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Installation Instructions for
Heating & Cooling
Model 350
WHITE-RODGERS
CONTENTS
Preparations........................................... 1
Thermostat Features.............................. 2
Removing Old Thermostat ..................... 3
Mounting and Wiring .............................. 4
Set Heat Anticipator ............................... 5
New Thermostat Operation .................... 6
Specifications ......................................... 7
Troubleshooting ..................................... 8
PREPARATIONS
THERMOSTAT FEATURES
REMOVING OLD THERMOSTAT
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.
Make a note here of the anticipator setting on
the old thermostat for future reference and use in step 5.
The heat anticipator pointer, if adjustable, will be set at one of a
series of numbers representing the current rating of the primary
control in your furnace. The number will be one of the following:
.2, .4, .8, etc. or 0.2, 0.4, 0.8, etc.
If no heat anticipator/indication is showing, do not be concerned;
move on to the next step.
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.
CAUTION
!
Printed in U.S.A.
PART NO. 37-6237A
0116
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
Failure to follow and read all instructions carefully be-
fore installing or operating this control could cause
personal injury and/or property damage
Assemble tools required as shown below.
YOUR THERMOSTAT REPLACES
1
2
3
WIRE CUTTER/STRIPPER
FLAT BLADE SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
Description 350
Standard Heat & Cooling Systems – 4 or 5 wires Yes
Standard Heat Only Systems Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces Yes
Standard Central Air Conditioning Yes
Gas or Oil Heat Yes
Electric Furnace Yes
Hydronic (Hot Water) Zone Heat – 2 Wires Yes
Hydronic (Hot Water) Zone Heat – 3 Wires No
Heat Pump (No Aux or Emergency Heat) Yes
Heat Pump (with Aux or Emergency Heat) No
Baseboard Electric Heating or Line Voltage (120 or 240 volt) No
SPIRIT LEVEL OR PLUMB BOB AND LINE—
THERMOSTAT MUST BE LEVEL TO WORK PROPERLY
Figure 1.
MOUNTING
SCREWS
ANTICIPATOR
BASE
COVER
MOUNTING
SCREWS
KEEP THIS AREA
CLEAR OF WIRES
SWITCHING
SUBBASE
90
80
70
60
50
90
80
70
60
50
AUTO
FAN
ON
COOL
SYSTEM
OFF
HEAT