Supplied By www.heating spares.co Tel. 0161 620 6677
50
FLUE SENSOR
51
PLATE HEAT EXCHANGER
FLUE
SENSOR
PLATE HEAT EXCHANGER AND
FILTER (CBX APPLIANCES ONLY)
9.17
Refer to Figure 51
a)
Ensure supply voltage is isolated.
b)
Drain down the appliance; refer to section 9.24.
c)
Close the DHW inlet isolating cock, open a DHW tap at the lowest
point in the system and allow the pressure to dissipate. Close this
tap again.
d)
Undo the nut connecting the flow pipe from the main heat exchanger
to the plate heat exchanger, and rotate in an anticlockwise direction
to give access to the filter.
e)
Lift out the filter and clean under a tap.
g)
Refit the filter, or replace as necessary, and re-assemble in reverse
order; ensure that all joints and seals are correctly re-fitted.
h)
If it is suspected that the plate heat exchanger is blocked or is
leaking then proceed as follows:
i)
Undo the nut connecting the pipe from the hydroblock to the plate
heat exchanger, and rotate out of the way.
j)
Undo the nut connecting the plate heat exchanger to the CH flow
water isolating cock pipe.
k)
Undo the nut connecting the plate heat exchanger to the DHW outlet
pipe.
l)
Undo the nut connecting the plate heat exchanger to the DHW water
isolating cock pipe.
m)
Lift up the plate heat exchanger and remove.
n)
Fit the replacement plate heat exchanger, using new case seals as
necessary, ensuring the filter is fitted.
o)
Re-assemble in reverse order; ensure that all joints and seals are
correctly re-fitted.
p)
Open the isolating cocks and vent air from the system using the
manual air vent. Re-pressurise the system as necessary and check
for water leaks.
PRIMARY
FLOW PIPE
FIBRE
WASHER
FILTER
PLATE HEAT
EXCHANGER
CONDENSATE DRAIN SYSTEM
9.18
Refer to Figure 27
a)
Ensure supply voltage is isolated.
b)
Open the drain sump cap, while holding a receptacle beneath to
capture any condensate.
c)
Disconnect the condensate drainpipe from the appliance.
d)
Undo the two locknuts holding the system in place.
e)
Unclip the hose from the support bracket.
f)
Detach the condensate drainpipe sump adaptor, by gently pulling
down.
g)
Remove the condensate drain system, clean or replace as necessary.
h)
Re-assemble in reverse order; ensure that all joints and seals are
correctly re-fitted.
PRESSURE GAUGE
9.19
Refer to Figure 24
a)
Ensure supply voltage is isolated.
b)
Drain down the appliance; refer to section 9.24.
c)
Disconnect the pressure gauge capillary from the pressure relief
valve.
d)
Disengage the pressure gauge from the fascia panel, and remove the
gauge.
e)
Fit the new pressure gauge and re-assemble in reverse order.
f)
Open the isolating cocks and vent air from the system using the
manual air vent. Re-pressurise the system as necessary and check
for water leaks.
AUTO AIR VENT
9.20
Refer to Figure 47
a)
Ensure supply voltage is isolated.
b)
Drain down the appliance; refer to section 9.24.
c)
Disconnect the vent tube from the auto air vent and check that it is
free from blockage.
d)
Unscrew the auto air vent, and fit replacement.
e)
Re-assemble in reverse order; ensure that all joints and seals are
correctly re-fitted.
f)
Open the isolating cocks and vent air from the system using the
manual air vent. Re-pressurise the system as necessary and check
for water leaks.
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751030 MANUAL (NEW) 21/9/10 08:41 Page 15
