Desa VMH10TNC - Manual (Page 19)

www.desatech.com 112462-01B 19
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CONNECTING FIREPLACE TO GAS
SUPPLY
Installation Items Needed
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not provided)
NOTICE: Most building codes
do not permit concealed gas
connections. A flexible gas line
is provided to allow accessibil-
ity from the fireplace (see Fig-
ure 1, page 5). The flexible gas
supply line connection to the
equipment shutoff valve should
be accessible.
1. Route flexible gas line, included, from fire-
place control to equipment shutoff valve
through side or rear access holes in outer cas-
ing (see Figure 1, page 5).
2. Apply pipe joint sealant lightly to male threads
of gas connector attached to flexible gas line/
equipment shutoff valve (see Figure 23).
CAUTION: Avoid damage to
regulator. Hold gas regulator with
wrench when connecting it to
gas piping and/or fittings (Ther-
mostat-Controlled Models Only).
CAUTION: Avoid damage to
gas control. Hold gas control
with wrench when connecting it
to gas piping and/or fittings (Re-
mote-Ready Models Only).
3. Check all gas connections for leaks. See
Checking Gas Connections.
4. Feed flexible gas line into fireplace base area
while replacing branch support. Make sure the
entire flexible gas line is in fireplace base area.
INSTALLATION
Continued
Figure 23 - Attaching Flexible Gas Line
to Equipment Shutoff Valve
Flexible Gas Line
from Fireplace Gas
Regulator Provided
With Fireplace
To Gas Regulator
(Thermostat-Controlled
Models) or Control Valve
(Remote-Ready Models)
Equipment
Shutoff Valve
PROPANE/LP
To External
Regulator
NATURAL
To Gas Supply
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak de-
tection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and fireplace. See guidelines
under Connecting to Gas Sup-
ply
, page 17.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance main gas
valve (control valve) and equipment shutoff valve
from gas supply piping system. Pressures in ex-
cess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.