Space-Ray PCA-SS 100, Assembly, Installation And Operation Instructions, Page: 42 / 62

Form 43343110
May 2021
-41-
15.2) AIR FOR COMBUSTION – THROUGH CEILING
If the heater is installed less than 2 ft. from the ceiling, a flexible transition section must be used to allow for
expansion/contraction of straight tube heaters. Install the fresh air intake assembly (supplied in accessory Kit no.
44129500) shown below.
In colder climates, where necessary, insulate the outside combustion air duct. Avoid locating the outside
combustion air duct directly above the control box. Provide a capped cleanout T as necessary.
The Cold Air Stopper (supplied as accessory) is installed into the combustion air inlet duct and is used to prevent
cold air from entering the control unit during periods where the burner and draft inducer are off.
Flexible Air Intake Hose: Insure that the Air Intake Hose connection is not too tight between the control box and
the Air Intake. The air intake hose can become disconnected as the heater expands and contracts during
operation.