Illustrated Wiring Diagram - Keston K170 Installation And Servicing Instructions

WD51/2/1997 Chapter 5 : Fault FindingThe Keston 170 Condensing Boiler
5.6

ILLUSTRATED WIRING DIAGRAM

ILLUSTRATED WIRING DIAGRAM
Boiler Stat
7W
Low Water Pressure Switch Gas Low
Ignition Electrode
Flue Overheat Stat
8W
PUMP
L
15
N
14
13
12
11
10
9
8W
8
7W
7
6B
6
5
N
4
SL
3
2
PL
1
FILTER
Installation & Servicing Instructions
Flow Overheat Stat Thermal Fuse
51PK
52BK
Flow High
Limit Stat
Gas Valve
W
room
( )
stat
6BR
5BR
Lockout
4B Lamp
9G
3BR
ON/OFF
Run
SWITCH
Lamp
56R
92OR
93OR
Pressure Switch
11W
12B
BR
B
Blower
Page : 32
RAM
Control
1
2
3
4
5
6
G/Y
7
8
9
10
10BK
55BR
Air Pressure Switch
8W
6BR
Relay
BR
B
G/Y