PRO T755 Universal Thermostat Installation Guide
Wiring Diagrams
Typical 2H/2C System: 2 Transformer
REMOVE JUMPER
Features
(If using programming)
Temporary and Permanent Hold Feature
When cool or heat is turned on, the thermostat will display HOLD
and RUN SCHED on the left of your screen when you press the
or button.
R
C
L1(HOT)
L2
RC
R
C
Temporary Hold: At this time if you do nothing, the temperature will
remain at this setpoint temporarily for 4 hours.
L1(HOT)
RH
COMPRESSOR
RELAY
L2
Y
C
Permanent Hold: If you press the HOLD key on the left of your
screen, you will see HOLD appear below the setpoint temperature in
the display. The thermostat will now permanently stay at this
W/E
HEAT RELAY
FAN RELAY
G
setpoint and can be adjusted using the
or
keys.
W2
Y2
HEAT RELAY 2
COMPRESSOR
RELAY 2
To Return to Running Schedule: Press the RUN SCHED button on
the left of your screen to exit either temporary or permanent hold.
Filter Change Reminder
If your installing contractor has configured the thermostat to remind
you when the air filter needs to be changed, you will see FILT in the
display when your air filter needs to be changed.
Typical 2H/1C Heat Pump System
R
C
Resetting the filter change reminder: When FILT reminder is
displayed, you should change your air filter and reset the reminder
by holding down the second button from the top left side of the
thermostat for 3 seconds.
RC
L1(HOT)
L2
RH
COMPRESSOR
RELAY
Y
C
EMERGENCY
HEAT
W/E
G
FAN RELAY
W2
O
COOL
CHANGEOVER
VALVE
B
HEAT
CHANGEOVER
VALVE
9
10
Tech Settings
Tech Settings
Tech Settings
Technician Setup Menu
LCD Will Show Adjustment Options Default
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.
This thermostat has a technician setup menu for easy installer
configuration. To set up the thermostat for your particular application:
Heating
Swing
1. Press the MENU button.
0.4˚
0.4
2. Press and hold the TECH SET button for 3 seconds. This 3
second delay is designed so that homeowners do not accidentally
access the installer settings.
HEAT SWING
3. Configure the installer options as desired using the table below.
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
or
keys to change settings and the NEXT
PTAC Mode
OF
ON
2
or PREV key to move from one step to another.
Note: Only press the DONE key when you want to exit the
Technician Setup options.
PTAC MODE
This setting allows you to choose
the number of fan speeds the
thermostat will control.
Use the and buttons
to select , 2 or 3.
4
.
P
r
e
s
s
t
h
e
D
O
N
E
k
e
y
t
o
e
x
i
t
.
PTAC Fan
Speeds
Tech Setup Steps
LCD Will Show Adjustment Options
Default
1. Speeds: ON, Auto
2. Speeds: Low, High, Auto
3. Speeds: Low, Med, High,
Auto
G = Low Speed Fan
B/O = Medieum Speed Fan
Y2 = High Speed Fan
2
(Only displayed if
PTAC mode is ON)
This feature will flash a reminder
You can adjust the filter
after the elapsed run time to
remind the user to change the
filter. A setting of “OFF”will
disable this feature.
change reminder from “OFF”
to 2000 hours of runtime in
50 hour increments.
Filter Change
Reminder
FAN SPEEDS
OFF
OF
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.
FILTER
PTAC Medium
Fan Speed
Terminal
This feature allows the installer
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.
You can adjust the room
temperature display to read
up to 4˚above or below the
Room
Temperature
Calibration
(Only displayed
if PTAC mode is
ON and PTAC fan
0
0
factory calibrated reading.
0˚F
0
CALIBRATE
speeds is set to 3)
MED FAN TERM
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
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.
Cooling
Swing
Heat Pump
ON configures the
thermostat for heat pump
systems.
OFF
OF
0.5˚
0.5
0.5˚ above the setpoint
and turn the cooling off at
approximately 0.5˚ below
the setpoint.
HEAT PUMP
COOL SWING
Swing Setting Tip
Swing Setting Tip
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.
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.
11
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| General | Details |
|---|---|
| Name | PRO T755 Universal Thermostat Installation Guide |
| Make | Pro |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.43 MB |
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