Low--Ambient
Pressure Switch
KSALA0201R22
KSALA0301410
Installation Instructions
NOTE: Read the entire instruction manual before starting the
DESCRIPTION AND USAGE
installation.
The low--ambient pressure switch kit is a long life pressure switch
which turns the fan on and off as shown in Table 1. It is wired in
series with black fan lead. Sleeve--bearing motors can be used
with this control.
SAFETY CONSIDERATIONS
Improper
installation,
adjustment,
alteration,
service,
maintenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory authorized kits or accessories
when modifying products.
Follow all safety codes. Installation must be in compliance with
local and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
INSTALLATION
The pressure switch is mounted inside the outdoor unit cabinet by
using adapter tube supplied. The adapter tee is mounted to liquid
service valve and tube is routed through one of the knockout
holes in unit cabinet. From inside cabinet, the flare nut is attached
to extender tube. (See Fig. 1.) The pressure switch is wired in
series with black or common fan lead.
PROCEDURE 1—WIRING FOR ALL VOLTAGES OF
COOLING UNITS
Recognize safety information.
For all voltages of cooling units, refer to Fig. 2 and wire
low--ambient pressure switch as follows:
This is the safety--alert symbol
. When you see this symbol on
1. Disconnect black fan lead from contactor and connect this
lead to yellow or violet wire from low--ambient pressure
switch using connector supplied.
the unit and in instructions or manuals, be alert to the potential
for personal injury.
These words are used with the safety--alert symbol. DANGER
identifies the most serious hazards, which will result in severe
personal injury or death. WARNING signifies a hazard, which
could result in personal injury or death. CAUTION is used to
identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability, or operation.
2. Connect blue wire from low--ambient pressure switch to
contactor terminal from which black fan lead was
removed.
PROCEDURE 2—WIRING FOR HEAT PUMPS
Heat pumps require a normally closed isolation relay with the
24--v coil connected to the C and O terminals of defrost board.
A. 208/230v Applications
For 208/230--v heat pump applications, refer to Fig. 3 and wire
low--ambient pressure switch as follows:
!
WARNING
1. Remove black fan lead from defrost board terminal OF2
and reconnect it to NC terminal of isolation relay. Connect
yellow or violet lead from low--ambient pressure switch to
same NC terminal of isolation relay.
2. Connect a wire from the other NC terminal of isolation
relay to OF2 terminal of defrost board. Connect blue lead
from low--ambient pressure switch to same NC terminal of
isolation relay.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before beginning any installation or modification, be sure
the main electrical disconnect is in the OFF position. Tag
the disconnect switch with a suitable warning label.
B. 460v Applications
For 460--v heat pump applications, refer to Fig. 4 and wire
low--ambient pressure switch as follows:
INTRODUCTION
These instructions cover the installation of low--ambient pressure
switch Part No. KSALA0201R22 and KSALA0301410 in all
single--speed air conditioners or heat pumps using R--22 or
R--410A. Refer to Table 1 for kit usage. This device is a long life
pressure switch that maintains head pressure by turning the fan
off and on. Other accessories may be required. Refer to the
Required Changes for Cooling Units and Heat Pump Units
section.
1. Remove black fan lead from outdoor fan relay terminal
number 3 and reconnect it to NC terminal of isolation
relay. Connect yellow or violet lead from low--ambient
pressure switch to same NC terminal of isolation relay.
2. Connect a wire from outdoor fan relay terminal number 3
to other NC terminal of isolation relay. Connect blue lead
from low--ambient pressure switch to same NC terminal of
isolation relay.
1
START--UP
To start units equipped with the low--ambient pressure switch,
perform the following steps:
T
1. Turn power on to unit.
2. Set thermostat below room temperature.
TDR
3. Wait for the unit to start. There may be a 5--minute delay
in the thermostat or in the outdoor unit.
4. Observe unit operation as described below.
a. The fan will be off when compressor starts.
C
b. At outdoor temperatures around 0_F, fan may not run
at all.
LPS
c. At summer temperatures, fan will start after 10 to 30
sec of compressor operation and may not turn off until
thermostat is satisfied.
LPS LOW-PRESSURE SWITCH
CONTACTOR COIL
TDR TIME DELAY RELAY
C
d. At outdoor ambients between 80_F and 20_F, fan will
T
RELAY COIL
turn on and off to maintain pressure as shown in Table
1.
FACTORY WIRING
FIELD WIRING
A93165
Fig. 5 — Low Voltage Wiring for Winter Start Control
3
7
3
/
/
32
″ x
″
8
(5.56 x 9.53) SLOT
4 REQ'D
9
/
64
″
(3.45) DIA HOLE
2 REQ'D
H
G
3
/
″
8
6 1
(154.0)
/
″
16
(9.6)
TYP
J
1
/
″
2
(12.7)
TYP
SUPPORT
MAT'L: 18 GA STEEL
7
/
″
16
C
(11.6)
TYP
E
A
1/2″
(12.7)
TYP
9
/
64
″
(3.45) DIA HOLE
1 REQ'D
K
7
B
/
16
″
(11.6)
TYP
J
7
/
32
″
(5.56) DIA HOLE
3 REQ'D
1
/
4
″
1
/
4
″
M
(6.3)
TYP
(6.3)
TYP
L
D
7
/
32
″
x 2″
BAFFLE
(5.56 x 50.8) SLOT
MAT'L: 20 GA STEEL
SCREW
10 REQ'D
F
SUPPORT
4 REQ'D
OUTDOOR
UNIT
AA
BAFFLE
2 REQ'D
BAFFLE ASSEMBLY
A95444
®
Fig. 6 — Carrier WeatherMaker Units
4
5
1
3
/ ″ x / ″ (5.56 x 9.53) SLOT
4
8
4 REQ'D
1
/ ″ (3.45) DIA HOLE
8
2 REQ'D
H
3
/ ″
8
5 5
(151.5)
/
″
16
(9.6)
1
/ ″ (5.56) DIA HOLE 2 REQ'D
4
J
G
1
/ ″
2
(12.7)
TYP
SUPPORT
MAT'L: 18 GA STEEL
7
/
″
16
C
(11.6)
E
A
1/2″
(12.7)
1
/ ″ (3.45) DIA HOLE
8
1 REQ'D
K
7
B
/
16
″
(11.6)
J
1
/ ″ (5.56) DIA HOLE
4
3 REQ'D
1
3
/ ″
6″
(152.4)
4
/ ″ (9.6)
8
(6.3)
L
D
1
/ ″ x 2″
4
BAFFLE
(5.56 x 50.8) SLOT
MAT'L: 20 GA STEEL
SCREW
10 REQ'D
F
SUPPORT
4 REQ'D
AA
OUTDOOR
UNIT
BAFFLE
2 REQ'D
BAFFLE ASSEMBLY
A95445
®
Fig. 7 --- Bryant Reliant Units
6
7
3
1
7 7/ ″
/
16
″
/ ″ (3.45) DIA
8
8
(200.0)
(4.6)
2 REQ'D
F
5 3
(128.0)
/
″
64
E
C
C
1
/ ″
2
E
1
/ ″
4
(12.7)
(6.4)
5 3
/
64
″
(128.0)
13
/
64
″
1
/ ″
2
(5.4)
TYP
7 29
/
32
″
(200.8)
B
7 7/ ″
(199.9)
8
(12.7)
TYP
BAFFLE - LEFT
25
/
64
″
(10.0)
1 21
/
32
″
(42.1)
MAT'L: 20 GA STEEL
BAFFLE - RIGHT
MAT'L: 20 GA STEEL
D
2 1/ ″
(63.5)
1
2
/ ″ (5.56) DIA
4
A
2 REQ'D
2 1/ ″
(63.5)
1
3
A
2
/ ″ x / ″ (5.56 x 9.53) SLOT
4
8
6 REQ'D
D
1
/ ″ (5.56) DIA
4
4 REQ'D
1 21
/
32
″
(42.1)
G
(10.0)
1
3
/ ″ x / ″ (5.56 x 9.53) SLOT
4
8
25
Ú
″
64
6 REQ'D
AA
C
4 9
/
″
(105.2)
64
23
/
64
″
LEFT
SIDE
RIGHT
SIDE
45¡
TYP
(9.2)
J
2 5
(52.6)
/
″
64
SCREW
14 REQ'D
1
/ ″ (5.56) DIA
4
4 57
Ú
″
64
2 REQ'D
(124.2) TYP
SUPPORT
3 REQ'D
1
OUTDOOR
UNIT
/ ″ (12.7)
2
8 5
/
64
″
(205.3)
TYP
1
TYP
23
/ ″
4
/
64
″
(9.2)
(6.4)
SUPPORT
MAT'L: 18 GA STEEL
1
BAFFLE ASSEMBLY
/ ″ (3.45) DIA.
J H
8
4 REQ'D
A95446
Fig. 8 --- Carrier / Bryant / Payne Cube Units with 3/8” Coil Tubing
8
9
1″
(25.4)
C
1
5
/ ″
5
/
″
2
16
(134.2)
D
(12.7)
E
F
3
/ ″
8
1
/ ″
2
(10.3)
(12.7)
1
/4
″ (6.35) x 1
/
2″ (12.7) SLOT
(2) REQ'D
3
/ ″
8
1
/ ″
2
(10.3)
(12.7)
A
B
7
/
″
16
(11.8)
H
G
7
1
/
″
16
/4
″ (6.35) x 3
/4″ (19.05) SLOT
(11.8)
(15) REQ'D
WIND BAFFLE
7
/
″
16
(11.8)
3
/ ″
8
(10.3)
1
/ ″
2
(12.7)
WIND BAFFLE
1
/
8″ (3.45) DIA HOLE
(3) REQ'D
BAFFLE
SUPPORT A
SUPPORT A
1″
(25.4)
BAFFLE
SUPPORT B
5
5
/
″
16
(134.2)
1
/4
″ (6.35) x 1
(2) REQ'D
/2″ (12.7) SLOT
3
/ ″
8
1
AA
/ ″
2
(10.3)
(12.7)
7
/
″
16
(11.8)
H
G
1″ (25.4) x 3″(76.2)
NOTCH (THIS SIDE)
3″
(76.2)
J
7
/
″
16
(11.8)
3
/ ″
8
(10.3)
1
/ ″
2
(12.7)
1
/
8″ (3.45) DIA HOLE
(3) REQ'D
SUPPORT B
BAFFLE ASSEMBLY
(RIGHT AND LEFT HAND REQ'D)
A95447
Fig. 9 --- Payne Units—Models PA10 / PA12 and PH10 / PH12
10
11
A06235
Fig. 10 --- Base / Comfortt / Legacyt Units Baffle Assembly
12
13
BAFFLE-1
MATL: 20 GA STEEL
A06231
BAFFLE ASSEMBLY
A06230
Fig. 11 --- Performancet and Preferredt Series Baffle Assemblies
14
BAFFLE-2
MATL: 20 GA STEEL
A06232
BAFFLE-3
MAT'L: 20 GA STEEL
A06234
Fig. 12 --- Performancet and Preferredt Series Baffle Assemblies (continued)
15
SUPPORT
MAT'L: 20 GA STEEL
A06233
Fig. 13 --- Performancet and Preferredt Series Baffle Assemblies (continued)
16
17
Printed in U.S.A.
Edition Date: 5/06
Copyright 2006 CAC / BDP S 7310 W. Morris St. S Indianapolis, IN 46231
Catalog No: AG-SALA-07
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Replaces:AG--SALA--05
18
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