Lochinvar LBF121, Installation, Commissioning & Maintenance Instructions

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9.7 FLUE DISCHARGE
The flue system must ensure safe and efficient operation of the equipment to which it is attached, protect the
combustion process from wind effects and disperse the products of combustion to open external air.
The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion
entering any opening in a building.
For further information on terminal locations, please refer to
Figure 8.1 .
9.8 FLUE HOOD POSITION
On top of each appliance are 4 holes for fixing the flue hood onto the top of the heater, these allow four possible
flue hood positions each at 90° from each other. If an intermediate position is required new holes should be drilled
in the relevant locations.
9.9 FLUE TERMINAL GUARDING
If a horizontal flue terminal is to be fitted less than 2 metres from ground level or in a location where it can be
touched from a window, door or balcony, a terminal guard must be fitted.
The guard should be installed centrally around the terminal ensuring a gap of at least 50mm between the guard
and terminal is maintained.
10.0 AIR SUPPLY
The following information is based on single water heater installations only. If more than one water heater is being
used,
BS5440-2 should be consulted to calculate the necessary requirements.
10.1 COMBUSTION VENTILATION
Ventilation for combustion is not necessary as the combustion air is ducted directly from outside.
10.2 COOLING VENTILATION
When the appliance is installed in a compartment or an enclosure, cooling ventilation should be provided as
follows:
Model
Input
(Gross)
kW
Input
(Net)
kW
Enclosure/Compartment
(Direct to Outside)
Enclosure/Compartment
(To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
LBF81 5.6 5.0 25 25 50 50
LBF121 5.6 5.0 25 25 50 50
LBF151 20.0 18.0 90 90 180 180
LBF171 21.1 19.0 95 95 190 190
LBF221 27.8 25.0 125 125 250 250
LBF301 32.2 29.0 145 145 290 290
LBF401 32.2 29.0 145 145 290 290
TABLE 9.1 COOLING VENTILATION REQUIREMENTS