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Table 3
AVAILABLE PUMP HEADS
HEATING OUTPUT
HEAD
kW
Btu/h
m
1ft)
8.8
130,000)
5.1
116.61
11
137,500)
4.7
115.5)
13
144,3501
4.3
114.11
1 5
151,2001
3.8
112.6)
17
158,000)
3.3
110.91
19
164,800)
2.2
17.21
22.9
178,000)
1.7
15.51
1 .
GENERAL INFORMATION
1.
HIGHFLOW 3.5 OF INCORPORATES
(a)
An open flued low thermal capacity boiler having a
maximum heat output of 22.9 kW (78,000 Btu/h).
(b) A heatbank having a nominal capacity of 45 litres ( 10
gallons) of circulating primary hot water positioned at the
side of the appliance. A copper finned water to water heat-
exchanger is fitted into the heat bank. Secondary mains
supply domestic hot water passes through the heat
exchanger.
(c) A diverter valve to direct the boiler output either to
domestic hot water or central heating as required.
{d) An integral circulating pump.
(e)
Multifunctional gas valve and electrical control system
to individually control the domestic hot water and central
heating.
(f)
Boiler and hot water temperature control thermostats
providing control for central heating and domestic hot
water.
(g) A User's Operating Switch for selection of water only or
heating and water. A programmer kit is available as an
optional extra.
(h) An electronic pump delay control board which enables the
pump to run on for a period of about 5 minutes after each
operating cycle.
(i)
An expansion vessel, pressure gauge, pressure release
valve and auto air vent to enable the appliance to be
connected to a sealed water system.
2.
INSTALLATION WARNING:
GREAT CARE MUST BE TAKEN TO ENSURE THAT NO
FOREIGN MATTER IS LEFT IN THE WATER SYSTEM.
THIS COULD CAUSE DAMAGE TO THE APPLIANCE.
3.
NATURAL GAS SUPPLY
The boiler requires 2.8m
3
/h (98.5 ft
3
/h) of gas. Meter
and supply pipes must be capable of delivering this
quantity of gas in addition to the demand from any other
appliances in the house. The meter outlet governor must
ensure a nominal pressure of 20m bar (8 in. wg.) at the
appliance. The complete installation, including the meter,
should be inspected and tested for soundness and purged
in accordance with the recommendations of BS 6891.
4.
ELECTRICAL SUPPLY
Mains supply 240 V,
50 Hz, 135 watts.
5.
OPEN VENTED SYSTEM
The appliance is supplied ready for connection to a sealed
water system. A conventional open vented system can
be used by carefully removing the automatic safety valve
and sealing its connection. See Section 10. Care should
be taken not to distort the pipe.
6.
CONTROLS
All controls included with the appliance are specified in
the 'Short List of Parts' included in this leaflet. There is
3
MINIMUM FLOW RATE
TEMPERATURE RISE
1/m.
lgal/m.)
11.5
12.51
14.5
13.2)
17.0
13 8)
11 °C (20°F) between
heating flow and return.
19.5
14.31
22.5
14.9)
24.8
15.41
30.0
16.61
provision for a room thermostat and frost thermostat to
be fitted to the appliance. See Section 11.
Thermostatic radiator valves can be used in the system;
however, a suitable by-pass is recommended with this
type of control.
7.
DRAINAGE
A drain cock is fitted at the base of the heat bank to drain
water from the appliance.
B.
PACKAGING
The appliance is despatched in one package.
2.
SITING THE APPLIANCE
(Refer also to sections
5, 6
and
7).
1.
The appliance is floor standing and the floor must be firm
and revel.
2.
The following clearances must be left to allow for
servicing and ventilation:
(a)
(b)
(c)
(d)
Above the appliance:
In front of the appliance:
Left-hand side:
(Viewed from front)
Right-hand side:
(Viewed from front)
Servicing 450 mm (18 in.)
Ventilation 5 mm (0.2 in.)
Servicing 600 mm (24 in.)
Ventilation 150 mm (6 in.)
SeJVicing 5 mm (0.2 in.)
Ventilation 5 mm (0.2 in.)
SeiVicing 70 mm (2.8 in.)
Ventilation 70 mm (2.8 in.)
If a standard work surface is
fitted then the gap should
be 100 mm (4 in.)
NOTE: Care must be taken to ensure adequate space is
available at either side for installing the boiler. See Section 8
Installation.
NOTE: If the appliance is to befitted in a timberlramed building
is should be fitted in accordance with the British Gas
publication "Guide for Gas--Installation in Timber Framed
Housing" Ref DM2. If in doubt advice must be sought from
the local Gas Region of British Gas.
3.
REMOVAL OF CABINET
See Fig. 2.
NOTE: It is necessary to remove the cabinet top panel, front
panel, left and right hand side panels and lower grille to aid
installation.
(a)
Remove the cabinet top panel by snatching squarely
upwards to release the clips.
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