Desa VYM27NRPR - Manual (Page 10)

110398-01A
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10
Area of Various Standard
Round Flues
Diameter (ins.) Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
INSTALLING DAMPER CLAMP ACCESSORY
FOR VENTED OPERATION
Note: When used as a vented heater, appliance must be installed
only in a solid-fuel burning fireplace with a working flue and
constructed of noncombustible material.
If your heater is a manually controlled model, you may use this
heater as a vented product. There are three reasons for operating
your heater in the vented mode:
1.
The fireplace does not meet the clearance to combustibles re-
quirements for vent-free operation
2. State or local codes do not permit vent-free operation
3. You prefer vented operation
If reasons number 1 or 2 above apply to you, you must permanently
open chimney flue damper. You must install the damper clamp
accessory (to order, see Accessories, page 24). This will insure vented
operation (see Figure 10). The damper clamp will keep damper open.
Installation instructions are included with clamp accessory.
See chart below for minimum permanent flue opening you must
provide. Attach damper clamp so the minimum permanent flue
opening will be maintained at all times.
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Figure 10 - Attaching Damper Clamp
Masonry Fireplace Manufactured Fireplace
Damper
Damper
Damper
Clamp
INSTALLING HEATER BASE ASSEMBLY
WARNING: If installing in a sunken fireplace, special
care is needed. You must raise the fireplace floor to
allow access to heater control panel. This will insure
adequate air flow and guard against sooting and con-
trols being damaged. Raise fireplace floor with non-
combustible material. Make sure material is secure.
CAUTION: Do not pick up heater base assembly by
the burner. This could damage heater. Only handle
base assembly by grates.
WARNING: You must secure this heater to fire-
place floor. If not, heater will move when you adjust
controls. Moving heater may cause a gas leak.
IMPORTANT: Make sure the heater burner is level. If heater is not
level, heater will not work properly.
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose (not provided) (if allowed by local codes)
• sealant (resistant to propane/LP gas, not provided)
• electric drill with 3/16" drill bit (metal or masonry as applicable)
• flathead screwdriver
1. Apply pipe joint sealant lightly to male NPT threads of the
fitting to be threaded into gas control. Connect approved flex-
ible gas hose to gas control fitting in heater (see Figure 11).
IMPORTANT: Hold gas fitting with wrench when connect-
ing flexible gas hose.
2. Locate two masonry screws in hardware package.
3. Place heater base in fireplace.
WARNING: Do not remove the data plates at-
tached to the heater base assembly. The data plates
contain important warranty and safety information.
INSTALLATION
Continued
Fitting
Flexible Gas
Hose (if allowed
by local codes)
Figure 11 - Attaching Flexible Gas Hose to Heater
INSTALLATION
Installing Damper Clamp Accessory For Vented Operation
Installing Heater Base Assembly
Damper
Clamp