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Sample Wiring Diagrams
H2
G2
3 conductor 18 gage
unshielded cable from
the thermostat to the
RS+5
remote sensor.
RS
RS GND
RS-GND
RS
RS+V
COMMON
POWER
LO FAN
COMPRESSOR
REVERSING
VALVE
AUX HEAT
HIGH FAN
DEFROST
Sample Wiring Diagrams
H2
G2
3 conductor 18 gage
unshielded cable from
the thermostat to the
RS+5
remote sensor.
RS
RS GND
RS-GND
RS
RS+V
COMMON
24 v POWER
LO FAN
COMPRESSOR
AUX HEAT
HIGH FAN
NOTE: For cooling only, the H2 connection is not required.
Copyright 2004 Bryant Heating & Cooling Systems
HEAT PUMP
O
Y
G1
H1
CK1
CK2
R
C
8 Conductor 18 gage
unshielded cable from the
thermostat to the equipment.
HEAT-COOL/
COOLING ONLY
O
Y
G1
H1
CK1
CK2
R
C
8 Conductor 18 gage
unshielded cable from the
thermostat to the equipment.
STEP #3
A. Turn the power on to the HVAC (heating, ventilation,
and air conditioning) system.
B. Press the MODE button until the HEAT icon appears
on the display. Press the Up or Down buttons until the
set temperature is 10 degrees above room tempera-
ture. The unit should turn on and supply heat.
C. Press the MODE button until the COOL icon appears
on the display. Press the Up or Down buttons until the
set temperature is 10 degrees below room tempera-
ture. The unit should turn on.
NOTE: Most equipment has a time delay between cy-
cles. This feature is defeatable on the thermostat.
Consult the Owner's Manual under Setup: Cycles per
hour.
D. Press the MODE button repeatedly until OFF is dis-
played on the thermostat.
TROUBLESHOOTING
SYMPTOM
When not using a com-
There is not enough power
mon wire the air condi-
available to "power share".
tioning equipment tries
repeatedly to turn on,
but cannot. At times
the display dims or dis-
appears.
The air conditioning
The compressor timer lock-
does not attempt to
out may prevent the air
turn on.
conditioner from turning
on, for a period of time.
The display is blank.
Lack of proper power.
The air conditioning
The cooling set point is set
does not attempt to
too high.
turn on.
The heating does not
The heating set point is set
attempt to turn on.
too low.
The strip heater turns
Heat pump is incorrectly
off well before reaching
selected "on" in the
set point.
Advanced Setup.
CALIBRATION
Every thermostat is calibrated before it leaves the factory. Un-
der normal circumstances there will never be a need to recali-
brate the thermostat again. To accommodate s pecial needs ,
the thermostat may be recalibrated following these steps:
1. While holding the Mode button in, press the fan button
for 5 seconds. After all the icons in the display appear,
release the buttons.
2. Press the Up and Down arrow buttons simultaneously,
twice.
3. Press the up or down buttons until the flashing number
equals the current room temperature.
4. Press the Mode button to return to normal operation.
Printed in U.S.A.
TEST OPERATION
CAUSE
REMEDY
Connect a 270 ohm,
10 watt power resistor at
the unit as shown below.
For Problem A/C
R
H2
Y
TR300-10w
For Problem Heat
R H2
Y
TR300-10w
Consult the Owner's
Manual in the Setup sec-
tion to defeat the cycles
per hour and compressor
timeguard.
Make sure power is
turned on to the HVAC
unit and there is 24 vac
between R and H2.
If the HVAC unit is cool-
ing only, check there is
24 vac between R and C.
Press the down arrow
until the cooling set point
is 10 degrees lower than
the room temperature.
Press the up arrow until
the heating set point is
10 degrees higher than
the room temperature.
Select heat pump "off"
during Advanced Setup
programming. Consult
the Owner's Manual.
CATALOG NO. 5353-000
C
C
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