HearthSense MO18HVL Manual page 8

Installation and Gas Connection
1. Place the burner pan assembly in the
center of the fireplace floor. Make sure
the front of pan faces forward.
2. Thread the gas supply fitting to the fire-
place gas supply pipe. Use thread sealant.
3. Install adapter fitting onto the burner inlet
fitting using thread sealant on male threads
of burner inlet fitting (see Figure 4).
4. Install the gas connector tube to the gas
supply fitting. Carefully shape tube to at-
tach to adapter fitting.
WARNING: A qualified ser-
vice person must connect 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 natural gas)
• equipment shutoff valve
• test gauge connection
• adjustable (crescent) wrench or pliers
• sediment trap
• tee joint
• pipe wrench
CAUTION: Only use a new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" diameter or greater to allow
proper gas volume to log set. If
pipe is too small, loss of pres-
sure will occur.
Installation must include an equipment shut-
off valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from log
set (see Figure 5).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment
shutoff valve is for turning on or shutting off
the gas to the appliance.
8
INSTALLATION
CONNECTION TO GAS SUPPLY
HearthSense
Burner Pan Assembly
(Facing Front of
Fireplace)
Figure 4 - Connecting Gas to Appliance
Apply pipe joint sealant lightly to male threads.
This will prevent excess sealant from going
into pipe. Excess sealant in pipe could result
in a clogged burner injector.
Install sediment trap in supply line as shown
in Figure 5. Locate sediment trap where it is
within reach for cleaning. Locate sediment
trap where trapped matter is not likely to
freeze. A sediment trap traps moisture and
contaminants. This keeps them from going
into log set controls. If sediment trap is not
installed or is installed incorrectly, log set may
not run properly.
Approved Flexible Gas Hose
(if allowed by local codes)
CSA Design - Certified
Equipment Shutoff Valve
with 1/8" NPT Tap*
3" Minimum
* Purchase the optional
CSA design-certified
equipment shutoff valve
from dealer. See Acces-
sories page 13.
** Minimum inlet pres-
sure for purpose of input
adjustment.
Figure 5 - Gas Connection
Gas
Connector
Tube
Adapter Fitting
From Gas Meter
(5" W. C.**
to 10.5" W. C.)
pressure
Cap Pipe Tee
Nipple Joint
Sediment Trap
200549-06B