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Installation Instructions for
Heating & Air Conditioning
Model 500
Non- Programmable
Heat Pump Thermostat
YOUR THERMOSTAT REPLACES
Description
Heat Pump (No Aux or Emergency Heat)
Heat Pump (with Aux or Emergency Heat)
Standard Heat & Cooling Systems
Standard Heat Only Systems
Millivolt Heat Only Systems - Floor or Wall Furnaces
Standard Central Air Conditioning
Gas or Oil Heat
Electric Furnace
Hydronic (Hot Water) Zone Heat - 2 Wires
Hydronic (Hot Water) Zone Heat - 3 Wires
2
THERMOSTAT DETAILS
W904
Clip for
W905
Celsius
Clip for
Slow Cycle
Figure 1. Thermostat base
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
1
Yes
Yes
No
No
No
No
No
No
No
No
3
Mounting
hole
O/B
Terminal
Switches
Selection
W906 for Emergency
Heat Second Stage
Fan Control
Printed in U.S.A.
CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ......................... 1-2
Mounting and Wiring .................................. 2-3
Check Thermostat Operation ..................... 4-5
Specifications ................................................ 5
Troubleshooting ......................................... 5-6
PREPARATIONS
Assemble tools required as shown below.
FLAT BLADE SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY
Failure to follow and read all instructions carefully
before installing or operating this control could cause
personal injury and/or property damage.
REMOVING OLD THERMOSTAT
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electrical power to the system at the main
fuse or circuit breaker until installation is complete.
Before removing wires from old thermostat's switching subbase,
label each wire with the terminal designation it was removed from.
1. Remove Old Thermostat: A standard heat/cool thermostat
consists of three basic parts:
a. The cover, which may be either a snap-on or hinge type.
b. The base, which is removed by loosening all captive screws.
c. The switching subbase, which is removed by unscrewing
the mounting screws that hold it on the wall or adaptor plate.
2. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
3. Remove the front cover of the old thermostat. With wires still
attached, remove wall plate from the wall. If the old thermostat
has a wall mounting plate, remove the thermostat and the wall
mounting plate as an assembly.
4. Identify each wire attached to the old thermostat using the
labels enclosed with the new thermostat.
5. Disconnect the wires from the old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
6. Install new thermostat using the following procedures.
WIRE CUTTER/STRIPPER
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL-
PART NO. 37-6398C
Replaces 37-6398B
0341
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Summary of Contents for White Rodgers 500
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Page 1: Table Of Contents
Installation Instructions for Heating & Air Conditioning Model 500 Non- Programmable Heat Pump Thermostat YOUR THERMOSTAT REPLACES Description Heat Pump (No Aux or Emergency Heat) Heat Pump (with Aux or Emergency Heat) Standard Heat & Cooling Systems Standard Heat Only Systems Millivolt Heat Only Systems –... -
Page 2: Removing Old Thermostat
REMOVING OLD THERMOSTAT CONTINUED FROM FIRST PAGE ATTENTION! This product does not contain mercury. How- ever, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. -
Page 3: Mounting And Wiring
MOUNTING AND WIRING CONTINUED FROM SECOND PAGE Changeover Relay* * Changeover Relay is energized in COOL when O/B switch is in the “O” position Changeover Relay is energized in HEAT when O/B switch is in the “B” position ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency CUT AND TAPE OFF! Changeover... -
Page 4: Check Thermostat Operation
CHECK THERMOSTAT OPERATION NOTE To prevent static discharge problems, touch side of ther- mostat to release static build-up before touching any keys. If at any time during testing your system does not operate properly, contact a qualified serviceperson. Fan Operation If your system does not have a G terminal connection, skip to Heating System. -
Page 5: Specifications
CHECK THERMOSTAT OPERATION CONTINUED FROM FOURTH PAGE 9 Displays currently programmed set temperature (this is blank when SYSTEM switch is in the OFF position). 10 “BATT” is displayed when 2 “AAA” batteries are low and should be replaced. Configuration Menu The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements. - Page 6 TROUBLESHOOTING CONTINUED FROM FIFTH PAGE Symptom No Heat No Cool Heat, Cool or Fan Runs Constantly. Furnace (Air Conditioning) Cycles Too Fast or Too Slow (narrow or wide temperature swing) Thermostat Setting and Thermostat Thermometer Disagree Blank Display and/or Keypad Not Responding Possible Cause 1.