PRO T751 Thermostat Installation Guide
Wiring Diagrams
Tech Settings
Technician Setup Menu
Typical 3H/2C or 2H/1C Heat Pump System
This thermostat has a technician setup menu for easy installer
configuration. To set up the thermostat for your particular application:
R
L1(HOT)
L2
RC
RH
Y
1. Hold down the + and - buttons together for 3 seconds.
2. Use the + and - buttons to modify a setting. Use the Fan button to
go back a step and use the system button to go forward a step.
3. To exit Tech Settings, press and hold the + and - button together for
3 seconds or wait 60 seconds.
C
COMPRESSOR
RELAY
C
COOL CHANGE
OVER VALVE
EMERGENCY
HEAT RELAY
O
B
W/E
G
HEAT CHANGE
OVER VALVE
Tech Setup Steps
LCD Will Show Adjustment Options
Default
W2
Y2
FAN RELAY
T
h
i
s
f
e
a
t
u
r
e
a
l
l
o
w
s
t
h
e
i
n
s
t
a
l
l
e
r
You can adjust the room
temperature display to read
up to 4˚above or below the
AUXILIARY
HEAT RELAY
to change the calibration of the
room temperature display. For
example, if the thermostat reads
70˚ and you would like it to read
72˚ then select +2.
Room
Temperature
Calibration
COMPRESSOR
RELAY 2
factory calibrated reading.
0˚F
0
CALIBRATE
The swing setting often called
“cycle rate”, “differential”or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
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
Cooling
Swing
0.5˚
0.4˚
0.5
0.5˚ above the setpoint
and turn the cooling off at
approximately 0.5˚ below
the setpoint.
COOL SWING
The swing setting often called
“cycle rate”, “differential”, or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles 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 approximate-
ly 0.5˚ below the setpoint
and turn the heating off at
0.5˚ above the setpoint.
Heating
Swing
0.4
HEAT SWING
Swing Setting Tip
Temperature swing, sometimes called differential or cycle rate, can be customized
for this individual application. For most applications choose a swing setting that is
as long as possible without making the occupants uncomfortable.
Note:
In many systems with no emergency heat relay a jumper can be installed
between W/E and W2.
9
10
Tech Settings
Tech Settings
Tech Settings
LCD Will Show Adjustment Options Default
Tech Settings
LCD Will Show Adjustment Options Default
This setting allows the thermostat
to operate a PTAC. This will allow
for multiple fan speeds selectable
in the next two tech settings.
Use the and buttons
to select ON/OFF.
Use the and buttons
2H2C
2H/1C, 2H/2C, 3H/1C, 3H/2C,
This setting allows you to select
the number of heat and cool
stages.
to select 1H/1C, 1H/2C,
PTAC Mode
OF
OFF
2
4H/2C.
SET
PTAC MODE
System
Stages
STAGES
Note: Heat and cool choices
are limited based on
2H
This setting allows you to choose
the number of fan speeds the
thermostat will control.
Use the and buttons
to select , 2 or 3.
conventional, heat pump, or
PTAC system configuration.
PTAC Fan
Speeds
1. Speeds: ON, Auto
2. Speeds: Low, High, Auto
3. Speeds: Low, Med, High,
Auto
G = Low Speed Fan
B/O = Medium Speed Fan
Y2 = High Speed Fan
2
(Only displayed if
PTAC mode is ON)
You can configure the system
switch for the particular
application. Heat - Off - Cool,
Heat - Off, Cool - Off, Heat - Off -
Cool – Auto.
Use the
or
buttons
FAN SPEEDS
until the desired application
is flashing. AUTO = (Auto
Changeover)
Heat
Off
Cool
This setting will select the
terminal for medium fan speed
operations. The selected terminal
cannot be used for reversing valve
operations when heat pump is
enabled.
Use the and buttons
to select O/B terminals.
SYSTEM SET
PTAC Medium
Fan Speed
Terminal
System Set
Off
Em.Heat
AutoCool
Note: Emergency Heat is available
in heat pump mode only.
0
0
(Only displayed
if PTAC mode is
ON and PTAC fan
speeds is set to 3)
This setting allows the system
to run Gas, Oil, Propane or any
other types of auxiliary heat. The
thermostat will default to electric
auxiliary heat in heat pump
applications.
Use the and but-
tons to select ON/OFF.
Dual Fuel
Auxiliary For
Heat Pump
MED FAN TERM
OF
When turned on the thermostat
will operate a heat pump. EM.
Heat will show as an option in the
system switch tech setting.
Use the and button to
adjust.
OFF configures the
thermostat for conventional
systems.
OFF
GAS
OFF
(Only displayed if
heat pump is set
to ON)
DUAL FUEL
Heat Pump
ON configures the
thermostat for heat pump
systems.
OFF
OF
Use and buttons to
change the setting.
Select GAS to have the system
control the fan during a call for
heat, select Electric to have the
thermostat control the fan during
a call for heat.
GAS
HEAT PUMP
Electric or Gas
Fan Operation
Swing Setting Tip
Note: If heat pump is set to “ON”this
step will not show, and will default
to ELECTRIC.
(Only displayed if
heat pump is set
to OFF)
The second stage will turn on at 2x the swing setting. The second stage will
turn off when 1x the swing is reached. For example, if the swing setting is .5
degrees for heating and the thermostat is set at 70˚F, the first stage will turn
on at approximately 69.5˚F. The second stage will turn on at 69˚F. The second
stage will turn off at 69.5˚F and the first will turn off at 70.5˚F. If the third
stage is used, it will turn on at 68.5˚F and turn off at approximately 69˚F.
FAN SET
Use the or
to turn on of off.
buttons
This feature allows the thermostat
to keep multiple stages of heat or
cool energized until the setpoint
is satisfied.
Satisfy
Setpoint
Staging
OF
(Only displayed
if there are more
than one stage of
heat or cool)
SS STAGING
11
12
| General | Details |
|---|---|
| Name | PRO T751 Thermostat Installation Guide |
| Make | Pro |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.26 MB |
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