page no. 13 of 40
VPx Range Users, Installation & Servicing Instructions Doc Ref M205 issue 1.2 Nov 2018.
1.3.7 Air Distribution System
VPC units used in buildings having a low heat loss i.e.
where single units are required to cover a large floor
area,and in buildings with high roof or ceiling heights
Calecon thermal economiser units may be considered to
ensure even heat distribution and minimise stratification.
Care should be taken to avoid impeding the air throw with
racking, partitions, plant or machinery etc. Various outlet
configurations are available as optional extras to modify
the air throw pattern to suit particular site conditions.
For VPx UD units, the duct work must comply to current
regulations and be correctly calculated to match the
particular heaters resistance and air flow.
A full and unobstructed return air path to the air heater(s)
must be provided.
If the air heater(s) are installed in a plant room, the return
air intake(s) and the warm air outlet(s) from the heater(s)
must be fully ducted, into and out of the plant room to
avoid interference with the operation of the heater.
The openings in the structure of the plant room/enclosure
through which the ducting passes must be fire stopped.
Care must be taken to ensure that return-air intakes are
kept clear of sources of smells and fumes, and where
there is any possibility of pollution of the air by dust,
shavings etc., precautions must be taken to prevent
contamination.
If necessary, suitable barrier rails should be provided to
prevent any combustible material being placed within
900mm of the outlets.
Model
Air Volume Max Duct Resistance
m³/h (Pa)
VPx35 UD 4000 200
VPx50 UD 5450 250
VPx70 UD 7000 250
VPx90 UD 10100 180
VPx120 UD 12800 290
VPx140 UD 13500 250
1.3.7.1 Ducting Requirements
It is recommended that
you have a minimum
of 2000mm from the
heater outlet prior to
any restriction
Airflow
1.3 General Requirements
VPx Heater
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