Thermo Pride Gas/Propane Furnace Concentric Vent (CMA) - Manual (Page 4)

ALL INSTALLATIONS AND SERVICE MUST BE PERFORMED BY QUALIFIED SERVICE PERSONNEL.
8. Drop 3” pipe assembly (FIG-3) thru 4” flue opening of roof jack, seat Fernco fitting firmly
on roof jack flue pipe and tighten clamp.
9. Drop 2” pipe assembly (FIG-4) thru 3” pvc pipe, seat rain cap tightly on end of 3” pvc
pipe.
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.
10. At this point the WYE fitting can be applied using PVC cement to affix it to the 3”
diameter pipe, see FIG-5.
11. 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-5.
- 4 -