20
Alpine SE42 Direct Vent Gas Fireplace
POSITIVE PRESSURE SYSTEM
If the appliance is to be installed into existing
construction, or if there is no possibility of mounting the
blower within the chase enclosure, the blower housing
must be extended outside the house (see figures 23 and 24)
or into a ventilated attic . The recessed blower housing may
be adapted to an extended assembly by covering the bottom
opening with screen. You may also order the extended
housing assembly from Alpine.
A good quality 6” galvanized heating duct should be used
for the positive pressure system. The ducting joints should
be mechanically fastened and sealed with aluminum duct
tape. Connect the ducting to the 6” opening on either the
left or the right side of the fireplace. The intake is
reversible and can be set up on either side. Ensure that the
unused side has the cover plate reinstalled and is sealed air
tight (see figure 25).
Fig. 14– Extended Blower Installation
Fig. 15– Extended Blower
Positive Pressure
Connector
Positive Pressure
Air Intake
6" Duct
Fig. 25 – Positive Pressure Connection
While installing the positive pressure system, ensure that a
14/2 grounded sheathed electrical cable is connected to the
blower and routed to the blower control location. The
blower needs to be grounded upon installation by
connecting the ground line from the sheathed cable to the
blower as well as a grounding connector in the junction
box (see wiring instructions on page 20 of this manual).
Some installations make it necessary to run the positive
pressure ducting up into a ventilated attic, or down and out
floor joists below the appliance, or into a garage then to an
outside wall or ventilated attic space (see figure 26).
Extended Fan
Assembly
Grill
Inline Blower
Assembly
Extended Fan
Assembly
Fig.26 – Possible Blower Locations
NOTE: When installing the positive pressure system,
always follow local mechanical codes.
