Benchmark Procombi A Series Installation & Servicing Instructions Manual page 20

6.20.1 DHW FLOW RESTRICTOR (fig. 32A)
Carry out the component removal procedure as
described in 6.4.
Disconnect the cold water inlet pipe at the DHW
flow switch (A). Using a small screwdriver, gently
ease the flow restrictor (B) from its seating. Re-
place in the reverse order. Ensure all seals are in
good condition, taking care to ensure they are
replaced correctly.
C
fig. 32A
6.20.2 DHW FLOW SWITCH (fig. 32A)
Carry out component removal procedure as de-
scribed in 6.4.
Remove the locking pin (C). Disconnect and re-
move the cold water inlet pipe from the DHW flow
switch & DHW heat exchanger. Disconnect the
wiring to the DHW flow switch. Slacken and
unscrew the inlet connection. Unscrew the nut (D).
Lift the DHW flow switch housing from its seating.
If necessary remove the locking pin (E) from the
DHW flow switch, taking care not to lose the float
contained within the housing.
Replace in the reverse order ensuring that the
housing is firmly inserted onto its seating. Ensure
all seals are in good condition, taking care to
ensure they are replaced correctly.
H
fig. 32B
6.20.3 VALVE ACTUATOR (fig. 32B)
Carry out component removal procedure as de-
scribed in 6.4.
Remove the locking pin (F) that secures the
actuator (G) to the heating manifold. Disconnect
the electrical plug from the actuator. Replace in
the reverse order.
18
A
B
E
D
I
F
G
6.20.4 DHW THERMISTOR (fig. 32B)
Carry out component removal procedure as de-
scribed in 6.4.
Locate and remove the thermistor locking pin (H).
Gently ease the thermistor assembly (I) from the
hydraulic manifold. Replace in the reverse order.
6.20.5 DIVERTOR VALVE ASSEMBLY (fig. 33)
Carry out component removal procedure as de-
scribed in 6.4. Remove the valve actuator as de-
scribed in 6.20. Locate and remove the locking
pin (A) that secures the valve housing cover to
the hydraulic manifold. Gently prise the valve as-
sembly from the manifold. Replace in the reverse
order ensuring that the seating assembly is in-
serted properly. Ensure all seals are in good con-
dition, taking care to ensure they are replaced
correctly.
A
Fig. 33
6.21 INTEGRAL TIME SWITCH (if fitted)
Carry out component removal procedure as de-
scribed in 6.4.
Locate and remove the PCB cover and securing
screws (fig. 34-35), locate and remove the time
clock retaining screws, remove time clock. Dis-
connect wiring after carefully taking note of all
electrical connections. Replace in the reverse
order.
Fig. 34
Fig. 35
M
M
CLK-1
CLK-4