21
2.7
BOILER ELECTRICAL (fig. 11)
TA2 (24 VRAC)
TA1 (24 VRAC)
SB/SA
(5 VDC)
SE (5 VDC)
TS (24 VDC)
SM (5 VDC)
SF (5 VDC)
SR (5 VDC)
RS-485 (24 VAC)
OP (24 VAC)
TPA
V
EV 1-2
TFU
CR
0...10 VDC
TRA
EA
ER
PI
Fig. 11
KEY
F1-2
Fuse (4 AT)
TRA Ignition
transformer
PI Boiler
pump
V Fan
EA
Ignition electrode
ER
Ionisation electrode
EV1-2
Gas valve coil
TS Safety
thermostat
SF
Fumes temperature sensor
TFU
Thermal fuse
SM
Flow temperature sensor
SR
Return temperature sensor
TPA Pressure
transducer
JP1
Selection TA2 or 0-10 VDC
(See note below).
TA1
Zone 1 environment thermostat
TA2
Zone 2 environment thermostat
SB
Sensor tank L. 2000 (optional)
CR
Remote control CR73 (optional)
SE
External sensor (optional)
OP
Programming clock (optional)
AR Remote
alarm
VZ Zone
valve
AUX Auxiliary
connection
SA
Frost detector
(external version only)
RS-485 CASCADE/MODBUS
board
CONNECTOR SPARE PART CODES:
CN1
code 6319162
CN2
code 6319168
CN3
code 6319164
CN4
code 6316203
CN6
code 6316202
CN7
code 6316204
CN10
code 6319165
CN12
code 6319166
CN13
code 6319167
CN14
code 6319169
"NOTE - JP1 link
With JP1 link fi tted TA2 input is by operation of a clean contact.
For operation by a BMS (0-10v dc) signal, JP1 must be removed, TA1 link fi tted and the BMS connected, +ve to termi-
nal 10 - CN6, -ve to terminal 4 - CN4.
PAR 14 will require setting to the maximum fl ow temperature required."