901915-01B
For more information, visit www.desatech.com
For more information, visit www.desatech.com
5
5
CHECK GAS TYPE
Use only natural gas. If your gas supply is not natural gas, you must
install ON/OFF Safety Valve/Pilot Kit (see Accessories, page 17).
Call dealer where you bought log set.
If the fireplace does not have a gas supply shut-off valve, one must
be installed.
VENTING SPECIFICATIONS FOR
INSTALLATION
The fireplace chimney flue and vent must be drafting properly. To
check the vent for proper drafting: Light a tightly rolled newspaper
on one end and place it at the inside front edge of the fireplace.
Observe the smoke and be sure the vent is properly drawing it up the
chimney. If the smoke spills out into the room, extinguish the flame
and remove any obstruction until proper venting is achieved.
The chimney flue must remain open a minimum of 3" at all times
during the operation of this log set.
MODEL
DESCRIPTION
HFVMR18
18" Multi-Side
55,000
45,000
8" dia.
HFVMR24
24" Multi-Side
65,000
55,000
8" dia.
Btu Input
Natural
Gas
Btu Input
Propane/LP
Gas
Minimum
Vent
Opening
MINIMUM FIREBOX SIZES
LOG
FRONT
BACK
SIZE WIDTH* WIDTH**
DEPTH HEIGHT
18"
28"
28"
16"
18"
24"
29
3
/
4
"
29
3
/
4
"
16"
18"
* 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
BURNER ORIFICE
LOG
NATURAL
PROPANE/LP
SIZE
IN.
NUM.
IN.
NUM.
18"
.111
34
.073
49
24"
.129
30
.086
44
INSTALLATION
Continued
INSTALLING DAMPER CLAMP
Secure the damper stop clamp provided to the leading edge of the
damper as shown in Figure 3. If for any reason this clamp doesn't
work on your fireplace, another suitable clamp or permanent stop
must be installed, or the damper blade must be cut or removed.
Manufactured Fireplace
Masonry Fireplace
Damper Clamp
Damper
Damper
Damper Clamp
Damper
Figure 3 - Attaching Damper Clamp
CONNECTING TO GAS SUPPLY
WARNING: A qualified service person must con-
nect log set to gas supply. Follow all local codes.
Installation Items Needed
Before installing log set, make sure you have the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve
• test gauge connection
• adjustable (crescent) wrench or pliers
• sediment trap
• tee joint
• pipe wrench
CAUTION: Use only new, black iron or steel pipe.
Internally-tinned copper tubing may be used in certain
areas. Check your local codes. Use pipe of 1/2" diam-
eter or greater to allow proper gas volume to log set. If
pipe is too small, undue loss of volume will occur.
INSTALLATION
Flue Opening Specifications (Cont.)
Check Gas Type
Venting Specifications for Installation
Installing Damper Clamp
Connecting To Gas Supply
