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NVS Range Users, Installation & Servicing Instructions Doc Ref M102 issue 2.4 May 2018.
E) Maintenance
To maintain efficient, reliable and safe operation of the
heater it must serviced by a qualified person at least
annually and preferably at the end of the heating season.
F) IMPORTANT
Free access must be maintained to and around the heater
for servicing purposes and the air supply to the heater
must not be restricted in any way. Combustible materials
must not be stored adjacent to the heater.
If at any time a gas leak is suspected, turn OFF the gas
supply at the meter and contact the local gas undertaking
immediately.
All Powrmatic heaters use gas and electricity to power
them, they may also contain moving parts such as pulleys
and belts. It would be hazardous to tamper with or attempt
to service unless you are a competent person in the field of
Gas and Electrical work.
If you have any safety questions reference the servicing
and installation of any of our heaters please do not hesitate
to contact our head office for expert advice. Your safety is
paramount to us.
Gas Safety (Installation & Use) (Amendment)
Regulations
It is law that all gas appliances are
installed, adjusted and, if necessary,
converted by qualified persons* in
accordance with the current issue of the
above regulations. Failure to install appliances
correctly can lead to prosecution. It is in your own
interests and that of safety to ensure that the law is
complied with.
* An approved class of person listed on the gas safe
register.
The NVS range are highly efficient, fully condensing, gas
fired, fanned circulation air heaters that cover heat outputs
of 30kW to 140kW, have a closed combustion circuit and
are supplied complete with a flue system. They are certified
for use on Natural Gas, Group H - G20, and Propane - G31
only. Appliance Categories are Cat II2H3P (GB, IE).
The heaters are designed to be suspended from suitable
roof points or alternatively to be mounted on purpose
designed brackets and are intended primarily for heating
commercial or industrial premises. All variants are for
internal use only.
NVS heaters feature a closed combustion circuit and have
an internal exhaust fan, mounted downstream of the
heat exchanger, to evacuate the products of combustion
and draw in air for combustion. The air heater must be
connected to a flue system that is approved by Powrmatic
Ltd.
They may be used where the atmosphere inside the
premises could be contaminated e.g. Dust, oil mist etc. but
the heaters are not airtight and therefore may not be used
in areas classified as hazardous as defined in BS 5345: Part 2
or areas subjected to significant negative pressures due to
extract systems.
NVS/F heaters have an axial fan assembly fitted at the rear
to circulate the air being heated through the formed tube
heat exchanger. NVS/C units are supplied with a centrifugal
fan and NVS/D units for use with ducted systems where the
air moving fan is by others or a centrifugal fan section is
used adjacent to or remote from the heater. NVS/DH units
are for use in air handling units. NVS units are not suitable
for siting externally.
Heaters are fitted as standard with inshot burners, a fully
automatic control for ignition, flame sensing, gas supply
control and safety functions, an internal exhaust fan, main
air fan (/F and /C models), and fan/limit thermostat.
Options include High/Low or Modulating burner controls,
inlet duct connection, outlet duct connection, 30°, 45°
head, 90° outlet bend, vertical/horizontal outlet louvre
assembly and a full range of modular duct components.
IMPORTANT
Service and Maintenance Engineers shall
ensure that replacement items are fitted,
adjusted and set in accordance with the
data and detail set out in these instructions. If in doubt
consult Powrmatic Technical Department.
Gas Safety (Installation & Use) Regulations 1998
It is law that all gas appliances are
installed, adjusted and, if necessary,
converted by qualified persons* in
accordance with the current issue of the
above regulations. Failure to install appliances
correctly can lead to prosecution. It is in your own
interests and that of safety to ensure that the law is
complied with.
* An approved class of person listed on the gas safe
register.
1.1 Introduction
