7
Falcon GTE -
Installation & Servicing
GENERAL
3
VENTILATION
Safe, efficient and trouble-free operation of conventionally
flued gas boilers is vitally dependent on the provision of an
adequate supply of fresh air to the room in which the
appliance is installed.
Ventilation by grilles communicating directly with the outside
air is required at both high and low levels. The minimum free
areas of these grilles must be according to the following
scale:
5
FILLING THE SYSTEM
Position ventilation grilles to avoid the risk of accidental
obstruction by blockage or flooding. If further guidance on
ventilation is required then consult BS 6644.
The supply of air by mechanical means to a space housing the
boiler should be by mechanical inlet with natural or mechanical
extraction. Mechanical extract ventilation with natural inlet must
not be used.
Where a mechanical inlet and a mechanical extract system is
applied, the design ventilation flow rates should be as in Table 4
of BS 6644.
Note.
For mechanical ventilation systems an automatic control should
be provided to cause safety shutdown or lockout of the boiler(s)
in the event of failure of air flow in either inlet or extract fans.
IMPORTANT.
The use of an extractor fan in the same room as
the boiler (or in an adjacent communicating room) can, in
certain conditions, adversely affect the safe operation of the
boiler.
Where such a fan is already fitted (or if it is intended to fit an
extractor fan after installation of the appliance) the advice of the
gas supplier should be obtained.
The temperature within a boiler room shall not exceed 25
o
C
within 100 mm of the floor, 32
o
C at mid height and 40
o
C within
100 mm of the ceiling.
Filling shall be performed with a low flow rate from a low point
in the boiler room in order to ensure that all the air in the boiler
is bled from the high point of the system.
Always stop the pump before filling.
IMPORTANT.
Instructions for starting up the boiler for the first
time after the system is fully or partly drained:
If all the air is not bled naturally to an expansion vessel which
opens out onto the air, the system must include manual
bleeder valves, in addition to automatic bleeder valves with the
capability to bleed the system by themselves when it is
operating. The manual bleeder valves are used to bleed all the
high points of the system and to make sure that the filled system
is free of air before the burner is turned on.
General
Recommendations relating to the water system are contained in
BS. 5449 and BS. 6880.
4
BOILER WATER CONNECTIONS
Flow and return connections are positioned at the rear of the
boiler and vary in size depending upon the output model.
Refer to Table 2, page 2 for sizes.
The flow and returns are provided with threaded connections.
A
3
/
4
" drain connection is provided at the rear bottom of the
boiler heat exchanger.
189
188
753
355
205
165
=
=
fal5921
Required area (cm
2
) per kW of total rated input (net)
Boiler room
Enclosure
Low level (inlet)
4
10
High level (outlet)
2
5
Note: Where a boiler installation is to operate in summer
months (e.g. DHW) additional ventilation requirements
are stated, if operating for more than 50% of time (refer
to BS6644).
