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1. Introduction
The Parmet Range of Gas Fired Warm Air
Heaters covers applications with outputs
from 300,000 to 800,000 Btu/h.
The standard unit is the free-standing unit
incorporating swivel type distribution heads.
These units are available with inlet and
outlets spigots suitable for connection to
ductwork.
2.Location
The installation of a warm air heating system
must conform with any fire regulations or
insurance requirements especially where
special risks are involved i.e. where there is
paint spraying, etc. Attention must be paid
where polyurethane based products are
used in the premises as these can cause
corrosion to the heat exchanger.
Installation of free blowing
PARMET air heaters:-
Position the air heater taking into regard the
position of the exhaust flue and avoid the
heater being obstructed by pillars or
shelving which could prevent the warm air
from circulating.
When more than one air heater is installed
in the same room it is good practice to
distribute the air in opposing directions.
If air is to be ducted from the appliance all
ducting should be made from non-
combustible material.
Where interjoist spaces are used as duct
routes they should be suitably insulated to
prevent excessive heat transfering to the
woodwork. A full unobstructed return air
path should be provided to enable the air to
return to the heater.
3. Positioning the Unit
.
Free standing air heaters must be positioned
on a level base that is capable of supporting
the full weight of the unit.
Ensure that sufficient clearance is allowed
for, and maintained, around the heater to
facilitate easy access to the burner, main fan
assembly and heat exchanger for servicing
purposes and to allow unrestricted passage
of the return air unless the system is ducted.
WARNING:-
Clearance should be allowed for the
pressure relief to operate.
4. Combustion and
Ventilation Requirements.
Combustion Air
It is important to ensure that there is
sufficient air for combustion, especially
when a heater is positioned in an enclosed
area i.e.plant room.
The air supply requirements shown relate to
the total rated input of the heater(s). Size of
air vent given is for air direct from outside
and relates to the free area of the grill.
