www.desatech.com
123551-01D
14
CAUTION: Use only 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 heater. If
pipe is too small, undue loss of
volume will occur.
Installation must include a equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see
Figure 13).
IMPORTANT:
Install equipment shutoff valve
in an accessible location. The main gas valve
is for turning on or shutting off the gas to the
appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged heater valves.
INSTALLATION
Continued
Figure 12 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank
External
Regulator
With Vent
Pointing
Down
WARNING: For natural gas
units, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certified equipment
shutoff valve from your dealer. See
Acces-
sories
, page 30.
For propane/LP gas, the installer must supply
an external regulator. The external regulator
will reduce incoming gas pressure. You must
reduce incoming gas pressure to between 11"
and 14" of water. If you do not reduce incom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
12. Pointing the vent down protects it from
freezing rain or sleet.
* Minimum inlet pressure for purpose of input
adjustment.
Figure 13 - Gas Connection
Cap Pipe Tee
Nipple Joint
3" Min.
Sediment Trap
Gas
Regulator
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap
Approved Flexible
Gas Hose (if allowed
by local codes)
Natural
From Gas Meter
(5" W.C.* to 10.5" W.C.
Pressure)
Propane/LP
From
External Regulator
(11" W.C.** to
14" W.C.
Pressure
