White Rodgers 37C73U User Manual
FOR YOUR SAFETY
“WHAT TO DO IF YOU SMELL GAS”
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS BEFORE INSTALLING OR OPERATING THIS CONTROL COULD
CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH.
CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH.
RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.
This control must be installed or serviced only by a
1.
professional.
Do not use force when moving the gas control knob. If you
Do not use force when moving the gas control knob. If you
2.
cannot turn the knob with hand pressure only, the control
must be replaced.
Do not use the control if the knob will not “pop up” after
must be replaced.
Do not use the control if the knob will not “pop up” after
3.
being depressed while the knob is in the PILOT position.
The mechanism is damaged and the control must be
replaced. Shut off gas to the water heater.
For your safety, this control is supplied with tamper
The mechanism is damaged and the control must be
replaced. Shut off gas to the water heater.
For your safety, this control is supplied with tamper
4.
resistant screws. Do not attempt to repair or adjust the
control. If you experience problems, replace the control
immediately.
control. If you experience problems, replace the control
immediately.
Continuing to use a damaged control
could result in fire and/or explosion.
An odorant has been added to the gas to help you detect
An odorant has been added to the gas to help you detect
5.
it. Before lighting, search for the odor of gas by sniffing at
floor level around the water heater.
floor level around the water heater.
In some situations, the gas may lose its odor. To detect
6.
unodorized gas, you must have a gas detector which can
be purchased from your gas company. If you do not have a
detector and have the slightest suspicion that gas may be
present, get out of the house and call the gas company. DO
NOT RELY TOTALLY ON YOUR NOSE.
be purchased from your gas company. If you do not have a
detector and have the slightest suspicion that gas may be
present, get out of the house and call the gas company. DO
NOT RELY TOTALLY ON YOUR NOSE.
37C73U
Water Heater Thermostat Control
Installation Instructions
FOR NATURAL GAS ONLY
PART NO. 37-7202A
1036
Fixed Adjustment Main and Pilot Regulators
The main and pilot gas regulators require no field service. They
automatically control and maintain the outlet main and pilot
burner gas pressure.
automatically control and maintain the outlet main and pilot
burner gas pressure.
WARNING
!
Do not use this Natural Gas control on a LP Gas water
heater. Improper operation could occur, resulting in
personal injury and/or death due to Carbon Monoxide
poisoning, fire, or explosion. Check for proper gas type
as listed on the rating plate affixed to the water heater.
heater. Improper operation could occur, resulting in
personal injury and/or death due to Carbon Monoxide
poisoning, fire, or explosion. Check for proper gas type
as listed on the rating plate affixed to the water heater.
WARNING
!
Scald burns occur in under one second with 160° water,
which this thermostat will deliver if the temperature dial
is set at “VERY HOT”. Lower settings of the temperature
dial will reduce the risk of scald and will reduce your
fuel bill.
which this thermostat will deliver if the temperature dial
is set at “VERY HOT”. Lower settings of the temperature
dial will reduce the risk of scald and will reduce your
fuel bill.
www.white-rodgers.com
www.emersonclimate.com
Model
Main Regulator
Pilot Regulator
Flange
Outlet
Flying Leads
37C73U168
3.5" W.C.
4.0" W.C.
1-1/4"
42 KBTU/hr
No Flying Leads
37C73U170
4.0" W.C.
4.9" W.C.
1"
38 KBTU/hr
No Flying Leads
37C73U171
4.0" W.C.
4.0" W.C.
2-1/2"
40 KBTU/hr
No Flying Leads
37C73U172
4.0" W.C.
4.0" W.C.
2-1/4"
40 KBTU/hr
No Flying Leads
37C73U173
4.0" W.C.
4.0" W.C.
1-1/4"
45 KBTU/hr
No Flying Leads
37C73U174
5.0" W.C.
5.0" W.C.
1-1/4"
37.5 KBTU/hr
11" Flying Leads