Flue Venting - Schwank STS-JZ Installation & Owner's Manual

9. FLUE VENTING - RADIANT TUBE HEATER
IMPORTANT
Vertical Vent Through Roof (Category I): For vertical vent, this tube heater series operates
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with a negative static vent pressure and a vent temperature that does not result in excessive con-
densate in the vent and is defined as a Category I appliance. Refer to details below.
Horizontal Vent Through Wall (Category III): For horizontal vent, this tube heater series oper-
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ates with a positive static vent pressure and a vent temperature that does not result in excessive
condensate in the vent and is considered a Category III appliance. Refer to details below.
WARNING
vent connections with high temperature sealant. Venting must be in accordance with all local, state,
provincial, and national codes (ANSI Z223.1/NFPA 54 in USA; B149.1 in Canada) and as indicated
below in this manual.
This tube heater is certified for venting directly to the outside or unvented
(indirect venting) applications.
UNVENTED (INDIRECT MECHANICAL VENTING SYSTEM)
USA: Natural or mechanical means shall be provided to supply and exhaust at least 4ft
min/1000Btuh (0.38m
trical interlock to a dedicated exhaust fan. Exhaust must be located as high as practicable in the
structure above the level of the heater(s). Consult your local code and ANSI Z223.1 latest edition
for all venting requirements and practices.
Canada: It is required that the heater(s) be electrically interlocked to dedicated exhaust fan(s) by
means of an Air Proving Switch. Exhaust fan(s) must be sized to create 300 cfm (8.5 cu m/min)
exhaust for every 100,000 Btuh (30 kW) or any fraction thereof of total input of installed equip-
ment. Exhaust must be located as high as practicable in the structure above the level of the heat-
er(s). Sufficient supply air must be provided. Consult the latest edition of CSA.B149.1 Section 8
for venting system and air supply requirements.
VENTED TO THE OUTSIDE - GENERAL REQUIREMENTS
It is the responsibility of the installer to adhere to these instructions and all current local codes and/or
ANSI Z223.1 (NFPA 54) or CSA.B149.1 latest editions for all venting requirements, and practices.
All vent pipe will be certified to meet Category I (vertical vent) or Category III (horizontal vent) appli-
ance requirements, depending on the vent configuration of a particular installation.
It is a normal condition that during heat-up and cool-down a tube heater will expand and contract.
Allowances for heater expansion must be made in the venting and combustion air ducting. Improper
installation can result in property damage, injury or death.
When vented: The system must not be operated in a negative air condition unless combustion
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air is ducted from outside to the burner. If negative pressure is experienced or anticipated, the
open port (barb) on each of the blocked flue and proving air switches must be Tee'd together
and connected directly to outside air using a field supplied 1/4" plastic hose from the tee be-
tween the switches to outside of building.
All approved vent pipe, connectors, and adapters are supplied locally by others according to
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Effective January 1, 2019: Changes to the ANSI/CSA standard that gov-
erns Radiant Tube Heaters specify the following appliance CATEGORIES
and VENTING:
Inadequate venting of a heater may result in asphyxiation, carbon monoxide
poisoning, injury or death. This heater may use a vent connection or indirect
venting system to remove products of combustion from the space. Seal all
3
/min/kW) input of installed heaters. Some local codes may require an elec-
15
3
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STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C