While the unit is equipped with an induced draft fan, proper size vent must be provided to remove the gases of combustion. It is recommended that a 4" to 5" increaser be used for venting the 87CPO and 108CPO and a 4" to 6" increaser be used for the 128CPO. For abnormal runs (exceeding 10 ft.), consult factory.
Vent and breeching must be gas tight by sealing with asbestos or thermo-setting pressure sensitive tape.
DRAFT REGULATOR
It is recommended that a draft regulator be installed in chimney flue just below the flue pipe opening, if the unit is attached to an extremely high chimney; an unlined chimney; or a chimney which is constructed on the exterior of the house.
CONTROLS AND TRIM
Controls are installed in place at the Factory. Attach thermo-altimeter in 1/2" tapping in top front of boiler. Install 3/4" × close nipple in 3/4" top connection with 3/4" × 3/4" × 1/2" Tee. 3/4" Tee opening for installation of the relief valve and 1/2" opening for expansion tank.
WIRING
Controls are all in place and wired at the factory except connection to circulator.
REGULATING OIL PRESSURE
Standard nozzles furnished with the burner will produce the stamped rated capacity when used with Commercial Standard No. 2 Fuel Oil, and operated with a pressure of 100 lbs. per square inch. The standard setting of the fuel unit is 100 lbs. Due to difference in tank elevations, the pressure should be adjusted at the time of start up.