59
Installation and Servicing
SECTION 3 - SERVICING
3.24 DRAINING THE BOILER
CENTRAL HEATING CIRCUIT
1. Close all the CH water isolating valves on the boiler inlet.
2. To drain the primary heat exchanger circuit: Open the drain point by
unscrewing using a flat blade screw driver and attach a length of drain hose.
3. 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 Secton 2.15) before
proceeding to check operation of the boiler.
4. Disconnect filling loop. Refer to Section 2.15.
5. Check operation of the boiler. Refer to Sections 2.24 to 2.27.
DOMESTIC HOT WATER CIRCUIT
1. Close the DHW water isolating valve on the DHW inlet.
2. 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.
3. After replacing any component on the boiler open the DHW inlet isolating valve and vent the DHW system by opening all hot
taps and ensuring water flows from each tap.
4. Disconnect filling loop. Refer to Secton 2.15.
5. Check operation of the boiler. Refer to Sections 2.24 to 2.27.
1. Set both the user temperature selector
knobs to the 12 o’clock position.
2. Refer to Sections 3.2 & 3.3.
3. Remove the two screws securing the controls
housing lid. Refer to Section 3.21.
4. Remove the electrical cover at the clips
indicated. Refer to Section 3.21.
5. Disconnect the 2 electrical connectors
carefully.
6. Remove PCB from mounting posts by
releasing the 4 clips.
7.
Replace the PCB and refit in reverse order.
8. Check the operation of the boiler. Refer to
Sections 2.24 to 2.27.
3.22 USER PCB REPLACEMENT
1
3.23 DHW FLOW TURBINE SENSOR REPLACEMENT
Filling Loop
DHW
Inlet
CH
Flow
DHW
Outlet
Gas
CH
Return
CH
Drain
1.
Refer to Sections 3.2 & 3.3.
2.
Drain the DHW system. Refer to
Section 3.24.
3.
Pull off and remove the retaining
clip.
4.
Use the clip to ease the turbine
sensor from its housing.
5.
Re-assemble in reverse order.
6.
Check that the boiler operates in
both DHW & CH modes. Refer to
Sections 2.24 to 2.27.
3
4
6
SER
VICING
Содержание VOGUE MAX COMBI 26
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