12
108382
UNVENTED GAS LOG HEATER
FLAME-MAX
®
For more information, visit www.desatech.com
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
CHECKING GAS
CONNECTIONS
INSTALLATION
Continued
* Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See
Accessories, page 24.
** Minimum inlet pressure for purpose of input adjustment.
Figure 14 - Gas Connection
Gas Control
3" Minimum
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if
allowed by local
codes)
Tee
Joint
Pipe
Nipple
Cap
Sediment
Trap
From Gas Meter for
natural gas (5" W.C.** to
10.5" W.C. Pressure)
From External Regulator
for propane/LP gas (11"
W.C.** to 14" W.C.
Pressure)
ON
POSITION
OFF
POSITION
Figure 15 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
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 equip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2 psig
will damage heater regulator.
2. Cap off open end of gas pipe where
equipment shutoff valve was con-
nected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas, or opening main gas valve
located on or near gas meter for natural
gas, or using compressed air.
4. Check all joints of gas supply piping
system. Apply a noncorrosive leak de-
tection fluid to gas joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Fig-
ure 15).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas, or opening main gas valve
located on or near gas meter for natural
gas, or using compressed air.
3. Check all joints from propane/LP sup-
ply tank to equipment shutoff valve (see
Figure 15). Apply a noncorrosive leak
detection fluid to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
WARNING: Never use an open
flame to check for a leak. Apply a
noncorrosive leak detection fluid
to all joints. Bubbles forming show
a leak. Correct all leaks at once.
CAUTION: For propane/LP
gas, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under
Connect-
ing to Gas Supply
, page 11.
We recommend that you install sediment
trap in supply line as shown in Figure 14.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate sedi-
ment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
CAUTION: Avoid damage to
control. Hold fitting with wrench
when connecting it to gas piping
and/or fittings.
