page no. 19 of 44
NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
1.3.7 Air Distribution System
Where NVx/F 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 NVx/CCF 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) is 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 m³/h
Maximum Duct Resistance
NVx15CCF
1512
220
NVx20CCF
2016
320
NVx25CCF
2808
220
NVx30CCF
3816
220
NVx40CCF
4248
150
NVx50CCF
5436
250
NVx60CCF
3588
250
NVx75CCF
9216
250
NVx90SF/CCF
10116
180
NVx120SF/CCF
12816
290
NVx140SF/CCF
13500
250
1.3.7.1 Ducting Requirements
NVxCCF heater unit
