CALEFFI SATK40103HE Kurulum, Devreye Alma ve Bakım Talimatları - Sayfa 10
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Maintenance
All maintenance procedures should be carried out by an authorised
technician.
Regular maintenance guarantees better efficiency and helps to
save energy.
Before carrying out any maintenance, repair or part replacement
work, proceed as follows:
- Cut off the electric supply
- Remove the cover
- Close the shut-off valves
- Empty the heat interface unit using the drain cocks provided.
Heat exchanger replacement
- Remove the heat exchanger, loosening the 2 hex socket head
screws fixing it in place (A)
- Replace the heat exchanger and the O-rings.
- Tighten the two fixing screws (A).
N.B. The pins fixing the heat exchanger are positioned in such a way
as to allow it to be placed only in the correct direction.
A
Strainer cleaning
All the HIUs have strainers on the inlet for water from the centralised
system and on the secondary circuit.
To clean these strainers, carry out the following maintenance
procedure:
- Unscrew the cap (B)
- Remove the mesh strainer and discard any impurities
- Refit the mesh strainer
- Refit the cap and tighten it.
B
Temperature probe replacement
- Disconnect the probe cable, lightly folding the tab (C) and
extracting the connector (see page 9, ref. 3-7)
- Unscrew the probe
- Fit the new probe
- Reconnect the connector respecting the only possible way it can
be inserted.
Replacing the valve actuator
- Disconnect the actuator cable, lightly pressing the tab on the
connector and extracting it (see page 9, ref. 4-8)
- Extract the fixing clip (D) and then the actuator
- Position the new actuator (E)
- Insert the fixing clip, respecting the correct direction
- Reconnect the connector.
A
Replacing the valve obturator
- Disconnect the valve actuator (see previous paragraph)
- Extract the obturator by unscrewing the locking nut (F)
- Replace the obturator and screw on the locking nut (F), then
insert the actuator
- Insert the fixing clip, respecting the correct direction
- Reconnect the connector.
Vessel pre-charge check
For correct operation of the system periodically check (at least
once every six months) the vessel pre-charge value. Perform check
by means of the following actions:
- Close the shut-off valve
- Empty the HIU using the drain cocks provided.
- Use a pressure gauge to check the pre-charge value
- If necessary, restore the pre-charge value shown in the technical
specifications.
When carrying out maintenance on the electrical part, for the
connections follow the diagram on page 9.
After concluding maintenance, proceed with the filling and
checking operations described in the chapter "Commissioning" on
page 4 and fit the cover.
If you require any information regarding spare parts, please contact
Caleffi spa.
10
C
D
E
F