Lennox AIRCOOLAIR KNCK 24E - Page 21

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Power supply
Common Fan Heat/ Cool
(**)
E. HEATER Compressor
DOUBLE CIRCUIT UNIT, VFC VERSION
Power supply Common Fan Heat / Cool
(Second stage
electrical heater (**) CM2 CM1 First stage electrical heater
SINGLE CIRCUIT UNIT, STANDARD VERSION
SINGLE CIRCUIT UNIT, VFC VERSION
When unit switches off, the system will show CM, CM1 and CM2
failure signal.
* Remove wire, if ON/OFF remote is used.
Compressor alarm may indicate thermic CM, CFM, High pressure,
Low pressure.
Ambient thermostat
signals or digital
inputs BMS system
Unit's functioning mode signals Unit's functioning mode signals
The electrical box of all the range, lets you obtain the following functions:
- Remote ON / OFF.
- Alarm and failure signals for the unit's components: FM, CM.
- The unit's functioning mode signals: FM,CM, EH.
- Dirty air filter indication (option).
- Manage the unit operation, through the supplied thermostat or through the digital inputs for a BMS system (only
for VFC unit version).
C: Common
FM: Indoor fan
RFM:
Return fan motor
CM: Compressor
CM1: Compressor 1
CM2: Compressor 2
EH1: Electrical heater 1
EH2: Electrical heater 2
2.- INSTALLATION
2.6.- ELECTRICAL CONNECTIONS
ELECTRICAL CONNECTION " REMOTE SIGNALS"
67 69 71
67 69 71
*
*
*
*
C FM/RFM FM CM EH
Dirty
filter
alarm
REMOTE
ON/OFF
C FM/
RFM
FM CM EHCM
DOUBLE CIRCUIT UNIT, STANDARD VERSION
C FM/
RFM
FM CM1 EH1
CM1 CM2
CM2 EH2
Cooling only unit
C FM/
RFM
FM CM1 EH1
CM1 CM2
CM2 EH2
Cooling only unit
REMOTE
ON/OFF
ELECTRICAL BOX OF THE UNIT
ELECTRICAL BOX OF THE UNIT
ELECTRICAL BOX OF THE UNIT
ELECTRICAL BOX OF THE UNIT
Smoke
alarm
Dirty
filter
alarm
Smoke
alarm
Dirty
filter
alarm
Smoke
alarm
Dirty
filter
alarm
Smoke
alarm
90 91 92 93
REMOTE
ON/OFF
60 61 64 65
Alarm and
failure signals
Unit's functioning mode signals
92
93
A
BCDEFGH
60 61 64 65
Alarm and
failure signals
Unit's functioning mode signals
62
90 91 92 93
REMOTE
ON/OFF
60 61 64 65 67 69
Alarm and
failure signals
62 63 66 68
C
RGOY1Y2W3
60 61 64 65 67 69
Alarm and
failure signals
62 63 66 68
92
93
Ambient thermostat
signals or digital
inputs BMS system
Optional
Optional
Optional
Optional
T +
T
-
T +
T
-
Thermostat connection
Thermostat connection
** Heat
pump
** Cooling
only
71
71