Thermo Pride Gas/Propane Furnace Concentric Vent (CMA) - Manual (Page 10)

ALL INSTALLATIONS AND SERVICE MUST BE PERFORMED BY QUALIFIED SERVICE PERSONNEL.
8. Apply PVC cement to pipe end of the 2” pipe assembly (FIG-10) and slide thru 3” pipe,
seating 2” pipe in WYE fitting internal socket and rain cap tightly on end of 3” pvc pipe,
see FIG-11.
CARBON MONOXIDE POISONING, FIRE AND EXPLOSION HAZARD.
Failure to follow this warning could result in death, personal injury and/or property damage.
Do not operate the furnace with the rain cap removed as recirculation of the flue gases may
occur. Water may also collect inside the larger combustion air pipe and flow to the burner
enclosure.
9. Using field supplied PVC pipe and elbows connect the center vent pipe on the WYE
fitting to the exhaust vent pipe on the furnace and the 45
° air intake pipe on the WYE
fitting to the combustion air intake pipe on the furnace. PVC cement all joints except for
the final connection to the furnace. Use radiator hose fittings and clamps included with
furnace to make final connection, see FIG-11.
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