinet cover before restoring electrical service to the appliance  
Terminals A1-A2 and P1-P2 are functional only when equipped with the factory installed option required to  
activate the terminals.  
Terminals R1-R2 and C1-C2 are standard pre-wired functions on all models.  
R1-R2: Used to activate /de-activate appliance from remote master control.  
Terminals are provided for wiring to a relay in a remote controller or Energy  
Management System. When the remote relay closes, the circuit from R1 to R2 is completed  
and appliance controls are enabled. Remove the supplied jumper between terminals, if  
remote activation/de-activation is used.  
Option Code Required: NONE (provided as standard on this appliance)  
A1-A2: Used to activate a remote alarm signaling shutdown of combustion control  
Provides a maximum 10 amp relay contact closure when flame safeguard terminates  
combustion due to any fault tripping, such as: air proving switch, high limit switch, flame  
sensor, etc. that are normally proved after a call for heat.  
Option Code Required: NONE (provided as standard on this appliance)  
P1-P2: Activates remote equipment and requires confirmation signal back to the appliance.  
Provides a maximum 10 amp relay contact closure to activate a remote device, such as  
mechanical room air louvers, draft inducer or power venter. The remote device must  
complete the circuit between terminals C1-C2 with a proving switch or relay, prior to the  
appliance being able to energize.  
Option Code Required: LOUVR (Relay With Contacts To Operate Air Damper Or  
Mechanical Draft)  
C1-C2: Used for proving operation of remote device.  
Terminals are provided for wiring to a remote proving switch or relay on devices such as a  
power venter and/or exhaust fan. When the proving switch or relay closes, the circuit from C1  
to C2 is completed and appliance controls are enabled. Remove jumper between terminals, if  
remote proving is used.  
Option Code Required: NONE (provided as standard on this appliance)  
T1-T2: Not Used  
CAUTION: Do not use single strand bell wire for remote field connections to terminals R1-R2 and C1-C2. Use  
only multi-strand copper wire. See table below for wire length and gauge:  
Wire Gauge  
18 GA  
30 FT  
16GA  
50 FT  
14 GA  
75 FT  
12 GA  
Maximum Length  
100 FT  
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13  
START-UP PROCEDURE  
WARNING: You must connect the supplied gas train assembly to the burner union. Then connect the gas  
supply to the gas train. Do not connect the gas supply directly to this union. Failure to install the  
supplied gas train to the burner union before connecting the gas supply may result in uncontrolled gas  
flow into the appliance and/or the appliance area. Failure to follow this warning could result in fire or  
explosion causing property damage, personal injury or death.  
1. Turn off all electrical power to the appliance.  
2. Check all electrical connections for tightness, proper voltage and proper grounding.  
3. Fill the unit with water. Open the relief valve and vents until a steady water flow is observed flowing from the  
highest point in the tank or system. Close the relief valve and continue filling the system at a rate that  
permits air to vent out of the piping.  
4. Be sure all connections into the tank are tight, as leaks at tank fittings will damage the insulation.  
5. CAUTION: Conduct the following gas train leakage test before start-up, at annual intervals and prior to  
investigating the cause of any reported occurrences of delayed ignition.  
a. Using an appropriate bubble detection solution, thoroughly coat all gas train pipe connections. If any  
bubbles are detected, the leaking connection must be tightened, recoated, and rechecked to assure  
stoppage of the leak.  
b. Attach a manometer to measure the gas pressure at the manual gas shutoff valve located just upstream  
of the gas train. Assure the gas train inlet pressure is within the maximum static pressure specified (e.g.  
14" W.C.), and tightly close the gas train manual shutoff valve closest to the burner. Disconnect the  
manometer.  
c. Attach the manometer to the gas train manual shutoff valve closest to the burner and record the  
measured gas pressure in inches of water column (W.C.). Measure and record the gas pressure again  
after 15 minutes. If gas pressure has increased from the starting gas pressure, there is a gas leak  
through all gas valve seats. The gas leak must be further isolated to one or more of the operating gas  
valves. (For example, a solenoid actuated gas shutoff valve.)  
d. Turn off the main manual gas shutoff valve. Replace any leaking valve, then reassemble and leak test  
the gas train again before start-up is attempted.  
6. Verify that the unit is supplied with the type of gas specified on the rating plate.  
7. Before beginning test, make sure the main manual gas valve is in the “OFF “position.  
8. Check the inlet gas pressure before start-up, using a manometer or a 0 to 28" W.C. pressure gauge (This is  
the pressure measured before all components in the gas train). The manometer must stay connected  
throughout the testing, as the inlet pressure must be monitored during the firing of the burner. Record static  
pressure. The maximum inlet gas pressure must not exceed the value specified on the information label.  
Pressures above this value could cause damage to the diaphragm in the gas valve or pressure regulator.  
9. Drill hole in vent pipe 12” to 24” from appliance flue outlet, but below draft regulator (for combustion analysis  
equipment).  
10. Turn on all electrical power to the appliance. Reset all safety devices (high limit, pressure switch, Low-water  
Cutoff, etc.).  
11. Set the digital Temperature Control on the front control panel to the desired inlet water temperature.  
12. Set the adjustable limit just above the setpoint of the digital control.  
13. Turn the manual gas valve to the “ON” position.  
14. The Ignition Control should go through its “Call For Heat” process and ignite the burner (see “Sequence of  
Operation”).  
15. If the operating control switches are closed, the burner blower should come on and pre-purge begins.  
16. If nothing happens, check for a lockout condition and reset it by pushing the flame safeguard reset button.  
Some safety devices are wired in the operating circuit and may not indicate alarm. If no indication of alarm  
exists, check gas pressure switches, electronic and float low water cutoffs and temperature limits.  
17. After the pre-purge, the flame control energizes spark ignition and opens the gas valve for approximately 4  
seconds. After the burner has lit and the primary safety control senses a flame, the burner will remain on  
until the call for heat is satisfied or operation is interrupted by a safety devise.  
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18. If the burner fails to light, the flame control will lockout. When this happens press the reset button on the  
front of the control to recycle burner.  
19. Once the main burner flame is established the firing rate will be controlled by the TempTrac control.  
20. While the unit is running, verify the inlet gas pressure is within the range shown in the “GAS SUPPLY AND  
PIPING” section of this manual.  
21. Burner Combustion Adjustment. Burner combustion should only be adjusted using a combustion analyzer.  
Do not attempt to adjust burner by sound or sight. With the burner firing, insert the combustion analyzer  
probe in the flue vent approximately two feet from the appliance. Adjust to obtain the desired O2 and CO2 in  
the combustion products.  
22. Perform flue gas analysis while the stored water is near the desired temperature and unit is in stable  
operation (after running about 2 to 5 minutes):  
Net stack temperature should be 10ºF to 40ºF (Maximum 160ºF)  
O2 should be from 3% to 5%. (target 4%)  
CO2 should be from 9% to 10% (target 9½%)  
CO should not exceed 200 PPM  
IMPORTANT: If the appliance is to be shut down for an extended period of time, the primary gas valve and the  
water supply should be shut off. When the appliance is returned to service, a thorough inspection of all utilities  
and general appliance condition should be conducted.  
14  
PERIODIC MAINTENANCE  
Listed below are items that must be checked to insure safe reliable operations. Maintenance must be performed  
by a qualified service or maintenance provider. Verify proper operation after servicing.  
WARNING: When servicing the controls, use exact, factory authorized, replacement parts and label all  
wires prior to disconnection. Verify proper operation after servicing. Incorrect parts substitution and  
wiring errors can cause damage, improper operation, fire, carbon monoxide and other unexpected and  
unsafe conditions that could result in fire, injury or death.  
1. Examine the appliance and venting system at least once a year. Check more often in first year to determine  
inspection interval:  
a. Check all joints and pipe connections for tightness, corrosion or deterioration.  
b. Check the electronic-ignition system for quick ignition and a proper flame signal.  
c. Check all safety controls including thermostats for proper operation.  
d. Check safety shut-off valves for operation and tightness.  
e. Have the entire system, including, but not limited to, the burner, heat exchanger and venting system,  
periodically inspected by a qualified service agency.  
2. Any sign of soot in the burner or in the flue indicates the need for a combustion inspection. If soot has  
formed, the most common causes are restricted combustion air or excessive gas. A blocked heat exchanger  
can cause unsafe operation and will reduce efficiency. Contact a qualified serviceman or installer to inspect  
and clean the heat exchanger or vent.  
3. Inspect low water cutoffs and relief valves for proper operation at every six months, or more often if indicated  
by inspection.  
4. Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and  
liquids.  
5. Check frequently to be sure the flow of combustion and ventilation air is unobstructed to the appliance.  
6. If the appliance is to be shut down for an extended period of time, the primary gas valve and the water  
supply should be shut off. When the appliance is returned to service, a thorough inspection of all utilities and  
general appliance condition should be conducted.  
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15  
DIAGRAMS  
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Wiring Diagram  
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Burner Diagram  
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MODEL NUMBER:  
SERIAL NUMBER:  
INSTALLATION DATE:  
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PVI INDUSTRIES®, LLC 3209 Galvez Ave. Fort Worth, Texas 76111 Phone 1-800-433-5654 www.pvi.com  
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