Space-Ray LRDL15, Assembly, Installation And Operation Instructions

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Form #44201117
-34- Dec 2021
Fig. 27
13.1
Type A
2
:
Outside (ducted) combustion air supply. When installed in a dusty or polluted atmosphere, the heater
should be fitted with a ducted supply of clean fresh air. A length of 100mm flexible ducting should be
installed between the Control Box Air Inlet and any rigid ducting and be secured to the Air Inlet with hose
clips.
Where outside combustion air is ducted directly to the burner(s) the low level natural ventilation openings
shall be not less than 50

of the areas given in Section 13 above.
13.2 Type C
12 +
C
32
:
When installing external flue single duct systems with ducted combustion air supply the distance between
the flue terminal and fresh air intake shall be no less than 1 m for both vertical and horizontal systems
13.3
Type C
52
:
When fresh air for combustion and the flue outlet are from different pressures zones as shown in figure 27,
the flue outlet and the fresh air intake must not be on surfaces that are 180 degrees apart. The acceptable
configurations are those shown in figure 27 in combination with the maximum lengths listed on table 13.