Venstar T1035 User manual

Use with most Air Conditioning & Heating Systems including: 1 Stage
Electric Cooling & 1 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
Digital
Thermostat
Digital
Thermostat
residential
T1035
THERMOSTAT
INSTALLATION
INSTRUCTIONS
INSTALLATION
INSTRUCTIONS
Stages: 1-Heat, 1-Cool
Battery or System Powered
Back-Lit Digital Display
Fahrenheit or Celsius
Service Filter Indicator
HEAT
COOL HEAT
PUMP
PROGRAMMABLE
5+2 DAY
PROGRAMMABLE
5+2 DAY
up to
& 1-cool
up to
& 1-cool
1-heat
1-heat
Venstar Inc. 05/08
Bi-Color LED (when system powered)

Page 2
Contents Page #
Remove Old Thermostat
Safety Warnings
Preparation
Battery Replacement
Warranty
Test Operation
Troubleshooting
Wire Connections
Jumper Configuration
INSTALLATION INSTRUCTIONS
T1035

CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
Page 3
Safety Warnings
CAUTION
The two Alkaline “AA” batteries must be replaced at
least once every 12 months to ensure proper
operation. The Low Battery icon (fig. 1) will
appear on the display when it is time to replace
the batteries. If the thermostat is connected to
24v power, the batteries should still be installed, but
are not required.
When is displayed the batteries must be replaced
immediately. The manufacturer cannot be liable for
improper operation of the thermostat if the batteries are
not immediately replaced.
Annual battery replacement is especially critical in
locations subject to freezing temperatures. The
thermostat will be unable to turn on the heating system
if the batteries are exhausted.
FIG. 1
P/N 1035
INSTALLATION INSTRUCTIONS
T1035

Page 4
These tools will be required:
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 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.
Preparation
INSTALLATION INSTRUCTIONS
T1035
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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.
Remove & Replace
Old Thermostat
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INSTALLATION INSTRUCTIONS
T1035
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INSTALLATION INSTRUCTIONS
T1035
The batteries must be replaced
immediately when the thermostat
displays the low battery icon (fig.
1). If the thermostat is connected
to 24v power, the batteries should
still be installed. Installing the batteries when
system powered (24VAC) will keep the clock
running in the event of line power interruption.
Battery Replacement
FIG. 1
The batteries are easily accessible from the battery
slot located on the front of the thermostat (fig. 1). To
open the battery slot, press down on the battery
cover (fig. 1) and pull out (fig. 2).
Remove the old batteries and replace with the new
AA alkaline batteries (fig. 3).
FIG. 1 FIG. 2
Press
down
Pull out
Battery
slot
FIG. 3
Old
batteries
out
New
batteries
in
(Bottom View)
Place the bottom hook of the battery cover into the
slot and snap closed (fig. 4).
FIG. 4
Snap closed
Bottom
Hook
(Bottom View)

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INSTALLATION INSTRUCTIONS
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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
CCommon
Y1 or Y Cooling Y
W1, W or H Heating W
G or F Fan G
O/B Rev. Valve O/B
C (optional)
RC, R, M, Vr, A Power RC*
(Cooling Transformer)
RH, R, M, Vr, A Power RH*
(Heating Transformer)
*The RC and RH terminals have a factory installed jumper to control
single transformer systems. Remove this jumper to control dual
transformer systems.

Page 8
Sample Wiring Diagrams
Gas or Electric Heat
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 6) each year or when the Low Battery indicator is
displayed (page 3).
*
4 Wire, 1 Stage Cooling, 1 Stage Heating
Residential Gas or Electric Heat, Electric Cool, split systems & package units.
For jumper configuration see pages 14 and 15.
INSTALLATION INSTRUCTIONS
T1035
POWER
RW
COMPRESSOR
Y
GAS OR
ELECTRIC HEAT
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
Common wire optional*
Factory installed
jumper between
RC and RH
FAN
G
CRHYWGRC
O/B

Page 9
Sample Wiring Diagrams
Gas or Electric Heat
4 Wire, 1 Stage Cooling, 1 Stage Heating-Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
For jumper configuration see page 16.
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 6) each year or when the Low Battery indicator is
displayed (page 3).
*
INSTALLATION INSTRUCTIONS
T1035
FAN
G
POWER
RO
REVERSING VALVE
COMPRESSOR
Y
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
Factory installed
jumper between
RC and RH
CRHYWGRC
O/B
Common wire optional*

Sample Wiring Diagrams
Gas or Electric Heat
Page 10
4 Wire, 1 Stage Cooling, 1 Stage Heating-Heat Pump with B reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
For jumper configuration see page 17.
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 6) each year or when the Low Battery indicator is
displayed (page 3).
*
INSTALLATION INSTRUCTIONS
T1035
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
Factory installed
jumper between
RC and RH
FAN
G
POWER
RB
REVERSING VALVE
COMPRESSOR
Y
CRHYWGRC
O/B
Common wire optional*

Sample Wiring Diagrams
Gas or Electric Heat
Page 11
3 Wire, 1 Stage Heating
Residential Gas or Electric Heat units with a separately controlled fan.
For jumper configuration see pages 14 and 15.
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 6) each year or when the Low Battery indicator is
displayed (page 3).
*
INSTALLATION INSTRUCTIONS
T1035
FAN
G
POWER
RW
GAS OR
ELECTRIC HEAT
3 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
Factory installed
jumper between
RC and RH
CRHYWGRC
O/B
Common wire optional*

Sample Wiring Diagrams
Gas or Electric Heat
Page 12
2 Wire, 1 Stage Gas Heat
Residential Gas or Millivolt units.
For jumper configuration see page 14.
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 6) each year or when the Low Battery indicator is
displayed (page 3).
*
INSTALLATION INSTRUCTIONS
T1035
2 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
POWER
RW
GAS OR
ELECTRIC HEAT
Factory installed
jumper between
RC and RH
CRHYWGRC
O/B
Common wire optional*

Page 13
Sample Wiring Diagrams
Gas or Electric Heat
Dual Transformer 5 Wire, 1 Stage Cooling, 1 Stage Heating
Residential Gas or Electric Heat, Electric Cool, split systems & package units.
For jumper configuration see pages 14 and 15.
If a common wire is used it must be connected to the furnace common terminal.
If a common wire is not used the thermostat must be powered by two AA alkaline
batteries. These batteries must be replaced (page 6) each year or when the Low
Battery indicator is displayed (page 3).
*
INSTALLATION INSTRUCTIONS
T1035
5 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to both sets of
equipment.
5 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to both sets of
equipment.
Remove the
factory installed
jumper between
RC and RH
Heating System
FAN
GW
GAS OR
ELECTRIC HEAT
W
GAS OR
ELECTRIC HEAT
RH
POWER
HEAT
RH
POWER
HEAT
Heating System
Cooling System
COMPRESSOR
Y
RC
POWER
COOL
Cooling System
CRHYWGRC
O/B
Common wire optional*

Page 14
Jumper Configuration
*Output active depending on O/B jumper configuration - For normal
operation do not connect to equipment.
OUTPUTS
No Demand With Demand
Cooling Mode
Heating Mode
O/B* Y, G, O/B*
O/B* W, O/B*
Cooling and Gas Heating
Residential Gas, Electric Cool, split systems & package units.
Jumper #1 (J1) should be set for GAS and
Jumper #2 (J2) should be set for GAS/ELEC for
for typical gas furnace heating with electric
cooling. Jumper #3 (J3) is not used.
INSTALLATION INSTRUCTIONS
T1035
GAS
GAS/ELEC
J1
J2
PCB: 00597 Rev. AA
PCA: 00569 Rev.
O
B
GAS/ELEC
HP
GAS
ELEC/HP
BAT+
BAT-
1000
JFK
SKD
1000
JFK
SKD
1000
JFK
SKD
MODEL: T1035
082100009
C RH Y W G RC O/B
471
471
471
R16
R18
C11
D7
NNEACPJA
P4S220-5
N8 3D4
471471
471471
O
B
GAS/ELEC
HP
GAS
ELEC/HP
C RH Y
J1J2J3
J1J2J3
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Jumper Configuration
OUTPUTS
No Demand With Demand
Cooling Mode
Heating Mode
O/B* Y, G, O/B*
O/B* W,G, O/B*
*Output active depending on O/B jumper configuration - For normal
operation do not connect to equipment.
Cooling and Electric Heating
Residential Electric Heat units with a separately controlled fan.
Jumper #1 (J1) should be set for ELEC/HP and
Jumper #2 (J2) should be set for GAS/ELEC for
for typical electric heating with electric cooling.
Jumper #3 (J3) is not used.
INSTALLATION INSTRUCTIONS
T1035
ELEC/HP
GAS/ELEC
J1
J2
PCB: 00597 Rev. AA
PCA: 00569 Rev.
O
B
GAS/ELEC
HP
GAS
ELEC/HP
BAT+
BAT-
1000
JFK
SKD
1000
JFK
SKD
1000
JFK
SKD
MODEL: T1035
082100009
C RH Y W G RC O/B
471
471
471
R16
R18
C11
D7
NNEACPJA
P4S220-5
N8 3D4
471471
471471
O
B
GAS/ELEC
HP
GAS
ELEC/HP
C RH Y
J1J2J3
J1J2J3
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Jumper Configuration
Cooling and Heating - Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
Page 16
OUTPUTS
No Demand With Demand
Cooling Mode
Heating Mode
OY, G, O
-
Y G,
Y active in Heating
Jumper #1 (J1) should be set for ELEC/HP,
Jumper #2 (J2) should be set for HP,and
Jumper #3 (J3) should be set for Ofor typical
heat pump operation. Note: Thermostat does
not have Auxiliary Heat / Emergency Heat
capability.
INSTALLATION INSTRUCTIONS
T1035
O
J3
HP
J2
ELEC/HP
J1
PCB: 00597 Rev. AA
PCA: 00569 Rev.
O
B
GAS/ELEC
HP
GAS
ELEC/HP
BAT+
BAT-
1000
JFK
SKD
1000
JFK
SKD
1000
JFK
SKD
MODEL: T1035
082100009
C RH Y W G RC O/B
471
471
471
R16
R18
C11
D7
NNEACPJA
P4S220-5
N8 3D4
471471
471471
O
B
GAS/ELEC
HP
GAS
ELEC/HP
C RH Y
J1J2J3
J1J2J3
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Jumper Configuration
Cooling and Heating - Heat Pump with B reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
OUTPUTS
No Demand With Demand
Cooling Mode
Heating Mode
Y, G
BY ,G, B
Y active in Heating
Page 17
-
Jumper #1 (J1) should be set for ELEC/HP,
Jumper #2 (J2) should be set for HP,and
Jumper #3 (J3) should be set for Bfor typical
heat pump operation. Note: Thermostat does
not have Auxiliary Heat / Emergency Heat
capability.
INSTALLATION INSTRUCTIONS
T1035
B
J3
HP
J2
ELEC/HP
J1
PCB: 00597 Rev. AA
PCA: 00569 Rev.
O
B
GAS/ELEC
HP
GAS
ELEC/HP
BAT+
BAT-
1000
JFK
SKD
1000
JFK
SKD
1000
JFK
SKD
MODEL: T1035
082100009
C RH Y W G RC O/B
471
471
471
R16
R18
C11
D7
NNEACPJA
P4S220-5
N8 3D4
471471
471471
O
B
GAS/ELEC
HP
GAS
ELEC/HP
C RH Y
J1J2J3
J1J2J3
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Test Operation
On the thermostat, slide the Mode Switch
to HEAT. Press the COOLER or WARMER
button until the set temperature is 10 degrees
above room temperature. The HVAC unit
should energize in the heating mode.
Note: You may need to wait up to five minutes
for heating to energize due to the compressor
lockout feature.
On the thermostat, slide the Mode Switch
to COOL. Press the COOLER or WARMER
buttons until the set temperature is 10
degrees below room temperature. The
HVAC unit should energize in the cooling
mode. Note: You may need to wait up to five
minutes for cooling to energize due to the
compressor lockout feature.
Turn on the power to the Heating/Air
Conditioning system.
On the thermostat, slide the Mode Switch to
OFF. Slide the Fan Switch to Fan On. The
fan should turn on and run continuously.
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INSTALLATION INSTRUCTIONS
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Trouble Shooting
SYMPTOM: The slide switches on the thermostat
are very difficult to move.
CAUSE: The backplate of the thermostat is
screwed too tightly into a wall that is not
perfectly flat.
REMEDY: Loosen the screws holding the
thermostat into the wall.
SYMPTOM: The Air Conditioning does not
attempt to turn on.
CAUSE: The cooling setpoint is set too
high, the Mode Switch is not set for
Cool, or the batteries are too weak.
REMEDY: Consult the Normal Operation
section in the Owner’s Manual to:
Lower the cooling setpoint.
Correct the Mode Switch position.
Replace the batteries.
SYMPTOM: The fan does not turn on even though
the compressor has energized.
CAUSE: The Fan Switch is not completely in the
On or Auto position.
REMEDY: Slide the Fan Switch firmly into the On
or Auto position.
INSTALLATION INSTRUCTIONS
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Trouble Shooting
SYMPTOM: The Heating does not attempt
to turn on.
CAUSE: The heating setpoint is set too
high, the Mode Switch is not set for
Heat, or the batteries are too weak.
REMEDY: Consult the Normal Operation
section in the Owner’s Manual to:
Raise the heating setpoint.
Correct the Mode Switch position.
Replace the batteries.
P/N 88-634
Rev. 3
INSTALLATION INSTRUCTIONS
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4Z95