Morco FEB-24ED - Main PCB and Connections

Description of functioning
technical
10
3.1.2.- Main P.C.B (Part number MCB3000)
1 DHW ANTI-FREEZING RELAY (J24) (NOT USED ON FEB-24ED)
2 GAS VALVE 1 RELAY. EV1 (J25) (220VAC)
3 GAS VALVE 2 RELAY. EV2 (J25) (220VAC)
4 PUMP RE
LAY (J17)
5 FAN RELAY (J18)
6 “Opto triac” SPARKS
(J25)
7 TRANSFORM
ER (Ionisation. 70-80V AC)
8 TRANSFORM
ER (MAIN BOARD FUNCTIONS)
9
EARTH
10 MICROPROCESSOR. CONTROL
11 PUSH BUTTON FOR TEST
12 (J4) DIGITAL INPUTS (AIR PRESSURE SWITCH,
H.L.THERMOSTAT, …).
13 (J8)
LOW PRESSURE SWITCH
14 (J6) DHW AND HEATING THERMISTORS, ROOM THERMOSTAT, EXTERNAL PROBE
15
(J22 OR J23) DISPLAY PCB CONNECTOR (3 PURPLE WIRES)
16 (J16) MODULATING GAS VALVE (18VDC)
17 (J27) PORT FOR SOTWARE PROGRA
M
18
AUTO TEST PORT
19 SUPPRESSION FILTER
20 SUPPRESSION FILTER
21 MAIN ELECTRICAL SUPPLY CONECTORS (230V, 50Hz)
9
J22
J18
J17
J25
N
N
L
L
L
L
N
N
L
FAN 230V ac
PUMP 230V ac
MAINS SUPPLY
230Vac
18
GAS VALVE
EV1 230V ac
EV2 230V ac
SPARK 230V ac
85v ac
18v dc return micro switch
18v dc out micro switch
18v dc return air pressure
18v dc out air pressure
18v dc return HL stat
18 v dc out HL stat
18v dc return LPS
18v dc out LPS
TIME CLOCK 0UT 18 v dc
TIME CLOCK RETURN 18vdc