Hamworthy Wessex 100 M100 Installation, Commissioning And Servicing Instructions page 18

Figure 8.12 Site Wiring Diagram
1) SINGLE BOILER INSTALLATION, ON/OFF OR HIGH/LOW OPERATION VIA REMOTE TIME CLOCK CONTROL.
230V AC 50Hz
SUPPLY
N
FUSED ISOLATOR
N
L
2) MULTIPLE BOILER INSTALLATION, ON/OFF OR HIGH/LOW OPERATION VIA HAMWORTHY HEATING LIMITED MILTON BOILER SEQUENCE CONTROL.
NOTE: ROTARY SWITCH 'SW1' ON THE SEQUENCING INTERFACE MODULE - POSITIONS '1' TO '9' SETS THE BOILER FIRING ORDER.
BOILER NUMBER 1
SEQUENCING INTERFACE MODULE
SEQUENCING INTERFACE MODULE TERMINALS
BOILER PCB TO 'SIM'
INTERFACE TERMINALS
1 2 3 4 5
WIRING HARNESS
TO BOILER MAIN PCB
CONNECTOR 'C1-C8'
BOILER MAIN SITE BOILER PCB PLUG/
WIRING TERMINALS SOCKET TERMINALS
230V AC 50Hz 230V AC 50Hz
SUPPLY
N L G1
INTERLOCK
CONTROLS
N
L
NOTE: VOLT FREE CONTACT TERMINALS
NOT SHOWN FOR CLARITY.
3) MULTIPLE BOILER INSTALLATION, ON/OFF OR HIGH/LOW OPERATION VIA NON HAMWORTHY HEATING LIMITED BOILER SEQUENCE CONTROL.
BOILER NUMBER 1
BOILER SITE WIRING TERMINALS
BOILER MAIN SITE BOILER PCB PLUG/
WIRING TERMINALS SOCKET TERMINALS
230V AC 50Hz 230V AC 50Hz
SUPPLY OUTPUT
N L G1 G2
SEQUENCER
BLR 1 ON/OFF
CONTACT
N
L
HAMWORTHY HEATING LTD
BOILER SITE WIRING TERMINALS
BOILER MAIN SITE WIRING TERMINALS - PLUG BRACKET
VOLT FREE SIGNAL OUTPUTS
RATED UP TO 250V AC 5A
L 15 16 17 18 19 20
LOW VOLTAGE
ROTARY SWITCH
INPUTS/OUTPUTS
SW1
8
6 7 8 9 10
NOT
UTILISED
OUTPUT
G2 G3 G4
SAFETY
BOILER MAIN SITE
WIRING TERMINALS
230V AC 50Hz
SUPPLY
G3 G4 N
SEQUENCER
BLR 1 HIGH/OW
CONTACT
SAFETY
INTERLOCK
CONTROLS
N
BOILER PCB PLUG/
SOCKET TERMINALS
230V AC 50Hz
OUTPUT
21 31 32 33 34 G1 G2
SAFETY INTERLOCK
SEQUENCING INTERFACE MODULE
SEQUENCING INTERFACE MODULE TERMINALS
BOILER PCB TO 'SIM'
INTERFACE TERMINALS
1 2 3 4
WIRING HARNESS
TO BOILER MAIN PCB
CONNECTOR 'C1-C8'
BOILER MAIN SITE
WIRING TERMINALS
230V AC 50Hz
SUPPLY
N L
N
L
BOILER NUMBER 2
BOILER SITE WIRING TERMINALS
BOILER PCB PLUG/
SOCKET TERMINALS
230V AC 50Hz
OUTPUT
L G1 G2 G3 G4
SEQUENCER
BLR 2 HIGH/OW
CONTACT
SEQUENCER SAFETY
BLR 2 ON/OFF INTERLOCK
CONTACT CONTROLS
L
12
WESSEX 100 M
G3 G4
REMOTE CONTROL LOOPS.
NOTE: TERMINALS 'G1' AND 'G3' ARE
SUPPLIED WITH 230V AC.
MAINS VOLTAGE MUST NOT
ONTO THESE TERMINALS!
REMOTE
CONTROLS TIME CLOCK
BOILER NUMBER 2
LOW VOLTAGE
ROTARY SWITCH
INPUTS/OUTPUTS
5 6 7 8 9 10
NOT
UTILISED
BOILER PCB PLUG/
SOCKET TERMINALS
230V AC 50Hz
OUTPUT
CN16
G1 G2 G3 G4
SAFETY
INTERLOCK
CONTROLS
BOILER NUMBER 3
BOILER SITE WIRING TERMINALS
BOILER MAIN SITE
WIRING TERMINALS SOCKET TERMINALS
230V AC 50Hz
SUPPLY
N L G1
N
L
BE FED
SW1
8
TO HAMWORTHY HEATING LIMITED
MILTON BOILER SEQUENCE CONTROL
(REFER TO MILTON INSTALLATION
MANUAL FOR FURTHER DETAILS)
BOILER PCB PLUG/
230V AC 50Hz
OUTPUT
G2 G3 G4
SEQUENCER
BLR 3 HIGH/OW
CONTACT
SEQUENCER SAFETY
BLR 3 ON/OFF INTERLOCK
CONTACT CONTROLS
500001080/F