Installation Guide Instruction Manual
10
LOW VOLTAGE ROOM THERMOSTAT CONNECTIONS
A 24 VAC thermostat must be used (digital recommended).
1. Disconnect power to the Comfort Plus system.
2. Route low voltage wires from the thermostat to the Comfort Plus System.
3. Insulate thermostat wire wall opening if necessary and attach thermostat to the wall. When using a mechanical
thermostat or thermostat with anticipator, resistor kit #1190015 must be installed to ensure proper operation.
4. Connect low voltage wires from thermostat into terminal block as shown.
Part No. 1200285-6
3050 Hwy 22 North w Dickinson, ND 58601-9413 w www.steffes.com
NOTE: For detailed heat call information, reference the Owner's and Installer's Manual.
11
SOFTWARE CONFIGURATION AND INSTALLERS FINAL CHECKOUT
To ensure proper operation, the system software must be configured for the application. Refer to the Configuration Menu
in the Owner's and Installer's Manual or to the Configuration Guide provided by your local power company. Also, complete the
Installer's Final Checkout Procedure found in the Owner's and Installer's Manual.
Single Stage Heat Pump Application
IMPORTANT
A
B
C
D
W / E
Y1 / Y2
J1
J2
J3
J4
J5
J6
Blower
Speed
Stand Alone Furnace Application with Uncontrolled Air Conditioning
IMPORTANT
A
B
C
D
W / E
Y1 / Y2
J1
J2
J3
J4
J5
J6
Blower
Speed
Two Stage Heat Pump Application
IMPORTANT
A
B
C
D
W / E
Y1 / Y2
J1
J2
J3
J4
J5
J6
Blower
Speed
The W/E Jumper must be installed
Air
To Control Board
D4
Fid 2
Blower
C3
R1
R2
P10
D6
RLY1
P11
D5 D7 D3
Water
W E
Y1 Y2
P5
J3
J2
J1
D2
J4
D1
P6
P4
C
B
A
D
Speed
Blower
J6
J5
P3 P2
P8 P9
Air Conditioner
Connections
(If being used in the
application)
The Y1/Y2 Jumper must be installed
Y
W
G
C
TH5110D
Honeywell
R
cR
Y
Outdoor
W/
Y1AUX G OY2 Y1
RC
H/E
2
O
22
Y2
COM
Outdoor
NO
APPRP
NC
Aux.Peak
Inputs
Relay
C
P1
To Control Board
Comfort Plus
RC
LV Circuit Board
P7
P8
Peak Aux.
Inputs Relay
The Y1/Y2 Jumper must be installed
Honeywell TH5220D
Aux
ELCG O/B RYRc
C - Low Voltage Common
R - Low Voltage Hot
O - Reversing Valve
Y - Compressor
To Heat Pump
Outdoor Sensor
The W/E Jumper must be installed
P9
H/E
RC
Outdoor
Outdoor
COM
NC
NO
W/
D6
RLY1
To Control Board
D4
Fid 2
Blower
To Control Board
Air
C3
P10
R1
R2
P11
D5 D7 D3
Water
Y1 Y2
W E
D2
J3
J2
J1
P5
D1
J4
P6
P4
Speed
Blower
J6
J5
C
B
A
D
P2P3
Y1AUX OGY2 Y1
2
Y2
22
O
CR
Comfort Plus
LV Circuit Board
P7
APPRP
P1
P1
W/
NO
NC
COM
Outdoor
Outdoor
CR
H/E
RLY1
D6
To Control Board
Fid 2
D4
Blower
To Control Board
O
D3
R2
R1
D7D5
P11
W E
Y1 Y2
Water
J4
D1
J1
J2
J3
P10
D2
D
A
B
C
C3
J5
J6
Blower
Speed
P4
P3
AUX
Y2 GY1
O
22
Y2Y1
Air
LV Circuit Board
Comfort Plus
Honeywell TH5320U
RRYCO/BG
Aux
Y2
Y2 - Compressor Stage 2
C - Low Voltage Common
cL
R - Low Voltage Hot
O - Reversing Valve
To Heat Pump
Y1 - Compressor Stage 1
The Y1Y2 Jumper must be removed
P2
RP
2
APP
Aux.
Relay
Peak
Inputs
The W/E Jumper must be installed