Page 135 - 2017-Swift-Group-Motorhomes-Handbook-web
P. 135

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.

122
   130   131   132   133   134   135   136   137   138   139   140