White Rodgers 37E37A-903 & 906 User Manual

Page of 8
www.white-rodgers.com
www.emersonclimate.com
37E73A-903 & 906 INTELLI-VENT™
Water Heater Thermostat Control
Installation Instructions
For Natural Gas Only
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.
PART NO. 37-7109A
0951
The 37E73A-903/906 INTELLI-IGNITION™ control is a 
combination gas valve, ignition control, and thermostat for 
use on Power Vented water heaters. The microcomputer in 
the control supervises the ignition sequence and timings 
for the water heater, and provides diagnostic codes in case 
of system malfunction. The control provides direct burner 
ignition using the White-Rodgers’ Silicon Nitride ignitor. The 
control uses the INTELLI-IGNITION™
 
technology to greatly 
extend the ignitor’s life.
Fixed Adjustment Regulator Controls: The gas regulator 
on this control requires no field service. The regulator 
automatically controls and maintains the burner gas pressure.
 DESCRIPTION
 PRECAUTIONS
Do not use this Natural Gas control on LP Gas water 
heater.  Improper  operation  could  occur,  resulting  in 
personal injury and/or death due to Carbon Monoxide 
(CO)  poisoning,  fire,  or  explosion.  Check  for  proper 
gas  type  as  listed  on  the  rating  plate  affixed  to  the 
water heater.
WARNING
!
CONTENTS
Description ............................................................. 1
Precautions ............................................................ 1
Specifications ......................................................... 2
Installation .............................................................. 2
Wiring ..................................................................... 5
Operation ................................................................ 6
Troubleshooting ...................................................... 7
“WHAT TO DO IF YOU SMELL GAS”
Do not try to light any appliance.
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.
  
WARNING
!
FIRE, SHOCK AND EXPLOSION HAZARDS
•  Shut off main gas to appliance for service or until
installation is complete.
•  Disconnect electric power before servicing.
•  Do not exceed the specified voltage.
•  Replace  existing  control  with  recommended
model.
•  Protect the control from direct contact with water
(dripping, spraying, rain, etc.)
•  If the control has been in direct contact with water,
replace the control.
•  Label all wires before disconnection when servic-
ing controls. Wiring errors can cause improper and 
dangerous operation.
•  Route and secure wiring away from flame.
•  Ensure proper earth grounding of appliance.
•  Ensure proper connection of line neutral and line
hot wires.
•  Do not use tools to operate this control.
•  Do not take control apart, there are no serviceable
parts inside.
•  Do not use control if it has been flooded.
•  Never stand on the control or use as a step.
WARNING
!