DORCHESTER DR-FC 25, Инструкции по установке, пусконаладке и обслуживанию

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Instruction Manual DR-FC 15
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heater is under water supply pressure, cold water will automatically flow into it.
The valve remains open until the unsafe situation has been averted. A
connecting point for a T&P valve is standard on the water heater. See paragraph
’3.6.3 Hot water side’ .
2.6 Options
The heaters can be supplied with the following additional variations, either
ready fitted or for site fitting:
2.6.1 LPG
The heaters can be supplied adjusted for use on propane or butane, see section
3.12. It is most important that the heater is correctly adjusted for the gas to be
fired.
2.6.2 Unvented Supply
The heaters can be supplied with a purpose designed and sized unvented kit
comprising pressure reducing valve, non-return valve, expansion vessel,
expansion relief valve and pressure/temperature relief valve, to enable the
heater to be coupled directly to the mains water. For details see 2.5.1, 2.5.3 and
3.6.
2.6.3 Top to Bottom Circulation
In order to give enhanced temperature control to aid compliance with the HSE
guidance and the DHss Code of Practice for 'The Control of Legionellae in
Health Care Premises', a pump circulation kit can be supplied comprising 230
volt single phase pump, non-return valve, pipe work and sufficient fittings to
contact between the hot water flow and the bottom connection. For details see
section 3.5 of this manual.