13
a)
Thermal Cut-Out
b)
Heat Exchanger
c)
Flow Valve
d)
Pressure Relief Device
e)
On/Off Solenoid Valve
f)
Pressure Switch
g)
Terminal Block x 2
h)
Detachable Backplate Section
i)
Water Inlet
j)
Water Outlet
k)
Wall Fixing Key-Hole Slot
l)
Alternative key-Hole slot
m)
Wall Fixing Slot
n)
Relay
(3500M only)
o)
Timer PCB
(3500M only)
p)
Start / Stop switch
q)
Inlet filter
r)
Brass end stop
15
