23
3. ELECTRICAL
DIAGRAMS
LEGEND:
A = Central Heating Temperature Adjustment
B = Domestic Hot Water Temperature Adjustment
C = Soft-light Adjustment
D = Maximum Heating Adjustment
E = Time Clock Connector
F = On/Off Switch
G = Fume Sensor L.E.D.
H = Central Heating Selector
I = Ignition Failure (Lockout) L.E.D.
J = On/Off L.E.D.
K = Reset Button
L = Central Heating L.E.D.
M = Transformer
N = Circulation Pump Relay
O = Fan Relay
P = Gas Valve Relay
Q = Spark Generator I.C.
A01 = Circulation Pump
A02 = Fan
A03 = Spark Generator/Gas Valve Supply
A04 = Flame Detection Circuit
A05 = Detection Electrode
A06 = Main Circuit Temperature Probe
A07 = Domestic Hot Water Temperature Probe
A08 = D.H.W. Flow Switch
A09 = Pump Pressure Switch
A10 = Modulator
A11 = Air Pressure Switch
A12 = Safety Thermostat
A13 = External (Room) Thermostats
Colours:
Gry = Grey
Wh = White
Pnk = Pink
Brn = Brown
Bl = Blue
Blk = Black
Rd/Blk = Red/Black
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