TOTALINE P374-1500 Installation Instructions Manual
DIGITAL THERMOSTAT
Installation
Instructions
MODEL P374-1500
3 HEAT - 2 COOL
6:03
Su
AUTO
Am
68
70
67
o
COOL
HEAT
o
DUAL
FUEL
HEAT
PUMP
MULTI-STAGE PROGRAMMABLE
TOTALINE
Replacement Components Division Carrier Corporation 7/99
Table Of Contents
PREPARATION
REMOVE OLD THERMOSTAT
INSTALL BACKPLATE & WIRE
WIRING DIAGRAMS
CALIBRATION
TEST OPERATION
TROUBLESHOOTING
CAUTION
Replacement Components Division - Carrier Corporation
This device complies with Part 15 of the FCC rules.
Operation is subject to the following 2 conditions:
(1) This device may not cause harmful interference,
and (2) This device must accept any interference
received, including interference that may cause
undesired operation.
Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
Model No.
P374-1500
WARNING
2
3
4
5
8
9
10
Page 1
STEP #1
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
Make sure your Heater/Air Conditioner
is working properly before beginning
installation of the thermostat.
PREPARATION
Proper installation of the thermostat will be
accomplished by following these step
by step instructions. If you are unsure
about any of these steps, call a qualified
technician for assistance.
Assemble tools as shown below.
Drill with 3/16
inch Drill Bit
Flat Blade
Screwdriver
Wire cutter
& Stripper
(when not using
j-box)
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
Carefully unpack the thermostat.
Save the screws, wall anchors, and
instructions.
Page 2
STEP #2
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
REMOVE OLD THERMOSTAT
Turn off the power to the Heating/Air
Conditioning system at the main fuse
panel. Most residential systems have
a separate breaker for disconnecting
power to the furnace.
Remove the cover of the old thermostat.
If it does not come off easily check for
screws.
Loosen the screws holding the thermostat
base or subbase to the wall, and lift away.
Disconnect the wires from the old
thermostat. Tape the ends of the wires
as you disconnect them, and mark them
with the letter of the terminal for easy
reconnection to the new thermostat.
o
Am
6:03
70
Su
COOL
AUTO
HEAT
o
68
67
Keep the old thermostat for reference
purposes, until your new thermostat is
functioning properly.
Page 3
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