Venstar T1100FS 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.
residential
HEAT
COOL HEAT
PUMP
PROGRAMMABLE
7-Day
PROGRAMMABLE
7-Day
up to
& 2-cool
up to
& 2-cool
2-heat
2-heat
THERMOSTAT
Back-Lit display
One For All Works with
Virtually All Equipment
Non-Volatile memory
Keypad lockout
Single or Dual setpoint
with Adjustable Deadband
‘O’ or ‘B’ Terminal
Optional: Outdoor Sensor
Programmable Fan
Mounts Flush with the Wall
Thermostat
Thermostat
Digital
Digital T1100FS
Control up to 2 Heat & 2 Cool Stages
7-Day Programmable
4 Settings/Day
Auto Changeover
5 minute Built-In
Compressor Protection
Self-Prompting Programming
with Copy Command
Display Either F or C
INSTALLATION
INSTRUCTIONS
INSTALLATION
INSTRUCTIONS

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
12
13
CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
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.
P/N T1100FS
Venstar Inc. 08/07
Page 1

*‘Mud rings’ or Remodel boxes will not fit.
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.
Assemble tools & recommended
Junction Box*.
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, wall anchors, and
instructions.
STEP #1
PREPARATION
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.
EXTENDS
LESS THAN
3/8” FROM
THE WALL.
FLATSTAT
.366”
FlatStat
in Small
J-Box
WALL
WALL
Page 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.
STEP #2
REMOVE & REPLACE OLD THERMOSTAT
Keep the old thermostat for reference
purposes, until your new thermostat is
functioning properly.
Remove the white plastic wire connector
from the rear of the thermostat. Install
wires as directed. Press the wired
connector on the back of the thermostat.
Lift Connector straight up
to remove.
For best operation, install
the thermostat in a junction
box that is free from drafts
that originate inside the wall.
Page 3

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 thermos tat
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
Page 4

Sample Wiring Diagrams
*If using first stage electric heat, this option must be
selected ON (see page 13, step 5 of Owner’s Manual).
Gas or Electric Heat
5 Wire, 1 Stage Cooling, 1 Stage Gas Heat Residential Gas or Electric Heat*,
Electric Cool, split systems & package
units
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
YW
GAS VALVE
or
STRIP HEAT
COMMON
C
FAN
G
Page 5

Sample Wiring Diagrams
Gas or Electric Heat
4 Wire, 1 Stage Cooling, 1 Stage Gas Heat Residential Gas or Electric Heat*,
Electric Cool, split systems & package
units
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
YW
GAS VALVE
or
STRIP HEAT
FAN
G
*If using first stage electric heat, this option must be
selected ON (see page 13, step 5 of Owner’s Manual).
Page 6

Sample Wiring Diagrams
Gas or Electric Heat
6 Wire, 2 Stage Cooling, 1 Stage Gas Heat Residential two stage cooling with
Gas or Electric Heat*.
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
YW
GAS VALVE
or
STRIP HEAT
COMMON
C
FAN
G
2nd STAGE
COOLING
Y2
*If using first stage electric heat, this option must be
selected ON (see page 13, step 5 of Owner’s Manual).
Page 7

Sample Wiring Diagrams
Gas or Electric Heat
6 Wire, 1 Stage Cooling, 2 Stage Heat Residential & commercial 1 Stage Cooling,
with 2 Stage Gas or Electric Heat*
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
YW
GAS VALVE
or
STRIP HEAT
COMMON
C
FAN
G
2nd STAGE
HEATING
W2
*If using first stage electric heat, this option must be
selected ON (see page 13, step 5 of Owner’s Manual).
Page 8

Commercial Gas or Electric Heat *,
Electric Cool, split systems & package units
including Commercial Heat Pumps **
Sample Wiring Diagrams
Gas or Electric Heat
7 Wire, 2 Stage Cooling, 2 Stage Heat
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
YW
GAS VALVE
or
STRIP HEAT
COMMON
C
FAN
G
2nd STAGE
HEATING
W2
*
selected ON (see page 13, step 5 of Owner’s Manual).
** Commercial heat pumps do not have the heat pump turned
ON in advanced setup (see page 12, step 3 of Owner’s Manual).
If using first stage electric heat, this option must be
2nd STAGE
COOLING
Y2
Page 9

Sample Wiring Diagrams
*This option must be selected ON during advanced setup
(see page 12, step 3 of Owner’s Manual).
** This option must be selected O or b during advanced setup
(see page 13, step 4 of Owner’s Manual).
Heat Pump
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
Y O/b
REVERSING VALVE**
COMMON
C
FAN
G
5 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump* with O or b reversing valve**.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
Page 10

Sample Wiring Diagrams
Heat Pump
CK1
GND
RS
RS+5
W2
Y2
C
G
Y1
W1-O-B
R
POWER
R
COMPRESSOR
Y O/b
REVERSING VALVE**
COMMON
C
FAN
G
6 Wire, 1 Stage Cooling, 2 Stage Heat-Heat Pump* with O or b reversing valve**.
Residential Heat Pumps, split systems & package units, with auxiliary heat.
2nd STAGE
HEATING
W2
*This option must be selected ON during advanced setup
(see page 12, step 3 of Owner’s Manual).
** This option must be selected O or b during advanced setup
(see page 13, step 4 of Owner’s Manual).
Page 11

STEP #4
TEST OPERATION
Press the MODE button repeatedly until
the HEAT icon appears on the display.
Press the UP or DOWN buttons until the set
temperature is 10 degrees above room
temperature. The HVAC unit should
energize in the heating mode.
Press the MODE button repeatedly until
the COOL icon appears on the display.
Press the UP or DOWN buttons until the set
temperature is 10 degrees below room
temperature. The HVAC unit should
Turn the power on to the Heating/Air
Conditioning system.
energize in the cooling mode.
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: Most equipment has a time delay
of 5 minutes between cool cycles. This
feature is defeatable on the thermostat
(see page 13, step 8 of Owner's Manual).
Page 12

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 250 ohm, 10 watt power
resistor at the furnace as shown below.
TROUBLESHOOTING
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 13 of the Owner's Manual
and configure step 8 to defeat the 5-
minute compressor lockout.
R G W Y C
TR300-10w
SYMPTOM: The display is blank.
CAUSE: Lack of proper power.
REMEDY: Make sure power is turned on to
the furnace and 24vac between R& W.
If Cis used, 24vac between R& C.
Page 13

SYMPTOM: When controlling a residential heat
pump, and asking for cooling, the heat
comes on.
CAUSE: Heat pump is not selected "ON" in the
Advanced Setup.
REMEDY: See page 12 of the Owner's Manual
and configure step 3 to enable heat pump
operation.
TROUBLESHOOTING
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 12 of the Owner's Manual
and set step 3 to OFF to enable gas
electric operation.
Page 14
4Z95
P/N 88-639
Rev. 1
C
c
F
FOR HOME OR OFFICE USE
Tested to Comply
with FCC Standards
FlatStat T1100FS