Venstar T1700 User manual

Venstar Inc. 08/07
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
Digital
Thermostat
Digital
Thermostat
residential
T1
700
HEAT
COOL HEAT
PUMP
PROGRAMMABLE
1-DAY
PROGRAMMABLE
1-DAY
up to
& 1-cool
up to
& 1-cool
2-heat
2-heat
THERMOSTAT
CONFIGURABLE IN SETUP:
Auto or Manual changeover
Programmable or
Non-Programmable
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
INSTALLATION
INSTRUCTIONS
INSTALLATION
INSTRUCTIONS

Page i
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.
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.
CAUTION
C
c
F
FOR HOME OR OFFICE USE
Tested to Comply
with FCC Standards
Thermostat T1700
4Z95

2
1
3
6
7
4
5
Preparation
Remove & Replace the
Old Thermostat
Sample Wiring
Diagrams
Calibrating the
Thermostat Sensors
Test Operation
TroubleShooting
Page iii
Table of Contents
Wire Connections

Page 1.1
SECTION 1
Preparation
1
Assemble tools
Flat Blade
Screwdriver
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.
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.
AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
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Page 2.1
SECTION 2
Remove & Replace the Old Thermostat
2
Remove the cover of the old thermostat.
If it does not come off easily check for screws.
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.
AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
72
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AUTO
I2:00
Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
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Page 3.1
SECTION 3
Wire Connections
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.
* O/B is used if your system is a Heat Pump.
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
PowerRh, R, M, Vr, A R
C
O/B
C
Common
Rev. Valve
W2 2nd Stage Heat
RS+5 Remote Sensor +5vdc RS+5
RSGND Remote Sensor Ground RSGND
W1/O/B*
W2
RS2 RS2
Remote Sensor Signal #2
3
AUTO
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Pm
HEAT
COOL
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Page 4.1
Section 4 Contents:
HVAC Equipment Wiring............4.2
Installing the Outdoor Sensor....4.6
SECTION 4
Sample Wiring Diagrams
4

Y1
G
R
C
W1/O/B
RS+5
RSGND
W2
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
24 vac return
fan relay
compressor relay
1st stage heat circuit
W1
W2 GRC
Y1
RS2
6 Wire, 1 Stage Cooling, 1 Stage Heat
24 vac common
2nd stage heat circuit
HP
GAS
B
O
ELEC
GAS
(FAN)
Residential & Commercial 1 Stage Cooling,
with 1st stage Gas Heat
Commercial Heat Pump 1 Stage Cooling
with 2 Stage Heat
OR
Page 4.2
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
W2
RS2
RSGND
RS+5
4

HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
W2
RS2
RSGND
RS+5
Y1
G
R
C
W1/O/B
RS+5
RSGND
W2
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
24 vac return
fan relay
compressor relay
1st stage heat circuit
W1
W2 GR C
Y1
RS2
Residential & Commercial 1 Stage Cooling,
with 1st stage Electric Heat
6 Wire, 1 Stage Cooling, 1 Stage Heat
24 vac common
2nd stage heat circuit
HP
GAS
B
O
ELEC
GAS
(FAN)
Page 4.3
4

HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
W2
RS2
RSGND
RS+5
Y1
G
R
C
W1/O/B
RS+5
RSGND
W2
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
24 vac return
Fan Relay
Compressor Relay
Reversing Valve
O
W2 GR C
Y1
RS2
Residential Heat Pump with O Reversing
Valve 1 Stage Cooling, with 2 stage Heat
6 Wire, 1 Stage Cooling, 2 Stage Heat
24 vac common
2nd stage heat circuit
HP
GAS
B
O
ELEC
GAS
(FAN)
Page 4.4
4

HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
W2
RS2
RSGND
RS+5
Y1
G
R
C
W1/O/B
RS+5
RSGND
W2
6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.
24 vac return
W2 GR C
Y1
RS2
Residential Heat Pump with b Reversing
Valve 1 Stage Cooling, with 2 stage Heat
6 Wire, 1 Stage Cooling, 2 Stage Heat
24 vac common
2nd stage heat circuit
HP
GAS
B
O
ELEC
GAS
(FAN)
Fan Relay
Compressor Relay
Reversing Valve
Page 4.5
b
4

Page 4.6
4
Installing the Outdoor Sensor
See the Outdoor Sensor accessory for further details.
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.
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.

Press the MODE button repeatedly until the
COOL icon appears on the display.
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
Turn the power on to the Heating/Air Conditioning
system.
Press the MODE button repeatedly until the
HEAT icon appears on the display. Press
Up or Down buttons until the set temperature is
10 degrees above room temperature. The
furnace should turn on.
the
Page 5.1
SECTION 5
Test Operation
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.
5
AUTO
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Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
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AUTO
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Pm
HEAT
COOL
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Page 6.1
SECTION 6
Calibrating the Thermostat Sensors
After calibration is complete, press the MODE button once to return to
normal operation.
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.
MODE Place the thermostat in the
OFF mode.
FAN
MODE Press
button. While holding the
MODE button, press and hold
the FAN button for 5 seconds.
All icons will appear on the
display.
and hold the MODE
OFF
I2:00
72
Pm
Su
CALIBRATE
PRESS
TWICE
Press the UP and buttons
at the same time twice. The
thermostat temperature will be
displayed and may be calibrated
using the UP or DOWN buttons.
DOWN
THERMOSTAT SENSOR
Evening
FanOn
AUXHEAT
COOL
AUTO
OFFON
Morning
DayNight
Am
I8:88
Service Filter
Program On
StartStop
I88
Setup
Outside
Pm
88
88
6

Page 7.1
SECTION 7
TroubleShooting
7
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.
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 Cis
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.
AUTO
I2:00
Pm
HEAT
COOL
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74
AUTO
I2:00
Pm
HEAT
COOL
72
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AUTO
I2:00
Pm
HEAT
COOL
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AUTO
I2:00
Pm
HEAT
COOL
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74

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.
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.
P/N 88-596
Rev. 1
Page 7.2
TroubleShooting
7
AUTO
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Pm
HEAT
COOL
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AUTO
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Pm
HEAT
COOL
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