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DV Power Vent System
16
10003262
If there is a need to change the restrictor plate orifice on the DV Power Vent System box, follow the steps below:
A. Turn the power OFF to fireplace and power vent.
B. Remove the blower’s cover (two parts):
• Remove the hose attached to the blower casing.
• Remove two screws. Refer to Figure A.
• Remove two nuts from the right side cover.
• Remove the right side cover by pulling it out. Refer to Figure B.
• Remove two nuts from the left side cover.
• Remove the left side cover by pulling it out. Refer to Figure C.
C. Remove the two nuts that hold the pressure switch bracket. Do not disconnect any wire or the hose. Just bring the
pressure switch still attached to the bracket to a rest position, to give you access to the screws that hold the blower
bracket. Refer to Figure D.
D. Disconnect the wires from the blower.
E. Remove the four screws that hold the blower bracket. Be careful not to drop the blower.
F. Slide down the blower to release it from the top extrusion and carefully bring the sub-assembly (blower with the bracket
and the gasket) to the outside of the box to replace the orifice; Be careful not to damage the gasket, otherwise you
will have to replace it. Refer to Figure E.
G. Remove the two 3/8” nuts holding the orifice plate. Refer to Figure F.
H. Get from the orifice plate kit the correct restrictor orifice size for the unit you are installing (check chart for restrictor
orifice size X unit model).
I. Install the correct orifice plate into the same location as the previous one.
J. Place back the two nuts.
K. Reinstall the blower. Make sure the exhaust of the blower is properly inserted into the opening.
L. Re-attach the blower bracket with the four screws removed in step “C”.
M. Connect the wires to the blower (see wiring diagram).
N. Re-attach the pressure switch to the original position and secure the two nuts removed in step “B”.
O. Re-install both covers to the blower:
• Install the left side and secure it with the nuts.
• Install the right side and secure it with the nuts.
• Re-attach the two screws.
• Re-attach the hose to the blower connection.
P. Check all wires according to the wiring diagram and the hose connections to make sure everything is properly
in place.
Changing the Orifice Plate After the DV Power Vent Box is Installed