page no. 23 of 68
CPx Range Users, Installation & Servicing Instructions Doc Ref M201 issue 2.9 Nov 2018.
Before installation, check that the local distribution
conditions, fuel specification, and adjustment of the
appliance (see data plate) are compatible.
IMPORTANT:
Copper Sulphide / ‘Black Dust’
In some areas of the UK, particularly
Northern Ireland, problems have been
experienced with copper sulphide (more commonly
referred to as ‘Black Dust’) forming on the inner
surfaces of copper gas supply pipework. This dust can
enter the gas stream and may lead to blockages of
valves, filters and injectors.
If this heater is being installed in an area where ‘Black
Dust’ is known to be a problem, and copper gas supply
pipework is used, it is recommended that a filter
having a stainless steel 50 micron mesh and suitable
for Natural Gas is fitted at the inlet to the appliance
immediately downstream of the main appliance
isolation valve. The end user should be advised that the
filter will require periodic cleaning or replacement at
least once per year,during the annual service, or more
often if the problem is severe.
The location chosen for the air heater must permit:
- the provision of a satisfactory flue system and an
adequate air supply.
- adequate space for servicing and air circulation around
the air heater.
The heater(s) must not be installed in conditions for which
it is not specifically designed e.g. where the atmosphere
is corrosive or salty, and they are not suitable for outdoor
use unless the CPx/EA style is specified. CPx/EA heaters
must be installed on a plinth such that there is a minimum
distance of 0.5m between ground level and the lowest
point of any air inlet grilles.
Where the location of the air heater is such that it might
suffer external mechanical damage e.g. from overhead
cranes, fork lift trucks, it must be suitably protected.
CPx heaters are for normal operation within an ambient
temperature range of -10 to 25°C.
The air heater must be installed in accordance with
the rules in force and the relevant requirements of any
fire regulations or insurance company's requirements
appertaining to the area in which the heater is located,
particularly where special risks are involved such as
areas where petrol vehicles are housed, where cellulose
spraying is carried out, in wood working departments etc.
IMPORTANT:
Heaters shall not be installed in:-
a) Those parts of spaces within buildings
that have been classified as hazardous areas
as defined in BS EN 60079-14.
b) Where there is a foreseeable risk of flammable
particles or gases or corrosion inducing gases or vapours
being drawn into either the heated air stream or the
air for combustion. In such cases installation may only
proceed if both air sources are from an uncontaminated
source, preferably from outside the building. It may
also be necessary to purge the air heater before the
burner is allowed to fire. In certain situations where only
airborne particles are present it may suffice to fit filters
on the main air inlet duct of the heater. Advice in these
instances must be obtained from Powrmatic Ltd.
c) In areas subjected to significant negative pressures
due to extract systems
.
The heater should be correctly sized for the area that it is
heating. Full calculations need to be preformed to ensure
the correct KW output heater is fitted (CIBSE elemental
methodology can be used, or the Powrmatic Technical
Department can provide guidelines).
Wiring external to the air heater must be installed in
accordance with the I.E.E. Regulations for Electrical
Installations and any local regulations which apply.
All heaters are supplied by either 230V - 1ph, 50Hz or
415V - 3ph, 50Hz (see technical data or data plate on
heater for exact). The method of connection to the main
electricity supply must:-
- facilitate the complete electrical isolation of the unit(s)
- be in a readily accessible position adjacent to the unit(s)
- serve only the unit(s)
- have a contact separation of at least 3mm in all poles.
See the accompanying wiring diagram for the heater
electrical connections.
Only flue systems supplied through Powrmatic Ltd may
be used with CPx units. Several configurations of flue and
combustion air ducts are available.
The flue must terminate in a freely exposed position and
be sited to prevent the products of combustion entering
any opening in a building in such concentration as to be
prejudicial to health or a nuisance.
