49
Installation and Servicing
SECTION 3 - SERVICING
3.21 DRAINING THE BOILER
DOMESTIC HOT WATER CIRCUIT
1.
Refer to Section 3.8.
2.
Close all the DHW water isolating valves on the boiler inlet.
3.
To drain the domestic hot water circuit: As there is no direct drain for the domestic hot water circuit, depending on the location
of the boiler, opening the lowest hot water tap may drain this circuit. However it must be noted that some residual water will be
experienced during replacement of components.
4.
After replacing any component on the boiler, close tap, close the drain valve and open all system isolating valves re-pressurise
as appropriate before proceeding to check operation of the boiler.
5.
Check that the boiler operates in both DHW & CH modes.
CENTRAL HEATING CIRCUIT
1.
Refer to Section 3.8.
2.
Close all the CH water isolating valves on the boiler inlet.
3.
To drain the primary heat exchanger circuit: Open the drain
valve and attach a length of hose to the CH drain point.
4.
After replacing any component on the boiler, remove the
hose, close the drain valve and open all system isolating
valves re-pressurise as appropriate before proceeding to
check operation of the boiler.
5.
Check that the boiler operates in both DHW & CH modes.
1.
Refer to Section 3.8.
2.
Drain the heating system. Refer to Section
3.21.
3.
Remove the boiler front (See Section 3.8),
lower the control panel and remove the
control box cover.
4.
Ensuring there is no pressure in the system
unclip the C clip from the flow manifold port
and remove the capillary connection together
with ‘o’ ring.
5.
Releasing the two retaining clips on the
pressure gauge ease the pressure gauge
through the front of the control panel.
6.
Fit the new pressure gauge from the front of
the control panel ensuring correct orientation.
Locate push fit connection into port ensuring
‘o’ ring in place and secure with the C clip.
7.
Refill the boiler. Refer to Section 2.16.
8.
Check that the boiler operates in both DHW &
CH modes.
3.22 PRESSURE GAUGE REPLACEMENT
4
5
CH Circuit
Drain
Condensate
Drain
CH
Flow
Gas DHW
Inlet
DHW
Outlet
CH
Return
SER
VICING
Содержание i-mini C24
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