Pro1 Technologies T755WH Installation Manual page 5

Wiring
Terminal Designations on the Base Module
This thermostat is shipped from the factory to operate a conventional heating
and cooling system. This thermostat may also be configured for a heat pump
system. See the "heat pump" configuration step on page 23 of this manual to
configure the thermostat for heat pump applications.
2 Heat 2 Cool
Conventional
Terminal
System
Transformer power
RC
(cooling)
Transformer power
RH
(heating)
C
Transformer common
B
Energized in heating
O
Energized in cooling
G
Fan relay
W/E
First stage of heat
Y First stage of cool
Y2 Second stage of cool
W2 Second stage of heat
H
Humidify
D
Dehumidify
Terminal Designations on the Master Thermostat
2 Heat 2 Cool
Conventional
Terminal
System
R
24 VAC transformer power
C
transformer common
Powering the Master Thermostat
If you add indoor or outdoor remote sensors to this wireless system
you must hardwire the master thermostat.
15
Technician Setup
This thermostat has a technician setup menu for easy installer
configuration. To set up the thermostat for your particular application:
1. Press the MENU button.
2. Press and hold the technician setup button for 3 seconds. This 3
second delay is designed so that homeowners do not accidentally
access the installer settings.
3. Configure the installer options as desired using the table below.
Use the or keys to change settings and the next step
or previous step key to move from one step to another. Note: Only
press the DONE key when you want to exit the Technician Setup
options.
4. Press the DONE key to exit.
Tech Setup Steps
This feature will flash a reminder
after the elapsed run time to
remind the user to change the
Filter Change
filter. A setting of "OFF" will
Reminder
disable this feature.
This feature allows the installer
to change the calibration of the
Room
room temperature display. For
Temperature
example, if the thermostat reads
Calibration
70˚ and you would like it to read
72˚ then select +2.
This feature allows the installer
to select the minimum run
time for the compressor. For
Minimum
example, a setting of 4 will force
Compressor
the compressor to run for at
On Time
least 4 minutes every time the
compressor turns on, regardless
of the room temperature.
Keypad Lockout Note: The selected keypad lockout functionality must
be activated after exiting tech setup. If you do not perform this
procedure, all keys will function freely. To lock the keypad hold down
the and keys for 3 seconds. You will see a lock in the display. To
unlock the display hold down the
19
2 Heat 2 Cool 4 Heat 2 Cool
Heat Pump Heat Pump
System System
Transformer power Transformer power
(cooling) (cooling)
Transformer power Transformer power
(heating) (heating)
Transformer common Transformer common
Heat pump changeover Heat pump changeover
valve energized in heating valve energized in heating
Heat pump changeover Heat pump changeover
valve energized in cooling valve energized in cooling
Fan relay Fan relay
First stage of First stage of
emergency heat emergency heat
First stage of heat & cool First stage of heat & cool
Second stage of cool
Second stage of cool
& second stage of heat
Auxiliary heat relay, Auxiliary heat relay,
second stage of heat third stage of heat
Humidify Humidify
Dehumidify Dehumidify
2 Heat 2 Cool 4 Heat 2 Cool
Heat Pump Heat Pump
System System
24 VAC 24 VAC
transformer power transformer power
transformer common transformer common
LCD Will Show Adjustment Options
You can adjust the filter
OFF
change reminder from "OFF"
to 2000 hours of fan runtime
in 50 hour increments.
You can adjust the room
0
temperature display to read
up to 4˚above or below the
factory calibrated reading.
CALIbRATE
You can set the minimum
OFF
compressor run time to "OFF",
"3", "4", or "5" minutes. If 3,4
or 5 is selected, the
compressor will run for
at least the selected time
before turning off.
and keys for 3 seconds.
Wiring
Wiring Tips
C Terminal
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.
Power supply
Factory - installed jumper. Remove only when installing on a 2 transformer systems.
Use either O or B terminals for changeover valve.
Optional 24 VAC common connection when thermostat is used in
battery power mode.
Typical 2H/2C System: 1 Transformer
RC
RH
Y
C
W/E
G
W2
Y2
Note:
In many systems with no emergency heat relay a jumper can be installed
between W/E and W2.
Technician Setup
Tech Setup Steps
The compressor short cycle delay
protects the compressor from
Compressor
"short cycling". This feature will
Short Cycle
not allow the compressor to be
Delay
turned on for 5 minutes after it
was last turned off.
The swing setting often called
"cycle rate", "differential" or
"anticipation" is adjustable. A
smaller swing setting will cause
Cooling
more frequent cycles and a larger
Swing
swing setting will cause fewer
cycles.
Default
The swing setting often called
"cycle rate", "differential", or
"anticipation" is adjustable. A
smaller swing setting will cause
Heating
OFF
more frequent cycles and a larger
Swing
swing setting will cause fewer
cycles.
Keypad lockout allows you to
configure the thermostat so that
0˚F
some or all of the keys don't
Keypad
function.
Lockout
OFF
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.
Wire Specifications
Use shielded or non-shielded
18-22 gauge thermostat wire.
R
L1
(HOT)
L2
C
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
HEAT RELAY 2
COMPRESSOR
RELAY 2
LCD Will Show Adjustment Options
Selecting "ON" will not allow
ON OF
the compressor to be turned
on for 5 minutes after the
CO
last time the compressor was
on. Select "OF" to remove
this delay.
The cooling swing setting
dF
0.5
is adjustable from 0.2˚ to
2˚. For example: A swing
setting of 0.5˚ will turn the
CO
cooling on at approximately
0.5˚ above the setpoint
and turn the cooling off at
approximately 0.5˚ below
the setpoint.
The heating swing setting is
dF dF
0.5
adjustable from 0.2˚ to 2˚.
For example: A swing setting
of 0.5˚ will turn the heating
HE
on at approximately 0.5˚
below the setpoint and turn
the heating off at 0.5˚ above
the setpoint.
PA= partial keypad lockout,
which locks all the keys except
the or keys.
PA
FU= full keypad lockout,
which locks out all the keys.
See Keypad Lockout Note
16
Default
ON
0.5˚
0.4˚
PA
20