Steffes 3120 - Auxiliary Load Control; Humidifier;Electronic Filter Installation

Installation  2.13 Comfort Plus
LOW VOLTAGE CONNECTIONS
CONVENTIONAL FURNACE APPLICATION
(SHOWN WITH UNCONTROLLED AIR CONDITIONING SYSTEM)
FIGURE 13
AUXILIARY LOAD CONTROL
The Comfort Plus can be used to provide control signals
to other loads in the application. To do so, connect low
voltage control wires to the "COM" and "NC" or the
"COM" and "NO" positions of the six (6) position low
voltage terminal block in the electrical compartment of the
Comfort Plus system. (See Figure 14.) These contacts
are rated for 30 volts, 3 amps maximum.
If control of external line voltage devices is desired,
contact the factory and order the Auxiliary Control Relay
(Order Item # 1302010) or the Auxiliary Control Relay
with Override (Order Item #1302012).
TYPICAL AUXILIARY LOAD CONTROL
FIGURE 14
Installation
HUMIDIFIER/ELECTRONIC FILTER INSTALLATION
The Comfort Plus is capable of being connected to a humidifier and/or an electronic air filter. If installing either
of these devices, connections to the Comfort Plus system are made to the bottom two relays on the Base IO
Relay Board inside the system's electrical panel. Refer to the Line Voltage Wiring Diagrams (Page A.08-A.11)
for the location of these relays.
If installing a humidifier, connect it to the "HEAT CALL" relay on the Base IO Board. This relay closes during
a heat call.
If installing an electronic air filter, connect it to the "FAN ON" relay on the Base IO Board. This relay closes
during a fan call.
NOTE: During off-peak (charge) periods, the contact
is closed between "COM" and "NC".
If installing a mechanical thermostat or thermostat with anticipator, a resistor kit is required
(Order Item #1190015).
G E
W
COM
Peak Control Connections
RP
AP
P NONC
RSSC
RS
SC
Relay
Auxiliary Control Relay
OS
OS
Terminals for Connection as a Conventional Furnace
Y2
Terminals for Connection with Heat Pump
CR
W
RY
C
Y2
W2GY
O2O
Maximum external load should not
exceed 60 VA on the system's class
II transformer.
IMPORTANT
as a Conventional Furnace
R
TH5110D
G
W
C
Y
Honeywell
Rc
Air Conditioner Connections
(If being used in the application)
C
Y
Optional Freeze Protection
Room Sensor
Outdoor Sensor
RSOS SCGYCWRY2
Terminals for Connection
Comfort Plus 12 Position Terminal Block