Schwank STSp-CANADA User Manual

Page 19

SP-MSTP-AC-15A

STS-p Manual

RD: DEC, 2003

RL:15

Page 15

11. FLUE VENTING

The STSp series is approved for both
direct and indirect vented applications.

INDIRECT VENTED APPLICATION

DIRECT VENTED APPLICATION

NOTE:

When the heater is installed and indirectly
vented, it is required in Canada that the
heater be electrically interlocked to an inde-
pendent 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 in-
stalled equipment. Consult CSA.B149.1-00
latest edition for requirements.

In the USA when a heater is installed un-
vented the system requires consideration of
normal infiltration and introduction of out-
side air by natural or mechanical means,
and /or electrically interlocked to an inde-
pendant exhaust fan. Consult your local
codes and ANSI Z223.1 latest edition. to
determine the specific requirements.

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 require-
ment. When venting horizontally, the flue
vent system must slope downwards approxi-
mately 1/4" per foot toward the vent terminal,
starting at the termination of the radiant tube.
For horizontal through the wall venting, the
approved Schwank 4" or 6" vent terminal

should be used. Install the flue vent terminal
18" from the outside wall to the inside end of
terminal opening. The flue vent terminal used
must be of the approved type supplied by
Schwank or supplied by an approved "B"
vent manufacturer. It is the responsibility of
the installer to be familiar and current with
local codes or ANSI Z223.1 / CSA.B149.1-
00 latest editions for all venting require-
ments, and practices.

The system must not be operated in a
negative air condition, unless combustion
air is brought in from outside directly to
the burner. If a severe negative pressure is
experienced or anticipated, order heater
requesting custom Air Switch c/w Air Hose
from Schwank.
* Ensuring you specify the correct heater
model number when ordering.