Procom ML150HPA Owner's Operation And Installation Manual page 9

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 Thread) inlet connection
to the pressure regulator.
CAUTION: Never connect
h e a t e r d i r e c t l y
propane/LP supply. This heater
requires an external regulator
( n ot s u p p l ie d ) . In s ta l l
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 inc oming
pressure, heater regulator damage
c ou l d oc c ur . In s t a ll
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
:
WARING Do not over tighten gas
connections.
INSTALLATION
t o t h e
t h e
supply an
r e d u c e
Figure 14 -Gas Connection
*A CSA/AGA design-certified equipment shutoff valve with 1/8
gas
an acceptable alternative to test gauge connection. Purchase the optional
C S A / A G A
e x te r na l
your dealer. See Accessories, page 17.
pointing
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in
certain areas. Check your local
codes. Use pipe of large enough
diameter to allow proper gas volume
to heater. If pipe is too small,
undue loss of pressure will occur.
Typical Inlet Pipe Diameters
All models up to 20,000 BTU's use
3/8'' or greater pipe;
All models 25,000 BTU's and higher,
use 1/2" or greater pipe.
Installation
equipment
and plugged 1/8
NPT tap within reach for test gauge
hook up.
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.
r
d e s i g n - c e r t i f i e d e q u i p m e n t
must include an
shutoff valve, union,
"
NPT tap. Locate
NPT tap must be
9
"
s h u t o ff v a l v e
Apply pipe joint sealant lightly to
male threads. This will prevent
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
sediment trap where it is within
re ac h fo r cl ean in g.
sediment trap where
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
inst alle d w rong, hea ter
not run properly.
IMPORTANT: Hold
reg ulato r w ith w renc h
connecting it to gas piping and/or
fittings.
NPT tap is
f r o m
Lo ca te
trapped
keeps them
m ay
pressure
w hen