Robertshaw RS4110 User manual

Thank you for purchasing a Robertshaw RS4000 thermostat. This user’s
manual will guide you through the setup of the RS4110 single stage and
the RS4220 two stage thermostats. The thermostat should already be
mounted and correctly wired. The default settings will enable the
thermostat to operate efficiently.
Features
• Pop-Up Wizard
• Automatic changeover
• Circulating Fan
• Worry-Free memory retention
• Easy change battery
• Large back lit display
• Filter change reminder
• Low battery indicator
• Fahrenheit and Celsius displays
• Dual power
• Adjustable 1st stage temperature differential: 0.5 F Degrees to 3.0 F
Degrees (0.5 C Degrees to 1.5 C Degrees)
• Accuracy within ±1 F Degree
• Universal staging on multi-stage units
• Automatic heating shutdown if temperature exceeds 99°F (37°C)
• Keypad security lockout
• User settable Hi and Lo temperature limits
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352-00055-001
USERS MANUAL

Application
The Robertshaw 4000 family of thermostats is designed to control gas,
electric, oil, heat pump, and millivolt heating and electric cooling systems.
The RS4110 is a single stage thermostat while the RS4220 is a two-stage
thermostat.
The RS4000 thermostats are non-programmable and operate on a single
setpoint.
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.
• 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 heating
and cooling cycles on heat pumps.
Detailed mounting and wiring instructions are explained in the Installation
Manual.
Refer to the pop up wizard section in the installation manual for a
complete list of factory defaults and contractor settings.
Providing Power to the Thermostat
For wiring diagrams refer to the Installation Manual.
The thermostats will operate using 24V AC or two AA batteries. When
the two AA batteries are installed the thermostat will continue to run if
the 24V AC fails.
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Installing or Changing the 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.
When the batteries are low the thermostat will enter a low battery mode.
Low battery mode has two levels.
• LEVEL 1: The low battery icon will be displayed. The
thermostat will continue to operate. Replace the
batteries as soon as possible
• LEVEL 2: The low battery icon will flash. If 24V AC is
present the thermostat will continue to operate if
the batteries are discharged or removed. If 24 VAC
is not present the thermostat runs on batteries only
and THE SYSTEM WILL NOT OPERATE. Replace batteries
immediately.
Replace batteries if leaving thermostat unattended for more than 30 days.
Display Map
The thermostat display will show information that is being used during
operation or programming. This illustration shows all of the display’s
possibilities with an explanation.
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User Programmable Settings (Default)
During any program changes the display returns back to the operating
display if a button has not been pushed in 10 seconds.
The temperature scale is set to Fahrenheit.
Night light is off.
The first stage differential is 1F degree.
The second stage differential (RS4220) is 2F degrees.
Auto changeover deadband is 3F degrees.
Filter reminder length is off.
Temperature offset is 0 degrees.
The HI heat limit is 90°F (32°C).
The LO cool limit is 45°F (7°C)
The operation mode will be one of the following:
The fan setting is Auto.
The keypad has no password protection.
Refer to the pop up wizard section in the installation manual for a
complete list of factory defaults and contractor settings.
Emergency Heat
Your system may include Emergency Heat. The RS4220 thermostats have
an emergency heat capability for multi stage heat pump systems. To
determine if your system is capable of using emergency heat contact your
contractor. Use the button to enter the EMER mode. An E will be
displayed with the Heat symbol. This mode is used to bypass the heat
pump when it needs servicing or when it cannot keep up with the heat
demand.
Auto Changeover
Auto changeover is the ability of the thermostat to switch automatically
between heating settings and cooling settings. This is useful in Spring and
Fall when the days are warm and the nights are cool. In heat mode if the
room continues to warm beyond a set threshold the thermostat switches
to the cool mode and the associated cooling settings. The reverse is also
true.
As the room temperature changes, the thermostat will call for heating or
cooling as needed. To prevent the heating and cooling systems from
overriding each other, an automatic changeover deadband is used.
The deadband is the number of degrees that the room temperature can
move away from the active setpoint until heating or cooling is called for.
The larger the deadband the more the room temperature will vary.
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Making Changes To The Programmed Settings
Any setting can be changed when it is flashing by pushing or
If a button is not pushed for 10 seconds the thermostat returns to
operation.
The following buttons can be accessed from the front panel.
LIGHT BAR: Turns on the display back light for 10 seconds.
FAN: Turns fan to AUTOMATIC, CIRCULATE or ON.
UP ARROW: Used during programming for changing the flashing item
upward.
DOWN ARROW: Used during programming for changing the flashing item
downward.
HEAT/COOL: Toggles through OFF, HEATING, COOLING, and AUTO. If using
an RS4220 and configured as HP then emergency heat is also displayed.
To Make Changes to the Settings
When and are pressed at the same time the thermostat will
display the current settings in order.
To change any setting:
When the setting is visible and flashing press the or
arrows to adjust the number on the screen.
SC = Scale in °F (Fahrenheit) or °C (Celsius)
bL = Display backlight always on ”Y” or off ”n”. Also called the nightlight
feature. If the thermostat has been wired to enable this feature it will
be displayed and the setting can be changed.
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dF = The differential keeps the thermostat from turning on for small
changes in temperature. When in Fahrenheit the range is 0.5 to 3.0
Degrees. In Celsius the range is 0.5 to 1.5 Degrees. The differential is
factory set at 1.0 F Degree (0.5 C Degree). This means that whenever
the room temperature is more than 1 F Degree (0.5 C Degree)
different from the set temperature the system will turn on. If the
system is turning on too often, increase the differential setting. Note
that a larger differential will mean the room temperature changes
more before the system turns on.
d2 = SECOND STAGE DIFFERENTIAL = Operates with the first stage to
control a second heating/cooling system. This number will be added
to the first stage differential (See: Two Stage Systems). If the first
stage is running too often lower the settings. This will turn the
second stage on to help the first stage. If both stages are coming on
too often then increase this setting to delay the second stage.
dL=SECOND STAGE DELAY = This timer starts when the first stage turns
on. It resets when the first stage turns off. If this timer runs out the
second stage will turn on (See Two Stage Systems).
db = Deadband for auto changeover = the number of degrees that the
room temperature can move away from the active setpoint until
heating or cooling is called for. The larger the deadband the more
the room temperature will vary. This can be from heat to cool or cool
to heat.
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Hi = High Heat Limit = This is the highest allowed heating setpoint. The
user will not be allowed to set a setpoint temperature higher than
this value.
Lo = Low Cool Limit = This is the lowest allowed cooling setpoint. The user
will not be allowed to set a setpoint temperature lower than this
value.
FL = Timer to remind the home owner to maintain the filter. Default setting
is off. The timer runs when the system is on and can be set at 0 (OFF)
or 1000 hours. When the time expires FL is displayed. Press any
button to reset and return to the normal display.
CY = Cycle Timer allows a compressor to rest between cycles. Can be set
from 0 to 5 minutes in 1 min increments.
WARNING: A wrong short cycle setting can
damage your equipment. This should only be
changed by a trained HVAC professional.
CL = Calibration offset. Changes the displayed temperature from the
actual temperature by +3 to -3 degrees in one degree increments.
Increasing the offset by +2 will cause the thermostat to display a
temperature that is 2 degrees higher than the actual room
temperature
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Security Lockout to Protect the Settings
The buttons on the front of the thermostat can be locked with a password.
To create a password:
1. Press the and buttons at the same time and hold them in
for 5 seconds.
You will be asked for a 2 digit password.
2. The digits are set using the and buttons to progress
through 00 to 99.
move to the next digit. Press to move back.
3. The password is saved after 10 seconds or by pressing and
at the same time.
All of the front buttons are now locked out until the password is entered.
Pressing any button will cause to flash.
To unlock the buttons:
1. Push and hold the and buttons for 5 seconds until the
request for password is displayed.
2. Enter the digits for the password by pressing or to
progress through the numbers to the password.
If the wrong password is entered the display will flash NO for 5
seconds then return to normal.
3. Press and when the correct password is displayed.
The buttons will be unlocked.
Once the security has been disabled, a password needs to be re-created
to protect the settings.
Two Stage Systems
A 2nd stage is a second or additional system that will provide extra
heating or cooling. When a 2nd stage is operating the display will show
the number 2 by the heat/cool icons.
A programmable temperature differential (default value is 2.0 F Degrees or
1.0 C Degree) and time delay (default value 20 minutes) control the 2nd
stage cycle.
Operation of the 2nd stage begins when:
• The room temperature changes from the setpoint by the sum of the
1st and 2nd stage differential settings.
• The first stage has been on for the specified delay time, but the
heating/cooling demand has not yet been met.
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Backlit Display
This thermostat is equipped with a backlight to make viewing the display
easy. Press the button to activate the backlight. The backlight will
turn off after 10 seconds of inactivity. If the thermostat is wired to have
the backlight stay on all the time the night light can be turned on/off in
the settings menu.
Automatic Shut-Down
The thermostat will not display the room temperature if the temperature
goes higher than 99°F (37°C) or lower than 32°F (0°C).
The display will show HI or LO. The thermostat continues to control
heating and cooling and will resume the display of real time information
when the room temperature is back inside the display’s range.
Setting The Fan To ON, AUTO or CIRC
The fan has 3 settings: On, Auto, or Circ. Press the button to switch
among the three.
ON: The fan is on constantly. The status of the heating/cooling equipment
has no effect on the fan.
AUTO: Whenever there is a call for heating or cooling the fan will turn on.
CIRC: The fan operates in a cycle of on for 10 minutes and off for 20
minutes. Whenever there is a call for heating or cooling the cycle
stops and the fan responds to the call. The fan circulation resumes
when the call for heating or cooling is satisfied.
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Troubleshooting
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System fan does not operate
properly.
Move fan option switch to either gas
or electric, to match system (see
Switch Locations section).
Check F/C (Fahrenheit/Celsius) setting.
See Changing: Scale or Calibration
section.
Thermostat does not display
proper room temperature.
Thermostat does not turn on system. Check wiring (see Wiring
Diagrams section).
Increase temperature differential (see
Changing: Scale, Clock Mode,
Differential, Filter Hours, Short Cycle,
or Offset section).
If problems with thermostat cannot be resolved, call:
www.invensyscontrols.com
or
Technical Support: [phone]
System turns on too often.
Problem Action
Display Shows HI or LO and room tem-
perature is normal.
Call a licensed service person to
replace/repair.