PRO T751 Thermostat Installation Guide
Thermostat Quick Reference
Wiring
Wiring
Getting to know your thermostat
Caution:
Electrical Hazard
If you are replacing a thermostat,
make note of the terminal
1.
Set At
2
Failure to disconnect the power
before beginning to install this
product can cause electrical shock
or equipment damage.
connections on the thermostat that
is being replaced. In some cases
the wiring connections will not be
color coded. For example, the green
wire may not be connected to the G
terminal.
COOL ON
HEAT ON
FAN ON
3
1
Loosen the terminal block screws.
Insert wires then retighten terminal
block screws.
2.
3.
Warning:
All components of the control
system and the thermostat
installation must conform to Class II
circuits per the NEC Code.
Place nonflammable insulation into
wall opening to prevent drafts.
On LHM
Auto
Em.Heat
AutoCool
STAGES
1+2+3
2 Heat 2 Cool
Conventional
System
2 Heat 1 Cool
Heat Pump
System
3 Heat 2 Cool
Heat Pump
System
Terminal
RC
7
Transformer power
(cooling)
Transformer power
(cooling)
Transformer power
(cooling)
Indicates the current room temperature
1
2 Setpoint: Displays the selected setpoint temperature.
Transformer power
(heating)
Transformer power
(heating)
Transformer power
(heating)
RH
C
System Operation Indicators: The COOL ON, HEAT ON or FAN ON will display
when the COOL, HEAT, or FAN is on. The compressor delay feature is active if these
are flashing.
3
Transformer common
Transformer common
Transformer common
Reverse Valve /
Configurable Terminal
Reverse Valve /
Reverse Valve /
Configurable Terminal
Reverse Valve /
Reverse Valve /
Configurable Terminal
Reverse Valve /
B
Low Battery Indicator: Replace batteries when this indicator is shown.
Globe: Globe is displayed if an energy efficient temperature has been selected.
O
G
Configurable Terminal
Configurable Terminal
Configurable Terminal
Fan: Indicates the current fan setting.
Fan relay
Fan relay
Fan relay
Stages: +1 will appear in the display when the first stage of heat or cool is
on. +2 will appear for the second stage of heat.
7
First stage of
First stage of
First stage of heat
Second stage of heat
First stage of cool
W/E
emergency heat
emergency heat
System: Indicates current system mode setting.
Auxiliary heat relay,
second stage of heat
Auxiliary heat relay,
third/fourth stage of heat
W2
Y
First stage of heat & cool First stage of heat & cool
Important
The low battery indicator is displayed when the AA battery power is low. If the user
fails to replace the battery within 21 days, the screen will only show the low battery
indicator but maintain all functionality. If the user fails to replace the batteries after
an additional 21 days (days 22-42 since first “low battery”display) the setpoints will
change to 55˚F (Heating) and 85˚F (Cooling). If the user adjusts the setpoint away from
either of these, it will hold for 4 hours then return to either 55˚F or 85˚F. After day 63
the batteries must be replaced immediately to avoid freezing or overheating because
the thermostat will shut the unit off until the batteries are changed.
Second stage of cool
& second stage of heat
Second stage of cool
N/A
Y2
5
6
Wiring Diagrams
Wiring Tips
Wiring Diagrams
Note: This thermostat is
hardwire powered when the
24V transformer is
connected to the Common
and RC terminals of the
thermostat.
C Terminal
Wire Specifications
Use shielded or non-shielded
18-22 gauge thermostat wire.
Note: In many systems
with no emergency heat
relay a jumper can be
used between E and W2.
The C (common wire) terminal does
not have to be connected when the
thermostat is powered by batteries.
Installation Tip: Do not overtighten terminal block screws, as this
can damage the terminal block. A damaged terminal block can
keep the thermostat from fitting on the subbase correctly or cause
system operation issues. Max Torque = 6in-lbs.
Typical 2H/2C System: 1 Transformer
R
L1(HOT)
L2
Power supply
RC
RH
Y
C
Factory - installed jumper. Remove only when installing on a 2 transformer systems.
Use either O or B terminals for changeover valve.
COMPRESSOR
RELAY
C
W/E
G
HEAT RELAY
FAN RELAY
Optional 24 VAC common connection when thermostat is used in battery power mode.
W2
Y2
Typical Cool-Only System With Fan
HEAT RELAY 2
R
COMPRESSOR
RELAY 2
L1(HOT)
L2
RC
RH
Y
C
COMPRESSOR
RELAY
Typical 2H/2C System: 2 Transformer
C
W/E
G
R
C
REMOVE JUMPER
FAN RELAY
L1(HOT)
L2
RC
R
C
L1(HOT)
RH
Typical Heat Only System With Fan
COMPRESSOR
RELAY
L2
Y
C
R
C
W/E
HEAT RELAY
RC
RH
Y
L1(HOT)
L2
FAN RELAY
G
W2
Y2
HEAT RELAY 2
COMPRESSOR
RELAY 2
C
HEAT RELAY
W/E
G
FAN RELAY
7
8
| General | Details |
|---|---|
| Name | PRO T751 Thermostat Installation Guide |
| Make | Pro |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.26 MB |
(1 votes, average: 5.00 out of 5)
Loading...
PRO T755 Universal Thermostat Installation Guide
BOSCH 8750000270 Radiator Thermostat II Smart Home Radiator Thermostat Instructions
Beca BHT-12 Smart Thermostat User Manual
Sygonix 2992337 DIN Rail Mounted Heating And Cooling Thermostat User Manual
King K302PE ClearTouch Programmable Thermostat Instruction Manual
LuxPro PSPLV512d Programmable Heating Thermostat Instruction Manual
Kaysun KC-FC-XT Fan Coil Thermostat Owner’s Manual
WHITE-RODGERS 1F86-444 Non Programmable Electronic Digital Thermostat Instruction Manual
FRICO TAP16R Electronic Thermostat User Guide
INTIEL TD-3.1.1 Programmable Differential Thermostat User Manual
Aprilaire S86N MUPR Multi Stage Universal Thermostat Owner’s Manual