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

700

HEAT

COOL HEAT

PUMP

PROGRAMMABLE

1-DAY

PROGRAMMABLE

1-DAY

up to

& 1-cool

up to

& 1-cool

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

FOR HOME OR OFFICE USE

Tested to Comply

with FCC Standards

Thermostat T1700

4Z95

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

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

HEAT

COOL

AUTO

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

Page 2.1

SECTION 2

Remove & Replace the Old Thermostat

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

HEAT

COOL

AUTO

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

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

O/B

Common

Rev. Valve

W2 2nd Stage Heat

RS+5 Remote Sensor +5vdc RS+5

RSGND Remote Sensor Ground RSGND

W1/O/B*

RS2 RS2

Remote Sensor Signal #2

AUTO

I2:00

HEAT

COOL

Page 4.1

Section 4 Contents:

HVAC Equipment Wiring............4.2

Installing the Outdoor Sensor....4.6

SECTION 4

Sample Wiring Diagrams

W1/O/B

RS+5

RSGND

6 Conductor 18 gauge

unshielded cable from the

thermostat to the equipment.

24 vac return

fan relay

compressor relay

1st stage heat circuit

W2 GRC

RS2

6 Wire, 1 Stage Cooling, 1 Stage Heat

24 vac common

2nd stage heat circuit

GAS

ELEC

GAS

(FAN)

Residential & Commercial 1 Stage Cooling,

with 1st stage Gas Heat

Commercial Heat Pump 1 Stage Cooling

with 2 Stage Heat

Page 4.2

GAS

ELEC

GAS

(FAN)

RS2

RSGND

RS+5

GAS

ELEC

GAS

(FAN)

RS2

RSGND

RS+5

W1/O/B

RS+5

RSGND

6 Conductor 18 gauge

unshielded cable from the

thermostat to the equipment.

24 vac return

fan relay

compressor relay

1st stage heat circuit

W2 GR C

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

GAS

ELEC

GAS

(FAN)

Page 4.3

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