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Aircom Relays
The Aircom circuit board has three available “dry contact”
relays. Contact 3 is not available.
Maximum 115V 10 amp resistive load.
Contact 1
This relay is a dry contact (no power supplied from board).
The relay switches upon a call for heat.
This relay can be used to switch the heat demand signal for
boiler operation.
Power (if required) must be supplied to common from an
external source.
Max. voltage - 120 volts
Max. Amperage - 10 amps
T30T29T28
T43
SPARE
P2 P3
F2 MAX 2 amp
R
24Vac
Defrost
Freeze
K7 K1 K2K8
T31
T32
T33
T34
T35
T36
T37
T38
T39
T40
T41
T42
Contact 1
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
Contact 2 Contact 3 Contact 4
N.C
Boiler
Contact
T30T29T28
T43
SPARE
P3
MAX 2 amp
R
24Vac
Defrost
K7 K1 K2K8
T31
T32
T33
T34
T35
T36
T37
T38
T39
T40
T41
T42
Contact 1
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
Contact 2 Contact 3 Contact 4
N.C
Humidifier
Contact
Contact 2 and 4
These relays are dry contacts (no power supplied from
board). The relays switche whenever the CAF blower motor
is operating.
These relays can be used to interlock Humdifiers, Air
Cleaning Equipment, etc.
Power (if required) must be supplied to common from an
external source.
Max. voltage - 120 volts
Max. Amperage - 10 amps