Features and technical data
Installation, use and maintenance manual – GAHP A
13
1
Figure 1.8
Wiring diagram of the appliance with standard fan
SCH1
Controller S61
SCH2
W10 circuit board
SCH3
Mod10 circuit board
TER
Power supply terminal block
CNTBOX Flame controller
PWRTR Board transformer
BLW
Blower
PMP
Oil pump
IGNTR
Ignition transformer
IGN
Ignition electrodes
FLS
Flame sensor
LS
Gas valve ON indicator lamp
GV
Gas solenoid valve
TC
Manual flue gas thermostat
TL
Generator limit thermostat
FM
Flowmeter
CWS
Condensate water sensor
VD
Defrosting valve
FAN
Fan
C
Fan capacitor
(not in the low-noise unit)
THRC
Hot water return temperature probe
THMC Hot water flow temperature probe
TMIX
Combustion air temperature sensor
TA
Ambient air temperature sensor
TG
Generator temperature sensor
TF
Fumes temperature sensor or generator fin
sensor
TEVA
Evaporator outlet temperature sensor
MA
Terminal block
REED
Oil pump rotation sensor
1.5
ELECTRONIC BOARDS
1.5.1
Electronic boards (S61+Mod10)
The unit's electrical board contains:
▶
Electronic board S61 (Figure 1.9 p. 14), with micropro-
cessor, it controls the appliance and displays data, messages
and operative codes. The appliance is monitored and pro-
grammed by interacting with the display and the knob.
▶
Auxiliary Mod10 electronic board (Figure 1.10 p. 15),
overlapping S61, it handles power modulation of the burner,
fan and water circulation pump.
▶
Satellite W10 electronic board (Figure 1.11 p. 15), inter-
connected to the S61 board and located next to it, used to
control defrosting operations of the GAHP unit.
Summary of Contents for GAHP A indoor
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