Owner’s Manual
Table of Contents
Front Panel .......................................................................................2
Display..............................................................................................3
Selecting the Heat or Cool Mode ........................................................5
Basic Operation .................................................................................9
Advanced Setup ..............................................................................10
About Advanced Features & Operation .............................................16
This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference when this equipment is
operated in a commercial environment. This
equipment
generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance
with the instruction manual, may cause harmful
interference to radio communications. Operation of
this equipment in a residential area is likely to cause
harmful interference, in which case the user
will be required to correct the interference at his/her
own expense.
This Class (A) digital apparatus meets
all the requirements of the Canadian
Interference-Causing Equipment
Regulations.
Cet appareil numérique de la Classe
(A) respecte toutes les exigences du
R`eglement sur le matériel brouilleur
du Canada.
Follow Installation Instructions carefully. Disconnect
Power to the Heater/Air Conditioner before removing
the old thermostat and installing the new thermostat.
CAUTION
IMPORTANT
North American Emissions Compliance
United States Canada
© Copyright 2014, All Rights Reserved P/N 33CSSN3-FC
1
Front Panel
2
Mode Fan
AUTO
COOL
HEAT
1 Liquid Crystal Display with Thermoglow
2 Up/Down Buttons
3 Mode Button
4 Fan/Override Button
5 Heat or Cool Indicator
Heat = Red, Cool = Green
1
3
2
4 5
Display
3
1 Mode Indicators - Page 5-8
Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the cooling mode.
AUTO - Indicates the system will automatically changeover between
heat and cool modes as the temperature varies.
OFF - Indicates heating and cooling are turned o.
2 Room Temperature Display
Indicates current room temperature.
3 Desired Set Temperature - Page 9
Indicates desired room temperature(s).
4 Setup icon - Pages 10-14
Indicates the thermostat is in the advanced setup mode.
OUTSIDE
unoccupied
Fan
2
4
3
1
1
1
3
Display
4
5 Fan icon - Page 9
Indicates fan operation.
Fan = low speed
Fan = medium speed
Fan = high speed
When only the Fan icon is displayed, the fan is in the Auto mode and
will run only when necessary to heat or cool.
6 Locked icon - Page 21
Indicates keypad has been locked.
7 Outside icon - Pages 13 & 22
Indicates the temperature displayed is from the optional outside sensor.
8 Unoccupied icons - Pages 13-14
Indicates a dry contact forced Unoccupied time period is in eect.
OUTSIDE
unoccupied
Fan
5
8
6
7
Selecting the Heat or Cool Mode 4-Pipe Operation
5
Heating Only
The HEAT setting indicates the temperature
that the room has to fall to before the heating source will turn on to heat the room.
Cooling Only
The COOL setting indicates the temperature
that the room has to rise to before the cooling source will turn on to cool the room.
Heating or Cooling
AUTO will automatically select heat or cool
based on room temperature demand.
O
OFF indicates both heating and cooling are
turned o.
Press
MODE
Press
Press
MODE
MODE
Fan
Fan
Fan
Select Mode by Pressing the MODE Button
Selecting the Heat or Cool Mode 2-Pipe Operation
6
Heat Only
Step #4 = 1 in the Advanced Setup section, page 11.
Heating Only
The HEAT setting indicates the temperature
that the room has to fall to before the heating
source will turn on to heat the room.
OFF
OFF indicates both heating and cooling
are turned o.
Press
MODE
Fan
Selecting the Heat or Cool Mode 2-Pipe Operation
7
Cool Only
Step #4 = 2 in the Advanced Setup section, page 11.
Cooling Only
The COOL setting indicates the temperature
that the room has to rise to before the cooling
source will turn on to cool the room.
OFF
OFF indicates both heating and cooling
are turned o.
MODE
Press
Fan
Selecting the Heat or Cool Mode 2-Pipe Operation
8
HEAT indicates the temperature that the room
has to fall to before the heating source energizes. If the water supply is cold, this screen
and heating would be locked out.
COOL indicates the temperature that the room
has to rise to before the cooling source energizes. If the water supply is hot, this screen
and cooling would be locked out.
If step #4 = 3, this screen will not appear.
AUTO will automatically select heat or cool
based on the room temperature demand.
OFF indicates both heating and cooling are
turned o.
Note: If the water temperature is changed during
the year, the thermostat will then automatically
lock out the incorrect mode.
Press
MODE
Press
Press
MODE
MODE
Fan
Fan
Fan
Heating and/or Cooling
Step #4 = 3 in Advanced Setup (page 11), and a changeover sensor is used.
Step #4 = 4 or 5 in Advanced Setup (page 11).
Operation is the same as a 4-pipe system (page 5).
Basic Operation
9
Selecting Your Desired Temperature (adjusting the setpoints)
Fan Operation
AUTO OR PROGRAM MODE
Pressing the UP or DOWN button in Auto or Program
mode will adjust both the heat and cool set temperatures
simultaneously.
Adjust the desired set
temperature with the
buttons
Pressing the FAN button will run the fan in low, medium, or high
speed continuously (see below and page 20).
When only the Fan icon is displayed, the fan is in the Auto mode
and will run only when necessary to heat or cool (see below and
page 20).
Note: If the thermostat is placed in the O mode, the fan will de-energize (see page 5).
Fan
Fan Fan
Fan
FAN
Fan
Press
FAN
Press
FAN
Press
FAN
Press
FAN
Press
Fan
Low Speed Medium Speed High Speed Auto
Advanced Setup
10
Select Display operation:
On = Full Display
O = Minimal Display
See page 20
Press the MODE and FAN
buttons at the same time
for 10 seconds to enter
Advanced Setup screens.
NOTE: Each step # is located
at the top right corner of the
display for easy reference.
MODE FAN
Display On
Display O
Select Display operation:
1 = Single Setpoint
2 = Dual Setpoint
See page 24
Note: When Single Setpoint is selected, the heating or cooling
setpoint will always be displayed. To display the room temperature,
press and hold the MODE button for two seconds. The degree icon
will blink when the large number is displaying room temperature
and will remain solid when displaying the heating or cooling
setpoint.
Continued
Setup
Setup
ON
MODE
Press
MODE
Press
Advanced Setup
11
Select fan coil system type:
2 = 2-pipe fan coil
4 = 4-pipe fan coil
4
On
2
O
1= Heat only system
2= Cool only system
3= Heat/Cool Auto changeover
4= Heat/Cool Aux Electric
heat, Lockout Electric Heat
when Hot Water is available
5= Heat/Cool total electric
heat, no Hot Water, only Electric Heat.
Select operation when
fan is in the Auto mode:
On = continuous low speed fan
O = only energize during
a heating or cooling cycle.
See Page 20, Note #2
Continued
Setup
Setup
AUTO
MODE
Press
MODE
Press
MODE
Press
Step #4 only appears if step #3 = 2.
2-PIPE SYSTEM OPERATION
Note: #3 & #4 require accessory changeover sensor
Advanced Setup
12
Adjust the deadband
for the 1st stage
(1˚- 6˚)
See page 17
Adjust the minimum dierence
between cooling & heating setpoints.
(0˚ - 6˚)
Step #7 will not appear if step #4 = 1 or 2.
Select backlight operation:
On - Light continuously
O - Light for 8 seconds
after a button press
Select thermostat
operation in degrees
Fahrenheit or Celsius.
On
C
O
F
Setup
Setup
Setup
COOL
OFF
HEAT
MODE
Press
MODE
Press
MODE
Press
MODE
Press
Continued
Advanced Setup
13
On
NO
Unoccupied Setpoints
O
NC
O
Select sensor operation:
On - read only duct sensor
O - control to duct sensor
Select Dry Contact
Unoccupied operation:
Unoccupied - when the
Dry Contact is closed, the
thermostat will control to the
Unoccupied setpoints
O -when the Dry Contact is closed, the
thermostat will turn o.
Dry Contact
NO - Normally Open
NC - Normally Closed
See page 18
Adjust the cooling setpoint
for unoccupied periods.
(35˚ - 99˚, OF)
Setup
Setup
OUTSIDE
Setup
unoccupied
Setup
COOL
unoccupied
MODE
Press
MODE
Press
MODE
Press
Continued
Advanced Setup
14
Adjust the heating set-point
for Unoccupied periods.
(OF, 35˚ - 99˚)
Setup
HEAT
unoccupied
After programming is complete, press the
MODE and FAN buttons at the same time
for two seconds to leave the Setup screens.
If no buttons are pressed, the display will
leave the setup screens after 30 seconds.
Advanced Setup
15
Df = Factory Default Setting
Step# Description Range Df
1 Display Blanking On / Off On
2 Single or Dual Setpoint 1 / 2 2
3 2- or 4- Pipe System 2 / 4 4
4 2-Pipe System Operation 1 - 5 1
5 Fan Auto Operation On / Off Off
6 Deadband/Temp. Swing 1st Stage 1˚ - 6˚ 2˚
7 Minimum Heat/Cool Differential 0˚ - 6˚ 2˚
8 Thermoglow Backlight On / Off Off
9 Fahrenheit or Celsius F / C F
10 Read Only Duct Sensor? On / Off Off
11 Dry Contact Polarity NO / NC NO
12 Dry Contact Operation Unoccupied / Off Unoccupied
13 Unoccupied Cool Setpoint 35˚ - 99˚, OF 85˚
14 Unoccupied Heat Setpoint OF, 35˚ - 99˚ 55˚
About Advanced Features & Operation
16
1 Place the thermostat in the OFF mode.
2 Press and hold the MODE button. While
holding the MODE button, press and hold
the DOWN button for 5 seconds. All icons
will appear on the display.
3 Press the MODE button once. The thermostat
temperature will be displayed and may be
calibrated using the UP or DOWN button.
4 After calibration is complete, press the
MODE button once to save your changes
and return to normal operation.
MODE
MODE
MODE
CALIBRATION - Under normal circumstances it will not be necessary
to adjust the calibration of the temperature sensor. If calibration is
required, please contact a trained HVAC technician to correctly perform
the following procedure.
Fan
OFF
Override
AUTO
OUTSIDE
ONOFF
Locked
Setup
unoccupied
About Advanced Features & Operation
17
DEADBAND OPERATION - Controls one Heat and one Cool stage with a three
speed fan (see below).
The low speed fan for heat or cool is turned on when: The temperature
spread from the setpoint is equal to or greater than: the setpoint plus the 1st
stage dead-band (step #6, page 12). This 1st stage deadband is adjustable
from 1-6 degrees and the default is two degrees.
The medium speed fan for heat or cool is turned on when: The temperature
spread from the setpoint is equal to or greater than: the setpoint plus the 1st
stage deadband (step #6, page 12), plus the 2nd stage dead-band. This 2nd
stage deadband is xed at one degree and is not adjustable.
The high speed fan for heat or cool is turned on when: The temperature
spread from the setpoint is equal to or greater than: the setpoint plus the 1st
stage deadband (step #6, page 12), plus the 2nd stage deadband, plus the 3rd
stage deadband. This 3rd stage deadband is xed at one degree and is not
adjustable.
The above gure assumes the minimum on time for the prior stage has been
met to allow the next stage to turn on, once the deadbands have been exceeded.
TEMPERATURE
DECREAS
EI
NCREASE
Cool
SP
Heat
SP
Med-
speed
fan
Med-
speed
fan
Heating
Cooling
Lo-
speed
fan
Hi-
speed
fan
Lo-
speed
fan
Hi-
speed
fan
DB3
1˚
DB2
1˚ 1˚ 1˚
DB1
1˚-6˚1˚- 6˚
DB1 DB2DB3
About Advanced Features & Operation
18
DRY CONTACT SWITCH - This feature allows an external device such as a
Central Time Clock, Occupancy Sensor, or a Telephone activated device to
force one or more thermostats into an Unoccupied mode (steps #11 and 12,
page 13).
When the CK1 and R terminals are shorted together, and the thermostat is
programmed for Unoccupied operation (step #12, page 13), the thermostat
will be forced into Unoccupied setpoints and the Unoccupied icon will appear
on the display.
Important Note: For control of multiple thermostats by one source,
refer to ‘Potential Phasing Problems’ on page 24.
Connect wires to a time clock or
other device to force the thermostat
into Occupied 1 or Unoccupied.
C
G
R
Y1
G3
W1
TERMINAL CONNECTIONS
G2
RS
H2O
CK1
RS+5
About Advanced Features & Operation
19
FACTORY DEFAULTS - If, for any reason, you desire to return all the stored
settings back to the factory default settings, follow the instructions below.
WARNING: This will reset all Advanced Programming to the default
settings. Any information entered prior to this reset will be
permanently lost.
1 Place the thermostat in the OFF mode.
2 Press and hold the MODE button. While
holding the MODE button, press and hold
the DOWN button for 5 seconds. All icons
will appear on the display.
3 After all of the icons appear, release the
MODE and DOWN buttons. Then press and
hold the FAN button for 5 seconds.
4 After the letters Fd appear on the display
(Factory Default), release the FAN button.
Press the MODE button twice to return to
normal operation.
MODE
FAN
MODE
MODE
Fan
OFF
Override
AUTO
OUTSIDE
ONOFF
Locked
Setup
unoccupied
About Advanced Features & Operation
20
FAN OPERATION - Fan operation is available in four dierent modes:
Fan: When only the fan icon is displayed, this indicates that the fan is in
the Auto mode, will only energize during a heating or cooling cycle, and
will modulate fan speeds based on temperature demand (see page 17).
Fan
, Fan , or Fan : Pressing the FAN button will cause the low,
medium, or high speed fan icon to appear (see page 9), indicating that the
fan will run continuously. The fan will de-energize if the thermostat is
placed in the O mode or a dry contact forced unoccupied time period (see
page 18).
Notes:
1) If a Duct sensor is connected to this thermostat, then the fan should be
programmed for continuous operation (step #5, page 11). This will provide
airow over the Duct sensor and provide more accurate temperature readings.
2) If the fan is programmed for continuous operation (step #5, page 11), the
low speed fan will run continuously when the fan is in the Auto mode, but will
de-energize if the thermostat is placed in the O mode.
MINIMAL DISPLAY - When the thermostat is programmed for a minimal
display (step #1, page 10), a blank screen will appear. When a button is
pressed the full, normal display will appear for 10 seconds.
About Advanced Features & Operation
21
HEAT/COOL DIFFERENTIAL - The Heat and Cool setpoints will not be
allowed to come any closer to each other than the value set in Advanced
Setup step #7, on page 12. This minimum dierence is enforced during
Auto-changeover operation.
Note: To increase the spread between the heating and cooling setpoints
in the Auto-changeover mode press the MODE button until only the heat
setpoint is displayed; adjust to the desired setpoint. Press the MODE button
until only the cool setpoint is displayed; adjust to the desired setpoint. Press
the MODE button again to enter the Auto-changeover mode where both the
heat and cool setpoints are displayed.
KEYPAD LOCKOUT - To prevent unauthorized use of the thermostat, the
front panel buttons may be disabled. To disable, or ‘lock’ the keypad, press
and hold the MODE button. While holding the MODE button, press the UP
and DOWN buttons together. The LOCKED icon will appear on the display,
then release the buttons.
Press all three buttons
in the order outlined
above for keypad lockout
MODE
Fan
Locked
To unlock the keypad, press and hold the MODE button. While holding the
MODE button, press the UP and DOWN buttons together. The LOCKED icon
will disappear from the display, then release the buttons.
AUTO
COOL
HEAT
About Advanced Features & Operation
22
LOCKING COVER w/Tamper Proof Screws
OUTSIDE SENSOR - To view an Outside Sensor (step #10, page 13), press
and hold the FAN button for two seconds until the Outside icon appears.
If an optional outside sensor is connected, the outside temperature will
appear on the display. To exit the outside temperature display, press any
button.
About Advanced Features & Operation
23
DUCT SENSOR (P/N G100-71308305) - The
thermostat is programmed from the factory to
automatically recognize when a Duct Sensor is
connected (step #10, page 13).
The Duct Sensor measures indoor air temperature
and sends this information to the thermostat; it
measures temperature with a range of 32˚ to 99˚ F.
IMPORTANT: Do not use shielded wire. Do not
run sensor wiring in the same conduit as the
24VAC thermostat wiring. Electrical interference
may cause the sensor to give incorrect temperature readings.
See the Duct Sensor instructions for further details.
Note: If a Duct sensor is connected to this thermostat, then the fan should be
programmed for continuous operation (step #5, page 11). This will provide
airow over the Duct sensor and provide more accurate
temperature readings.
Digital Sensor
High Temp. Heat
Shrink Tubing
Plenum Rated
Cable
White
Black
Digital Sensor
Plenum Rated
Cable
White
Black
About Advanced Features & Operation
24
SINGLE SETPOINT BEHAVIOR - When congured for Single Setpoint operation (step
#2, page 10), the degree icon will blink when the large number is displaying room
temperature and will remain solid when displaying the heating or cooling setpoint.
In the Auto mode the deadband is enforced both above and below the setpoint. To
avoid short cycling, a deadband of at least two degrees is recommended (step #6,
page 12). To display the room temperature press and hold the MODE button for two
seconds. Release the MODE button to return to the normal display.
Auxiliary Input Control and Multiple HVAC Control
Potential Phasing Problems
When using the auxiliary input (CK1 & R) or controlling multiple HVAC units with a
single thermostat, it is possible to encounter transformer phasing problems that will
interfere with thermostat operation. Connecting transformers that are not phased
correctly may result in a direct short, which could damage transformers and/or the
thermostat. Phasing problems are likely if the units share a common ground with
secondary grounded transformers.
SOLUTION: If possible, phase all HVAC units together. If phasing is impractical,
isolation relays may be used to isolate the transformers. To isolate the auxiliary
input, use a separate transformer for the auxiliary control device, usually a time clock.
Connect the device to an isolation relay coil. Connect one set of isolated contacts to
each thermostat at CK1 and R. See diagram A.
Diagram A- Auxiliary Control
110vac Isolation Relay
Coil
CK 1
R
Thermostat
CK 1
R
Thermostat
CK 1
R
Thermostat
Additional relays may be used. Relay coils must be wired in parallel.
CAUTION WARNING
Printed on recycled paper.
P/N 88-1079 Rev. 1
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