9
INSTALLATION
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.
WARNING: Never connect
heater private (non-utility) gas well.
T h i s g a s i s c o m m o n l y
known as well-head gas.
IMPORTANT: Check your gas line
pressure before connecting heater
to gas line. Gas line pressure must
be no greater than 10.5 inches of
water. If gas line pressure is
higher, heater regulator damage
could occur.
CAUTION: Use only new,
b l a c k i r o n o r s t e e l p i p e .
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.
I f p i p e i s t o o s m a l l ,
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.
*A CSA/AGA design-certified equipment shutoff valve with 1/8
"
NPT tap is
an acceptable alternative to test gauge connection. Purchase the optional
C S A / A G A d e s i g n - c e r t i f i e d e q u i p m e n t s h u t o f f v a l v e f r o m
your dealer. See Accessories, page 16.
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.
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.
Install sediment trap in supply line
as shown in Figure 12. Locate
sediment trap where it is within
r e a c h f o r c l e a n i n g . L o c a t e
sediment 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
i n s t a l l e d w r o n g , h e a t e r m a y
not run properly.
IMPORTANT
: Hold pressure
r e g u l a t o r w i t h w r e n c h w h e n
connecting it to gas piping and/or
fittings.
CAUTION: Use pipe joint
sealant that is resistant to
natural gas.
Figure 12 -Gas Connection
Installation must include an equip-
ment shutoff valve, union, and
plugged 1/8
"
NPT tap. Locate NPT
tap within reach for test gauge hook
up. NPT tap must be upstream
f r o m h e a t e r ( s e e F i g u r e 1 2 ) .