Terminal Function - Robertshaw RS4110 Installation Manual

One Stage Models RS4110, RS5110 and RS6110
EQUIPMENT TO
TERMINAL
CONNECT
C Common
Connection
RH/R
Hot Connection
RC
Hot Connection
First stage
Y1* compressor
connection
First stage
W1*
heat connection
Indoor fan
G
connection
O
B
* This thermostat can be used as a heat-only or cool-only thermostat. Therefore, it
is not always necessary to use both W1 and Y1.
Two Stage Models RS4220, RS5220 and RS6220
EQUIPMENT TO
TERMINAL
CONNECT
L Compressor Fault
Second stage
Y2
connection.
Second stage
W2
heat connection
Emergency Heat
E
Connection
Three Stage Models RS4320 and RS6320
EQUIPMENT TO
TERMINAL
CONNECT
E Third stage heat

Terminal Function

24V AC For input of 24V AC common side of transformer.
Connect to 24V AC common side of the trans-
former for line power and nightlight feature.
24V AC
Connect to 24V AC hot side of the transformer.
Connect to 24V AC hot side of the cooling
24V AC
transformer for two transformer systems.
Note: Remove jumper to Rh when RC is connected.
Energizes on a call for first stage of cooling.
Energizes on a call for first stage of heating when
configured as a HP.
Energizes on a call for first stage of heating when
configured as a Non-HP.
Energizes with Y1 and Y2.
Energizes with W1 and W2 if the Gas/Elec switch
is set to electric.
Energizes when fan is switched to ON.
Energizes for heat pump cool reversing valve.
Energizes for heat pump heat reversing valve.
24V AC
Connect to fault signal for input from
a compressor.
Output
Energizes on a call for second stage
cooling
cooling (aux.).
Energizes on a call for second stage
heating (aux.).
Energizes on a call for emergency heat.
DESCRIPTION
DESCRIPTION
DESCRIPTION
Energizes on a call for 3rd stage heat
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