Siting The Appliance - Benchmark ZWB 7-29 CC1 Installation And Servicing

Installation
If Thermostatic Radiator Valves are fitted then it is rec-
ommended that the the primary radiator is left open.
Repeated venting probably indicates a leak and this
must be rectified to ensure the proper operation of the
appliance.
No galvanised radiators or pipes must be used.
If any system water treatment is required then
only products suitable for use with Aluminium
shall be used i.e Fernox- Copal or Superconcen-
trate or Sentinal X100, in accordance with the
manufacturers instructions. The use of any other
APPLIANCE
Refer to Fig.1
Appliance
water flow
diagram
WRAS approved
filling loop
Central heating return
Domestic
Central heating flow
hot water
BS stop valve.
Fixed spindle type
Water
main
Fig. 5 Sealed primary water system
Sealed system filling and make up
Heating return
Non return Non return
valve valve
Test cock
Fig. 6
3.4

Siting the appliance

Regulations concerning the Installation Site
B Relevant national regulations must be complied with
section 3.9.1.
B Consult the installation instructions for details of min-
imum clearances required.
Combustion air
In order to prevent corrosion, the combustion air must
not contain any corrosive substances.
Substances classed as corrosion-promoting include
halogenated hydrocarbons which contain chlorine and
fluorine compounds and are contained in some sol-
vents, paints, adhesives, aerosol propellants and
household cleaners, for example.
12
A drain cock should be fitted at
the lowest point of the heating
circuit and the appliance
Hose union
Stop cock
Temporary hose
substances will invalidate the guarantee. The pH
value of the system water must be less than 8 or
the appliance guarantee will be invalidated.
A drain cock to BS2879 must be fitted to the lowest
point of the system.
IMPORTANT: Check that no dirt is left in the
water pipework as this could damage the appli-
ance. Thoroughly flush the heating system and
the mains water supply before fitting the appli-
ance to the wall in accordance with the recom-
mendations of BS7593:1992.
Lockshield
valve
Radiator
valve
6 720 610 576 -09.3O
Auto
Heating return
air vent
Non return
valve
Stop
cock
Fill point
Surface temperature
The max. surface temperature of the casing and the flue
is less than 85 °C.
This means that, no special safety precautions are
required with regard to flammable building materials
and fitted furniture. The specified clearences must be
maintained.
Cupboard/Compartment
The appliance can be installed in a cupboard/compart-
ment need for airing clothes providing that the require-
ments of BS6798 and BS5440:2 are followed. The low
casing losses from the appliance eliminate the need for
ventilation openings in the compartment.
Make up
vessel
1000mm (39 in)
above the highest
point of the system.
6 720 611 137 - 29.1O
6 720 610 599 GB (03.02)