White Rodgers Lawn Mower 11A79 2 User Guide

11A79-2  
Direct Immersion  
Hot Water Control  
WHITE-RODGERS  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
This control is designed for use on hot water heating This control has single-pole, double-throw switch action,  
systems.  
offering terminals that have open-on-rise switch action as  
well as close-on-rise switch action. It may be used as a  
high limit control, low limit control, circulator control, or as  
a combination low limit and circulator control.  
It has a coiled element that is immersed directly into the  
boiler water. This feature gives an unusual speed of  
response to rapid changes of water temperature thereby  
preventing thermal lag.  
PRECAUTIONS  
THIS CONTROL MUST BE INSTALLED BY A QUALI-  
FIED INSTALLER.  
CAUTION  
!
Shut off main gas to heating system until installa-  
tion is complete.  
Do not exceed the specification ratings.  
All wiring must conform to local and national electrical  
codes and ordinances.  
Label all wires prior to disconnection when ser-  
vicingcontrols.Wiringerrorscancauseimproper  
and dangerous operation.  
This control is a precision instrument, and should be  
handled carefully. Rough handling or distorting compo-  
nents could cause the control to malfunction.  
Following installation or replacement, follow ap-  
pliance manufacturer's recommended installa-  
tion and/or service instructions to insure proper  
operation.  
This control has been accurately calibrated at the factory.  
Any attempt to calibrate this control will void the White-  
Rodgers warranty.  
WARNING  
Do not use on circuits exceeding specified volt-  
age.Highervoltagewilldamagecontrolandcould  
cause shock or fire hazard.  
!
CAUTION  
!
To prevent electrical shock and/or equipment  
damage, disconnect electric power to system at  
main fuse or circuit breaker box until installation  
is complete.  
INSTALLATION  
If the boiler manufacturer recommends a control location, When used as a circulator control, it may be located  
follow such recommendations. If none is offered, the near the boiler outlet or riser.  
following information gives suggested locations.  
When used as a combination low limit and circulator  
For high limit service, the control should be located in control, it should be located the same as suggested for  
thehottestpartoftheboiler.Thisisusuallyatthetopofthe low limit service.  
boiler. A high limit control should not be located in the  
When tightening the control into the boiler, care should be  
section of the boiler that contains the heat exchanger that  
taken to apply all leverage to the hexagonal nut only to  
supplies domestic hot water.  
avoid damage to the diaphragm or control mechanism.  
For low limit or operating service, the control should be  
located so that it responds to the temperature of the  
section of the boiler that heats domestic hot water.  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
PART NO. 37-1022B  
Replaces 37-1022-A  
9520  
Printed in U.S.A.  
ST. LOUIS, MISSOURI 63123-5398  
R
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