HearthStone Quality Home Heating Products Inc
STOWE Gas-Fired Direct Vent heater
25
F
IGURE
8
G
AS
S
UPPLY
&
C
ONNECTIONS
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NOTICE:
A qualified technician
must connect the heater to the gas
supply and leak test the unit before it
is approved for use. Consult all codes.
¦
WARNING:
The unit must be
installed and connected in accordance
with local codes, or in the absence of
local codes, with the most
current
edition of the National Fuel Gas Code
ANSI Z223.1 (NFPA 54) or CAN/CGA
B149 Installation Code.
The gas supply line connection is made to
the Stowe’s gas control valve under the unit
on the left side using a 3/8” male NPT
fitting. Only use pipe ½” or greater diameter
to allow full gas volume to heater maximum
demand of the unit, without undue loss of
pressure. Excessive pressure loss will occur
if the pipe is too small. We recommend
using new black iron or steel pipe only, with
a flexible line to the valve and to ease thread
alignment, but refer to local codes.
Internally tinned copper tubing can be used
in some areas when permitted by local
codes.
The gas supply line must include a manual
shut-off valve and union so the unit can be
disconnected for servicing. Also a sediment
trap and a 1/8” N.P.T. plugged tapping must
be installed upstream of the heater. The
sediment trap is installed to prevent moisture
and contaminants from passing through the
pipe to the heater controls and burners.
Failure to install a sediment trap could
prevent the heater from operating reliably.
The 1/8” N.P.T. plugged tapping is installed
for the test gauge connection (immediately
upstream of the gas supply connection).
Damage to the valve caused by lack of a
sediment trap will not be covered by the
warranty.
¦
CAUTION
: Check Gas Type!
The gas supply must be the same as stated
on the heater’s rating plate (located on the
unit). If the gas supply is different,
DO
NOT INSTALL
the heater. Contact your
