Framing And Finishing; Final Finishing; Gas Specifications; Gas Inlet And Manifold Pressures - Vermont Castings 33XDV Installation Instructions And Homeowner's Manual

Framing and Finishing

Check fireplace to make sure it is levelled
and properly positioned.
To mount the appliance:
1. Choose the location.
2. This unit comes with four (4) flanges pre-mounted
on both sides of the fireplace to allow two different
drywall thicknesses to be used. Flange "A" is for
1/2" drywall while flange "B" is for 5/8" drywall.
3. Bend the desired flanges out 90° on both sides of
the fireplace. Slide the fireplace into the framed
opening until the flanges contact the front surfaces
of the framing. Level the unit and secure it firmly in
place.
Flange Drywall
Position Depth
A 1/2" / 13 mm
B 5/8" / 16 mm
A
B
Fig. 5 Nailing flanges.

Final Finishing

Noncombustible materials such as brick or tile may be
extended over the edges of the face of the fireplace.
DO NOT cover any vent or grille panels.
If a Trim Kit is going to be installed on the fireplace, the
brick or tile will have to be installed flush with the edges
of the fireplace.
33XDV / 36XDV / 39XDV
Certified To
ANSI Z21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
Units: GFDN3L1, GFDE3L1, GFDN3J1, GFDI3J1,
GFDE3JI, GFDN3K1, GFDE3K1
10009383
Flange Location for
Desired Drywall Depth
FP1539
FP1539a
flanges w/standoffs
5/05
Gas Specifications
Model Fuel Gas Control
33XDVRN Nat. Millivolt Hi/Lo
33XDVRP Prop. Millivolt Hi/Lo
33XDVEN Nat. 24 Volt Hi/Lo
33XDVEP Prop. 24 Volt Hi/Lo
36XDVRN Nat. Millivolt Hi/Lo
36XDVRP Prop. Millivolt Hi/Lo
36XDVRFN Nat. Comfort Contrl 27,500
36XDVRFP Prop. Comfort Contrl 27,500
36XDVEN Nat. 24 Volt Hi/Lo
36XDVEP Prop. 24 Volt Hi/Lo
39XDVRN Nat. Millivolt Hi/Lo
39XDVRP Prop. Millivolt Hi/Lo
39XDVEN Nat 24 Volt Hi/Lo
39XDVEP Prop 24 Volt Hi/Lo

Gas Inlet and Manifold Pressures

Inlet Minimum
Inlet Maximum
Manifold Pressure

High Elevations

Input ratings are shown in BTU per hour and are
certified without deration for elevations up to
4,500 feet (1,370m) above sea level.
For elevations above 4,500 feet (1,370m) in USA,
installations must be in accordance with the cur-
rent ANSI Z223.1/NFPA 54 and/or local codes hav-
ing jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at
elevations above 4,500 feet (1,370m).

Gas Line Installation

When purging the gas lines, the front win-
dow frame assembly must be removed.
The gas pipeline can be brought in through the rear
of the appliance as well as the bottom. Knockouts are
provided on the bottom behind the valve to allow for the
gas pipe installation and testing of any gas connection.
It is most convenient to bring the gas line in from the
rear right side of the valve as this allows fan installation
or removal without disconnecting the gas line.
XDV Direct Vent Gas Fireplace
Max. Min.
Input Input
BTU/h BTU/h
21,500 4,400
21,500 5,425
21,500 4,400
21,500 5,425
27,500 5,150
27,500 5,500
5,810
6,225
27,500 5,150
27,500 5,500
30,000 6,700
30,000 5,800
30,000 6,700
30,000 5,800
Natural LP (Propane)
5.5" w.c. 11.0" w.c.
14.0" w.c. 14.0" w.c.
3.5" w.c. 10.0" w.c.
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