Lochinvar HERALD HCB116CE, Installation Manual

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12.0 AIR SUPPLY
The following information is based on single boiler installations only. If more than one boiler is being used, BS5440-2
or BS6644 (as appropriate) should be consulted to calculate the necessary requirements.
12.1 COMBUSTION VENTILATION
When used as a Type C (room sealed) appliance, provided sufficient clearance is provided, ventilation for combustion
is not necessary as the combustion air is ducted directly from outside.
When used as a Type B (open flue) appliance, the combustion air requirements are as follows:
Model
Gross
Input
(kW)
Net
Input
(kW)
Ventilation
(Room)
(cm
2
)
Compartment Compartment
(Direct to Outside) (To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
HCB46CE 43.9 39.6 165 200 400 400 800
HCB61CE 58.6 52.8 230 265 530 530 1060
12.1.1 COMBUSTION VENTILATION REQUIREMENTS HCB46CE – HCB61CE
Model
Input
(Gross)
kW
Input
(Net)
kW
Plant Room Enclosure
Low
Summer Use
Medium
Summer Use
High
Summer Use
Low
Summer Use
Medium
Summer Use
High
Summer Use
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
HCB86CE 83.5 75.3 152 304 228 380 304 456 380 760 456 836 532 912
12.1.2 COMBUSTION VENTILATION REQUIREMENTS HCB86CE
12.2 COOLING VENTILATION
When used as a type C (room sealed) appliance, installed in a compartment or an enclosure, cooling ventilation should
be provided as follows:
Model
Input
(Gross)
kW
Input
(Net)
kW
Enclosure/Compartment Enclosure/Compartment
Boiler Room
(Direct to Outside) (To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
HCB46CE 43.9 39.6 200 200 400 400 N/A N/A
HCB61CE 58.6 52.8 265 265 530 530 N/A N/A
HCB86CE 83.5 75.3 380 380 760 760 152 152
12.2.1 COOLING VENTILATION REQUIREMENTS
When used as a type B (open flue) appliance, provision for cooling ventilation is included in the combustion ventilation
allowance.