Venstar T1700 Owner`s manual

residential
THERMOSTAT
Digital
Thermostat
T1700
1-DAY
PROGRAMMABLE
up to 2-heat
& 1-cool
HEAT
COOL
CONFIGURABLE IN SETUP:
Auto or Manual changeover
Programmable or
Non-Programmable
HEAT
PUMP
Control up to 2 Heat &
1 Cool Stages
Backlit Display & Button
Legends
Aux Heat Indicator
Outdoor Sensor Ready
Accepts EZ Programmer
Accepts Optional IR
Remote Control
Accepts Comfort Call
Phone Control Accessory
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
INSTALLATION
INSTRUCTIONS
Venstar Inc. 08/07
CAUTION
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Thermostat
T1700
c
FC
Tested to Comply
with FCC Standards
4Z95
FOR HOME OR OFFICE USE
Page i
Table of Contents
Preparation
Remove & Replace the
Old Thermostat
Wire Connections
Sample Wiring
Diagrams
Test Operation
Calibrating the
Thermostat Sensors
TroubleShooting
Page iii
1
2
3
4
5
6
7
SECTION 1
Preparation
1
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Proper installation of the thermostat will be
accomplished by following these step by step
instructions. If you are unsure about any of these
steps, call a qualified technician for assistance.
Assemble tools
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Flat Blade
Screwdriver
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Wire cutter
& Stripper
Make sure your Heater/Air Conditioner is working
properly before beginning installation of the
thermostat.
Carefully unpack the thermostat. Save the screws,
bracket, and instructions.
Turn off the power to the Heating/Air Conditioning
system at the main fuse panel. Most residential
systems have a separate breaker for disconnecting
power to the furnace.
Page 1.1
SECTION 2
Remove & Replace the Old Thermostat
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Remove the cover of the old thermostat.
If it does not come off easily check for screws.
2
Loosen the screws holding the thermostat
base or subbase to the wall, and lift away.
Disconnect the wires from the old thermostat.
Tape the ends of the wires as you disconnect
them, and mark them with the letter of the
terminal for easy reconnection to the new
thermostat.
Keep the old thermostat for reference purposes,
until your new thermostat is functioning properly.
Page 2.1
SECTION 3
Wire Connections
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If the terminal designations on your old
thermostat do not match those on the new
thermostat, refer to the chart below, or the
wiring diagrams that follow.
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3
Wire from the
old thermostat
terminal marked
Function
Install on the
new thermostat
connector marked
G or F
Fan
G
Y1, Y or C
Cooling
Y1
W1, W or H
Heating
W1/O/B
Rh, R, M, Vr, A
Power
R
C
Common
C
Rev. Valve
W1/O/B*
O/B
W2
RS+5
2nd Stage Heat
W2
Remote Sensor +5vdc
RS+5
RSGND
Remote Sensor Ground
RSGND
RS2
Remote Sensor Signal #2
RS2
* O/B is used if your system is a Heat Pump.
Page 3.1
SECTION 4
Sample Wiring Diagrams
Section 4 Contents:
4
HVAC Equipment Wiring............4.2
Installing the Outdoor Sensor....4.6
Page 4.1
6 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1st stage Gas Heat
OR
Commercial Heat Pump 1 Stage Cooling
with 2 Stage Heat
4
W2
W1/O/B
Y1
G
RS2
RS+5
R
C
RSGND
GAS
(FAN)
ELEC
HP
ELEC
GAS
(FAN)
GAS
HP
GAS
B
O
W1
B
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
W2
Y1
G
RS2
O
RS+5
R
RSGND
24 vac return
R
fan relay
G
compressor relay
W2 W1 Y1
24 vac common
C
C
1st stage heat circuit
2nd stage heat circuit
Page 4.2
6 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1st stage Electric Heat
4
W2
W1/O/B
Y1
G
RS2
RS+5
R
C
RSGND
GAS
(FAN)
ELEC
HP
ELEC
GAS
(FAN)
GAS
HP
GAS
B
O
W1
Y1
B
G
O
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
W2
RS2
RS+5
R
24 vac return
R
fan relay
G
compressor relay
W2 W1 Y1
24 vac common
C
C
1st stage heat circuit
2nd stage heat circuit
RSGND
Page 4.3
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential Heat Pump with O Reversing
Valve 1 Stage Cooling, with 2 stage Heat
4
W2
W1/O/B
Y1
G
RS2
RS+5
R
C
RSGND
GAS
(FAN)
ELEC
HP
ELEC
GAS
(FAN)
GAS
HP
GAS
B
O
W1
B
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
W2
Y1
G
RS2
O
RS+5
R
RSGND
R
Fan Relay
Reversing Valve
O
2nd stage heat circuit
W2
Compressor Relay
Y1
24 vac return
G
24 vac common
C
C
Page 4.4
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential Heat Pump with b Reversing
Valve 1 Stage Cooling, with 2 stage Heat
4
W2
W1/O/B
Y1
G
RS2
RS+5
R
C
RSGND
GAS
(FAN)
ELEC
HP
ELEC
GAS
(FAN)
GAS
HP
GAS
B
O
W1
Y1
B
G
O
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
W2
RS2
RS+5
R
R
Fan Relay
Reversing Valve
b
2nd stage heat circuit
W2
Compressor Relay
Y1
24 vac return
G
24 vac common
C
C
RSGND
Page 4.5
Installing the Outdoor Sensor
The Outdoor Sensor measures outdoor air temperature and sends this
information to the thermostat; it measures temperature with a range of
-40 to 127 F.
4
The Outdoor Sensor should be connected to the thermostat using solid
conductor CAT 5, CAT 5e, or CAT 6 type network communication cable.
This is an unshielded cable with four twisted pairs of 24 gauge solid wire;
DO NOT use stranded cable. The cable length should not exceed 250
feet. If less than 75 feet of cable is required to connect the thermostat to
the Remote Sensor, a three conductor thermostat cable (18-24 gauge)
may be used; this cable is NOT suitable for any length greater than 75
feet.
IMPORTANT: Do no use shielded wire. Do not run sensor wiring in the
same conduit as the 24VAC thermostat wiring. Electrical interference
may cause the sensor to give incorrect temperature readings.
See the Outdoor Sensor accessory for further details.
Page 4.6
SECTION 5
Test Operation
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Turn the power on to the Heating/Air Conditioning
system.
5
Press the MODE button repeatedly until the
HEAT icon appears on the display. Press the
Up or Down buttons until the set temperature is
10 degrees above room temperature. The
furnace should turn on.
Press the MODE button repeatedly until the
COOL icon appears on the display. Press the Up
or Down buttons until the set temperature is 10
degrees below room temperature. The air
conditioner should turn on. NOTE: Most
equipment has a time delay of 5 minutes between
cool cycles. This feature is defeatable on the
thermostat. Consult the Owner's Manual under
Setup, cycles per hour.
Press the UP button until the setpoint is equal to
the room temperature. Press the FAN
button to Fan On. The fan should turn on and run
continuously.
Page 5.1
SECTION 6
Calibrating the Thermostat Sensors
Under normal circumstances it will not be necessary to adjust the
calibration of the temperature and humidity sensors. If calibration is
required, please contact a trained HVAC technician to correctly
perform the following procedure.
6
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MODE
MODE
FAN
Place the thermostat in the
OFF mode.
Press and hold the MODE
button. While holding the
MODE button, press and hold
the FAN button for 5 seconds.
All icons will appear on the
display.
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Am Program On Setup
Pm StartStop
Service Filter
AUTO
OFFON
Morning
DayNight
Evening
FanOn
COOL
Outside
AUXHEAT
PRESS
THERMOSTAT SENSOR
Press the UP and DOWN buttons
at the same time twice. The
thermostat temperature will be
displayed and may be calibrated
using the UP or DOWN buttons.
TWICE
After calibration is complete, press the MODE button once to return to
normal operation.
Page 6.1
CALIBRATE
SECTION 7
TroubleShooting
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SYMPTOM: The air conditioning does not attempt to
turn on.
CAUSE: The compressor timer lockout may prevent the
air conditioner from turning on, for a period of time.
REMEDY: Consult the Owner's Manual in the Setup
section to defeat the cycles per hour and
compressor timeguard.
7
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SYMPTOM: The display is blank.
CAUSE: Lack of proper power.
REMEDY: Make sure power is turned on to the furnace
and that you have 24vac between R & W. If C is
used, 24vac between R & C.
SYMPTOM: The air conditioning does not attempt to
turn on.
CAUSE: The cooling setpoint is set too high.
REMEDY: Consult the Owner's Manual in the Setup
section to lower the cooling setpoint limit.
SYMPTOM: The heating does not attempt to turn on.
CAUSE: The heating setpoint is set too low.
REMEDY: Consult the Owner's Manual in the Setup
section to raise the heating setpoint limit.
Page 7.1
TroubleShooting
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SYMPTOM: When controlling a residential heat pump,
and asking for cooling, the heat comes on.
CAUSE: The thermostat reversing valve jumper is set
for “b”.
REMEDY: Set the reversing valve jumper for “O”. See
pages 5.4 and 5.5.
7
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SYMPTOM: When calling for cooling, both the heat
and cool come on.
CAUSE: The thermostat equipment jumper is configured
for “HP” and the HVAC unit is a Gas/Electric.
REMEDY: Set the equipment jumper for “Gas”. See
pages 5.2 and 5.3.
Page 7.2
P/N 88-596
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