Venstar T2700 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.
HEAT
COOL HEAT
PUMP
Digital
Thermostat
PROGRAMMABLE
up to 2-heat
& 2-cool
NON-
Digital
Thermostat
PROGRAMMABLE
up to 2-heat
& 2-cool
NON-
THERMOSTAT
T2700
commercial
Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Legends
Aux Heat Indicator
Dry Contact Equipped
Soft Start
Backlit Display & Button
Set Point Limiting
Remote Sensor Ready
Outdoor Sensor Ready
Accepts EZ Programmer
Accepts Optional Humidity
Module: Controls Humidification
and Dehumidification
Accepts Optional IR
Remote Control
Accepts Comfort Call
Phone Control Acessory
INSTALLATION
INSTRUCTIONS
INSTALLATION
INSTRUCTIONS

Page i
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.
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.
NEVER PUT MORE THAN ONE
JUMPER ON THE SAME MISC
JUMPER BLOCK!
THIS MAY DAMAGE YOUR
THERMOSTAT AND VOID
YOUR WARRANTY.
CAUTION
C
c
F
FOR HOME OR OFFICE USE
Tested to Comply
with FCC Standards
Thermostat T2700
4Z95
CAUTION
OK
MISC1 MISC1

8
2
1
3
6
7
4
5
Preparation
Remove & Replace the
Old Thermostat
Configuring the MISC
Outputs
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

3
Page 3.1
Section 3 Contents:
Configuring the Jumpers........3.2
Explanation of Jumper
Settings..................................3.3
SECTION 3
Configuring the MISC Outputs

3
Page 3.2
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 four 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
Y2 (second stage cooling) operation.
NEVER PUT MORE THAN
ONE JUMPER ON THE SAME
MISC JUMPER BLOCK!
DOING SO MAY DAMAGE
YOUR THERMOSTAT AND
VOID THE WARRANTY.
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
CAUTION
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
HUM NO HUM
CK1
CKGND
RS1
MISC1 MISC1

Page 3.3
3
HUMIDIFICATION OPERATION - SECTION 8 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
HUM JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to HUM,
terminal on the backplate will control a humidification system.
the corresponding MISC screw
Explanation of Jumper Settings
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.
the corresponding MISC screw
DEHUMIDIFICATION OPERATION - SECTION 9 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.

Page 3.4
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 12 of the Owner’s Manual
Explanation of Jumper Settings (continued)
The 2nd Stage of heat or cool is
(A) The 1st Stage has been on for the two minutes.
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint
12.5 of the Owner’s Manual), plus two degrees.
turned on when:
plus the 1st stage deadband (step #19, page
And
3
Cool
Setpoint
DeadbandDeadband
db 1 db 2
(adj. 0-10 )(adj. 1-6 )
1st Stage
turn on
2nd Stage
turn on
Cooling
TEMPERATURE INCREASE

4
Page 4.1
SECTION 4
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.
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
Remote Sensor Signal
CKGND Dry Contact Switch 2
RS1
RSGND Remote Sensor Ground
CK1 Dry Contact Switch 1
W2
MISC1
MISC2
MISC3
MISC1
MISC2
MISC3
RS2 Remote Sensor Signal #2
Configurable Output #1
Configurable Output #2
Configurable Output #3
* O/B is used if your system is a Heat Pump.
** For instructions on connecting these terminals see page 13.2
of the Owner’s Manual.
RS+5**
RS1**
RSGND**
CK1
CKGND
W1/O/B*
RS2**
AUTO
I2:00
Pm
HEAT
COOL
72
74

Page 5.1
Section 5 Contents:
HVAC Equipment Wiring............5.2
MISC1, MISC2, and MISC3
Wiring........................................5.6
Remote Sensor, Outdoor Sensor
and CK1-CK2 wiring for the
Time Clock................................5.8
SECTION 5
Sample Wiring Diagrams
5

HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULEWITH SENSING
ELEMENTOUTWARD
HUM NOHUM
CK1
CKGND
RS1
Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
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
MISC3
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 5.2
5

Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
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
MISC3
HP
GAS
B
O
ELEC
GAS
(FAN)
Page 5.3
5
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULEWITH SENSING
ELEMENTOUTWARD
HUM NOHUM
CK1
CKGND
RS1

Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
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
MISC3
HP
GAS
B
O
ELEC
GAS
(FAN)
Page 5.4
5
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULEWITH SENSING
ELEMENTOUTWARD
HUM NOHUM
CK1
CKGND
RS1

Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
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
MISC3
HP
GAS
B
O
ELEC
GAS
(FAN)
Fan Relay
Compressor Relay
Reversing Valve
Page 5.5
b
5
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULEWITH SENSING
ELEMENTOUTWARD
HUM NOHUM
CK1
CKGND
RS1

Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
RSGND
W2
2nd Stage Cooling
Y2
RS2
Adding a (MISC1).2nd Stage of Cooling
MISC3
Page 5.6
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
5
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
MISC3
RSGND
RS+5
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULEWITH SENSING
ELEMENTOUTWARD
HUM NOHUM
CK1
CKGND
RS1

CK1
CKGND
RS1
CK1
CKGND
RS1
Page 5.7
5
HP
GAS
B
O
ELEC
GAS
(FAN)
W1
Y1
G
R
C
MISC2
W2
MISC1
RS2
RSGND
MISC3
RS+5
PROG
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
INSTALLHUMIDITY
MODULE WITH SENSING
ELEMENTOUTWARD
1
2
4
6
8
X
Z
1
5
7
9
Y
3
HUM NOHUM
Y1
G
R
C
MISC2
W1/O/B
MISC1
RS+5
RSGND
W2
RS2
Adding a Humidification System (MISC1) and Dehumidification System (MISC2)*.
MISC3
Dehumidification
System
HUM
DEHUM
MISC3 MISC2
Y2
(MISC1
ONLY)
Humidification
System
MISC1
HUM
NO HUM
1
2
4
6
8
X
Z
1
5
7
9
Y
3
Humidity Module
(Sold Separately)
*Requires Humidity Module.

Page 5.8
5
CK1 and CK2 terminals wired to a Time Clock
Y1
G
R
C
MISC2
CK1
CKGND
W1/O/B
MISC1
RS+5
RS1
RSGND
W2
RS2
MISC3
12
11
10
9
8
765
4
3
2
1
For instructions on wiring the optional Remote and Outdoor
Sensors, please see page 13.2 of the Owner’s Manual
DRY CONTACT SWITCH - The terminals are ‘normally open’ (may be programmed for
normally closed operation, see page 14.2 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 #24 of the Advanced Setup (see page 14.3 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.

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 6.1
SECTION 6
Test Operation
6
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.
NOTE: Due to the Random Start feature, outputs may not energize for up to 30
seconds when the thermostat is first powered (see page 14.5 of the
Owner’s Manual)
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