Steffes 6140 - Manual (Page 21)

Comfort Plus Commercial Installation
n
3.12
Installation
AUXILIARY LOAD CONTROL
The Comfort Plus Commercial System 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 low voltage
terminal block in the electrical compartment of the system.
(See Figure 17.) These contacts are rated for 30 volts, 3
amps maximum.
Maximum external load should not
exceed 60 VA on the system's class
II transformer.
IMPORTANT
TWO STAGE HEAT PUMP APPLICATION WITH VARIABLE SPEED BLOWER
FIGURE 16
TYPICAL AUXILIARY LOAD CONTROL
FIGURE 17
NOTE: During off-peak (charge) periods, the con-
tact is closed between "COM" and "NC".
W/
NO NC COM Ou
td
oo
r
Ou
td
oo
r
C R H/E Y2 Y1 AUX O G RP
2 2
Y1 Y2
2
O AP P
Inputs
Peak Aux.
Relay
Auxiliary Control Relay
Relay Contacts
Relay Coil
COM NO/NC
COM NO/NC
БВ
Б
В
Б
Г
ГВ
Д
ГВД

        
ЖЗИИЙ
И
 БД
  Е ! " #$
Б Б
 
Б
! Е$ $

   
! "" #$%&
    ' () 
( * 
  + ) ,("
  ! , " ()
  ! , " () 
    ' () 
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-  
* (.  
"(
/0      +  ("" 
IMPORTANT
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HUMIDIFIER/ELECTRONIC FILTER INSTALLATION
The Comfort Plus Commercial system is capable of being connected to a humidifier and/or an electronic air
filter. If installing either of these devices, connections to the system are made to the bottom two relays on the
base I/O relay board inside the system's electrical panel. Refer to the Line Voltage Wiring Diagrams (Pages
A.03-A.04) for the location of these relays.
If installing a humidifier, connect it to the "HEAT CALL" relay. This relay closes during a heat call.
If installing an electronic air filter, connect it to the "FAN ON" relay. This relay closes during a fan call.
Thermostat
Stage
Thermostat
Output
Heat
Pump
Stage
% of
Selected
CFM
Heat Call
Status on
Digital Display
Discharge Air
Temperature
Target
1 Y1/G 1 50% HC1 L048
2 Y1/Y2/G 2 100% HC1 L048
3 Aux/Y1/Y2/G 2 100% HC3 L049
Fan G 0 400 cfm HCF N/A
Cool 1 Y1/G/O 1 50% COOL N/A
Cool 2 Y1/Y2/G/O 2 100% COOL N/A
Emergency
Heat H/E N/A 100% HC3 L049
*Contractor Use Only
TWO STAGE HEAT PUMP