20
Alpha HE CB25/33, SY25 - Commissioning
5 COMMISSIONING
When commissioning the boiler, ensure the Benchmark Log Book is completed.
5.1
FILL THE SYSTEM
1.
The boiler is fitted with an automatic air vent positioned on the pump (see Fig. 2). The vent is always open and has no
sealing cap.
2.
Open the central heating flow and return valves (slot in-line with valve) (see Fig. 13).
3.
Open the fill point valve on the filling loop until water is heard to flow. To aid venting, the boiler drain point (see Fig. 2) may
be opened until water flows out. Close the drain point as soon as water appears.
4.
To remove the air - Vent each radiator in turn, starting with the lowest in the system.
5.
It is important that the pump is properly vented to avoid it running dry and damaging its bearings. Unscrew and remove the cap
from the centre of the pump. Using a suitable screwdriver rotate the exposed spindle about half a turn, then replace the cap.
6.
Check the operation of the pressure relief valve (see Fig. 2) by turning the head anti-clockwise until it clicks. The click is
the valve lifting off its seat allowing water to escape from the system - check that this is actually happening.
7.
Continue to fill the system until the pressure gauge indicates 1.0 bar. Close the fill point valve and check the system for
water soundness, rectifying where necessary. Disconnect the filling loop from the mains supply.
Water may be released from the system by manually operating the drain point (see Fig. 2) until the system design
pressure is obtained. The system design pressure (cold) should be between 0.75 and 1.25 bar.
Refer to Sections 3.7 and 3.8. System volume, Flushing and Filling the system.
8.
Open the mains water inlet valve (see Fig. 13). Turn on all hot water taps and allow water to flow until no air is present.
Turn off taps.
9.
Ensure that the condensate trap has been filled with water. Refer to Section 4.5, paragraph 4.
5.2
BOILER CONTROLS - Fig. 22a or Fig. 22b
Fig. 22a - Alpha HE CB25/33
Fig. 22b - Alpha HE SY25
Содержание Benchmark HE CB33
Страница 33: ...33 9 1 HE CB25 33 ILLUSTRATED WIRING DIAGRAM Alpha HE CB25 33 SY25 Wiring Diagrams 9 WIRING DIAGRAMS...
Страница 34: ...34 Alpha HE CB25 33 SY25 Wiring Diagrams 9 2 HE SY25 ILLUSTRATED WIRING DIAGRAM...
Страница 35: ...35 9 3 HE CB25 33 FUNCTIONAL FLOW WIRING DIAGRAM Alpha HE CB25 33 SY25 Wiring Diagrams...
Страница 36: ...36 9 4 HE SY25 FUNCTIONAL FLOW WIRING DIAGRAM Alpha HE CB25 33 SY25 Wiring Diagrams...
Страница 38: ...38 Alpha HE CB25 33 SY25 Fault Finding 10 3 DOMESTIC HOT WATER HE CB25 33 only Follow operational sequence...
Страница 39: ...39 Alpha HE CB25 33 SY25 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F...
Страница 40: ...40 Alpha HE CB25 33 SY25 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to J...
Страница 41: ...41 Alpha HE CB25 33 SY25 Fault Finding 10 6 FAULT FINDING SOLUTION SECTIONS K to L...
