WarmFlow Utility U70HE - Page 40

Page 38
3.3.2 Wiring Schematic
BURNER
D.H.W. PUMP
C.H. PUMP
TRIPLE POLE RELAY
N.C.
BOILER STAT
N.O.
N.C.
N.O.
N.O.
N.C.
C
C
C
COIL
7
20 21
2425
22
14
N N N
N
N
10
8
1
26
29
N
26
28
30
3 19
23
17
18
16
5
L1
N
E
L1
N
MAINS PLUG
H.W.
C.H.
TANK STAT
FLOW SWITCH
TANK LIMIT
STAT
9
BOILER LIMIT STAT
15
2
13
1
6 4
MAINS ON
LAMP
(GREEN)
H/L RESET
LAMP
(YELLOW)
LOCKOUT
LAMP
(GREEN)
LAMP
7
16
BOILER LIMIT STAT
15
H/L RESET
LAMP
(YELLOW)
BREAK INTO THE WHITE
WIRE BETWEEN NO 16 ON
THE PCB AND THE LIMIT
STAT AND CONNECT IN THE
PRESSURE SWITCH WITH A
WIRING BLOCK AS SHOWN
LOW PRESSURE
SWITCH
LOW PRESSURE
SWITCH
WIRING A LOW PRESSURE SWITCH
12
WIRING
BLOCK
COIL
N
11
PUMP OVER
RUN STAT
PUMP OVER
RUN RELAY
27
WIRING
BLOCK
NC
NO
C
2
4
3