Schwank STSp-WP - Manual (Page 19)

SP-MSWP-BX-09A
STSp-WP Manual
RD: MAY 2004
RL: 9
KH
Page 15
The total maximum allowable length of vent
and combustion air duct is 80' for STSp-WP
200, 175, 155 and 130, and 50' for STSp-WP
110, 80 and 60. The total maximum allowable
vent and duct is reduced by ten feet for every
90
o vent elbow installed in the vent or duct.
Should the system be installed with a 90 or
180 degree elbow in the radiant tube, 10ft or
20ft respectively must be deducted from the
length of vent and duct. Neither the flue vent
nor the combustion air duct is to exceed 50ft in
length. Lengths greater than those allowed
may create condensation problems and will
void CSA design Certification. The horizontal
flue vent shall not terminate less than the
following distances: Canada and the USA
follow the same guidelines except where
indicated in brackets.
• Three feet above grade level, unless its location is
adjacent to public walkways, then it has to be not
less than seven feet.
• Directly below a soffit or over-hang.
• Directly above a gas utility meter or service
regulator.
• Uninsulated single-wall metal pipe shall not be
used outdoors in cold climates for venting gas
utilization equipment.
• Twelve inches from the combustion air inlet of any
heater with input up to 100,000 Btu/hr. (Canada )
• Three feet from combustion air inlet of any heater
over 100,000 Btu/hr. (Canada)
• Within six feet of a mechanical air supply
inlet to any building. (Canada)
• Shall terminate three feet above any forced air inlet
within ten feet. (USA)
• Shall terminate at least four feet below or one foot
above any door window or gravity air inlet into any
building. (USA)
• Twelve inches from sides and bottom and eight-
een inches from top when installed close to the
corner of a building.
The previous references to Gas codes and
practices are meant to be a guide only to the
authoritive ANSI Z223.1 / CSA B149.1-00
latest edition current Gas Codes for the USA
and Canada respectively. The references in
this manual are not a fully comprehensive list
of the current Gas Codes and practices and
should not be used solely as such. They are to
guide the installer as a reference point to the
ANSI Z223.1/ CSA B149.1-00 Naturasl Gas
and Propane Installation Codes (latest
edition) It is the responsibility of the installer
to be acquainted with and to consult all
relevant codes, practices and local
requirements before installing the equipment.
Two heaters may be vented through an
approved common 4" X 4" X 6" flue Tee,
supplied by Schwank Ltd., as an option. The
two heaters must be controlled by one
common thermostat or "ON/OFF" switch.
All vent pipe used with a slip-fit connection
must be mechanically secured. Where the
vent pipe passes through areas where the
ambient temperature is likely to produce
condensation of the flue gases, the vent pipe
shall be insulated with a suitable material as
approved and specified by the insulation
manufacturer. Check with Schwank Tech
Support as to the maximum vent temperature
requirements. The vent system must always
be adequately supported to prevent sagging.
FLUE VENT TERMINAL