Pro1 Technologies T631-2 - Page 3

Wiring Diagrams
Power supply
Jumper (not supplied) to connect GL and GH terminals.
Typical 1H/1C System: 2 Speed Fan
Wiring Diagrams
Thermostat must be set to O and B to match the changeover valve, O is the
cool changeover valve, B is the heat changeover valve.
The Aux Heat Relay is energized as the second stage of heat.
R
Y
W
C
GL
GH
COMPRESSOR
RELAY
HEAT RELAY
FAN LOW RELAY
FAN HIGH RELAY
C
R
L1
L2
Typical 1H/1C System: 1 Speed Fan
R
Y
W
C
GL
GH
HEAT RELAY
FAN RELAY
COMPRESSOR
RELAY
Typical 1H/1C Heat Pump System: 2 Speed Fan
R
Y
W
C
GL
GH
O/B
COMPRESSOR
RELAY
CHANGE OVER
VALVE
FAN LOW RELAY
FAN HIGH RELAY
C
R
L1
L2
C
R
L2
L1
Typical 2H/1C Heat Pump System: 2 Speed Fan
C
R
L2
L1
COMPRESSOR
RELAY
AUX HEAT
RELAY
FAN LOW RELAY
FAN HIGH RELAY
CHANGE OVER
VALVE
Most PTAC systems support two speed fan operation. In a single speed
fan PTAC system or conventional single speed fan system, a jumper
should be installed between GL and GH on the thermostat.
Note:
The swing setting, often called
“cycle rate”, “dierential or
“anticipation” is adjustable. A
smaller swing setting will cause
more frequent cucles and a larger
swing setting will cause fewer
cycles.
The heating swing setting is
adjustable from 0.2˚ to 2˚. For
example: A swing setting of
0.5˚ will turn the heating on at
approimately 0.5˚ below the
setpoint and turn the heating
o at approximately 0.5˚ above
the setpoint.
Heating
Swing
(SYSTEM
HEAT)
Swing Settings
Adjustment Options
Default
LCD Will Show
Cooling
Swing
(SYSTEM
COOL)
The swing setting, often called
“cycle rate”, “dierential” or
“anticipation” is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
0.8˚
The cooling swing setting is
adjustable from 0.2˚ to 2˚. For
example: A swing setting of
0.5˚ will turn the cooling on at
approximately 0.5˚ above the
setpoint and turn the cooling
o at approximately 0.5˚
below the setpoint.
08
08
Swing Setting
The second stage of Heat will turn on at 2x the swing setting. The second
stage will turn o when 1x the swing is reached. For example, if the swing
setting is 0.8˚ for heating and the thermostat is set at 70˚ F, the rst stage will
turn on at approximately 69.2˚ F. The second stage will turn on at 68.4˚F and the
rst will turn o at 70.8˚ F.
0.8˚
1. Set the thermostat system switch to the desired position (COOL or HEAT).
2. Press and hold and together for 3 seconds.
3. Use or to adjust desired swing setting. (The display reads in tenths of a degree.)
4. To exit, move system switch or wait 15 seconds.
Swing Setting
Specications
Specications
The display range of temperature ... 41˚F to 95˚F (5˚C to 35˚C)
The control range of temperature.... 44˚F to 90˚F (7˚C to 32˚C)
Load rating.................................................1 amp per terminal, 1.5 amp
maximum all terminals combined
Swing (cycle rate or dierential) ...... Heating is adjustable from 0.2˚ to 2.0˚
Cooling is adjustable from 0.2˚ to 2.0˚
Power source ...........................................18 to 30 VAC, NEC Class II, 50/60 Hz
for hardwire
Battery power from 2 AA Alkaline
batteries
Operating ambient ............................... 32˚F to +105˚F (0˚C to +41˚C)
Operating humidity .............................. 90% non-condensing maximum
Dimensions of thermostat ................. 4.7”W x 4.4”H x 1.1”D
Frequency ................................................ 916 MHz
T631-2 Thermostat