12
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
Water supply quality may adversely affect the efficiency and performance of water heaters and hot water systems.
The situation can intensify where higher temperatures or demands exist.
Water hardness should not exceed 205ppm CaCO3 and TDS (Total Dissolved Solids) of untreated water should not
exceed 350ppm. If these values are exceeded, contact Lochinvar Limited for further guidance.
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 water
heater 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
combustible material in the vicinity of the equipment and its flue to exceed 65°C. If such a situation is unavoidable,
appropriate insulation should be provided.
Locate the equipment so that if the appliance or any connecting pipework should leak, water damage will not occur.
When such locations cannot be avoided it is recommended that a suitable drain pan be installed under the
equipment. The pan should be adequately drained but must not restrict the combustion or ventilation airflow.
