Specified Controls SC-T32-P Manuel utilisateur
SC-T32-P Universal Thermostat
Installation Manual
Version 3.0
O
This manual should not be left with the owner as it contains installer setup functions which, if not
correctly set, may cause damage to the HVAC equipment or seriously affect performance.
The SC-T32-P thermostat is intuitive, reliable and easy to install. Using a common sense approach to the
installation will ensure this product is installed properly and to the customer’s satisfaction. Please take
time to read and understand this manual so that installation and testing is performed in an efficient
manner.
This manual is to be used in conjunction with the supplied User Manual.
Although great care has been taken in the preparation of this manual, Specified Controls takes no
responsibility for errors or omissions contained herein. It is the responsibility of the installer to
ensure that this thermostat and the equipment connected to it operate in a safe and efficient
manner.
Due to ongoing product improvements, Specified Controls reserves the right to change the
specifications of the SC-T32-P thermostat or its components without notice.
All rights reserved.
© Specified Controls 2010.
Intellectual rights apply.
INTRODUCTION
1
1
INSTALLING THE THERMOSTAT
DISASSEMBLY
Insert a small coin (dime) in the release slot located
on the bottom of the thermostat. Gently twist the coin
to release the thermostat from the subbase. Avoid
twisting the case as this may stress the LCD or bend
the terminal connector pins. (Figure 1)
THERMOSTAT LOCATION
The SC-T32-P should be installed in a location that
represents the ambient space temperature. Do not
install the thermostat in an area where drafts are
present, near the floor, behind doors or on an external
wall. Avoid placing the thermostat in areas where the
air movement is limited, affected by direct sunlight or
other areas not typical of the temperature in the
space.
MOUNTING THE SUBBASE
When mounting the SC-T32-P, be aware that drafts
may travel down wall cavities and enter the back of
the thermostat through the control wire hole in the
wall. It is important to seal the hole to prevent any
drafts that might affect the internal temperature FIGURE 1
As with any HVAC project, careful installation is the key to a successful outcome. Time taken during
the installation process will be rewarded with fewer call-backs.
The steps required to install the SC-T32-P thermostat are as follows:
1. Read and understand this Installation Manual and Operation Manual.
2. Mount the SC-T32-P.
3. Set the 8 system switches to match the equipment application.
4. Wire the optional remote temperature sensor(s) or devices.
5. Power the thermostat.
6. Set the Advanced Installer Setup options.
7. Program and setup the SC-T32-P thermostat. (Refer to the Operation
Manual for instructions)
8. Test heating, cooling and other functions.
GETTING STARTED
2
2
Pull the control wires through the large opening in
the thermostat subbase. Next, level and mount
the subbase on the wall using the supplied
anchors and screws.
Do not over tighten the mounting screws as
the subbase may warp causing the improper
seating of the thermostat connecting pins to
the terminal blocks.
Use a properly sized screwdriver and land each
wire to its dedicated terminal.
Do not over tighten the terminal screws.
Check to ensure that all wires are landed
correctly and dressed properly to prevent any
shorts (refer to the “Typical System Wiring
Diagrams” in the manual).
(Figure 2)
Refer to Typical System Wiring Diagrams in this
manual.
INSTALLING THE THERMOSTAT
MOUNTING
HOLES
FIGURE 2
TERMINAL DESIGNATIONS
functions.
Based on the SC-T32-P slide switch configurations, some terminals have multiple output
(Figure 3)
TERMINAL DESIGNATION CHART
TERMINAL DESIGNATION
W2 Second Stage Heating or Auxiliary Heat
Y2 Second Stage Compressor
W1 First Stage Heating
O/B Reversing Valve
Y1 First Stage Compressor
G Fan Relay
R 24 Volt Hot (Jumpered to ‘24’)
24 24 Volt Hot (Jumpered to ‘R’)
24V 24 Volt Common
B Modbus Communications
A Modbus Communications
T Auxiliary Input Terminal
T Auxiliary Input Terminal
W2 Y2
W1
O/B Y1 G R 24 24C B A T T
FACTORY
JUMPER
Power Coms
Aux
FIGURE 3
3
3
When the SC-T32-P is used with dual fuel systems, an outdoor sensor is recommended for balance
point control (Model SC-T-S1). The sensor is wired to the TT terminals on the thermostat. In the
Advanced Installer Settings, set TT = OA. This configures the thermostat to receive the outdoor
temperature information. High and low balance point settings are set in the Advanced Installer
Settings. HB = OFF is the factory default high balance point setting and LB = OFF is the factory
default low balance point setting. High balance point is adjustable from OFF to 32° F - 122° F and low
balance point is adjustable from OFF to 14° F - 77° F. When the outdoor temperature rises above the
high balance point setting, only first stage heat pump will be allowed to energize. When the outdoor
temperature falls below the low balance point setting, only the auxiliary heat will be energized and the
heat pump will be locked out. Typical settings might be 30° F Low Balance Point and 55° F High
Balance Point. High and low balance point control can also be used in conventional heat pump
applications.
The high balance point must be greater than the low balance point and there should be at
least a 5° F spread between the two.
SPECIAL INSTRUCTIONS FOR DUAL FUEL APPLICATIONS
ACTIVATING THE BATTERY
. . . . . . . . . . . .
REMOVE TAB
1 2 3 4 5 6 7 8
ON
The SC-T32-P contains a 3 volt Lithium cell battery that
maintains the time of day in the event of a power failure. To
activate the battery, carefully remove the white tab. (Figure 4)
FIGURE 4
SETTING THE SYSTEM SWITCHES
. . . . . .
1 2 3 4 5 6 7 8
ON
. . . . . .
The SC-T32-P contains a set of eight system switches located
on the thermostat printed circuit board. The switches are used
to match the thermostat with the specific type of HVAC system
and user preferences. Refer to the system switch functions to
properly configure the thermostat. (Figure 5)
FIGURE 5
4
4
Sw1 - Equipment Type Switch 1 sets the equipment type.
For heat / cool equipment, set the switch to the OFF position
(factory default).
For heat pump equipment, set the switch to the ON position.
Sw2 - Equipment Stages Switch 2 sets the equipment stages.
For single stage equipment, set the switch to the OFF position
(factory default). For multi-stage equipment, set the switch to the
ON position.
SYSTEM SWITCH FUNCTIONS
Sw3 - Heat Pump Type Switch 3 is used to select conventional heat pump or dual fuel
operation.
For conventional heat pump, set the switch to the OFF position
(factory default).
For dual fuel operation, set the switch to the ON position.
Sw4 - Reversing Valve Switch 4 is used to select the heat pump reversing valve. For ‘O’
reversing valve (energize in cooling), set the switch to the OFF
position (factory default).
For ‘B’ reversing valve (energize in heating), set the switch to the
ON position.
Sw5 - Fan Switch 5 is used to configure the fan operation. For gas systems,
set the switch to OFF (factory default).
For heat pump and electric systems, set the switch to ON position.
Sw6 - Thermostat Mode Switch 6 is used to set the thermostat mode.
For non-programmable, set the switch to the OFF position
(factory default).
For programmable, set the switch to the ON position.
Sw7 - Schedules OFF = 4 schedules per day (factory default).
ON = 2 schedules per day.
Sw8 - Compressor Delay OFF = 4 minute short cycle protection (factory default).
ON = Disabled.
FACTORY DEFAULT SETTINGS
SWITCH ON/OFF FUNCTION
1 - Equipment Type OFF Heat / Cool
2 - Equipment tages OFF Single Stage
3 - Heat Pump Type OFF Conventional Heat Pump
4 - Reversing Valve OFF ‘O’ Reversing Valve
5 - Fan OFF Equipment Controls Fan
6 - Thermostat Mode OFF Non-programmable
7 - Schedules OFF 4 Schedules per Day
8 - Compressor Delay OFF 4 Minute Short Cycle Protection Enabled
5
5
HEAT OR COOL ONLY
Switch Settings
Sw1 = OFF (Heat/Cool)
Sw2 = OFF (Single Stage)
Sw3 = OFF (Not Applicable)
Sw4 = OFF (Not Applicable)
Sw5 = Equipment Type (OFF = Equipment Controls Fan - Gas)
(ON = Thermostat Control Fan - Electric)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = Application Type (OFF = Cooling Only)
(ON = Heating Only)
In Advanced Installer Menu Set FN=H for Heat Only or FN=C for Cool Only
TYPICAL SYSTEM WIRING DIAGRAMS
W2 Y2
W1
O/B Y1 G R 24 24C B A T T
HEAT 1
RELAY
FAN 1
RELAY MODBUS TT
TERMINALS
LINE24 V
COMP 1
RELAY
1 HEAT / 1 COOL
Switch Settings
Sw1 = OFF (Heat/Cool)
Sw2 = OFF (Single Stage)
Sw3 = OFF (Not Applicable)
Sw4 = OFF (Not Applicable)
Sw5 = OFF (Equipment Controls Fan)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
W2 Y2 W1
O/B Y1 G R 24 24C B A T T
HEAT 1
RELAY
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
24 V
6
6
2 HEAT / 2 COOL
Switch Settings
Sw1 = OFF (Heat/Cool)
Sw2 = ON (Multi-stage)
Sw3 = OFF (Not Applicable)
Sw4 = OFF (Not Applicable)
Sw5 = OFF (Equipment Controls Fan)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
W2
G3
Y2
G2
W1
O/B Y1 G1 R 24 24C B A T T
HEAT 1
RELAY
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
COMP 2
RELAY
HEAT 2
RELAY
24 V
TYPICAL SYSTEM WIRING DIAGRAMS
2 HEAT / 1 COOL HEAT PUMP
Switch Settings
Sw1 = ON (Heat Pump)
Sw2 = OFF (Single Stage)
Sw3 = OFF (Conventional Heat Pump)
Sw4 = Reversing Valve (OFF = ‘O’)
(ON = ‘B’)
Sw5 = ON (Thermostat Controls Fan)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
IMPORTANT: If an outdoor sensor is used and High or Low Balance Point control is required, set HB and LB in the
Advanced Installer menu.
W2 Y2 W1
O/B Y1 G R 24 24C B A T T
REV
VALVE
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
AUX
HEAT
24 V
7
7
3 HEAT / 2 COOL HEAT PUMP
Switch Settings
Sw1 = ON (Heat Pump)
Sw2 = ON (Multi-stage)
Sw3 = OFF (Conventional Heat Pump)
Sw4 = Reversing Valve (OFF = ‘O’))
(ON = ‘B’)
Sw5 = ON (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
IMPORTANT: If an outdoor sensor is used and High or Low Balance Point control is required, set HB and LB in the
Advanced Installer menu.
W2 Y2 W1
O/B Y1 G R 24 24C B A T T
REV
VALVE
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
COMP 2
RELAY
AUX
HEAT
24 V
TYPICAL SYSTEM WIRING DIAGRAMS
2 HEAT / 1 COOL DUAL FUEL
Switch Settings
Sw1 = ON (Heat Pump)
Sw2 = OFF (Single Stage)
Sw3 = ON (Dual Fuel)
Sw4 = Reversing Valve (OFF = ‘O’)
(ON = ‘B’)
Sw5 = ON (Thermostat Controls Fan)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
IMPORTANT: An outdoor sensor is used for High or Low Balance Point. Set HB and LB in the Advanced Installer menu.
W2 Y2 W1
O/B Y1 G R 24 24C B A T T
REV
VALVE
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
FOSSIL
FUEL
24 V
8
8
3 HEAT / 2 COOL DUAL FUEL
Switch Settings
Sw1 = ON (Heat Pump)
Sw2 = ON (Multi-stage)
Sw3 = ON (Dual Fuel)
Sw4 = Reversing Valve (OFF = ‘O’)
(ON = ‘B’)
Sw5 = ON (Thermostat Controls Fan)
Sw6 = User Preference (OFF = Non-Programmable)
(ON = Programmable)
Sw7 = User Preference (OFF = 4 Schedules per Day)
(ON = 2 Schedules per Day)
Sw8 = OFF (4 Minute Short Cycle Protection)
IMPORTANT: If an outdoor sensor is used and High or Low Balance Point control is required, set HB and LB in the
Advanced Installer menu.
W2 Y2 W1
O/B Y1 G R 24 24C B A T T
REV
VALVE
FAN 1
RELAY MODBUS TT
TERMINALS
LINE
COMP 1
RELAY
COMP 2
RELAY
FOSSIL
FUEL
24 V
TYPICAL SYSTEM WIRING DIAGRAMS
ENTERING THE ADVANCED INSTALLER SETTINGS MENU
The SC-T32-P contains factory defaults for all Advanced Installer Settings. Depending upon the user
and equipment application, some settings may need to be changed.
To enter the Advanced Installer Settings menu, push the O/RIDE button once, then hold it down (15
seconds) until the LCD displays LC which is the first menu item. You can move forward or backwards
through the menu by pressing the O/RIDE or PROG buttons.
Symbol Default Function
LC 00 Keypad Lockout
Programmable Mode LC=00 - All buttons are unlocked
LC=01 - All buttons are locked except ( ) ( ) buttons
LC=02 - All buttons are locked
LC 00 LC=00 - All buttons are unlocked
LC=02 - All buttons locked except ( ) ( ) buttons
LC=03 - PROG button is locked
LC=04 - All buttons are locked
ADVANCED INSTALLER SETTINGS MENU
(Sw6=ON)
(Sw6=OFF)
Non-programmable
Mode
9
9
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