Owner`s manual

GP-MSJW-CX-07B
STW-JZ / IW Manual
RD: Sept, 2005
RL: 7B
KH
11. FLUE VENTING
INDIRECT VENTED APPLICATION
DIRECT VENTED APPLICATION
A length of ‘C’ Vent is to be installed on the
swaged end of the last tube before any Tee or
Elbow is fitted. When the heater is installed and
indirectly vented, it is required in Canada that the
heater be electrically interlocked to an
independent exhaust fan by means of an Air
Proving Switch. The exhaust fan must be sized to
create 3CFM for every 1000 Btu/hr or fraction
thereof, of total input of installed equipment.
Consult CSA.B149.1-00 latest edition for
requirements.
In the USA when a heater is installed unvented
the system requires consideration of normal
infiltration and introduction of outside air by
natural or mechanical means, and/or electrically
interlocked to an independant exhaust fan.
Consult your local codes and ANSI Z223.1 latest
edition. for all venting requirements, and
practices.
A length of ‘C’ Vent is to be installed on the
swaged end of the last tube before any Tee or
Elbow is fitted. All venting must be single wall
"C" vent except that portion of vent passing
through a combustible wall or roof then type "B"
vent may be used as per CSA's interim
requirement. When venting horizontally, the flue
vent system must slope downwards approximately
1/4" per foot toward the vent terminal, starting at
the termination of the radiant tube. For horizontal
through the wall venting, the approved manufac-
turer 4" or 6" horizontal wall vent terminal (JA-
0528/9) should be used and mounted 18" from
the outside wall to the inside edge of terminal
opening to alleviate back pressure caused by tur-
bulent wind conditions (See Fig 17). This will
also ensure flue gases are directed away from the
structure to protect building materials from degra-
dation by the exhausted flue gases. It is the
responsibility of the installer to be familiar with
current local codes or ANSI Z223.1 / CSA.
B149.1-00 latest editions for all venting
requirements, and practices.
THIS STW-JZ / IW SERIES IS APPROVED FOR BOTH DIRECT AND INDIRECT VENTING
APPLICATIONS. THE SYSTEM MUST NOT BE OPERATED WITHIN A NEGATIVE AIR
CONDITION, UNLESS COMBUSTION AIR IS BROUGHT IN FROM OUTSIDE DIRECTLY TO
THE BURNER (COMBUSTION AIR IS A REQUIREMENT FOR CAR WA SH INSTALLATIONS).
I
F A SEVERE NEGATIVE PRESSURE IS EXPERIENCED OR ANTICIPATED, THE SECOND
PORT (BARB) ON THE BLOCKED FLUE SWITCH SHOULD BE CONNECTED DIRECTLY TO
OUTSIDE AIR USING 1/4” PLASTIC HOSE FROM BLOCKED FLUE SWITCH TO OUTSIDE OF
BUILDING (NOT SUPPLIED).
Page 16