Optia HE
-
Installation & Servicing
9
GENERAL
Boiler Size
HE
9
12
15
18
Boiler
kW
9.0
12
15
18
Output Btu/h x 1000
30.7
40.9
50.2
60.4
Water Flow
l/min
11.7
15.6
19.5
23.4
Rate
gal/h
155
206
258
309
Pressure
mbar
54.0
93.5
98.4
142.5
Loss
in wg
21.6
37.4
39.3
57
Table 5 - Water flow rate and pressure loss
TERMINAL
The terminal assembly can be adapted to accommodate various
wall thicknesses. Refer to Frame 10.
AIR SUPPLY
Detailed recommendations for air supply are given in BS.5440:2.
In IE refer to I.S. 813:2002.
The following notes are for general guidance:
1.
It is NOT necessary to have a purpose provided air vent in the
room or internal space in which the boiler is installed.
2.
If the boiler is to be installed in a cupboard or compartment,
permanent air vents are required (for cooling purposes) in
the cupboard/compartment, at both high and low levels. The
air vents must either communicate with room/internal space,
or be direct to outside air. The minimum effective areas of the
permanent air vents, required in the cupboard/compartment,
are specified in Table 4 and are related to maximum rated
heat input.
The boiler is fitted with a special drain plug, which is provided, to
drain the BOILER ONLY, in the event of the system drain plug
being unable to do so. The hydraulic resistance of the boilers, at
MAXIMUM OUTPUT with an 11
O
C (20
O
F) temperature differential,
are shown in Table 5.
Maximum boiler operating temperature should be 82
o
C (180
o
F).
Table 4 - High and low vent areas
Boiler
Air from room/internal
Air direct from
space, cm (in
2
)
outside, cm (in
2
)
HE9
102
(16)
51
(8)
HE12
135
(21)
68
(11)
HE15
170
(26)
83
(13)
HE18
198
(31)
102
(16)
3.
Both air vents MUST communicate with the same room or
internal space or MUST be on the same wall to outside air.
4.
In siting the air vents care must be taken to avoid the freezing
of pipework.Water circulation system.
WATER CIRCULATION SYSTEM
The boiler must NOT be used for direct hot water supply. For the
types of system and correct piping procedure refer to 'Introduction'
and Frame 1.
The central heating system should be in accordance with BS.6798
and, in addition, for Smallbore and Microbore systems, BS. 5449.
The domestic hot water system, if applicable, should be in
accordance with the relevant recommendations of BS. 5546. Copper
tubing to BS. 2871:1 is recommended for water carrying pipework.
The hot water storage cylinder MUST be of the indirect type and
should preferably be manufactured of copper.
Single feed, indirect cylinders are not recommended and MUST
NOT be used on sealed systems.
The appliances are NOT suitable for gravity central heating, nor
are they suitable for the provision of gravity domestic hot water.
The hot water cylinder and ancillary pipework, not forming part of
the useful heating surface, should be lagged to prevent heat loss
and any possible freezing - particularly where pipes run through
roof spaces and ventilated under floor spaces.
Boilers not fitted to a sealed system must be vented.
IMPORTANT
A minimum length of 1m of copper pipe MUST be fitted to both
flow and return connections from the boiler before connection to
any plastic piping.
This applies to ALL types of installation.
Draining taps MUST be located in accessible positions, which
permit the draining of the whole system - including the boiler
and hot water storage vessel. They should be at least
1/2" BSP
nominal size and be in accordance with BS. 2879.
WATER TREATMENT
These boilers incorporate a cast iron heat exchanger and an
aluminium heat exchanger
.
IMPORTANT.
The application of any other treatment to this
product may render the guarantee of
Wolseley UK
INVALID.
Wolseley UK
recommend Water Treatment in accordance with
the
Benchmark
Guidance Notes on Water Treatment in Central
Heating Systems.
Wolseley UK
recommend the use of Fernox, GE Betz Sentinel or
Salamander water treatment products, which must be used on
accordance with the manufacturers instructions.
For further information contact:
Fernox Manufacturing Co. Ltd, Cookson Electronics, Forsyth Road,
Sheerwater, Woking, Surrey. GU21 5RZ. Tel. +44 (0) 1799 521133
or
Sentinel Performance Solutions
The Heath Business & Technical Park, Runcorn, Cheshire
WA7 4QX. Tel: 0800 389 4670. www.sentinel-solutions.net
or
Salamander Engineering Ltd, Unit 24, Reddicap Trading Estate,
Sutton Coldfield, West Midlands B75 7BU. Tel. +44 (0) 121 378 0952
Notes.
1.
It is most important that the correct concentration of the water
treatment products is maintained in accordance with the
manufacturers' instructions.
2.
If the boiler is installed in an existing system any unsuitable
additives MUST be removed by thorough cleansing.
BS7593:1992 details the steps necessary to clean a
domestic heating system.
3.
In hard water areas, treatment to prevent limescale may be
necessary - however the use of artificially softened water is
NOT permitted.
4.
Under no circumstances should the boiler be fired before the
system has been thoroughly flushed.
BOILER CONTROL INTERLOCKS
Wolseley UK
recommend that heating systems utilising full
thermostatic radiator valve control of temperature in individual
rooms should also be fitted with a room thermostat controlling
the temperature in a space served by radiators not fitted with
such a valve as stated in BS. 5449.
Central heating systems controls should be installed to ensure
the boiler is switched off when there is no demand for heating or
hot water.
continued . . . .
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