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
72
74
AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
72
74

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
74
AUTO
I2:00
Pm
HEAT
COOL
72
74
AUTO
I2:00
Pm
HEAT
COOL
72
74

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
I2:00
Pm
HEAT
COOL
72
74

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