IDEAL LOGIC CODE COMBI ESP1 26, Installation And Servicing

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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 DHW circuit: As there is no direct drain for the DHW
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, open the DHW isolation valve and open all system
isolating valves (re-pressurise as appropriate by re-connecting the filling loop, refer to Section 2.15) before
proceeding to check operation of the boiler.
5. Disconnect filling loop. Refer to Section 2.15.
6.
Check operation of the boiler. Refer to Sections 2.22 & 2.23.
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 by re-connecting the filling loop, refer
to Section 2.15) before proceeding to check operation of the
boiler.
5. Disconnect filling loop. Refer to Section 2.15.
6. Check operation of the boiler. Refer to Sections 2.22 & 2.23.
Filling Loop
Gas CH
Return
DHW
Inlet
DHW
Outlet
CH Circuit
Drain CH
Flow
1.
Refer to Section 3.8.
2. Drain the heating system. Refer to Section
3.21.
3. Remove the boiler front (See Sections 3.2 &
3.19), 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 2.15.
8. Check that the boiler operates in both DHW &
CH modes.
3.22 PRESSURE GAUGE REPLACEMENT
4
5
SER
VICING