12
IGE/UP/10:
Installation of flued gas appliances in industrial and commercial premises
Edition 3
Gas Safety (Installation and Use) Regulations 1998 (England, Scotland & Wales)
CIBSE: Guide parts A, B and C
H.S.E. guidance
Automatically controlled steam and hot water boilers
note PM5:
Third edition of the 1956 Clean Air Act Memorandum on Chimney Heights
Manufacturer's notes must not be taken in any way as overriding statutory obligations.
5.0
WATER QUALITY
The Lochinvar EcoKnight™ contains a stainless steel heat exchanger; therefore care must be exercised to ensure
that the system water and any water treatment are compatible. Whenever a new boiler is connected to an existing
system, the pipework must be thoroughly cleaned and flushed to remove debris, rust particles, carbonate deposits
and any existing water treatment that might be incompatible with the heat exchanger. New systems must also be
thoroughly flushed to remove debris and flux deposits.
Whilst chemical inhibitors remove oxygen from the water, due to uncertainty in dosing levels, there is the possibility
that the inhibitor will eventually be diluted to the point where it is no longer effective. To ensure there is effective air
separation and removal, an air separator should be fitted to the hottest part of the system, in accordance with the item
manufacturer’s instructions. In addition to this a means of dirt removal (e.g. dirt separator or strainer) should be fitted
to the boiler return pipework to prevent the accumulation of debris within the heat exchanger coils.
An air separator is available from Lochinvar Limited as an ancillary option.
The use of chemical inhibitors alone will not satisfy the terms of the heat exchanger warranty.
6.0
LOCATION
6.1
PLANT ROOM REQUIREMENTS
The Lochinvar EcoKnight™ may only be installed in a room that complies with the appropriate ventilation
requirements.
The Lochinvar EcoKnight™ can be used as a type C
13
, C
33
, C
43
or C
53
appliance. Due to its room sealed design,
ventilation allowances for combustion air are not necessary, provided the minimum clearances and service
clearances as detailed in
Figure 3.2
are observed. If the appliance is to be installed in a compartment or a hot
environment, the minimum clearances detailed in
Figure 3.1
should be observed. In addition to this, ventilation for
cooling purposes must be fitted. For further guidance, please refer to
Section 9:
AIR SUPPLY
or to
BS5440-2
or
BS6644
as appropriate.
The Lochinvar EcoKnight™ can also be used as a type B
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appliance. If such a configuration is to be used, then
appropriate ventilation for cooling and combustion must be provided. For further details, please refer to
Section 9:
AIR SUPPLY
or to
BS5440-2
or
BS6644
as appropriate.
6.2
GENERAL REQUIREMENTS
Corrosion of the heat exchanger coils and flue system may occur if air for combustion contains certain chemical
vapours. Such corrosion may result in poor combustion and create a risk of asphyxiation. Aerosol propellants,
cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium
chloride, waxes and process chemicals are corrosive. Products of this sort should not be stored near the boiler or
outside by the air intake (if applicable). The fitting of this equipment in a situation where aerosols or other chemicals
may be entrained into the combustion air will invalidate the warranty.
The equipment must be installed on a level surface that is capable of adequately supporting its weight (when filled
with water) and any ancillary equipment. The operation of the equipment must not cause the temperature of any
