Siting The Appliance; Air Supply; System Considerations; Flue Terminal Position - Worcester HEATSLAVE 9.24 RSF Installation And Maintenance Instructions Manual

4. SITING THE APPLIANCE
The appliance may be installed
in
any room although pctrticular
attention i s drawn to the requirement s of the I.E.E. Wiring
Regulations and, in Scot land, the electrical provisions of the
Building Regulations applicable in Scotland .
With respect to the installation of the appliance in
a room
containing
a bath
or shower. Where
a
room sealed appliance
is installed in a
room containing
a
bath or shower, any
electrical
switch or appliance c ontrol utilising mains electricity should
be so situated that it cannot
be
touched by a person using t he
bath or shower.
!R6fer also to sections 2, 3, 6 , 7 and S.l
1. The appliance is w all mounted, no special wall protection
is reQuired. If the building is of a t imber f rame construction
11-\e guide Hnes and recommendatiof)S laid down by the
Brrtish Gas Corporat ion should be followed when mak!ng
the balanced f lue apert ure.
2 . The w all to w hich the applianc e is t o be fixed must be
capable
of
supporting its we igh1 (referto Technic~ l Dat a
Section 2). The wall mount ing plate together w ith tl'le
fixing temp! ate, Fig . 4 should be used to enable the fixing
sc rews and bal anced f lue cu t ou t pos it ion to be
determined.
3.
T he follo wing clea r ances must be left to allow for
inst allation and servicir.g: ·
Installation
Above
ln front
Below
Side
150 mm 16 in.)
6DOmm (:24 in.)
450 mm ( 18 in. )
See not e below .
Care must be g iven t o ensure adequate space is available
either side for mount ing the appliance. this is left to t he
discretion of the installer.
NOTE: On side flue applications a side clearance of 75 mm
(3 in .} is requi red to faciht ate makin g good internal waH
face when left or right hand ilue outlet is selected.
Servicing and Operation
Above 50 mm {2 in.)
In front 600 mm (24 in.)
Below 280mm
(1
1 in_ )
Right and Left Side 20 mm (0 _ 7 in.)
5. SYSTEM CONSIDERATIONS
1. It is most important t hat t he flow rate shown in Table 4
corresponding to t he heating output that has been selected
is achieved and a suitable by·pass must be included as
described in Section
9 .
2 . For circuit design purposes t he pressure drop across t he
appl iance should be obtained ft om Table 4 using the
pressure drop cortespondingtotheheatiflg ovtput chosen .
t here is no need to take into account the higher boiler output
used for domest ic hot water.
3 . When a demand is made for central heat ing the boiler
output is modulated automat ically f rom 8.8 kW to
19
k W
(30- 6 4.800Btu/h) in order to give predominantly st able
room temperatu res .
4 _ When a demand is made for domest ic hotwater theboiler
outpu t is modulated automat icall v hom 8 . 8 to 24 .0 kW
130-82,000 Btu/hi in order to give predominantly stable
hot water temperatures .
5 . The unit heats the domestic hot watet instantaneously and
for the time that domest ic hot water is being drawn off the
central heating syst em is temporarily interrupted. When
hot water only is selected the
ur~ it
will be complete ly cold
and a few second s w ill elapse while the heat exchangers
pre-heat before hot water is obtained .
6 . The appliance includes a circulating pump and no ot her is
required
7. Where room and frost thermostats are to
be
used t hey must
be suit able ior mains application.
s
6. AIR SUPPLY
1 . The room in which the appliance is :nstalled does not
require a purpose air vent-
2 . lfthc appliance is inst alled in a cupboard or compattment.
per manent air vents are required in the cu pboar d or
compartment, one at high level. and o ne at low level,
eitherdir4;!ct to outside air or to a room . Both high and low
level air vents must comm unicate w ith the same room or
must both be on the same walttooutside air. The minimum
effective areas required are given !n Tabl e 5.
Table 5
Position
of
A ir from Ai1 direct
I
Air Vents
room from outside
I
High Levei
2 76cm }
138cm
2
I
{42 in
2 )
(2 1 in
2
l
j
I
Low Lev el 276cm
2
138
cm
2
(42 in
2 )
'
i2 1 in
2
\
7. FLUE TERMINAL POSITION
IMPORTANT
1. Flue length . See note in Section 2-Technical Dat a
regarding standard fl ue assembly and extension flue .
2. The flue must be
i nstalle~
in ac cordance wit t! t h e
recommendations o f
B.S. 5440:
Part 1.
M inimum siting dimensions for positioning the balanced flue
t ermjnal:
TERMINAL POSITION {See Fig. 3) MIN. DISTANCE
A - Directly below an open able window
or other opening e.g. air brick 300mm !12in.)
I
l
B -Below gutters, soil pipes or drain pipes 75mm
(3in.)l
C - Below eaves 200mm (Sin.)
D- Below balconies ot car port roof 200mm (8il"'.)
£ - From vertical dra1 n pipes and soil pipes 75mm
(3in.)
F -From internal or external comers 300mm
(12in.l
G-Above ground, roof or balcony level 300mm
!1 2in.!
H- From a surfocc facing a terminal 600mm (24in .t
I -- From a terminal facing a terminal 1200mm 147in.)
J - From an opening in a car port {e.g. door,
win dow~ into dwelling l 200mm {47in. )
K -
Vertically from a terminat on t he sam&
wall
1500mm t59in. l
L - Horizont311y from a 1ermina' on the
same wall 300mm
(12in_)
GENERAL NOTES
1 . Theterm inal must be positioned such that the combustion
products c an d!~perse freely at a l~ t imes.
2. In certain w eather conditions a terminal may steam and
posit ions w here th is could ca:;se a nuisance should be
avoided.
3 . H the term ina I dischar ges into a p ethway or passageway
check that com bustion product s will not cause a nuisance
and that t he terminal will not obstruct the passageway.
4 . If t he t erm inal is f itt ed w ithin 850 mm of a plast ic gutter
or within 450 mm of pain ted caves , an aluminium shield
of at least 750mmlong should be fitted to the underside
of t he gutter or painted svrf ace. m imensions
a
and
c
in
the d iagram.)
5 . if a term in al i s f itt ed less th an 2 metres above a balcony,
above ground or above a flat roof to
wh~ch
people have
access then a suitable terminal guard should be provided.
A terminal protective g uard is available from:
Tower Flue Components Limited,
Vale
Rise,
Tonbridge, TN9 1TB. Reference: GC 393 553- K2