Venstar T2900SCH Installation Instructions Manual

Digital

Thermostat

commercial

SCHOOL THERMOSTAT

T2900SCH

PROGRAMMABLE

up to 3-heat

& 2-cool

Energy Saving Operation Morning Warm-up Period Programmable Override Unoccupied until button press Perfect for Classroom Operation Setpoint Limiting Security Separate Weekend/Weekday Programs 99 Days of Configuration Holiday Mode

HEAT COOL

Soft Start Capability Back-Lit Display One for All Works with Virtually All Equipment Non-Volatile Memory Keypad Lockout 3 Security Levels Remote Sensor Ready 48 Hour Clock Backup Compressor Protection Economizer Operation

HEAT PUMP

Designed Specifically for the School Environment

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.

CAUTION

NEVER PUT MORE THAN ONE JUMPER ON THE SAME MISC JUMPER BLOCK!

THIS MAY DAMAGE YOUR THERMOSTAT AND VOID YOUR WARRANTY.

MISC3

OK

NOTE: Due to variations in environmental conditions, it is not

always possible to achieve the desired humidification or dehumidification setpoint.

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 T2900SCH

Tested to Comply

c

with FCC Standards

C

F

4Z95

FOR HOME OR OFFICE USE

MISC3

Page i

Table of Contents

Preparation

Remove & Replace the Old Thermostat

Configuring the MISC Outputs

Wire Connections

Sample Wiring Diagrams

Test Operation

Calibrating the Thermostat Sensors

TroubleShooting

1 2 3 4 5 6 7 8

Page iii

SECTION 1

Preparation

1

WARMER

Proper installation of the thermostat will be

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

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

WARMER

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

Flat Blade Screwdriver

WARMER

Make sure your Heater/Air Conditioner is working

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

properly before beginning installation of the

Wire cutter & Stripper

thermostat.

WARMER

Pm

I2:00

Carefully unpack the thermostat. Save the screws,

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

bracket, and instructions.

WARMER

Pm

I2:00

74

COOL

AUTO

Turn off the power to the Heating/Air Conditioning

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

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

WARMER

Remove the cover of the old thermostat.

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

If it does not come off easily check for screws.

WARMER

Loosen the screws holding the thermostat

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

base or subbase to the wall, and lift away.

WARMER

Pm

I2:00

74

COOL

AUTO

Disconnect the wires from the old thermostat.

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

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.

WARMER

Keep the old thermostat for reference purposes

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

until your new thermostat is functioning properly.

2

Page 2.1

SECTION 3

Configuring the MISC Outputs

3

Section 3 Contents:

Configuring the Jumpers........3.2

Explanation of Jumper

Settings..................................3.3

Page 3.1

Configuring the Jumpers

For additional flexibility, your thermostat has three configurable outputs. These outputs are designed to have different functions depending on how the jumpers are set (below). Each output, labeled MISC1, MISC2, and MISC3 may be set for one of the six choices available. In the diagram below, the MISC3 jumper has been set for HUM* (humidification) operation, the MISC2 jumper has been set for DEHUM* (dehumidification) operation, and the MISC1 jumper has been set for PROG (programmable) operation.

(FAN)

PROG

DEHUM

ECON

MISC2

CKGND

HUM

W3

MISC3 MISC2 MISC1

W1

Y1

G

CK1

R

C

ELEC

GAS

HP

GAS

2

4

INSTALL HUMIDITY

1

3

B

O

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

Z

8

6

X 1

RSGND

Y

579

Y2

(MISC1 ONLY)

MODULE WITH SENSING

ELEMENT OUTWARD

W3

PROG

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

*The Humidity Module (sold separately) must be installed to operate a humidification and/or dehumidification system.

(MISC1

ONLY)

Y2

CAUTION

NEVER PUT MORE THAN

ONE JUMPER ON THE SAME

MISC JUMPER BLOCK!

DOING SO MAY DAMAGE

YOUR THERMOSTAT AND

VOID THE WARRANTY.

Page 3.2

MISC3

OK

MISC3

3

Explanation of Jumper Settings

W3 JUMPER SETTING

3

If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw terminal on the backplate will control a third stage of heat.

W3 MULTI-STAGE OPERATION EXPLAINED - SECTION 13 of the Owner’s Manual

The 3rd Stage of Heat is turned on when:

(A) The 1st and 2nd stages have been on for the time required (steps 27 and 28, page 13.6). It is adjustable from 0-60 minutes and the default

And

is two minutes. (B) The temperature from the setpoint is equal to or greater than: the set-

point plus the 1st stage deadband (step #24, 13.5), plus the 2nd stage deadband (step #25, 13.5) plus the 3rd stage deadband (step #26,

13.5). This 3rd stage deadband is adjustable from 0-10 degrees and

the default is two degrees.

3rd Stage

turn on

PROG JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to PROG, terminal on the backplate will control a pilot relay or other accessory.

Heating

Deadband Deadband DeadbandDeadbandDeadband

2nd Stage

turn on

1st Stage

turn on

DECREASE INCREASE

db 1 db 1db 2 db 2db 3

(adj. 1-6 )(adj. 0-10 )(adj. 0-10 ) (adj. 0-10 )(adj. 1-6 )

Heat

Cool

Setpoint

TEMPERATURE

PROGRAMMABLE OUTPUT - SECTION 14 of the Owner’s Manual

This jumper setting allows the MISC outputs to control a pilot relay by time, temperature, or a signal from the Internet/Phone. The following are three possible scenarios: By Time: A device that requires a start and stop time. An example of this would be an exterior lighting system that needed to be energized every day between the hours of 8pm and 1am. By Temperature: An exhaust fan that needs to energize whenever the temperature from RS2 rises above 90 degrees F. By Remote: Remotely arming a security system through the web or phone.

Page 3.3

Cooling

1st Stage

2nd Stage

turn on

the corresponding MISC screw

Explanation of Jumper Settings (continued)

HUM JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to HUM, terminal on the backplate will control a humidification system.

HUMIDIFICATION OPERATION - SECTION 9 of the Owner ’s Manual

If your HVAC unit is equipped with a humidification system and the Humidity Module (sold separately) has been installed, the thermostat will provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat when the humidity in the home falls below the humidity setpoint you have chosen. The value for this setpoint ranges from 0% to 60%. If no humidity is desired or if a humidification system has not been installed, set the value to OFF.

DEHUM JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM, terminal on the backplate will be connected to the dehumidification terminal of a furnace board. NOTE: Not all furnaces have a dehumidification terminal.

DEHUMIDIFICATION OPERATION - SECTION 10 of the Owner’s Manual

If your HVAC unit is equipped with a dehumidification system the thermostat will operate in one of two ways.

1) Normally Closed (NC): The thermostat will de-energize the MISC1, MISC2, or MISC3 terminal of the thermostat (this MISC terminal is connected to the DEHUM terminal on your furnace) to allow the fan to run in low speed when the humidity in the home is above the dehumidify setpoint you have chosen and there is a call for 1st stage cooling.

2) Normally Open (NO): The thermostat will energize the MISC1, MISC2, or MISC3 terminal of the thermostat (this MISC terminal is connected to the DEHUM terminal on your furnace) to allow the fan to run in low speed when the humidity in the home is above the dehumidify setpoint you have chosen and there is a call for 1st stage cooling.

the corresponding MISC screw

3

Page 3.4

Explanation of Jumper Settings (continued)

3

ECON JUMPER SETTING

If the jumper for MISC2 and MISC3 is set to ECON, MISC screw terminal on the backplate will be connected to an economizer.

ECONOMIZER OPERATION - If your HVAC unit is equipped with an economizer system, the thermostat will provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat when the thermostat is in an occupied time period. The MISC1, MISC2, or MISC3 terminal will be de-energized when the thermostat is in an unoccupied time period.

Y2 JUMPER SETTING

If the jumper for MISC1 is set to Y2 the second stage of cooling.

MISC1 screw terminal on the backplate will control a

Y2 OPERATION - SECTION 13 of the Owner’s Manual

Control up to two Cool stages. The 2nd Stage of heat or cool is turned on when: (A) The 1st Stage has been on for the time required (step #27, page 13.6). It is adjustable from 0-60 minutes and the default is two minutes.

And

(B) The temperature spread from the setpoint is equal to or greater than: the setpoint plus the deadband (step #24, page 13.5), plus the 2nd deadband (step #25, page 13.5). This 2nd deadband is adjustable from 0-10 degrees and the default is two degrees.

Cool

Setpoint

TEMPERATURE

Cooling

DeadbandDeadband

db 1 db 2

(adj. 0-10 )(adj. 1-6 )

1st Stage

turn on

INCREASE

the corresponding

2nd Stage

turn on

Page 3.5

SECTION 4

Wire Connections

WARMER

Pm

I2:00

74

COOL

If the terminal designations on your old thermostat

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

do not match those on the new thermostat, refer to the chart below, or the wiring diagrams that follow.

Wire from the

old thermostat

terminal marked

G or F Fan G

Y1, Y or C

W1, W or H

C

O/B

W2

MISC1

MISC2

MISC3

RS+5

RSGND

RS2 RS2

CK1

CKGND

Function

Cooling Y1

Heating

PowerRh, R, M, Vr, A R

Common

Rev. Valve

2nd Stage Heat

Configurable Output #1

Configurable Output #2

Configurable Output #3

Remote Sensor +5vdc

Remote Sensor Signal

Remote Sensor Ground

Remote Sensor Signal #2

Dry Contact Switch 1

Dry Contact Switch 2

Install on the

new thermostat

connector marked

W1/O/B

C

W1/O/B*

W2

MISC1

MISC2

MISC3

RS+5

RS+5**

RS1RS1

RS1**

RSGND

RSGND**

RS2**

CK1

CKGND

4

* O/B is used if your system is a Heat Pump. ** For instructions on connecting these terminals see page 15.2 of the Owner’s Manual.

Page 4.1

SECTION 5

Sample Wiring Diagrams

Section 5 Contents:

HVAC Equipment Wiring............5.2

5

MISC1, MISC2, and MISC3

Wiring........................................5.6

Remote Sensor and CK1-CK2

wiring for Time Clock...............5.8

Page 5.1

6 Wire, 1 Stage Cooling, 1 Stage Heat

Residential & Commercial 1 Stage Cooling, with 1st Stage Gas Heat

Commercial Heat Pump 1 Stage Cooling

OR

with 2 Stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

PROG

HUM

DEHUM

ECON

MISC2

CKGND

24 vac common

24 vac return

Fan relay

Compressor relay

1st stage heat circuit

2nd stage heat circuit

W3

MISC3 MISC2 MISC1

W1

Y1

G

CK1

R

C

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

Y2

(MISC1 ONLY)

INSTALL HUMIDITY MODULE WITH SENSING ELEMENT OUTWARD

C

R

G

Y1

W1

W2

(FAN)

6 Conductor 18 gauge

ELEC

GAS

HP

GAS

unshielded cable from the

B

O

thermostat to the equipment.

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

Page 5.2

W1/O/B

MISC2

CK1

CKGND

Y1

G

R C

6 Wire, 1 Stage Cooling, 1 Stage Heat

Residential & Commercial 1 Stage Cooling, with 1st Stage Electric Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

24 vac return

Fan relay

Compressor relay

1st stage heat circuit

2nd stage heat circuit

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

(FAN)

6 Conductor 18 gauge

ELEC

W3

PROG

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

W1

Y1

G

MISC2

CK1

CKGND

R

C

GAS

HP

GAS

unshielded cable from the

B

Y2

(MISC1

O

ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

thermostat to the equipment.

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

W1/O/B

MISC2

CK1

CKGND

Y1

G

R C

G

Y1

W1

W2

Page 5.3

6 Wire, 1 Stage Cooling, 2 Stage Heat

Residential Heat Pump with O Reversing Valve 1 Stage Cooling, with 2 Stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

PROG

HUM

DEHUM

ECON

MISC2

CKGND

24 vac common

24 vac return

Fan Relay

Compressor Relay

Reversing Valve

2nd stage heat circuit

W3

MISC3 MISC2 MISC1

W1

Y1

G

CK1

R

C

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

Y2

(MISC1 ONLY)

INSTALL HUMIDITY MODULE WITH SENSING ELEMENT OUTWARD

R C

G

Y1

O

W2

(FAN)

6 Conductor 18 gauge

ELEC

GAS

HP

GAS

unshielded cable from the

B

O

thermostat to the equipment.

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

Page 5.4

W1/O/B

MISC2

CK1

CKGND

Y1

G

R C

6 Wire, 1 Stage Cooling, 2 Stage Heat

Residential Heat Pump with b Reversing Valve 1 Stage Cooling, with 2 Stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

24 vac return

Fan Relay

Compressor Relay

Reversing Valve

2nd stage heat circuit

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

(FAN)

6 Conductor 18 gauge

ELEC

W3

PROG

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

W1

Y1

G

MISC2

CK1

CKGND

R

C

GAS

HP

GAS

unshielded cable from the

B

Y2

(MISC1

O

ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

thermostat to the equipment.

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

W1/O/B

MISC2

CK1

CKGND

Y1

G

R C

G

Y1

b

W2

Page 5.5

Adding a (MISC1), Exterior Lighting

2nd Stage of Cooling

System (MISC2), and 3rd Stage of Heating (MISC3)

5

W3

PROG

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

3rd Stage Heat

2nd Stage Cooling

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

Exterior Lighting

W3

Y2

(MISC1

ONLY)

Page 5.6

PROG

HUM

DEHUM

ECON

MISC2

CKGND

W3

MISC3 MISC2 MISC1

W1

Y1

G

CK1

R

C

W1/O/B

MISC2

CK1

CKGND

Y2

(MISC1 ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

Y1

G

R C

(FAN) ELEC

GAS

HP

GAS

B

O

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

Adding a Humidification System* (MISC1), Dehumidification System* (MISC2), and controlling an Economizer (MISC3).

5

W3

PROG

HUM

DEHUM

ECON

MISC3 MISC2

Economizer

MISC1

Dehumidification System

Humidification System

* Requires Humidity Module.

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

(MISC1

ONLY)

W3

PROG

HUM

DEHUM

ECON

Y2

(MISC1

MISC3 MISC2 MISC1

ONLY)

W1

Y1

G

MISC2

CK1

CKGND

R

C

Y2

Page 5.7

INSTALL HUMIDITY MODULE WITH SENSING ELEMENT OUTWARD

HUM

NO HUM

2

8

4

6

X 1

1

3

579

W1/O/B

MISC2

CKGND

(FAN) ELEC

GAS

HP

GAS

B

O

W2

MISC1

RS2

MISC3

RS+5

Z

RS1

RSGND

Y

Humidity Module

Y1

G

CK1

R

C

HUM

NO HUM

(Sold Separately)

2

8

4

6

X 1

1

3

579

Z

Y

CK1 and CK2 terminals wired to a Time Clock

For instructions on wiring the optional Remote and Outdoor Sensors, please see page 15.2 of the Owner’s Manual

5

W2 MISC1 RS2 MISC3 RS+5 RS1 RSGND

12

11 10

9

8

7

DRY CONTACT SWITCH - The terminals are ‘normally open’ (may be programmed for normally closed operation, see page 16.2 of the Owner’s Manual). Closing or completing the circuit will cause the thermostat to do one of the following:

1) If Occupied 1 is selected in step #41 of the Advanced Setup (see page 16.4 of Owner’s Manual), when the dry contact is energized the thermostat will be forced into Occupied 1 setpoints (see Section 6 of Owner’s Manual).

2) If Service Pan is selected, when the dry contact is energized the thermostat will lockout Y1 (compressor) and write Service Pan on the display.

Page 5.8

W1/O/B

Y1

G

MISC2

CK1

CKGND

R C

1

2

3

4

5

6

SECTION 6

Test Operation

WARMER

Turn the power on to the Heating/Air Conditioning

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

system.

WARMER

Pm

I2:00

74

COOL

Press the MODE button repeatedly until the

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

6

Pm

I2:00

74

AUTO

72

Push to Start

Push and hold 5 seconds

for shutdown

Pm

I2:00

74

AUTO

72

Push to Start

Push and hold 5 seconds

for shutdown

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.

WARMER

COOL

Press the MODE button repeatedly until the

HEAT

COOLER

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.

WARMER

COOL

Press the UP button until the setpoint is equal to

HEAT

COOLER

the room temperature. Press the FAN button to Fan On. The fan should turn on and run continuously.

the

Press the UP

NOTE: Due to the Random Start feature, outputs may not energize for up to 30 seconds when the thermostat is first powered (see page 16.4 of the Owner’s Manual)

Page 6.1

SECTION 7

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.

Pm

I2:00

Su

OFF

MODE

Place the thermostat in the OFF mode.

72

and hold the MODE

MODE

FAN

PRESS

TWICE

Press the MODE button once. The

MODE

remote sensor temperature will be displayed and may be calibrated using the UP or DOWN buttons. If a remote sensor is not installed, only dashes will appear.

Press the MODE button once. The relative humidity at the thermostat will be displayed and may be calibrated using the UP or DOWN buttons.

After calibration is complete, press the MODE button twice to return to normal operation.

Press button. While holding the MODE button, press and hold the FAN button for 5 seconds. All icons will appear on the display.

THERMOSTAT SENSOR

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.

REMOTE SENSOR

HUMIDITY SENSOR

DOWN

I8:88

SuMoTuWeThFrSa

Service Filter

Pan UV Light

AUTO

OFFON

Unoccupied

123

Override

FanOn

I88

Page 7.1

Am Pm

Program On

StartStop

DeHumidify

Outside

Setup

HI

88

COOL

Outside

Remote

AUXHEAT

LO

88

CALIBRATE

7

SECTION 8

TroubleShooting

SYMPTOM: The air conditioning does not attempt to

WARMER

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

turn on.

Push to Start

Push and hold 5 seconds

for shutdown

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.

8

SYMPTOM: The display is blank.

WARMER

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

CAUSE: Lack of proper power.

Push to Start

Push and hold 5 seconds

for shutdown

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.

WARMER

SYMPTOM: The air conditioning does not attempt to

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

turn on.

for shutdown

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.

WARMER

Pm

I2:00

74

COOL

AUTO

HEAT

72

COOLER

CAUSE: The heating setpoint is set too low.

Push to Start

Push and hold 5 seconds

for shutdown

REMEDY: Consult the Owner's Manual in the Setup section to raise the heating setpoint limit.

NOTE: Due to the Random Start feature, outputs may not energize for up to 30 seconds when the thermostat is first powered (see page 16.4 of the Owner’s Manual)

Page 8.1

TroubleShooting

WARMER

Pm

I2:00

SYMPTOM: When controlling a residential heat pump,

74

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

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.

WARMER

Pm

I2:00

74

SYMPTOM: When calling for cooling, both the heat

COOL

AUTO

HEAT

72

COOLER

Push to Start

Push and hold 5 seconds

for shutdown

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.

NOTE: Due to the Random Start feature, outputs may not energize for up to 30 seconds when the thermostat is first powered (see page 16.4 of the Owner’s Manual)

Page 8.2

P/N 88-588 Rev. 1

8