DV Power Vent System
General Information and Instructions for the
•This DV Power Vent System was designed to be used only on units with electronic ignition (EN or EP).
•This DV Power Vent System was certified by CSA to be used only with CFM Corporation Direct Vent models, as listed in this manual.
•This DV Power Vent System can be used with any CFM Corporation side wall vent termination kits, vertical vent termination kits or snorkel kits (rear vent termination not to be used).
•This DV Power Vent System must be installed by a qualified professional according to these instructions.
•Plan the venting layout before starting the installa- tion.
•Maximum TOTAL allowable system length is 40FT of straight pipe, plus up to five 90 degree elbows. Any combination of 45 and 90 degree elbows up to a maximum of 450 degrees is allowed. It is NOT per- missible to substitute elbows for length of horizontal or vertical straight pipe.
•Can be vented down to a maximum of 12FT, meas- ured from the center line of the highest section to the centre line of the lowest section between the fireplace and the DV Power Vent box.
•Minimum vent length of straight pipe between fire- place and the DV Power Vent box is:
10 feet for units with input up to 33,000BTU/h;
15 feet for units with inputs from 33,000BTU/h to 40,000BTU/h.
•Maximum vent length of straight pipe between the DV Power Vent System box and the vent termination is 6 FT.
•Only vent components manufactured by CFM Corpo- ration are approved for use with this DV Power Vent System.
•All 4” and 7” venting connections
•The 4” and 7” pipes connected to the inlet side of the DV Power Vent System box to be fitted inside the 4” pipe and the 7” collar.
•Leave a permanent access for inspection and service of the DV Power Vent System box.
•Confined area definition: when the distance of the four walls around the sides of the Power Vent Box to the
•When the DV Power Vent box is installed in a con- fined area, the access door needs to have a mini- mum size of 12” X 12” and it must be ventilated with a minimum of 10% open area. In a confined area installation a minimum distance of 12” (1FT), needs to be left between the Power Vent Box and the fifth wall. (Refer to Figures on Page 5).
•When the DV Power Vent box is installed in an un- confined area, the access door doesn’t need to be ventilated.
•The power vent motor shaft MUST ALWAYS BE ori- ented horizontally for proper operation.
•The pressure switch diaphragm MUST ALWAYS BE, in a vertical position and the hose connection point- ing down, NEVER up.
•Disconnect power supply when installing or servicing the fireplace or the power vent system.
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