Robertshaw RS2110C Series Installation And User Manual

IMPORTANT SAFETY INFORMATION
WARNING:
Electrical Shock Hazard
352-00021-011 Rev B Turn off power at the main power source by unscrewing
the fuse or switching the circuit breaker to the OFF
Digital Non-Programmable Thermostat
position before installing, removing or cleaning this
Installation and User Manual thermostat.
Model: RS2110C and RS2210C Series
Fire and Electrical Shock Hazard
This device should be installed by a qualified service
technician with due regard for safety as improper
installation could result in a fire and electrical shock
hazard.
Fire and Electrical Shock Hazard
INSTALLATION MANUAL
This is a 24 VAC low-voltage thermostat. Do not install on
voltages higher than 30 VAC.
The information supplied here is for the mounting, wiring and switch
• Do not switch system to COOL if the temperature is below 50ºF
set up for the RS2110C and RS2210C thermostats. For programming
(10ºC). This can damage your cooling system and may cause
and operating functions, refer to the User Manual section.
personal injury.
Thank you for selecting our wall thermostat. Robertshaw products are
®
• Do not short (jumper) across terminals on the gas valve or at the
manufactured to high quality standards and are designed to provide
system control to test installation. This will damage the thermostat
years of service.
and void the warranty.
The RS2110C and RS2210C thermostats work with the following
climate control configurations: • Do not connect ground to any terminal in this unit.
• Heat Pump (No Auxiliary Heat) • All wiring must conform to local and national building and
electrical codes and ordinances.
• Heat Pump (With Auxiliary/Emergency Heat)
• Use this thermostat only as described in this manual.
• Standard Heat and Cooling Systems
CAUTION:
• One Stage Heat/Cool - RS2110C
• Read all the information in this manual before installing this
• Two Stage Heat, One Stage Cool - RS2210C
thermostat.
• Standard Heat Only Systems
• This thermostat is equipped with automatic compressor protection
• Millivolt Heat Only Systems - Floor or Wall Furnaces
to prevent damage due to short cycling or extended power
outages. The short cycle protection provides a 4 minute delay
• Standard Central Air Conditioning
between heating or cooling cycles to prevent the compressor from
• Gas or Oil Heat
being damaged.
• Electric Furnace
• The batteries must be replaced at least every 18-24 months to
• Hydronic (Hot Water) Zone Heat-2 Wires
assure proper operation. The thermostat will display a flashing low
battery when it is time to replace the batteries. The manufacturer
• Not to be Used With Split Transformer Systems
recommends inserting fresh batteries before leaving for an
The RS2110C and RS2210C thermostats will NOT work with 3-Wire
extended period.
Hydronic (Hot Water) Zone Heat 110/220 Volts. This thermostat operates
on 24 VAC power or battery power.
1 2

INSTALL BATTERIES

CHECK THERMOSTAT OPERATION

The thermostat will operate using 24 VAC or two AA batteries. When the

Fan Operation

two AA batteries are installed the thermostat will continue to run if the
If your system does not have a G terminal connection, skip to Heating
24 VAC fails.
System.
To open the door to the battery compartment, gently pull down on the
1. Turn on power to system.
sides. Install two AA batteries following the polarity as shown inside the
2. Move Fan switch to ON position. The blower should begin to
compartment. Close the door.
operate.
3. Move Fan switch to AUTO position. The blower should stop
immediately.

Heating System

1. Move System switch to HEAT mode. If the heating system has a
standing pilot, be sure to light it.
2. Press the UP arrow to adjust thermostat setting to 1˚F/1˚C above
+ - + -
room temperature. The heating system should begin to operate.
The display should show the flame icon in motion.
3. For a RS2210C system, adjust temperature setting to 3˚F/3˚C
above room temperature. If your system configuration is set for
Figure 3
auxiliary heat, the auxiliary heat system should begin to operate.
A 2 will appear by the flame icon.
When the batteries are low the thermostat will enter a low battery
mode.
4. Press the DOWN arrow to adjust the thermostat below room
Low battery mode has two levels: temperature. The heating system should stop operating.
• Level 1 - The low battery icon will be Cooling System
displayed. The thermostat will continue to
1. Move System switch to select the COOL mode.
operate. Replace the batteries as soon as
2. Press the DOWN arrow to adjust thermostat setting below room
possible.
temperature. The blower should come on immediately on high
• Level 2 - The low battery icon will flash. If 24
speed, followed by cold air circulation. The display should show
VAC is present the thermostat will continue
the snowflake icon pulsing.
to operate if the batteries are discharged
3. Press the UP arrow to adjust the temperature setting above
or removed. If 24 VAC is not present the
room temperature. The cooling system should stop operating.
thermostat is powered by batteries only and
THE SYSTEM WILL NOT OPERATE. Replace If these tests are not successful, remove the thermostat body and
batteries immediately.
check for bent pins. Check all wiring connections.
If these tests are successful the thermostat is ready to operate using
the factory defaults. To change the configuration settings, refer to
Replace batteries if leaving thermostat unattended for more than
Configuration in the User Manual section.
30 days.
Installation of the thermostat is now complete. Remove the protec-
tive mylar over the screen and check that fresh batteries are properly
installed. Close all doors.
10 11
TWO YEAR LIMITED WARRANTY
Some states do not allow the exclusion or limitation of incidental or
consequential damages, or allow limitations on how long an implied
Invensys Controls warrants to the original contractor installer, or to the
warranty lasts, so the above limitations or exclusions may not apply
original consumer user, that each new Robertshaw thermostat will be
to you. This Warranty gives you specific legal rights, and you may also
free from defects in materials and workmanship under normal use
have other rights which vary from state to state.
and service for a period of two (2) years from the date of purchase
For Warranty returns, send the thermostat, shipping prepaid and proof
(the "Warranty Period"). If any Product fails within the applicable War-
of date of purchase to:
ranty Period, Invensys Controls shall, at its option, repair or replace the
Product or credit the purchase price, provided the Product is returned
to Invensys Controls' facility or designated agent within the Warranty
Invensys Controls
Period, with transportation or postage charges prepaid and proof of
Warranty Claims Department
the date of purchase, and the Product, upon examination by Invensys
515 S. Promenade Ave.
Controls, is found not to conform to the Warranty. Cost of Product
Corona, CA 92879-1736
removal, labor, or reinstallation of new Product are not covered under
this Warranty and are not the responsibility of Invensys Controls. War-
ranty on Products, parts and/or components sold, but not manufac-
In Canada:
tured by Invensys Controls, shall be expressly limited to the warranty
Invensys Controls
terms of the manufacturer of such products, parts and/or components.
Warranty Claims Department
The above warranty does not apply to: i) batteries; ii) defects or dam-
age that result from use of the Products in any manner other than 3505 Laird Rd. Unit #14
their normal and customary manner; iii) defects or damage that result Mississauga, Ontario L5L 5Y7 Canada
from use of the Products in any manner other than in accordance with
Invensys Controls' recommendations and instructions; iv) defects or
damage which occur from misuse, alteration, accident, water, fire or
neglect; and/or v) defects due to abuse or damage such as burned
contacts, stripped threads, split castings, improper installation or
missing parts.
THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER
WARRANTIES, WHETHER EXPRESS OR IMPLIED, INCLUDING THE
IMPLIED WARRANTIES OF MERCHANTABILITY, TITLE AND
FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
INVENSYS CONTROLS BE LIABLE TO CONSUMER, CONTRACTOR OR
ANY THIRD PARTY FOR ANY CONSEQUENTIAL, INCIDENTAL, SPECIAL,
EXEMPLARY, OR PUNITIVE DAMAGES ARISING FROM OR RELATING TO
USE OF THE PRODUCT INCLUDING, BUT NOT LIMITED TO, LOSS OF
GOODWILL, LOSS OF PROFIT OR REVENUE, AND PROPERTY DAMAGE,
REGARDLESS WHETHER SUCH LOSS OR DAMAGE IS BASED IN CON-
TRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY, INDEMNITY,
PRODUCT LIABILITY, OR OTHERWISE AND EVEN IF INVENSYS CON-
TROLS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
REPAIR, REPLACEMENT, OR CREDIT OF THE PURCHASE PRICE, AS
PROVIDED HEREIN, SHALL CONSTITUTE THE SOLE REMEDIES WITH
RESPECT TO DEFECTS IN THE PRODUCTS. THE CONSUMER ASSUMES
ALL RISKS AND LIABILITY FOR INCIDENTAL AND CONSEQUENTIAL
DAMAGE RESULTING FROM INSTALLATION AND USE OF THE THERMO-
STAT.
19 20
Recycling Thermostat 3. Remove the front cover of the old thermostat. With wires still
attached, remove wallplate from the wall. If the old thermostat
This thermostat does not contain mercury. However, if this thermostat
has a wall mounting plate, remove the thermostat and the wall
is replacing a thermostat that contains mercury in a sealed tube, do
mounting plate as an assembly.
not place your old thermostat in the garbage. Contact your local waste
management authority for instructions regarding proper disposal of 4. Identify each wire attached to the old thermostat.
the thermostat. If you have any questions, call Robertshaw technical
5. Label each wire to identify which terminal it was connected to.
support at 1-800-445-8299.
6. Disconnect the wires from the old thermostat one at a time. DO
MOUNTING
NOT LET WIRES FALL BACK INTO THE WALL.
What you need:
7. Install new thermostat using the following procedures.
This thermostat includes two #8 slotted screws and two wall anchors
WARNING: Do not use on circuits exceeding specified voltage. Higher
for mounting. To install your thermostat, you should have the following
voltage will damage the control and could cause an
tools and materials.
electrical shock or fire hazard. Do not short out terminals
on gas valve or primary control to test.
• Slotted Screwdriver(s) • Small Phillips Screwdriver
Incorrect wiring will damage the thermostat and could
• Hammer • Electric Drill and 3/16" Bit
cause personal injury and/or property damage.
• Two 1.5V (AA) Alkaline
Attach Thermostat Base to Wall
Batteries (included)
1. Remove the packing material from the thermostat. Push in on
Replacing Existing Thermostat
the tab at the bottom. Gently pull the cover straight off the base.
Forcing or prying on the thermostat will cause damage to the
WARNING:
unit.
Electrical Shock Hazard
CAUTION:
Be certain all power is off to the system.
Turn off power at the main power source by unscrewing
2. Pull the wires through the hole in the base. Connect wires
the fuse or switching the circuit breaker to the OFF
beneath terminal screws on base using the table under terminal
position before installing, removing or cleaning this
connections.
thermostat.
3. Place base over the hole in wall and mark mounting hole
IMPORTANT:
locations on wall using the base as a template.
• Before removing wires from old thermostat, label each wire with
4. Move the base out of the way. Drill mounting holes.
the terminal designation it was removed from.
5. Fasten base loosely to wall, using two mounting screws. Place a
• Do not install on voltages greater than 30 VAC.
level against bottom of base, adjust until level, and then tighten
• Do not install on outside walls or in direct sunlight.
screws. Leveling is for appearance only and will not affect
1. Shut off electricity at the main fuse box until installation is
thermostat operation. If you are using existing mounting holes,
complete. Ensure that electrical power is disconnected. or if holes drilled are too large and do not allow you to tighten
base snugly, use plastic screw anchors to secure the subbase.
2. Remove old thermostat: A standard heat/cool thermostat
consists of three basic parts:
6. Push excess wire into wall and plug hole with a fire resistant
material (such as fiberglass insulation) to prevent drafts from
a. The cover - may be either a snap-on or hinge type.
affecting thermostat operation.
b. The base - remove by loosening all screws.
c. The switching subbase or adapter plate - remove by
unscrewing the mounting screws that hold it on the wall.
3 4
USER MANUAL
Battery Compartment - Open with finger from sides. Install two AA
1.5V batteries.
Thank you for selecting our wall thermostat. Robertshaw products
®
Reset Button - Press to return to factory default.
are manufactured to high quality standards and are designed to
Door Latch - Press gently on door to open/close.
provide years of service.
System Switch - Select Cool/Off/Heat.
FEATURES AND BENEFITS
Fan Switch - Set for continuous or automatic fan operation.
• Multi-Stage 2 Heat/1 Cool - RS2210C only. Operates on both
IMPORTANT:
multi-stage gas/electric furnaces and heat pumps. Please read the entire User Manual section before set-
ting your thermostat.
• New Improved Display makes viewing and setting the temperature
DISPLAY MAP
easier.
• Adjustable Temperature Differential maintains optimal customer The thermostat display will show information that is being used during
comfort. operation or programming. This illustration shows all of the display's
possibilities with an explanation.
• Worry-Free Memory Retention - RS2210C only. Maintains set point
and programmed parameters, even during power outages.
• Filter Monitor provides notice when filters need changing.
• Automatic Compressor Short Cycle Protection reduces wear and
tear of HVAC equipment with this system safeguard.
• O and B Terminals provides greater system flexibility.
• Zone System Compatible acts as a sensor within the system.
• Quick Wire Terminal Block uses sturdy wire clamps for fast and
easy installation - no wrapping around screws.
This section will describe the features and how to set up the RS2110C
and RS2210C thermostats. Installation is described in detail in the
6 5
Installation Manual section.
Figure 5
1. Used with setpoint.
LCD Display
2. Used for service reminders (e.g. CHECK HP).
3. Used for current setpoint and some configuration data.
4. HVAC mode and status. Icons blink when active. A is for Auto, 2
Down and is for second stage and E is for emergency.
Up Arrows
5. Low battery indicator.
6. Used for ambient temperature and configuration data (e.g. first
+ - + - Fan Switch
stage differential, F or C, etc.).
COMPRESSOR PROTECTION
System Switch
Battery
Reset Button Door Latch
Compartment The thermostat provides a 4 minute delay after shutting off the
heating or cooling system before it can be restarted. This feature will
Figure 4
prevent damage to your compressor caused by rapid cycling. Note
LCD Display - Shows Day, Temperature and other feature information. that this delay also applies to the heating system control. It does not
provide a delay when there are power outages.
Down and Up Arrows - Used to enter and navigate the configuration
menu and change the temperature settings.
12 13
21 22
When the thermostat is configured for heat pump, the thermostat will
Mounting Holes
always power the circulator fan on a call for heat in the Heat mode.
The ELEC/GAS switch for the 2 stage RS2210C model must be set to
match the type of auxiliary heat your system uses for proper operation
in the Emergency mode.
All wiring diagrams are for typical systems only. Refer to equipment
manufacturer's instructions for specific system wiring information.
Thermostat Terminals
Terminal Equipment to
Connect
Terminals
One Stage Model RS2110C
Figure 1 Thermostat Base
C 24 VAC common For input of 24 VAC common side of
System Switch Selection
connection transformer.
ent the thermostat is powered by
Heat Pump or Non-Heat Pump (RS2110C only)
batteries only and THE SYSTEM
WILL NOT OPERATE.
R 24 VAC + con- For input of 24 VAC hot side of
STD nection transformer runs heating and cooling
HP system.
O Energizes for heat pump cool revers-
ELEC GAS
ing valve.
B Energizes for heat pump heat revers-
ing valve.
G Indoor fan con- Energizes with Y1 and Y2.
Gas or Electric
nection Energizes with W1 and W2 if the
Figure 2 Electric/Gas Switch (Fan Option)
ELEC/GAS switch is set to electric.
The RS2110C thermostat is configured from the factory to operate a
Energizes when fan is switched to ON.
heat/cool, fossil fuel (gas, oil, etc.), forced air system. It is configured
correctly for any system that DOES NOT require the thermostat to Y1* First stage Energizes on a call for first stage of
energize the fan on a call for heat. compressor con- cooling.
nection
Energizes on a call for first stage of
The RS2210C is configured at the factory to operate an electric
heating when configured as a HP.
heat or heat-pump system that requires the thermostat to turn on
the fan on a call for heat. Locate the ELEC/GAS switch on the back
E/W1* First stage heat/ Energizes on a call for first stage
of the thermostat (see "Figure 2 Electric/Gas Switch (Fan Option)") emergency heat of heating when configured as a
and switch it to the ELEC position. This will allow the thermostat to connection Non-Heat Pump. For Heat Pump
configuration, will energize for emer-
energize the fan immediately on a call for heat.
gency heat.
Press the reset button to accept a change in the switch option.
*This thermostat can be used as a heat only or cool only thermostat.
If your system is not a heat pump system, refer to the Configuration
Therefore, it is not always necessary to use both W1 and Y1.
section in this manual. The RS2210C thermostat must be changed to
STD
a type system.
If you are unsure if the heating/cooling system requires the thermo-
stat to control the fan, contact a qualified heating and air conditioning
service person.
5 6
TEMPERATURE RANGE BATTERY WARNING
This thermostat can be set between 45ºF and 90ºF (7ºC and 32ºC).
However, it will display room temperatures from 30ºF to 99ºF (0ºC and
37ºC).
NOTE: If the thermostat measures a temperature over 99ºF (37ºC), HI
will be displayed on the LCD. If the temperature is below 32ºF
(0ºC), LO will be displayed on the LCD.
AUTO CUT-OFF
Your thermostat will automatically shut down in Heat mode if the room
temperature rises above 95ºF (35ºC). It will shut down in Cool mode if + - +
the room temperature drops below 45ºF (7ºC).
Note that if your system has malfunctioned and no longer responds to
thermostat controls, the Auto Cut-Off will not work.
EMERGENCY HEAT - RS2210C WITH HEAT PUMP Figure 6
Consult with your installer to determine if your system is a heat pump When the batteries become weak, a flashing battery symbol will
with an emergency heat system installed. If you have an emergency appear on the screen. When this symbol occurs, install two new AA
1 heat system you can activate it in HEAT mode by pressing the UP and batteries. You have approximately one minute to change the batteries
DOWN arrows together. The display will show an E by the flame icon and keep the thermostat's program settings. Once the batteries have
2
become too weak to ensure proper operation, your system will be
when the thermostat is in system HEAT mode.
3
turned off, and the display will be blank if battery powered.
The main heating system will not receive a call to turn on. This will
CAUTION:
allow maintenance to take place on the main heat system. To turn off When the battery symbol flashes the batteries are weak. If
the emergency system, press the UP and DOWN arrows together. The they are not replaced the display will fade. When the bat-
E will no longer be displayed. teries are dead the display will be blank. There will be no
4
temperature control and settings are not saved.
POWER FAILURE
NOTE: If you plan to be away from the premises over 30 days, we
Whenever the main power is interrupted or fails, the back-up battery
recommend that you replace the old batteries with new alka-
power will maintain the current settings. The heating and cooling
line batteries prior to leaving.
systems will not function. In the event of a power outage and dead
CONFIGURATION
batteries, the settings will revert to default settings when power is
resumed. You must reprogram your settings. The RESET button can be pressed with a paper clip to reset the
FILTER MONITOR thermostat back to the factory defaults as shown in the Configuration
Menu Options table.
The thermostat counts the number of hours your system's filter has
The Configuration Menu allows you to set certain thermostat operating
been in use. To maximize your system's performance and energy
characteristics for your system or personal requirements. Set System
efficiency, change or clean your filter regularly. When the total system
switch to OFF, then simultaneously press the UP and DOWN arrows
run time for heat and cool reaches 400 hours, the filter change indica-
for three seconds to enter the Configuration Menu which summarizes
tor (Check FLtr) will flash as a reminder to check your system's filter.
the options available. The display will show the first item in the Con-
Press and hold the UP and DOWN arrows together until Check FLtr no
figuration Menu Options table. An explanation of each option is listed
longer displays. This will reset the filter monitor to zero.
after the table. Press the DOWN arrow to change to the next menu
item. To change the setting, press the UP arrow. When the maximum
setting is reached, the selections will return to the lowest selection. To
exit the menu and return to the program operation, press the DOWN
arrow until the main display appears. If no buttons are pressed within
fifteen seconds, the thermostat will revert to normal operation.
14 15
23 24
B. Typical wiring diagram for single transformer heat pump system.
Terminal Equipment to Description
System selector switch must be set to HP.
Connect
NOTE: "Battery Operation Only" if 24 VAC common not present, other-
Two Stage Model RS2210C (Additional Terminals)
wise "Battery Backup".
W2 Second stage Energizes on a call for second stage
heat connection heating.
C R
L 24 VAC com- For input of fault signal from a
pressor fault compressor.
24 VAC
output
Supply
Description
24 VAC
Replace the cover by inserting the bottom tab on the thermostat body
Common
into the slot at the bottom of the wallplate. Move the cover to meet
(Battery
the top of the wallplate. Press the top of the body to snap it into the Operation
Only if not
wallplate.
present)
If 24 VAC is not pres-
CAUTION: Do not force the thermostat body onto the wallplate. Termi-
Two Stage Heat Single Stage Cool: RS2210C
nal pins inside the thermostat may become damaged.
C. Wiring diagram for single transformer standard system. System
WIRING DIAGRAMS
selector in configuration menu must be set to STD2 or STD1
Heat Pump Terminal Outputs
(single stage only).
Refer to the equipment manufacturer's instructions for specific system
NOTE: "Battery Operation Only" if 24 VAC common not present, other-
wiring information. You can configure the thermostat for use with a
wise "Battery Backup".
Heat Pump Type 1, single stage compressor system. This thermostat
is designed to operate a single transformer system. If you have a two
C R O B
transformer system, cut and tape off one transformer. If transformer
safety circuits are in only one of the systems, remove the transformer
24 VAC
of the system with no safety circuits. If required, replace the remain-
Supply
ing transformer with a 75 VA Class II transformer. After disconnecting
one transformer, the two commons must be jumpered together. 24 VAC
Common
Use the terminal output information below to help you wire the ther-
(Battery
Operation
mostat properly for your system.
Only if not
present)
Single Stage Heat and Cool: RS2110C
A. Typical wiring diagram for single transformer standard system.
D. Wiring diagram for single transformer heat pump system. System
System selector switch must be set to STD.
selector in configuration menu must be set to HP.
NOTE: "Battery Operation Only" if 24 VAC common not present, other-
NOTE: "Battery Operation Only" if 24 VAC common not present, other-
wise "Battery Backup".
wise "Battery Backup".
C R O B G Y1 W1
C R O B
24 VAC Heat Active
24 VAC Compressor
Reversing
Supply Contactor Supply
Valve
24 VAC Common Fan Relay First Stage 24 VAC Cool Active
Reversing
(Battery Operation Heat Common
(Battery Valve
Only if not present)
Operation
Only if not
present)
7
Configuration Menu Options OPERATION
System Selector Switch
Item Default
system
Temperature Scale F/C F The System Selector switch on the front of the
thermostat determines the operating mode of the
First Stage Differential 1°F (0.5°C)
thermostat. You may select COOL, OFF, or HEAT.
RS2210C only - Second Stage Differential 2°F (1.1°C) cool off heat
NOTE:
Off Set 0
from the wallplate, slide the System Selector to the OFF posi-
RS2210C only - DLY 2 20 tion to prevent the possibility of a rapid system on-off.
Fan Switch
RS2210C only - System Type HP
-
Temperature Scale - Select Fahrenheit or Celsius. fan The Fan switch should normally be set in the AUTO
position. The fan will be turned on along with normal
First Stage Differential - When the room temperature approaches the
operation of your system. In a normal gas or oil
set temperature the differential is the amount of overshoot allowed
before the thermostat calls for heating/cooling. furnace, the fan will be turned on by your furnace
on auto
after its warm-up delay. For electric heat, air
Second Stage Differential - Used for RS2210C only, same as First
conditioning, and heat pump operation, the fan will turn on with the
Stage Differential but controls a second stage system.
system. To run the fan continuously, slide the Fan switch to the
Offset - Use this to change ambient temperature readings up or down.
ON position.
DLY2 - Used for RS2210C only, is the second stage delay time.
HP - Used for selecting the system type on the RS2210C. Select HP
for heat pump. Select STD1 for one stage heating non-heat pump.
STD2
Select for two stage heating non-heat pump.
Familiarize yourself with these manual settings, so that you can easily
modify your settings as your comfort needs change. The example
below demonstrates the manual settings method.
NOTE: The temperature can be set in increments of 1ºF (1ºC).The heat
setpoint cannot be set higher than the cool setpoint, and the
cool setpoint cannot be set lower than the heat setpoint. If the
system selector is in Heat mode, the heat operating mode will
be set. After 15 seconds without a button press, the thermo-
stat will return to Normal Display mode.
Changing Settings
Start with a normal running display.
1. Select Heating with the system switch.
2. Use the UP and DOWN arrows to select the temperature for
heating.
3. Switch between HEAT and COOL. Repeat step 2 to select the
temperature for cooling.
16
25
E. Typical wiring diagram for single transformer heat pump systems.
C R O B G Y1 E/W1 W2 L
System
Reversing Auxiliary = Monitor
24 VAC Compressor
Switch
Supply Valve Contactor Heat Relay
Energized in
O B G Y1 W1
Heat, Off,
Emergency
Mode
Heat Active Compressor 24 VAC
Emergency Compressor
Reversing
Contactor Common Reversing Fan Relay Heat Relay
Fault Output
Valve (Battery Valve
(24 VAC) from
Operation Energized
Cool Active Heat Pump 120
Fan Relay in Cool
Only if not VAC
Reversing
present) Mode
Hot
Valve
24 VAC
Neutral
Transformer (Class II Current Limited)
F. Typical wiring diagram for single transformer heat pump only.
C R O B G Y1 E/W1 W2 L
Reversing Valve Compressor Heat Relay
Energized in Contactor
Stage 2
Heat, Off, Stage 1
Emergency
Mode
Reversing Emergency
Fan Relay Compressor
G Y1 E/W1 W2 L
Valve Ener- Heat Fault Output
gized in Cool
(24 VAC) from
Mode Heat Pump
120
Compressor Second Stage
VAC
Hot
Contactor Heat (if STD2
selected) 24 VAC
Neutral
Fan Relay First Stage
Transformer (Class II Current Limited)
Heat
G Y1 E/W1 W2 L
Compressor Second
Stage or
Contactor
Auxiliary Heat
Fan Relay Emergency
Compressor
Heat Fault Output
(24 VAC) from
Heat Pump
8 9
TROUBLESHOOTING
Problem Solution
Scrambled or double Remove clear mylar sticker.
display (numbers over
numbers).
Anytime you install or remove the thermostat
No display. Check connections and batteries.
Press Reset once with a small pin and
hold for two seconds then reprogram.
Entire display dims. Replace batteries.
Auto/Fan does not turn There may be as much as four minute
On. delay before the heat or cool system
turns on. Wait and check. (Compressor
protection delay).
Check your circuit breakers and switches
to ensure there is power to the system.
Replace batteries.
Make sure your furnace blower door is
closed properly.
Check the position of the furnace or Heat
Pump selector switches.
Erratic display. Press RESET once with a small pin and
hold for two seconds then reprogram.
Thermostat reads E1. Temperature sensor defective. Replace
unit.
Thermostat reads E2. System switch in wrong position. Move
system switch to correct position.
If you experience any other problems, contact Technical Support at:
www.invensyscontrols.com or (800) 445-8299.
17 18
191 E. North Avenue
Carol Stream, Illinois 60188 USA
www.invensyscontrols.com
352-00021-011 Rev B
©2012 Invensys Controls 7/12
26 27