Robertshaw RS9220 User manual

RS9220
Installation Manual

Thermostat System Types
Table of Contents Page
Thank you for purchasing a Robertshaw®thermostat.
This manual will describe how to install and test the Robertshaw RS9220 thermostat.
Power Options
Battery Power
Hardwire (Common Wire)
Gas, Oil, or Electric Heat with Air Conditioning
Heat Pumps (without auxiliary or emergency heat)
Multi-Stage Systems
Heat-Only, including for Floor and Wall-Furnace
Cool-Only
750 Millivolt Heating Systems
Installation Location 2
Thermostat Quick Reference 3
Wallplate Installation 4
Wiring 5-12
Installer Setup Menu 13-17
Mounting & Battery Installation 18
Programming 19-22
Specications 23
IMPORTANT SAFETY INFORMATION
WARNING:
• Always turn off power at the main power
source by unscrewing fuse or switching
circuit breaker to the off position before
installing, removing, cleaning, or servicing
thermostat.
• Read all of the information in this manual
before installing or programming this
thermostat.
• This is a 24V AC low voltage thermostat. Do
not install on voltages higher than 30V AC.
• All wiring must conform to local and national
building and electrical codes and ordinances.
• Do not short (jumper) across terminals on
the gas valve or at the system control to test
installation. This will damage the thermostat
and void the warranty.
INSTALLATION MANUAL
1

Install the thermostat 4 to 5 feet above the oor in an area with good
air circulation and average temperature.
For new installations, mount thermostat on an inside wall, 4-5 feet
above the oor. Do not install the thermostat in the following locations:
• Behind a Door
• In a Corner
• Near Air Vents
• In Direct Sunlight
• With an Outside Wall Behind the Thermostat
• Near any Heat or Steam Generating Fixtures
• Near any Concealed Pipes or Chimneys
Installation at these locations will affect thermostat operation.
2
INSTALLATION LOCATION

Getting to know your thermostat
Mon
Room
Menu
Set At
SLEEP
LCD Screen
Fan Switch
System Switch
Temperature Set-Point Buttons
User Buttons
Easy Change Battery Door
Tech Set
Sun Mon Tue Wed Thu Fri Sat
Next Step
Min Com On
Com DelayHeat
Set Time
Run Sched
Set Sched
Hold
Prev Step
Menu
Done WAKE
Cool Swing
Room
LEAVE RETURN
Hold
SLEEP
Filter
Displays the user
selected set-point
temperature.
Days of the week
and time.
Indicates the current
room temperature.
Programmable Time Periods:
This thermostat has 4
programmable time periods
per day.
Button Options
LCD
Hold: Is displayed
when thermostat
program is
overridden.
Low Battery
Indicator:
Replace batteries
when indicator is
shown.
NOTE: If
these icons are
ashing, there is
a 5-minute delay
for compressor
protection.
System
Operation
Indicators:
The
AM
PM
Set At
,
AM
PM
Set At
or
AM
PM
Set At
icon will display
when the COOL,
HEAT, or
AM
PM
Set At
(fan)
is on.
COOL OFF
ON AUTO
FAN
HEAT
SYSTEM
1
1
4
2
3
5
6
Set At
PM
AM
THERMOSTAT QUICK REFERENCE
3

Mercury Notice:
This product is mercury-free. However,
if this product is replacing a control
which contains mercury, it needs to
be disposed of properly. Contact your
local waste management authority for
instructions regarding recycling and
proper disposal of the control.
Caution:
Electrical Hazard
Disconnect power before installing
this product. Failure to do so can
cause electric shock or equipment
damage.
For a vertical mount,
put screws on the top
and bottom.
For a horizontal mount,
put screws on the left
and the right.
Vertical mount
Vertical mount
Horizontal mount
Horizontal mount
4
WALLPLATE INSTALLATION

1 Turn Off Power to Heating/Cooling System
Circuit breaker
box
or
Heating/cooling system
power switch
Remove old thermostat but leave wallplate with wires attached.
Do not remove wallplate
Terminal
designation
2 Remove Old Thermostat
WIRING
5

3 Label Wires with Tags
Label the wires using the supplied wire labels
as you disconnect them.
Wiring Labels
Apply these wiring labels to each wire with the appropriate
terminal designation as you remove it from the existing
thermostat.
B B Y2 Y2 C C E E F F
G G H H L L O O P P
R R RC RC RH RH T T U U
V/VR V/VR W W W1 W1 W2 W2 W3 W3
X X X1 X1 X2 X2 Y Y Y1 Y1
AUX AUX
4 Separate Wallplate from
New Thermostat
Remove wallplate from the new thermostat
and mount onto wall.
Wallplate
Wire Labels
Terminal designation
ELEC
GAS
6
WIRING

5 Mount Wallplate for New Thermostat
Mount the new wallplate using the included screws and anchors.
Drill 3/16-in. holes for drywall
Drill 3/16-in. holes for plaster
WIRING
7

6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring (Conventional Systems)”
on page 9 and connect to terminal as shown (see notes, below).
Screw
Insert wires and
tighten screws
Remove metal
jumper if you
have both RH
and Rc wires
8
WIRING

Alternate Wiring (Conventional Systems)
If labels do not match letters on the thermostat, check the chart below and connect to terminal as
shown here (See notes, below).
If wires will be connected to both RC and RH/R terminals, remove metal jumper.
If there is C or X wire available then you can connect with C terminal. If there is
no C or Xwire then no need to connect with C terminal.
If you have a heat pump without auxiliary/backup heat connect either the O or B, not
both. If you do not have a heat pump, do not connect O or B. Wrap bare end of wire
with electrical tape.
Place a jumper (piece of wire) between Yand W if you are using a heat pump
without auxiliary/backup heat.
4
or or or or or or
WIRING
9

Notes
Wire specications
Use 18- to 22-gauge thermostat wire.
Shielded wire is not required.
Common wire
The C (common wire) is optional when
the thermostat is powered by batteries.
Terminal Designations
C24 VAC Common
OHeat pump reversing valve energized
In cooling
BHeat pump reversing valve energized
in heating
WHeat relay Stage 1
W2 Heat relay Stage 2
RH 24 VAC power for heating
RC 24 VAC power for cooling
GFan relay
YCompressor relay Stage 1
Y2 Compressor relay Stage 2
10
WIRING

Power supply.
Optional 24 VAC common connection when thermostat is used in battery power mode.
Typical 2H/2C System: 1 Transformer Typical 2H/2C System: 2 Transformers
COMPRESSOR
RELAY
HEAT RELAY
HEAT RELAY
HEAT RELAY 2 HEAT RELAY 2
REMOVE JUMPER
FAN RELAY
FAN RELAY
(HOT)
COMPRESSOR
RELAY 2
COMPRESSOR
RELAY 2
COMPRESSOR
RELAY
(HOT)
(HOT)
WIRING
11

Typical Heat-Only System
Typical Heat-Only System With FanTypical 2H/2C Heat Pump System w/o Aux.
Typical Cool Only System
COMPRESSOR
RELAY 1
COMPRESSOR RELAY
COOL REVERSING
VALVE
HEAT REVERSING
VALVE
COMPRESSOR
RELAY 2
HEAT RELAY
HEAT RELAY
FAN RELAY FAN RELAY
FAN RELAY
(HOT)
(HOT)
(HOT)
(HOT)
WIRING
12

Installer Setup Menu
This thermostat has an installer setup menu
for easy configuration. Follow the procedure
below to set up the thermostat to match the
specific heating/cooling system.
1. Press MENU.
2. Press and hold TECH SET for 3 seconds.
3. Congure the installer options as desired
using the table below.
Use or to change settings and
NEW STEP or PREV STEP to move from
one option to another. Note: Only press
DONE when you want to exit the Installer
Setup options.
INSTALLER SETUP MENU
13

Next step
Prev step
Next step
Prev step
Next step
Prev step
INSTALLER SETUP MENU
14
Settings Display Adjustment Options Default
Filter Change
Reminder
This setting will ash FILT in the
display after the elapsed run time
to remind the user to change the
lter. The OFF setting will disable
this feature.
The lter change reminder can be
adjusted from OFF to 2000 hours
in 50 hour increments. Press
the second button from the top
left side of the thermostat to
display the current lter elapsed
run time.
OFF
Room
Temperature
Calibration
This setting allows the installer to
change the calibration of the room
temperature display so that, for
example, the thermostat would
read 72°F instead of 70°F.
The room temperature display
can be adjusted to read up to
3° above or below the factory
calibrated temperature.
0
Minimum
Compressor
On-Time
The installer can select the
minimum run time for the
compressor to help protect the
compressor from short-cycling.
The minimum compressor run
time can be adjusted from OFF
to 3, 4, or 5 minutes. If 3, 4, or 5
is selected, the compressor will
run for at least the selected time
before turning off (although the
fan may continue to run for a
short time).
OFF

INSTALLER SETUP MENU
15
Settings Display Adjustment Options Default
Compressor
Short Cycle
Delay
The compressor short cycle delay
setting will not allow the compressor
to be turned on for 5 minutes after it
was last turned off in order to protect
the compressor.
The compressor short cycle
delay setting can be removed by
selecting OFF.ON
Cooling
Differential
The cooling differential is factory
preset at 0.5°. This means that
whenever the room temperature
heats by 0.5° full degree from the
temperature setting, the cooling
system will turn on. If the cooling
system turns on too often, increase
the temperature differential.
The cooling differential setting is
adjustable from 0.2°F to 2°F. 0.5
Heating
Differential
The heating differential is factory
preset at 0.4°. This means that
whenever the room temperature
cools by 0.4° from the temperature
setting, the heating system will turn
on. If the heating system turns on
too often, increase the temperature
differential.
The heating differential setting is
adjustable from 0.2°F to 2°F. 0.4
Prev step
Prev step
Prev step
Next step
Next step
Next step

Settings Display Adjustment Options Default
For C Select F for Fahrenheit temperature
display or select C for Celsius display.
F for Fahrenheit
C for Celsius F
12 or 24
Hour Clock Select a 12 or 24 hour clock setting. Use and to
select 12 or 24 hour clock. 12
Fan
Operation
Select GAS or ELEC depending on the
type of furnace.
GAS - GS
or
ELEC-EL GAS
Prev step
Prev step
Next step
Next step
Prev step
Next step
INSTALLER SETUP MENU
16

Settings Display Adjustment Options Default
Program
Options
This thermostat can be congured
to have 7 Day, 5+1+1 programming
or be non-programmable.
If 7 Day is selected, in Set Time
all seven days will need to be
programmed individually.
If 5+1+1 programming is selected,
in Set Time Monday–Friday will
be programmed together and
Saturday and Sunday will need to be
programmed individually.
If 0d is selected, the thermostat
becomes non-programmable.
Use and to select
7d for 7 Day, 5d for 5+1+1, or
Od for non-programmable.
5d
Prev step
Next step
INSTALLER SETUP MENU
17

Mounting Thermostat
Battery Installation
Align the 4 tabs on the faceplate with
the corresponding slots on the back of
the thermostat, then push gently until
the thermostat snaps into place.
Battery installation is optional if used with AC power (the Cterminal is connected).
During power outages, the batteries will save settings and power the display.
Insert 2 AAA
Alkaline batteries.
FAN
SLEEP
Mon
Set At
Menu
Room
AUTO COOL
SYSTEM
HEAT
OFF
ON
MOUNTING & BATTERY INSTALLATION
18