Page 135 - 2017-Swift-Group-Motorhomes-Handbook-web
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BLOWN AIR OUTLETS
FITTED EQUIPMENT Truma heating system and air flow The blown air fittings can also be rotated to
adjust the direction of air leaving the outlet,
The Swift Group undertakes considerable as shown in the photo below.
testing of our products in cold chambers to
ensure they meet the BS EN 1649 Grade 3 Blown air
standard and are usable in cold temperatures. The air ducting outlets are generally of the
butterfly type and may be opened or closed by
Butterfly outlets adjusting the butterfly valves. Twisting the disc
in its housing directs the flow in the direction
The air ducting outlets on models equipped required.
with Truma Combi heating systems, are of the Some outlets do not feature butterfly valves
butterfly type. These may be opened or closed and must remain fully open.
by moving the flap within the fitting, to adjust One outlet on each leg of the air ducting layout
the balance of the heating output throughout must be kept open at all times. Under no
the caravan. This can help offset differences circumstances should the air ducting outlets
in blown air output, between outlets close to be blocked.
the heating appliance, and those at a greater
distance away from the heating appliance.
This can also help adjust the temperature of
the bathroom, relative to the temperature of
the main living area and/or bedroom.
When these outlet butterflies are closed
in conjunction with a high heating system
output, and therefore a high fan speed, a
slight whistling sound can occur. In this case,
opening the outlet slightly will reduce or
remove the noise.
Closing too many outlets when the heating
system is producing a high output, can
cause the appliance to reach high operating
temperatures. This does not in general terms
affect the appliance, but it can cause the
appliance to automatically shut down.
This can cause an interruption of the heating
of the caravan, how ever heating will resume
when the appliance temperatures have
reduced to a lower level.
The output of the appliance, and therefore the
output of the blown air outlets, will generally be
higher when using Gas or Dual Fuel operation.
Electric only operation of the heating is rated
at up to 1.8kw, whereas Gas (or Dual Fuel)
operation is rated at up to 4kw (3.8kw) or 6kw
(5.8kw), depending which model of Combi is
fitted.
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