Installation Details; Water Pressure; Condensate Discharge; Water Treatment - DeDietrich 310 ECO Series Installation And Operating Manual

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.
De Dietrich Gas 310/610 ECO
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