Robertshaw RS4220C, RS4320C, RS5220C, RS6320C Install Sheet
RS4220C RS4320C
RS5220C
RS
220C
6
RS
352-00061-001 Rev D
INSTALLATION MANUAL
3
20C
6
RS4000C Series RS5220C
QUICK START
STEP 1 Pull backplate straight out
STEP 2 Install backplate on the wall
STEP 3 Push front onto backplate
STEP 4 Remove tape on cover
STEP 5 Rotate cover up and remove
STEP 6 Place batteries in tray and
RS6000C Series
to remove
and wire
battery tray
place in thermostat
1
Thank you for purchasing a Robertshaw® thermostat. This manual will
describe how to install and test the Robertshaw two stage RS4220C,
RS5220C, RS6220C and three stage* RS4320C, RS6320C thermostats. For
complete operation instructions, refer to the Robertshaw User Manual.
Use the model number to identify your thermostat.
R S X 1 1 0
Application
4 = Non-Programmable
Value Series
5 = Programmable Value Series
with 5-2 Day Schedule
6 = Programmable Value Series
with 7 Day Schedule and
Copy Feature
These thermostats have three main parts:
A. The backplate – mounts to the wall and has wire connections.
B. The body – snaps to the backplate and contains the electronics and
programming buttons.
C. The cover – snaps to the top of the body and swings up to give
access to the programming buttons.
Recycling Thermostat
If this thermostat is replacing a thermostat that contains mercury in a
sealed tube, do not place your old thermostat in the garbage. Contact
your local waste management authority for instructions regarding proper
disposal of the thermostat. If you have any questions, call Robertshaw
technical support at 1-800-445-8299.
0 = Standard Thermostat
Number of Cooling Stages
Number of Heating Stages
* Three stages of heating available for heat pump applications only.
2
IMPORTANT SAFETY INFORMATION
WARNING:
• Always turn off power at main fuse or circuit breaker panel before
installing, removing, cleaning, or servicing thermostat.
• Read all the information in this manual before installing 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.
• This is a dual powered thermostat that will operate on 24V AC
or batteries.
• 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.
• Do not connect ground to any terminal in this unit.
• This thermostat is configured with automatic compressor protection
to prevent damage because of short cycling or extended power
outages. Short cycle protection provides a delay between
compressor cycles on heat pumps.
Replacing Existing Thermostat
1. Turn off power to heating and cooling system.
2. Remove cover from old thermostat to expose wires.
3. Disconnect wires one at a time from existing terminals. Use
enclosed labels to mark existing wires. Refer to cross references in
Table 1 if existing wiring does not directly match the labels.
4. Remove existing thermostat base from wall.
Table 1
Old Terminal New Label Description
R, RH/R, V-VR or VR-R R/RH 24V AC Return
RC RC 24V AC Cooling Transformer
C, X or B C 24V AC Transformer Common Side
F or G G Fan Control Relay
Y, Y1 or M Y1 1st Stage Cooling Circuit
W1 or W W1 1st Stage Heating Circuit
Y2 Y2 2nd Stage Cooling Circuit
W2 or W-U W2 2nd Stage Heating Control
W3 E 3rd Stage Heating Control
E E Emergency Heating Control
3
Installing the Robertshaw Thermostat Base
NOTE: For new installations, mount the thermostat on an inside wall, five
feet above the floor. Do not install behind a door, in a corner, near
air vents, in direct sunlight, or near any heat or steam generating
fixtures. Installation at these locations will affect thermostat
operation.
1. Be certain power is off to the heating and cooling systems.
2. Remove the backplate by placing your finger through the wire
opening. Pull the backplate straight out from the body.
3. Place the backplate in position on the wall. Pull the wires through
the wire opening.
4. Hold the backplate level and mark the mounting holes on the wall.
5. Drill the marked holes using a 5 mm (3/16 in.) drill bit.
6. Tap in the wall anchors and secure the base to the wall with the
supplied screws.
NOTE: The thermostats are designed to also mount on a single gang
junction box.
Wiring Terminals
Wire Opening
RH/R
RC
C
L
G
O
B
Y1
W1
Y2
W2
E
Mounting Holes
Providing Power to the Thermostat
To take advantage of the Pop-Up Wizard, power should be applied when
the settings are ready to be entered. Fill in the chart in the Pop-Up
Wizard section before applying power.
These thermostats will run on either two AA batteries or 24V AC. If the
common wire from the transformer is not available, the unit must be
powered by two AA batteries.
Thermostats with batteries and powered by 24V AC will continue to
function if the 24V AC fails.
Maintaining the Batteries
When the batteries are low, the thermostat will enter a
low power mode. Low battery mode has two levels.
• LEVEL 1: The low battery icon will be displayed.
• LEVEL 2: The low battery icon will flash indicating
that THE SYSTEM WILL NOT OPERATE.
4
System Switch Selection
The body of the thermostat has two switches on the backside. They
are accessible by removing the backplate from the body. The installer
should set these to match the system.
If the thermostat is controlling a heat pump system, set the first switch
to Heat Pump. Set the second switch based on the type of the backup
heating system.
If the thermostat is controlling a non-heat pump system, set the first
switch to Non-Heat Pump. The second switch must be set to match the
system as Gas or Electric.
If Non-Heat Pump and Gas are selected, the heating system will control
the fan.
If Non-Heat Pump and Electric are selected, the thermostat will control
the fan.
If Heat Pump is selected, the thermostat will control the fan.
Heat Pump or Non-Heat Pump Gas or Electric
Non-Heat
Heat
Pump
Pump
Gas
Electric
Connecting the Wires
1. The wire ends should be stripped back 8 mm (5/16 in.).
2. Use the Wiring Diagrams and secure the wires into the terminal strip.
If replacing another thermostat, the wires should have been labeled.
Match the labels to the terminals. Tighten the screws.
3. Pull lightly on each wire to ensure the connection is secure.
NOTE: Nightlight feature is only enabled when the RH/R and C terminals
are connected.
5
Two Stage Models RS4220C, RS5220C and RS6220C
L
Y2
W2
E
EQUIPMENT TO
CONNECT
24V AC
Compressor Fault
Output
Second stage
cooling
connection.
Second stage
heat connection
Emergency Heat
Connection
DESCRIPTION
Connect to fault signal for input from
a compressor.
Energizes on a call for second stage
cooling (aux.).
Energizes on a call for second stage
heating (aux.).
Energizes on a call for emergency heat.
If emergency heat is the same as the second
stage then jumper E to W2.
TERMINAL
Three Stage Models RS4320C and RS6320C
TERMINAL
EQUIPMENT TO
CONNECT
E Third stage heat Energizes on a call for 3rd stage heat
DESCRIPTION
6
When used as
Wiring Diagrams
Heat Pump with Cool Active Reversing Valve With Battery
Remove jumper if
separate cooling
transformer is
present.
* Insert jumper between W2 and E if emergency heat source is same as second stage
RH/R
RC
C
L
Make certain the HP switch is in the HP position.
Transformer
24 Vac
Compressor
Fault Output
(24VAC)
When used as
Hot
120 Vac
Fan
Relay
Reversing
Valve
Compressor
Contactor
Second
Stage Cool
Second
Stage Heat
Emer Heat
G
O
B
Y1
W1
Y2
W2
E*
Remove jumper if
separate cooling
transformer is
present.
Heat Pump with Heat Active Reversing Valve With Battery
Transformer
Hot
120 Vac
24 Vac
RH/R
RC
C
Compressor
L
Fault Output
(24VAC)
Reversing
Compressor
Contactor
Stage Cool
Stage Heat
Emer Heat
Make certain the HP switch is in the HP position.
* Insert jumper between W2 and E if emergency heat source is same as second stage
When used as
Non-Heat Pump With Battery
Heat
Transformer
Hot
120 Vac
Remove jumper if
separate cooling
transformer is
present.
24 Vac
RH/R
RC
C
L
Cooling
Transformer
24 Vac
Cooling transformer is not required
Make certain the HP switch is in the Non-HP position.
Fan
Relay
Valve
Second
Second
Hot
120 Vac
G
O
B
Y1
W1
Y2
W2
E*
Fan
Relay
Compressor
Contactor
First Stage
Heat
Second
Stage Cool
Second
Stage Heat
G
O
B
Y1
W1
Y2
W2
E
7
Wiring Diagrams
Non-Heat Pump With Battery Backup
Remove jumper if
separate cooling
transformer is
present.
RH/R
Make certain the HP switch is in the Non-HP position.
RC
C
L
When used as
Transformer
24 Vac
Hot
120 Vac
Fan
Relay
Compressor
Contactor
First Stage
Heat
Second
Stage Cool
Second
Stage Heat
G
O
B
Y1
W1
Y2
W2
E
When used as
Transformer
Hot
120 Vac
24 Vac
RC
C
Compressor
L
Fault Output
(24VAC)
Reversing
Compressor
Contactor
Second
Stage Cool
Second
Stage Heat
Remove jumper if
separate cooling
transformer is
present.
Heat Pump with Cool Active Reversing Valve With Battery Backup
RH/R
Emer Heat
Make certain the HP switch is in the HP position.
* Insert jumper between W2 and E if emergency heat source is same as second stage
When used as
Transformer
Hot
120 Vac
24 Vac
RC
C
Compressor
L
Fault Output
(24VAC)
Reversing
Compressor
Contactor
Remove jumper if
separate cooling
transformer is
present.
Heat Pump with Heat Active Reversing Valve With Battery Backup
RH/R
Stage Cool
Stage Heat
Emer Heat
Make certain the HP switch is in the HP position.
* Insert jumper between W2 and E if emergency heat source is same as second stage
Fan
Relay
Valve
Relay
Second
Second
Fan
Valve
G
O
B
Y1
W1
Y2
W2
E*
G
O
B
Y1
W1
Y2
W2
E*
8
Applying Power
Before applying power, fill in the chart in the Pop-Up Wizard section of
this manual.
When 24V AC power or battery power is first applied to the thermostat,
the display will show the model number followed by the Pop-Up Wizard.
The thermostat will start normal operation following the Pop-Up Wizard.
Power is applied to the thermostat two ways:
1. Installing the batteries.
2. Not installing the batteries and connecting the thermostat body to a
backplate that has the C terminal connected and 24V AC present.
NOTE: A thermostat powered by 24V AC will use the batteries as backup
power if the 24V AC fails.
Installing Batteries
To remove the battery compartment
gently squeeze the ribbed edges on
both sides.
The battery compartment will pull
down from the thermostat body
and will detach. Install two AA
batteries following the polarity as
shown inside the compartment.
Place compartment back into the
thermostat.
Connecting The Body
Attach the thermostat body to the backplate by holding it directly in front
of the backplate. The edges will match and the wiring connections will
make contact. Push the body in until it snaps in place.
9
Pop-Up Wizard
The Wizard routine will display factory default settings. Each setting will
display for ten seconds. Use the or buttons to change the setting.
Settings that are not changed will operate with the values that are
displayed. To fast forward through the Wizard, press Edit Schedule. The
Wizard can be exited by pressing Start/Stop Schedule. This will save the
settings and place the thermostat into operation.
Use this chart to write down the desired settings before applying power.
Settings may vary by model.
Displayed Details Default Change To
SCAL choose °F or °C °F _______
CLOC choose 12 or 24 hour 12 _______
LITE y = always on, n = off y _______
DIFF differential, set between 0.5 to 3.0 °F
or 0.5 to 1.5 °C 1 °F _______
DIF2 2nd stage differential,
added to first stage differential 2 °F _______
DLY2 2nd stage delay, in minutes 20 _______
DLY3 3rd stage delay, in minutes 20 _______
AUTO auto changeover enable y _______
DEDB auto changeover deadband
in degrees 3 °F _______
HI heat setting limit in degrees 90 °F _______
LO cool setting limit in degrees 45 °F _______
VAC HEAT vacation heat setpoint in degrees 62 °F _______
VAC COOL vacation cool setpoint in degrees 85 °F _______
CHECK check filter timer in hours n or OFF _______
CYCL compressor short cycle delay in minutes 5 _______
CAL calibration offset in degrees 0 _______
After the Wizard has configured the thermostat, the settings can be
edited by pressing and simultaneously. This will allow you to
change settings.
Factory settings that have not been changed will use the default settings
for operation.
10
Default Settings for RS5220C, RS6220C
and RS6320C
The RS5220C and RS6320C series are programmable thermostats
and are preprogrammed with a recommended schedule. The schedule is
designed to lower energy costs year-round.
Temperature Settings
Winter (Heating) Summer (Cooling)
Morning (6:00 am) 70 °F (21 °C) 78 °F (25 °C)
Day (8:00 am) 62 °F (17 °C) 85 °F (29 °C)
Evening (6:00 pm) 70 °F (21 °C) 78 °F (25 °C)
Night (10:00 pm) 62 °F (17 °C) 82 °F (28 °C)
Setting Time and Day for the RS5220C,
RS6220C and RS6320C
To adjust the time and day settings press the SET TIME button. The hour
will flash. To change the settings:
1. Use the and buttons to change the flashing number.
2. Press the SET TIME button to move through hours, minutes and days
of week.
3. Make changes as needed. They will be saved automatically.
NOTE: The thermostat will not correct for Daylight Saving Time.
Installation Test Utility
WARNING: The installation test procedures
can damage the heating/cooling equipment
if used incorrectly. These procedures
should only be performed by trained
HVAC personnel.
The following instructions may be used to test the heating/cooling
system for correct function.
To enter the test mode press and hold
Short Cycle protection is disabled when using the test utility.
Push the and or Start/Stop schedule buttons at any time to
exit test mode.
In the test mode:
Press to force the fan on or off.
Pressing
following tables. The display will show appropriate animated icons.
repeatedly will allow testing of the system modes. See
and for five seconds.
11
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