White Rodgers 37E37A-903 & 906 User's Manual

White Rodgers Thermostats User's Manual - 37E37A-903 & 906.
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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

• Shutoffmaingastoapplianceforserviceoruntil

installation is complete.

• Disconnectelectricpowerbeforeservicing.
• Donotexceedthespecifiedvoltage.
• Replace existing control with recommended

model.

• Protectthecontrolfromdirectcontactwithwater

(dripping, spraying, rain, etc.)

• Ifthecontrolhasbeenindirectcontactwithwater,

replace the control.

• Labelallwiresbeforedisconnectionwhenservic-

ing controls. Wiring errors can cause improper and 
dangerous operation.

• Routeandsecurewiringawayfromflame.
• Ensureproperearthgroundingofappliance.
• Ensureproperconnectionoflineneutralandline

hot wires.

• Donotusetoolstooperatethiscontrol.
• Donottakecontrolapart,therearenoserviceable

parts inside.

• Donotusecontrolifithasbeenflooded.
• Neverstandonthecontroloruseasastep.

WARNING

!

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