Supplied By www.heating spares.co Tel. 0161 620 6677
CONTENTS
INTRODUCTION
1
The
Halstead Finest
and
Finest Gold
are fully automatic
wall-mounted, fan-assisted, balanced flue, gas combination appliances
for use with natural gas (G20). The Finest Range of appliances
incorporate a microprocessor based, fully modulating, gas control
system with direct burner ignition.
The
Finest Gold
has a higher domestic hot water heat output and
provides a higher flow rate. The Finest Propane, as its name suggests is
only suitable for use with propane.
The Halstead Finest features an attractive white enamelled casing with
an inset control panel situated behind a drop down door. The flue elbow
and air ducts are also enamelled white to give a clean, attractive
appearance to the installation.
The Finest provides central heating at outputs between 11.0 kW
(37,500Btu/h) and 23.4 kW (80,000Btu/h) with instantaneous domestic
hot water at outputs between 8.8 kW (30,000 Btu/h) and 26.38 kW
(90,000 Btu/h).
The Finest Gold provides similar central heating outputs but has an
enhanced domestic hot water performance, providing between 8.8 kW
(30,000Btu/h) and 30kW (102,360 Btu/h).
Heat output is controlled according to demand (in both domestic hot
water and central heating mode) by the modulating gas control valve.
The appliance always gives priority to domestic hot water supply.
The appliance is supplied with a standard telescopic concentric air and
flue duct system suitable for flue lengths of up to 820mm (32in). The
duct assembly is connected to the boiler via a turret which can exit the
boiler in any horizontal direction. Horizontal extension ducts may be
fitted in accordance with and up to the maximum dimensions stated in
these instructions.
A vertical outlet kit is also available for installations where an outside
wall is not accessible and it is desired to fit the duct ‘through the roof’.
Where an installation demands an extra long or unusual flue system, an
alternative twin duct flue system is available to order. This can only be
used on the
Finest
and
Finest Propane
appliances
Installation using the standard flue kit is described in the main text of
these instructions and supplementary instructions at the rear of this
booklet describe installations involving the vertical outlet kit and the twin
duct kit.
NO OTHER FLUE KITS OR EXTENSIONS MAY BE USED
WITH THIS APPLIANCE.
The appliance can be installed from inside the room without access to
the external wall providing that a wall liner is fitted and that the wall
thickness is less than 0.5m (19in).The wall liner is available as an
optional extra. See section 4 for further details. (Note: If the vertical
outlet kit is to be used, access to the roof is necessary).
The multifunctional boiler chassis (incorporating the expansion vessel
and service connections) may be fitted and pre-filled prior to the boiler
body being installed.
The multifunctional boiler chassis allows sufficient space within it, at
each side of the expansion vessel, to allow any or all of the water or gas
pipes to pass vertically up and out of the top.
The appliance is designed for use with sealed primary water systems and
incorporates a circulation pump, diverter valve assembly, pressure
gauge, flow switch, safety valve and CH expansion vessel. A separate
DHW expansion vessel is not required. Isolation valves are fitted to the
service connections, and an automatic heating bypass is fitted to
maintain an adequate flow rate through the boiler.
If thermostatic radiator valves are installed we recommend that one
radiator is fitted with lockshield valves (normally in the bathroom).
Internal frost protection and an electro-mechanical time clock (with
override switch) are fitted as standard equipment, and the boiler may be
used with any certified mains voltage room thermostat.
An electronic time clock or ON/OFF switch are available as an optional extras.
NOTE:
British Standard BS7593: 1992 stresses the importance of cleansing and flushing
of the system to ensure it continues to run efficiently with the minimum of maintenance
necessary, Halstead Boilers fully support this professional approach and recommend that
the system is cleansed with an effective chemical cleanser and protected long term with a
suitable inhibitor, Such products are available from Fernox.
Gas Consumer Council
The Gas Consumer Council (GCC) is an independent organisation
which protects the interest of gas users. If you need advice, you will find
the telephone number in your local directory under ‘Gas’.
1
GENERAL DESCRIPTION
2
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . .1
2.1
Gas Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.2
Performance data . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.3
Minimum clearances . . . . . . . . . . . . . . . . . . . . . . . .1
2.4
General specifications . . . . . . . . . . . . . . . . . . . . . . .1
2.5
Overall appliance dimensions . . . . . . . . . . . . . . . . . .1
2.6
Concentric air/flue duct specifications . . . . . . . . . . . .3
2.7
Optional twin pipe air/flue duct specifications . . . . . . .6
2.8
Exploded diagram . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.9
Hydraulic circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3
INSTALLATION REQUIREMENTS . . . . . . . . . . . . .9
3.1
Statutory requirements . . . . . . . . . . . . . . . . . . . . . . . .9
3.2
Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.3
Flue terminal position . . . . . . . . . . . . . . . . . . . . . . . .9
3.4
Ventilation requirements . . . . . . . . . . . . . . . . . . . . . .10
3.5
Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.6
Central heating system . . . . . . . . . . . . . . . . . . . . . .10
3.7
Domestic hot water systems . . . . . . . . . . . . . . . . . . .11
3.8
Electricity supply . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.9
External controls . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.0
INSTALLING THE APPLIANCE . . . . . . . . . . . . . .13
4.1
Unpacking the appliance . . . . . . . . . . . . . . . . . . . . .13
4.2
Installing the multifunctional boiler chassis . . . . . . . . .13
4.3
Service connections . . . . . . . . . . . . . . . . . . . . . . . . .14
4.4
Fitting the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.5
Gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.6
Pressure relief valve connection . . . . . . . . . . . . . . . .14
4.7
Air/flue duct installation . . . . . . . . . . . . . . . . . . . . . .15
4.8
Wiring instructions . . . . . . . . . . . . . . . . . . . . . . . . . .18
5
COMMISSIONING AND TESTING . . . . . . . . . . .19
5.1
Filling the water system . . . . . . . . . . . . . . . . . . . . . .19
5.2
Commissioning the central heating circuit . . . . . . . . .20
5.3
Commissioning the appliance . . . . . . . . . . . . . . . . .20
5.4
DHW flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.5
Final checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.6
Ignition lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.7
Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . .21
5.8
Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.9
Other features . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.10
User’s instructions . . . . . . . . . . . . . . . . . . . . . . . . . .21
6
ROUTINE SERVICING INSTRUCTIONS . . . . . . . .22
7
INTERNAL WIRING DIAGRAMS . . . . . . . . . . . . .24
7.1
Functional flow diagram . . . . . . . . . . . . . . . . . . . . .24
7.2
Illustrated wiring diagram . . . . . . . . . . . . . . . . . . . .25
8
FAULT FINDING . . . . . . . . . . . . . . . . . . . . . . . .26
8.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.2
Diagnostic indicator LED’s . . . . . . . . . . . . . . . . . . . .26
8.3
Start/power up faults . . . . . . . . . . . . . . . . . . . . . . . .26
8.4
Ignition faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.5
DHW fault finding . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.6
Central heating fault finding . . . . . . . . . . . . . . . . . . .26
9
REPLACEMENT OF PARTS . . . . . . . . . . . . . . . . .28
9.1
Heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . .28
9.2
Combustion chamber insulation . . . . . . . . . . . . . . . .28
9.3
Fan assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
9.4
Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
9.5
Ignition and detection electrodes . . . . . . . . . . . . . . . .28
9.6
Multifunctional gas control . . . . . . . . . . . . . . . . . . . .29
9.7
Air Pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . .29
9.8
Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . .29
9.9
PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
9.10
CH/DHW Microswitches . . . . . . . . . . . . . . . . . . . . . .29
9.11
Thermistors D.H.W. or Heating . . . . . . . . . . . . . . . .30
9.12
Water flow/regulator . . . . . . . . . . . . . . . . . . . . . . . .30
9.13
DHW heat exchanger . . . . . . . . . . . . . . . . . . . . . . .30
9.14
DHW flow switch body . . . . . . . . . . . . . . . . . . . . . . .30
9.15
Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
9.16
Pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . .31
9.17
Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
9.18
Auto air vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
9.19
CH expansion vessel . . . . . . . . . . . . . . . . . . . . . . . .31
9.20
Optional time clock. . . . . . . . . . . . . . . . . . . . . . . . .31
10
SHORTS PARTS LIST . . . . . . . . . . . . . . . . . . . . .31
11
Supplementary instructions for flue systems
with a vertical outlet. . . . . . . . . . . . . . . . . . . . . . . . .32
SE-DUCT Applications . . . . . . . . . . . . . . . . . . . . . . .32
12
Supplementary instructions for flue systems
incorporating an additional 90° elbow. . . . . . . . . . . .33
13
Supplementary instructions for twin pipe flue systems 33
