Comfortflame.US.com
900578-00_NC
5
INSTALLATION
CAUTION: Do not remove the data plates attached
to the burner pan. The data plates contain important
warranty and safety information.
WARNING: Before installing in a solid fuel burning
fireplace, the chimney flue and firebox must be cleaned
of soot, creosote, ashes and loose paint by a qualified
chimney cleaner. Creosote will ignite if highly heated.
A dirty chimney flue may create and distribute soot
within the house. Inspect chimney flue for damage. If
damaged, repair flue before operating heater.
NOTICE: Installation, service, and repair of this ap-
pliance must be performed by a qualified installer,
service agency, company or gas supplier experienced
with this type of gas appliance. Only factory authorized
components listed in these instructions may be used
in accordance with the manufacturer’s instructions
and all codes and requirements of the authority hav-
ing jurisdiction. Any modifications to this kit, or use
of unauthorized components or accessory items will
void the manufacturer’s warranty, and may result in
a hazardous condition.
FLUE OPENING SPECIFICATIONS
Note:
This vented appliance must be installed only in a solid-fuel
burning fireplace with a working flue and constructed of noncom-
bustible material.
The charts in Figure 2, indicate technical information regarding
the installation of your gas log set. Please make sure that all of the
specifications shown are applicable before installation is attempted.
The fireplace must include a working flue and venting system with
the minimum openings shown in the Figure 2.
BURNER ORIFICE
LOG
NATURAL
PROPANE/LP
SIZE
IN.
NUM.
IN.
NUM.
Oxford18LZN,
Amherst18LZN
Berkshire18LZN
0.120
31
0.073
49
Oxford24LZN,
Amherst24LZN
Berkshire24LZN,
Mendocino18LZN
0.129
30
0.086
44
Mendocino24LZN
0.1405
28
0.089
43
Model
Burner De-
scription
Btu/Hr Input
Natural Gas
Btu/Hr Input
Propane/LP
Gas
Minimum
Vent Open-
ing
Amherst18LZN
Oxford18LZN
18" Single
50,000
40,000
8" dia.
Amherst24LZN
Oxford24LZN
24" Single
60,000
50,000
8" dia.
Berkshire18LZN
18" Dual
55,000
45,000
8" dia.
Berkshire18LZN
Berkshire24LZN
24" Dual
65,000
55,000
8" dia.
Mendocino18LZN
18" Triple
65,000
55,000
8" dia.
Mendocino24LZN
24" Triple
70,000
60,000
8" dia.
*Add 6" if safety valve/pilot is used
**At depth indicated
FUEL INLET PRESSURE SPECIFICATIONS (W.C.)
Min.
Max.
NG
5.5"
10.5"
LP
11"
13"
Figure 2 - Technical Information Charts
MINIMUM FIREBOX SIZES
Models:
Amherst18LZN, Oxford18LZN, Berkshire18LZN
Front Width*
Back Width**
Depth
Height
28"
16"
14"
18"
Models:
Amherst24LZN, Oxford24LZN, Berkshire24LZN
Front Width*
Back Width**
Depth
Height
29
3
/
4
"
17"
15
1
/
2
"
18"
Model:
Mendocino18LZN
Front Width*
Back Width**
Depth
Height
28"
16"
15
1
/
2
"
18"
Model:
Mendocino24LZN
Front Width*
Back Width**
Depth
Height
30"
22"
15
1
/
2
"
18"
