Desa GL36STEP - Manual (Page 9)

www.desatech.com 55173-F 9
FIREPLACE
INSTALLATION
Continued
GAS SUPPLY TESTING
Note: This section is intended as a guide for quali-
fied technicians installing gas to this appliance.
CAUTION: Do not connect
appliance before pressure test-
ing gas piping. Damage to gas
valve may result and an unsafe
condition may be caused.
The appliance and its individual shut-off valve
must be disconnected from the gas supply piping
system during any pressure testing of that system at
test pressures in excess of 1/2 psig (3.5 kPa).
The appliance must be isolated from the gas sup-
ply piping system by closing its individual manual
shut-off valve during any pressure testing of the
gas supply piping system at test pressures equal
to or less than 1/2 psig (3.5 kPa).
This unit has been tested for installation at high
altitude in accordance with Canadian test stan-
dard CAN/CGA-2.17. Higher altitudes affect the
atmospheric pressure and heat valve of gaseous
fuels. When installing this unit at high altitudes,
the rated input will be lower than at sea level. The
lowered oxygen content in the air and the lowered
gas density require installation of a different size
orifice in order to achieve clean combustion of
the unit. Consult the unit data plate for the proper
high-altitude orifice size. Fill out the information
sticker attached to the unit when field converting.
See Specifications, page 15, when derating.
The gas control valve is secured to the burner pan
assembly underneath the front ledge. A 1/8" NPT
plugged tapping is provided on the gas control
valve for a test gauge connection immediately
upstream of the gas supply connection to the ap-
pliance (see Figures 13 and 14).
Figure 12 - Wiring Through Outer Surround
Figure 13 - Millivolt Control Valve
Figure 14 - Electronic Control Valve
ON/OFF
Knob
Pilot
Adjustment
Cap
Pilot Gas Line
Do Not Kink
Inlet
Pressure Outlet
Pressure
To Main
Burner
To Pilot
Burner
E A
From
Gas
Supply
To
Main
Burner
Inlet
Pressure
Outlet
Pressure
GAS LINE HOOK-UP
WARNING: Gas line hookup
should be done by your gas
supplier or a qualified service
person.
WARNING: Before you pro-
ceed, make sure your gas supply
is OFF.
A manual shutoff valve has been included in the
applianceʼs gas supply system. You may consider
installing an extra gas shutoff valve outside the ap-
plianceʼs enclosure (check with local codes) where
it can be accessed more conveniently with a key
through a wall as shown in Figure 15, page 10.
A 30" long, 1/2" NPT SCHD 40 flexible gas line
(supplied) may be used between the incoming 1/2"
NPT black iron gas line and the fireplace regulator
(located inside the firebox, under the access plate).
The incoming gas line may be routed toward the
appliance from either the left or right hand side of
fireplace outer surround.
Common
Ground Wire
Strain Relief
Grommet