Connecting To Gas Supply - Procom ML300HGA Owner's Operation And Installation Manual

CONNECTING TO GAS SUPPLY

WARNING: A qualified
service person must connect
heater to gas supply. Follow all
local codes.
WARNING: This appliance
"
requires a 3/8 NPT (National Pipe
T h r e a d ) i n l e t
to the pressure regulator.
CAUTION: Never connect
heater directly to the propane/LP
supply. This heater requires an
external regulator (not supplied).
Install the external regulator between
the heater and propane/LP supply.
The installer must
external regulator. The external
regulator will reduce incoming gas
p r e s s u r e . Yo u m u s t
incoming gas pressure to between
11 and 14 inches of water. If you
do not reduce incoming
pressure, heater regulator damage
c o u l d o c c u r . I n s t a l l
regulator with the vent
down as shown in Figure 13.
Pointing the vent down protects it
from freezing rain or sleet.
Figure 13 - External Regulator with
Vent Pointing Down
c o n n e c t i o n
supply an
r e d u c e
Figure 14 -Gas Connection
gas
*A CSA/AGA design-certified equipment shutoff valve with 1/8
an acceptable alternative to test gauge connection. Purchase the optional
e x t e r n a l
C S A / A G A
pointing
your dealer. See Accessories, page 17.
b l a c k i r o n
Internally-tinned copper tubing
may be used in certain areas.
Check your local codes. Use pipe
of large enough
allow proper gas volume to heater.
I f
undue loss of pressure will occur.
Typical Inlet Pipe Diameters
ML300HGA / ML300TGA 1/2
greater
Installation
equipment shutoff valve, union,
and plugged 1/8
NPT tap within reach for test gauge
hook
upstream from heater (see Figure
14).
IMPORTANT: Install an equipment
shutoff valve in an accessible
location. The equipment shutoff
valve is for turning on or shutting
off the gas to the appliance.
INSTALLATION
d e s i g n - c e r t i f i e d
CAUTION: Use only new,
o r s t e e l
diameter to
p i p e i s t o o s m a l l ,
must include an
"
NPT tap. Locate
up. NPT tap must be
9
e q u i p m e n t s h u t o f f
Apply pipe joint sealant lightly to
male threads. This will prevent
p i p e .
excess sealant from going into
pipe. Excess sealant in pipe could
result in clogged heater valves.
CAUTION: Use pipe joint
sealant that is resistant to
liquid petroleum (LP) gas.
Install sediment trap in supply line
as shown in Figure 14. Locate
"
or
sediment trap where it is within
r e a c h f o r
sediment
matter is not likely to freeze. A
sediment trap traps moisture and
contaminants. This
from going into heater controls. If
sediment trap is not installed or is
installed wrong,
not run properly.
IMPORTANT:
regulator
connecting it to gas piping and/or
fittings.
"
NPT tap is
v a l v e f r o m
c l e a n i n g . L o c a t e
trap where trapped
keeps them
heater may
Hold pressure
with wrench when