Heatrae Sadia R 45 PLUS 3KW, Инструкция по установке, эксплуатации и обслуживанию

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9. Maintenance
9.1 General
9.1.1 Maintenance requirements
The unit will require an annual maintenance
requirement in order to ensure safe working and
optimum performance. This is of greater importance in
hard water areas or where the water supply contains
particulate matter. Note: If the water is particularly hard
or where there are high concentrations of particulates,
then more frequent maintenance may be required.
The maintenance checks described below should be
carried out annually or as required by a competent
person.
After any maintenance, please complete the relevant
Service Interval Record, page 37.
9.2 Routine inspection & maintenance
operations – Water Heater Draining
WARNING
Any metalwork and exposed pipes may be
hot.
WARNING
Before commencing any servicing or
maintenance including removal of the
access panel at the bottom of the unit
ensure that the electrical power supply
and the domestic hot and cold water
connections are all isolated.
DANGER
The water that is drained from the water
heater could be very hot, up to 100°C,
extreme care must be taken to prevent risk
of scalding.
9.3 Routine inspection & maintenance
operations – Filter Inspection
There are two filters that require inspection, one in
the breather pipe at the top of the water heater and a
second in the water inlet pipe work.
9.3.1 Breather Pipe Filter Inspection
`
Carefully disconnect the Tundish from the breather
pipe by unscrewing the small nut on the 15mm pipe
side of the Tundish.
`
Carefully split the connection between the 15mm
pipe and the Tundish, once apart this will reveal the
mesh filter in the end of the 15mm pipe.
`
Using a torch, inspect the filter for any debris, if
debris is present remove it. If the debris cannot
be removed then the filter must be replaced, see
spares list page 29, spare 13.
9.3.1.1 Breather Pipe Filter Replacement
`
To replace the mesh filter, the 15mm breather pipe
must be removed from the water heater, once
removed, using an appropriate tool, push the filter
from the end of the pipe. Fit the replacement filter
by pushing into the end of the pipe nearest the
Tundish. Refit the pipe and the Tundish.
9.3.2 Inlet Pipe Filter Inspection
`
To inspect this filter, the inlet control assembly must
be removed from the water heater.
`
Disconnect the two earth wires that are connected
to the copper pipe work
Figure 16: Breather pipe filter removal
Figure 15: Access cover removal
25L
x5
45
L & 70L
x6
120L
x8
M5
(Security)
`
Remove the access panel from the bottom of the
heater.
`
Ensure that the drain tap is closed, remove the cap
from the drain valve
`
Using a ¾ BSP female hose adaptor fitted to a
suitable length of hose, connect to the drain valve.
`
Ensure that the other end of the hose is positioned
and secured in a sink, basin or suitable waste
water drain.
`
Open the drain valve and empty the water out of
the heater.
`
Once the water heater is empty, the servicing can
commence.
WARNING
Ensure unit is drained.