Worcester 350 Combi User Manual

TABLE 6
NOMINAL RATE OF DISCHARGE OF DOMESTIC HOT WATER
litre s/ mi nut e
13 12
11
10
gallo ns/ minute 2.86 2.75 2.42 2. 20
Nominal te m pe rature
38 .5 41.5 45.5 50 .0
ri se oc
T ab le 6 is given as a guide and assumes a Water to Water heat
exch an ger efficiency of 1 00 % and a constan t heat ou t put of
35.2kW (120,0 00 Btu/ h) . The control sensors wi ll ensure tha t the
h eat ou tp ut fro m the boiler w ill reduce as necessary to maintain
the
te mp erature rise and prevent overheating.
4. Siting the Appliance
4.1 The appliance may be installed in any room although par ·
ticular attention is drawn to the requirements of the current
I.E.E. Wiring Regulations and, in Scotland, the electrical provi -
sions of the Building Regulations applicable in Scotland, with
respect
to the installation of applianc es in rooms containing
baths
or showers.
Where a room sealed appliance is
in stalled in a room contain-
ing a bath or shower, any electrical switch or appliance control
us i ng mai ns electricity must not be able to be touched by a
person using the bath
or shower.
4.2 The appliance is not suit ab le fo r external insta ll ation.
4.3 The a pp liance do es not require any special wa ll protection.
The
wa ll must be capable of supporting th e weight of the appli-
ance. See Table. 4.
If the appliance is to be fitted in a timber framed building, refer to
the British G
as publication "Guide for Gas Insta ll ations in Timber
Framed
Housing ".
4 .4 The followi ng clearances must be available for installation and
for servic
in g. See Fig. 2.
In sta llatio n Se rv icing
Above the flue be nd 35mm
35mm
In front 600mm 600mm
Below 200mm 2 00mm
Right and left hand side 25 mm 5mm *
*
If a side fl ue connection is m ade then 25 mm mu st be left at th at
side for possible service access.
5
TABLE 7
TOTAL LENGTH OF
GAS SUPPLY PIPE (metres)
Pipe
I I
Diameter
3 6 9
(mm)
Gas Discharge Rate (m
3
/ h)
8.7
I
5.8
I
4.6
22
18.0
I
12.0
I
9.4 28
Each fi tting used in the gas line from t he me ter is equivalent to a
specif ic length of straigh t p ipe which must be added to the
stra ig ht pipe length to give th e total length.
i.e. Elbow= 0.5 metres, Tee= 0.5 me tres, 90 ° Bend= 0.3 metres.
4.5 T he appliance can be installed in a cupboard to be used for
airing clothes provid ed that the requireme nts of BS 67 98 and
BS 5440 :2 are stri ct ly follo wed.
It is
essent ial that an airing space is separated from the boiler
space by a perforated non-combustible
part ition. Expanded me ta l
or r
igi d wire mesh are acceptable provided that the ma jor dimen-
sion is less than 13 mm . See BS 6798 : 198 7.
The requirements regarding
the servicing space mu st be followed
when
the appliance is in a comp artment used for airing cl othes.
No combustible surface m us t be within 7 5 mm of the casing.
We rec
ommend that the distance between the inner face of a cup-
board do or and th e cabinet front should not be Jess than 75 mm .
If a cupboard is to be bu ilt around the appliance after installation
then the requirem ents specified in BS 6 798: 1987 and BS 5440 :2
mu st be strictly fo ll owed.
4.6 The position of the pipes are shown in Fig . 3 so that the piping
of
the system can take place before the fitting of the appliance.
4. 7 Always consider the po ss ible need to separate th e pi pes fr om
the appliance after installation.

Worcester 350 Combi Specifications

General

Brand	Worcester
Model	350 Combi
Category	Boiler
Language	English