Venstar TSTATEZ User manual

Venstar Inc. 08/07
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 2 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
PROGRAMMABLE
Single Day
PROGRAMMABLE
Single Day
up to
& 2-cool
up to
& 2-cool
2-heat
2-heat
INSTALLATION
INSTRUCTIONS
INSTALLATION
INSTRUCTIONS
asy
E
Stat
Stat
residential
T H E R M O S TAT
TSTATEZ
world’s easiest
world’s easiest
PROGRAMMABLE THERMOSTAT
PROGRAMMABLE THERMOSTAT
One for All - Can Control:
- Gas / Electric
- Heat Pump
- Electric Heat
- Hydronic Systems
Non-Volatile Memory - Retains settings
in the event of a power failure
Outdoor Sensor Ready -
Compatible with the
optional wired, or wireless
Outdoor Sensor
HEAT
COOL HEAT
PUMP

Table Of Contents
Step #1: Preparation
Step #2: Remove & Replace
Old Thermostat
Step #3: Wire Connections
Step #4: Test Operation
Trouble Shooting
2
3
4
9
10
CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
P/N TSTAT1100EZ
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.
Page 1
Sample Wiring Diagrams
5
Venstar Inc. 08/07

STEP #1
PREPARATION
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.
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.
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STEP #2
REMOVE & REPLACE 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.
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STEP #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.
* C may not be used on all systems.
** 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
W1,O,B**
PowerRh, R, M, Vr, A R
C
O/B
C *
Common
Rev. Valve
Y2 Y2
W2 W2
2nd Stage Cool
2nd Stage Heat
RS+5 RS+5
Remote Sensor +5vdc
RS RS
Remote Sensor Signal
RS G GND
Remote Sensor Ground
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Sample Wiring Diagrams
Thermostat
Thermostat
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
1st stage heat circuit
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac return
fan relay
compressor relay
1st stage heat circuit
5 Wire, 1 Stage Cooling, 1 Stage Gas Heat
4 Wire, 1 Stage Cooling, 1 Stage Gas Heat
Residential Gas or Electric Heat *,
Electric Cool, split systems & package
units
Residential Gas or Electric Heat *,
Electric Cool, split systems & package
units
*If using electric heat this option must be
selected on during advanced setup.
Page 5

Sample Wiring Diagrams
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
2nd stage compressor relay
1st stage heat circuit
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
1st stage heat circuit
2nd stage heat circuit
Residential 2 Stage Cooling, with
Gas or Electric Heat*
Residential & Commercial 1 Stage Cooling,
with 2 Stage Gas or Electric Heat*
6 Wire, 2 Stage Cooling, 1 Stage Heat
6 Wire, 1 Stage Cooling, 2 Stage Heat
Thermostat
Thermostat
*If using electric heat this option must be
selected on during advanced setup.
Page 6

Sample Wiring Diagrams
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
2nd stage compressor relay
1st stage heat circuit
2nd stage heat circuit
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
reversing valve
Commercial Gas or Electric Heat *,
Electric Cool, split systems & package units
including Commercial Heat Pumps **
No auxiliary heat,
Residential Heat Pumps ,
split systems & package units
7 Wire, 2 Stage Cooling, 2 Stage Heat
5 Wire, 1 Stage Cooling, 1 Stage Heat - Heat Pump***
Thermostat
Thermostat
*** If using Residential Heat Pump, this option
must be selected on during advanced setup.
** Commercial Heat Pumps do not have
the heat pump turned on in advanced setup.
* If using electric heat, this option must
be selected on during advanced setup.
Page 7

Sample Wiring Diagram
R
C
G
Y1
Y2
W1
W2
O
E
L
RC
G
Y1
Y2 W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
1st stage heat circuit
2nd stage heat circuit
6 Wire, 1 Stage Cooling, 2 Stage Heat, Heat Pump *
Most residential split and package heat pumps
with auxiliary heat
Thermostat
* The heat pump option must be selected
on during advanced setup.
Page 8

STEP #4
TEST OPERATION
On the thermostat, press the MODE/NEXT
button repeatedly until the HEAT icon
appears on the display. Press the UP or
DOWN 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, press the MODE/NEXT
button repeatedly until the COOL icon
appears on the display. Press the UP or
DOWN button 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 the power on to the Heating/Air
Conditioning system.
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.
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TROUBLESHOOTING
R G W Y C
TR300-10w
R G W Y C
TR300-10w
For Problem A/C For Problem Heat
SYMPTOM: When using 4 wires (R, G, W, Y),
the air conditioning equipment tries
repeatedly to turn on, but cannot. At
times the display dims or disappears.
CAUSE: There is not enough power available
to "power share".
REMEDY: Connect a 270 ohm, 10 watt power
resistor at the furnace as shown below.
SYMPTOM: The air conditioning does not
attempt to turn on.
CAUSE: The compressor timer lockout may
prevent the air conditioner from
turning on, for a period of time.
REMEDY: See page 10 of the Owner's Manual
and configure step 8 to defeat the 5-
minute compressor lockout.
SYMPTOM: The display is blank.
CAUSE: Lack of proper power.
REMEDY: Make sure power is turned on to
the furnace and there are 24vac
between R& W. If Cis used, there
needs to be 24vac between R& C.
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TROUBLESHOOTING
Page 11
SYMPTOM: When controlling a Residential Heat
Pump, cooling energizes with a demand for
heat.
CAUSE: Heat pump is not selected "YES" in the
Advanced Setup.
REMEDY: See page 9 of the Owner's Manual
and configure step 4 to enable heat pump
operation.
SYMPTOM: When calling for cooling, both
the heat and cool come on.
CAUSE: The thermostat is configured to
control a heat pump and the HVAC
system is a "conventional" (non-heat
pump) system.
REMEDY: See page 9 of the Owner's Manual
and set step 4 to "NO” to enable gas
electric operation.
4Z95
P/N 88-612
Rev. 1
C
c
F
FOR HOME OR OFFICE USE
Tested to Comply
with FCC Standards
Slimline
TSTAT1100EZ
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