Manual De Dietrich Gas 310 ECO (page 27 of 76) (English)

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De Dietrich Gas 310/610 ECO

7.4 INSTALLATION DETAILS

7.4.1 Water pressure

The boiler is suitable for a maximum working pressure of 100 psi [6.8 bar], the system pressure shall be at least 12

psi [0.8 bar]

7.4.2 Condensate discharge

Discharge the condensate directly into a drain. Only use synthetic material for the connecting pipe-work because

of the acidity of the condensate (pH 2-5) and allow a min. 1.2 inch per 3 ft. [30mm per meter fall], to ensure a good

gravity siphon flow rate. Fill the siphon with clean water before firing the boiler. It is not advisable to discharge into

an outside gutter because of the risk of freezing. Consult local codes.

7.4.3 Water treatment

The system should be filled with mains, cold water (this will usually have a pH of between 7 and 8). Pressurized

installations with a boiler/system content ratio of 1:10 or less should not require water treatment, provided the

following conditions apply:

1. The system is flushed thoroughly to remove all fluxes and debris and filled completely once.

2. Make up water is limited to 5% per annum.

3. The hardness of the water shall conform to the water quality document requirements

All scale deposits will reduce the efficiency of the boiler and should be prevented. However provided the

above is complied with any scale produced will not be too detrimental to the boiler efficiency and will not reduce the

anticipated life expectancy of the boiler.

7.4.4 Safety valve

A safety relief valve NB certified with V or HV symbol as supplied must be installed on the boiler supply piping

without any obstructions. The relief must be not smaller than ¾” and no larger than NPS 4”; the pressure shall not

exceed 10% above the MAWP and must be of an automatic reset type. The valve opening must be routed away so

that no injury to persons or damage to property will result. Consult local codes. When replacing this safety relief

valve, the relief capacity must be > than the minimum relief capacity as listed on the rating plate.

7.4.5 Water Flow & Content Protection:

The boiler if installed above radiation [heating circuits below the boiler] or as required by local codes or authorities

having jurisdiction must install a low water cut-off safety device.

The boiler has been approved and has found to be in compliance to the LWCO protection, provided the factory pre-

set high limit and flow temperatures are not altered and the modulating controls are used and no minimum flow rate

is required as the ‘abc®’ system will monitor these conditions and reduce the boiler output, finally shutting down

until flow conditions improve. As a result, the boiler is virtually unaffected by low water flow. Although boiler flow

and content protection is provided, does not safeguard the entire heating system, additional low water content and

temperature safety controls maybe needed in certain jurisdictions.

7.4.6 Noise production

The average noise level measured at 3 ft. [1m] distance around the boiler is < 60 dBA at full output, avoiding the

need for additional acoustic measures.

7.5 Multiple boiler installation

The Gas 310/610 ECO can be installed individually or in a multiple boiler installation. The narrow width and depth

of the boiler and its ability to be mounted closely together provides a high output within a small floor area.

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De Dietrich Gas 310 ECO Manual

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