Ventilation - IDEAL Viceroy GT 8 Installation And Servicing

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:
Required area (cm 2 ) per kW of total rated input (net)
Low level (inlet)
High level (outlet)
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).
4 BOILER WATER CONNECTIONS
Flow and return connections are positioned at the rear of
the boiler.
The flow and returns are provided with stub pipes sized as
in Table 2.
A 2" drain connection is provided at the bottom of the boiler
rear section.
A 2 1 / " connection is provided for sludge removal at the
2
bottom of the boiler front section.
DE-SLUDGE CONNECTION
1
2 " tapped sludge
/
2
removal hole
8
GENERAL
Boiler room Enclosure
4 10
2 5
500
183
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 25ºC
within 100 mm of the floor, 32ºC at mid height and 40ºC within
100 mm of the ceiling.
2" tapped drain
connection
∅ B return connection
Boiler GT 8 to GT 10
∅ B
3"
D mm 235
E mm 1427
D
∅ B flow connection
1149
E
183
140
GT 11 to GT 14
4"
254
1447
Viceroy GT -
Installation & Servicing