Roberts Gorden Dualair DA260G Series, Инструкция по установке, наладке, обслуживанию и эксплуатации

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7.4.2 Removal of Gas Valves
There are two mounting systems used for the automatic ignition gas valves.
i) Honeywell gas valve (for On/Off Burner)
These are connected to the main gas manifold using a navy union and flanges at the valve.
Electrical connection is by a plug on the end of a flying lead.
ii) S.I.T Nova automatic gas valves
These are connected to the main gas manifold using the valve manufacturers angled outlet
flange. Electrical connection is by two pre-wired plugs on a flying lead.
The pilot gas valve is supported on the ¼ BSP inlet pipe and the outlet is a 4mm OD compression
fitting. Electrical connection is by a small three pin plug.
To remove gas valves:
i) Disconnect the pilot gas pipe at the compression fitting at the pilot gas valve.
ii) Disconnect the union between the gas supply pipe and the gas valve.
iii) Disconnect the electrical plugs to all gas valves.
iv) Disconnect the valve outlet flange or union between the gas valve and the burner.
This allows the gas valves to be removed from the heater
To disassemble gas train:
To separate the start and main gas valves remove the screws securing the main gas valve flanges
being careful to retain the screws and "O" ring seal. Using suitable tools unscrew the pilot line from
the main gas line at the ¼"BSP m & f elbow by ¼ turn. This will allow the pilot or the main gas valve
to be unscrewed from the main gas pipe.
Refitting is a direct reversal of the above.
It is important when refitting gas valves that only a minimum amount of none hardening gas seal is
used on the pipe threads so that excess sealant is not carried into the valve mechanisms.
It is also important that the valves are assembled with the marked gas flow in the correct direction,
and that the "O" ring seals are fitted to the inlet and outlet flanges where appropriate.
See Section 10 for converting between natural gas and L.P.G.
7.6 DualAir® Centrifugal Fan Assembly
The belt drive fan for the DualAir® range is fitted with a purpose made mounting bracket to support
the fan motor and allow for adjusting the tension of the belt drive.