Sure Heat VFMP Vent-Free - Manual (Page 4)

Check the type of gas that is supplied to your fireplace. Use only the gas type indicated on the heater's rating plate. If
the gas listed on the plate is not your type of gas supply, DO NOT INSTALL THE SYSTEM. Contact your dealer for the
proper model.
All gas piping must be installed to comply with local and national fuel gas codes. Do not use flexible hose unless it is
allowed by local codes. Compounds used on threaded joints of gas piping musts be resistant to the action of LP gas.
The gas supply line to the fireplace should not be less than 1/2" inside dimension.
The gas supply must be of sufficient size to provide a minimum natural gas pressure of 7 inches water column for natural
gas or 11 inches for L.P. gas. The maximum inlet gas pressure to the appliance must not exceed 10 inches for natural
gas and 13 inches for L.P. gas. If this appliance is to be supplied with L.P. gas the tank or bottle supplying the gas must
have a regulator that reduces gas pressure between 11 and 13 inches water column.
Include a manual shutoff valve and union in the line so the appliance may be disconnected for servicing. Provide a 1/8"
NPT plugged tapping for pressure gauge connection between shutoff valve and the appliance. Test for leaks using soap
and water solution after completing the connection. DO NOT USE OPEN FLAME!
WARNING: The appliance and its individual shutoff valve must be disconnected from the gas supply piping
system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5
kPa). The appliance must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
test pressures equal to or less than 1/2 psig. Pressures in excess of 1/2 psig will cause damage
to the unit.
To guarantee safe installation into a noncombustible fireplace, certain space requirements must be fulfilled.
1. The clearance from the side of the unit to any combustible wall should not be less than 15 1/2 inches.
2. The clearance from the ceiling to the top of the fireplace opening should not be less than 42 inches.
3. The minimum clearance to combustible items in front of the heat is 36 inches.
4. For any fireplace in which this unit is installed, there are certain mantel clearance requirements that
must be met.
You must have non-combustible material(s) above the fireplace opening. Non-combustible materials (such
as slate, marble, tile, etc.) must be at least 1/2 inch thick. Some decorative fireplace surrounds (cultured
marble) may get discolored from the heat produced by the system. With sheet metal, you must have
non-combustible material behind it. If non-combustible material is less than 8" you must install fireplace canopy (Model AMG-100).
Minimum Mantel Clearance
MINIMUM
NON-COMBUSTIBLE
MATERIAL HEIGHT
DISTANCES TO
UNDERSIDE
OF MANTEL
TOP OF
FIREPLACE
OPENING
MINIMUM
NON-COMBUSTIBLE
MATERIAL
MANTEL 10”
8”
6”
2 1/2”
UNDERSIDE
OF MANTEL
12”
8”
20” 24” 27” 30”
14” 17” 18” 20”
24” / 21” MODEL
18” MODEL
DISTANCES TO
UNDERSIDE
OF MANTEL
TOP OF
FIREPLACE
OPENING
MINIMUM
NON-COMBUSTIBLE
MATERIAL
MANTEL
10”
8”
6”
2 1/2”
UNDERSIDE
OF MANTEL
8”
MIN
12” 15” 20”
12”
18”
(CLEARANCES
FOR ALL
LOG SETS)
CANOPY
Minimum Mantel Clearance with Canopy
FIREPLACE CLEARANCES
GAS PIPING AND GAS PRESSURE REQUIREMENTS
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