3
20002538
Installation Requirements
The fireplace must meet the minimum dimensions listed below. (Fig. 1) Do not install the logset if the fireplace does
not meet these minimums.
Pressure Test Points
Copreci Valve: 1/8” N.P.T. plugged tapping is provided
on the outlet side of the gas control for a test manifold
pressure.
SIT Valve: Inlet and manifold taps are provided on the
right side of the valve.
Proposition 65 Warning:
Fuels used in gas, wood-
burning or oil fired appliances, and the products of
combustion of such fuels, contain chemicals known
to the State of California to cause cancer, birth de-
fects and other reproductive harm.
California Health & Safety Code Sec. 25249.6
FD370-2
Fireplace
dimensions/vl18
3/25/99
A
B
D
C
A. Front Width B. Rear Width C. Depth D. Height
FD370-2
Fig. 1
Minimum fireplace dimensions.
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration from elevations up to
4,500 feet (1,370 m) above sea level.
Nuisance outages may occur at altitudes above
4,500 feet (1,370 m) if dirt, dust, lint and/or cob-
webs are allowed to accumulate on burner and/or
ODS pilot. Monthly inspection and cleaning is
recommended for altitudes above 4,500 feet
(1,370 m)
For elevations above 4,500 feet (1,370m) in USA,
installations must be in accordance with the
current ANSI Z223.1/NFPA 54 and/or local codes
having jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at
elevations above 4,500 feet (1,370 m)
Odor During Operation
Neither natural gas nor propane gas give off an odor
when burned. The nature of a vent free combustion
system, however, is such that odors may occasionally
be produced during heater operation when impurities
exist in the immediate area. Cleaning solutions, paint,
solvents, cigarette smoke, candles, adhesives, new car-
pet or textiles, etc., all can create fumes. These fumes
may mix with combustion air and can create odor. Such
odors will disappear over time, however, the condition
can be alleviated by opening a window or otherwise
providing additional ventilation to the area.
Min. Fireplace Dimensions
Inlet Supply
Min.
Max.
Air
Logset
Gas
Front
Rear Overall Overall Pressure (w.c.) Manifold Input
Input
Shutter
Width Width Depth Height
Min. Max.
Pressure BTU/hr
BTU/hr
Setting
18” VL18
21”
16
¹⁄₂
”
13
¹⁄₂
”
17”
5.0 10.5
3.5
15,000
24,000 .188” Open
21” VL21
Natural
21”
18
¹⁄₂
”
13
¹⁄₂
”
17”
5.0 10.5
3.5
18,000
32,000 .250” Open
24” VL24
25”
18
¹⁄₂
”
13
¹⁄₂
”
17”
5.0 10.5
3.5
18,000
35,000 .375” Open
Cop. SIT
18” VL18LP
21”
16
¹⁄₂
”
13
¹⁄₂
”
17”
11.0 14.0
8.5 10.0 15,000 24,000 Full Open
21” VL21LP Propane 21”
18
¹⁄₂
”
13
¹⁄₂
”
17”
11.0 14.0
8.5 10.0 18,000 32,000 Full Open
24” VL24LP
25”
18
¹⁄₂
”
13
¹⁄₂
”
17”
11.0 14.0
8.5 10.0 18,000 35,000 Full Open
