Vermont Casting RHE42 - Manual (Page 9)

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Vermont Castings, Majestic Products RHE Natural Vent Insert
4. Flue damper must be fully blocked in the open
position or removed for installation.
5. The chimney must be clean and in good working
order and constructed of noncombustible materials.
6. Make sure that all chimney cleanouts fit properly so
air cannot leak into the chimney.
7. Glass door, screen kits and log grate may be
removed for installation of insert into factory built
fireplace.
8. Install the insert without the trim frame and make all
gas, venting and electrical connections.
9. Install decorative trim frame. Please refer to Frame
Assembly and Mounting instructions on this manual.
Liner Installation
Insert liner from top of chimney through the damper
opening and attach to 3" flue collar (for RHE25); 4" flue
collar (for RHE32 & RHE42). For best results use
three (3) sheet metal screws and a hose clamp.
For natural draft inserts packing fibreglass insulation
around the liner in the damper area will isolate the
fireplace cavity from the chimney and prevent drafts
and noises during operation.
In case the fireplace opening is only minimum height
(17
¹⁄₂ " for RHE25) (20" for RHE32) (22 ³⁄₄ " for RHE42)
and access from the front is not possible, remove the
flue collar plate - unscrew and slide out from the back
of the unit. Now attach the liner to the flue collar, lift up
and simply slide flue collar plate back onto the unit top.
It is important the plate is completely inserted and the
front screw is fastened again in order to line up the flue
outlet and the liner properly. (Fig. 10)
If fireplace lintel is wider than 8"
(205mm), the height of the fireplace
opening must be 25" (635mm) to allow
for a 90
°
offset elbow to be installed.
Damper
Flue
Collar Plate
Clamp
Chimney
Liner
Screw
Chimney Liner
Damper
Clamp
FP1354
Fig. 10 Remove flue collar plate and attach to flue collar.
Common Flue Installations
In some areas it is possible to vent more than one gas
fireplace into the same flue. You must ensure the flue
being shared has the proper capacity to handle both
fireplaces. Check installation codes for venting capacity
information.
As always it is best to check with the authority having
jurisdiction prior to commencement of the installation.
Draft Relief Opening
This insert is equipped with a draft-relief opening which
receives its dilution air supply through the opening
behind the louvres. These openings must not be
obstructed or altered in any way. (Fig. 11)
Test Chimney Draw
A "Chimney Draw" test must be made before the
installation is complete.
1. Close all doors and windows in the home and start
exhaust fans in the kitchen and bathroom.
2. Light unit and operate for 5 minutes.
3. Hold an ignited match or cigarette in front of the
unit. Refer to Figure 11 for the location of the draft
hood opening.
4. Check to make sure smoke from the match or
cigarette is drawn into the fireplace. If it is not, turn
the unit off and check for causes creating the lack of
adequate draft.
Vent Safety System
These inserts are equipped with a vent safety shut
down switch. This switch is factory installed, wired and
tested. Check and make sure the switch and wires are
in the proper position. The safety switch is heat acti-
vated and wired in series with the pilot system. (Fig. 12)
Test for Draft at This Location
FP1371
Fig. 11 Hold an ignited match in front of fireplace.
Bracket
Vent Safety
Switch
FP1372
Fig. 12 Vent safety switch.