Schwank STS-JZ Operating instructions

STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
INSTALLATION / OWNER’S MANUAL
SAFETY ALERT:
This heater must be installed and serviced only by a trained gas service techni-
cian. Failure to comply could result in personal injury, death, fire and/or property
damage.
Do not store or use gasoline or other flammable vapours and liquids in the
vicinity of this or any other gas fired appliance.
IF YOU SMELL GAS:
◼ Extinguish any open flame
◼ Do not attempt to light this or any other appliance
◼ Don’t touch any electrical switch, or telephone
◼ Immediately call your gas supplier from a neighbor’s phone
◼ Follow any and all instruction from your gas supplier
◼ If your gas supplier is not available, call the fire department
Keep this manual in a secure place .
Record for future reference:
Model #:
Serial #:
(located on heater rating label)

STS-JZ
LOW INTENSITY TUBE TYPE
INFRA RED HEATERS
& 
IQ
LOW INTENSITY TUBE TYPE
INFRA RED HEATERS
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, injury or death.
Read the installation and operating and maintenance instructions thoroughly
before installing or servicing this equipment.

THESE HEATER SERIES ARE APPROVED TO ANSI Z83.20-2016/CSA 2.34-2016

2
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
NOTICE:
This manual is current for this product. Occasional revision of the product Certification Stand-
ard may require changes to the product and/or this manual.
This publication, or parts thereof, may not be reproduced in any form, without prior written
consent from The Manufacturer. Unauthorized use or distribution of this publication is strictly
prohibited.
-Schwank and InfraSave
5285 Bradco Boulevard
Mississauga, Ontario,L4W 2A6
PO Box 988, 2 Schwank Way
Waynesboro, Georgia 30830

Phone: [phone]
Fax: [phone]
e-mail: [e-mail]



3
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

 ........ 
IMPORTANT INFORMATION - READ FIRST
 ............................................. 4
........................... 5, 22
............................... 5, 23
 ................................................ 5, 15
‘’.................................... 5
....... 5
‘’.............................................. 6
 ........... 6
Clearances Figure & Table........................ 7
......................... 8
1. LABOR REQUIREMENTS............................... 9
2. INSTALLATION: AIRCRAFT HANGARS ........ 9
3. INSTALLATION: COMMERCIAL GARAGE ... 9
4. INSTALLATION: NOT SPACE HEATING ....... 9
5. PRE-INSTALLATION SURVEY…………….....10
6. MOUNTING CLEARANCES …………………..11
SERVICE CLEARANCE …………………...11
7. HEATER PLACEMENT GUIDELINES………...12
8. TURBULATOR LENGTH & LOCATION……….13
TURBULATOR ILLUSTRATION……………….14
9. FLUE VENTING ……………………………..15
MIN./MAX. SYSTEM LENGTHS .…………….16
HEATER EXPANSION & VENT CONFIG. ….17
COMMON VENTING ……………………….....17
VERTICAL VENTING CATEGORY I ………...18
HORIZONTAL VENTING CATEGORY III …..19
10. COMBUSTION AIR DUCT ……………………21
11. GAS SUPPLY / HEATER EXPANSION ...........22
FLEXIBLE GAS CONNECTION ...............23 - 24
12. ELECTRICAL AND THERMOSTAT ................ 25
13. HIGH ALTITUDE INSTALLATION ................... 25
14. LIGHTING INSTRUCTIONS ...........................25
15. RECOMMENDED MAINTENANCE............... ..25
……...
16. SUSPENDING THE SYSTEM - General ….. 26
17. SYSTEMS WITH 90° & 180° ELBOWS... 29-32
ELBOW KIT DIMENSIONS ...………..29, 58
18. BURNER & TUBE INSTALLATION............... 33
SPECIAL COUPLING -100,175 & 200 Mbh ..36, 37
19. REFLECTOR INSTALLATION ...................... 38
20. SEISMIC RESTRAINT .................................. 40
20-A. WIND RESTRAINT.................................... 40
21. WIRING DIAGRAM: FENWAL DSI................. 41
21-A. WIRING DIAGRAM MULTIPLE HEATERS
PER THERMOSTAT .................................... 42
22. SEQUENCE OF OPERATION: FENWAL DSI..... 43
SPARK IGNITER SET UP .............................. 45
23. TROUBLESHOOTING GUIDE: FENWAL DSI ..... 46
24. TROUBLESHOOTING GUIDE: HEATER ............ 47
25. START– UP / COMMISSIONING SHEET ...... 49
WARRANTY STATEMENT................... BACK PAGE

26. HEATER DIMENSIONS / WEIGHTS ………52
INSTALLATION DIMENSIONS ………. ..53
27. BURNER / TUBE KIT ASSEMBLY CHART.....54
28. HIGH ALTITUDE & ORIFICE CHART …..55 - 56
30. OPTIONAL ACCESSORIES ..................... 57 - 60
31. BURNER PARTS LIST ............................ 61 - 63
32. TUBE SYSTEM PARTS LIST .......................... 64
-



4
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

A gas-fired radiant tube heater may be installed for heating of commercial / industrial non-
residential spaces. It is beyond the scope of these instructions to consider all conditions that
may be encountered. Installation must conform with local building codes or, in the absence of
local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the U.S.A. or the Natu-
ral Gas and Propane Installation Code, CSA B149.1 in Canada. The latest edition Electrical
Code ANSI/NFPA N0 70 in the U.S.A. and PART 1 CSA C22.1 in Canada must also be ob-
served.
Installation of a gas fired tube heater must conform to all heating installation design procedures
including clearance to combustibles, connection to the gas and electrical supplies, and ventila-
tion.
This heater is not for installation in a Class 1 or Class 2 explosive environment, nor a resi-
dence. If installation of this equipment is in question, consult with local authorities having juris-
diction (Fire Marshall, labor department, insurance underwriter, or others).
Revisions to codes and/or standards, may require revision to equipment and installation proce-
dures. In case of discrepancy, the latest codes, standards, and installation manual will take pri-
ority over prior releases.
-andmay be installed for heating of commercial / industrial non-residential


Models SPW-JZ and IWP have a powder coated water resistant burner enclosure
and may be installed for heating of commercial / industrial non-residential outdoor
spaces and wet indoor environments.
Models STW-JZ and IW have a stainless steel water resistant burner enclosure and
may be installed for heating of commercial / industrial non-residential outdoor spac-
es and harsh wet indoor environments.
Improper installation, adjustment, alteration, service or mainte-
nance can cause property damage, injury or death. Read and
understand this installation and operation manual thoroughly prior to assembly,
installation, operation or service to this appliance.
This heater must be installed and serviced only by a trained gas service techni-
cian.
Do not store or use gasoline or other flammable vapours and liquids in the vicinity
of this or any other gas fired appliance.
Failure to comply could result in personal injury, death, fire and/or property dam-
age.
Do not store or use gasoline or other flammable vapours and liquids in the vicinity
of this or any other gas fired appliance.
This appliance may have sharp edges and corners. Wear protective clothing such
as gloves and protective eye wear when servicing this or any other appliance.
WARNING
California Proposition 65:
: This product can expose you to chemicals including carbon monoxide, which
is known to the State of California to cause birth defects or other reproductive harm. For more
information, go to www.P65Warnings.ca.gov

5
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

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 gas connection, venting and combustion air
ducting. Improper installation, alteration, or adjustment can result in
property damage, injury or death. 


Inadequate venting of a heater may result in asphyxiation, carbon
monoxide poisoning, injury or death. This heater may be directly or
indirectly vented from the space. 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 in this manual.

Improper installation, connection, or adjustment can result in property
damage, toxic gases, asphyxiation, injury or death. Using an ap-
proved flexible gas connector in the USA or Type 1 hose connector
in Canada, the gas supply to the heater must be connected and test-
ed in accordance with all local, state, provincial, and national codes (ANSI Z223.1/NFPA 54 in
USA; B149.1 in Canada) and as indicated in this manual. 

 -‘’ 
During start up, the heating of material coatings used in the production process of tubes and
reflectors will create smoke during the initial period of operation. This condition is normal and
temporary .
Ensure that there is sufficient ventilation to adequately clear any smoke from the space.
Notify site and safety personnel to ensure that alarm systems are not unduly activated.
 
Infrared radiant (IR) heating system provide comfort with the effect of radiant heat and ambient
air heat.
If your IR system is controlled with a thermostat (TruTemp or ThermoControl Plus) that senses
radiant heat, then set the thermostat to the desired comfort temperature (ie: 65°; 68°; 20°C).
If your IR system is controlled with a standard 24V or 120V thermostat that senses only air tem-
perature, then start with a thermostat setting that is 5° to 7°F (3° to 5°C) lower than the desired
comfort temperature. Some trial and error setting may be required to ‘fine tune’ the comfort tem-
perature that best suits your site and provides most economical operation.


6
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

Location of flammable or explosive objects, liquids or vapors close to the heater may cause fire
or explosion and result in property damage, injury or death. Do not use, store or locate flamma-
ble or explosive objects, liquids or vapors in proximity of the heater.




’
         


In locations used for the storage of combustible materials, signs must be posted to specify the
maximum permissible stacking height to maintain the required clearances from the heater to
the combustibles. Such signs must either be posted adjacent to the heater thermostats or in
the absence of such thermostats in a conspicuous location. In addition to stored or stationary
material, consideration must also be given to moveable objects such as cranes, vehicles, and
overhead doors, and structural objects such as sprinkler heads, electrical and gas lines, and
electrical fixtures.
It is beyond the scope of these instructions to consider all conditions that may be encountered.
Consult local authorities such as the Fire Marshall, insurance carrier, or safety authorities if you
are uncertain as to the safety or applicability of the proposed installation.

.
WARNING
WARNING “”
It is a normal condition that the combustion tube (1st tube) can appear to “glow red”. For inputs
up to 150,000 Btuh, the top surface of the tube can appear red where heat is trapped between
the reflector and the tube. The stainless steel tube used for inputs 175,000 and greater can ap-
pear to entirely glow red. The tube material is designed into the heater because it can with-
stand the high temperature of combustion, and the “red glow” is a normal occurrence.

7
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

-refer to Table 1 for values
*The clearance to combustible materials represents the minimum distance that must be main-
tained between the heater and a nearby surface. 
.
‘’ USE AN INDELIBLE MARKER TO
ENTER VALUES ‘H’, ‘S’, ‘F’, & ‘B’ ON .
POST THE SIGN ADJACENT TO THE HEATER THERMOSTAT OR IN A
PROMINENT LOCATION. See next page for details.






Suspended at an
angle up to 45°
Suspended
horizontally

FLOOR



Maximum Stack
Height
 = T- C
‘T’ is measured
on site, ‘C’ is in
Table 1
FLOOR

Maximum Stack
Height
 = T- C
‘T’ is measured
on site, ‘C’ is in
Table 1






inches (cm)

inches (cm)

inches (cm)

inches (cm)

inches (cm)

inches (cm)

inches (cm)
STS-JZ / IQ 200 (33)  (15.2) (188)  (178) (36) (112)  (193)
STS-JZ / IQ 175 (31)  (15.2) (183)  (172) (33) (107)  (188)
STS-JZ / IQ 155 (14)  (2.5) (163) (163) (9) (48) (178)
STS-JZ / IQ 130 (11)  (2.5) (152) (152) (9) (28) (165)
STS-JZ / IQ 110 (9)  (2.5) (137) (137) (5) (25) (137)
STS-JZ / IQ 100 (16.5)  (2.5) (145) (172) (15) (56) (172)
STS-JZ / IQ 80  (8)  (2.5) (59) (97) (5) (15) (97)
STS-JZ / IQ 60 (6)  (2.5) (43) (86) (4) (14) (86)
STS-JZ / IQ 45 (7)  (2.5) (61) (81) (6) (18) (81)

8
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
VENT END CLEARANCE: Clearances from the vent pipe are determined by local or national
installation codes, but must not be less than 6 inches (15 cm).
For ‘unvented’ installation, a minimum distance of 48 inches (122 cm) is required from the end
of heater to a combustible surface.

 specifying the maximum permissible stacking height to
maintain the required clearances from the heater to the combustibles.
The signs must be posted either adjacent to the IR heating system thermostats or in the ab-
sence of such thermostats, in a conspicuous place.
“” 



To calculate the value ‘’: ( =  - )
• Measure the on site distance between bottom of
the heater and the floor = ‘’ inches (cm).
• Refer to Table 1 to get the value ‘’ that corre-
sponds to the model you are installing
• Subtract the clearance below the heater ‘’ from
‘’ to get value ‘’.
• Enter this value ‘’ on the sign.
Refer to the information for the heater model
being installed in Figure 1 and Table 1 to get
the values for dimensions ‘’, ‘’ and ‘’.
WARNING
Post this sign as instructed above.
 that in the above table the .
’




9
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
 
Low intensity radiant tube heaters are suitable for use in aircraft hangars when installed in ac-
cordance with the latest edition of the Standard for Aircraft Hangars, ANSI/NFPA No 409 in the
USA, or the Canadian Natural Gas and Propane Installation Code, B149.1.
A. A minimum clearance of 10 ft (3 m) above either the highest fuel storage compartment or
the highest engine enclosure of the highest aircraft which may occupy the hangar. The
clearance to the bottom of the heater shall be measured from the upper surface of either
the fuel storage compartment or the engine enclosure, whichever is higher from the floor.
B. A minimum clearance of 8 ft (2.4 m) must be maintained from the bottom of the heater to
the floor in other sections of the aircraft hangar, such as offices and shops, which communi-
cate with areas for servicing or storage. Refer to Table 1 for proper mounting clearances to
combustibles.
C. Heaters must be located so as to be protected from damage by aircraft and other objects,
such as cranes and movable scaffolding.
D. Heaters must be located so as to be accessible for servicing and adjustment.
 
Two persons are required to safely install this equipment. Wear gloves and other required safe-
ty protection.

Low Intensity Heaters are suitable for use in commercial garages when installed in accordance
with the latest edition of the Standard for Parking Structures, ANSI/NFPA 88A, or the Standard
for Repair Garages, ANSI/NFPA No. 88B, or the Canadian Natural Gas and Propane Installa-
tion Code, B149.1.
An overhead heater shall be located high enough to maintain the mini-
mum distance to combustibles, as shown on the heater rating plate, from
the heater to any vehicles parked below the heater.
Overhead heaters shall be installed at least 8 ft (2.4 m) above the floor.
 
Use for process or other applications that are not space heating will void the C.S.A. certification
and product warranty. Process application requires field inspection and/or certification by local
authorities having jurisdiction.
WARNING

10
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause
property damage, injury or death. Read and understand this installation and
operation manual thoroughly prior to assembly, installation, operation or service to
this appliance.
This heater must be installed and serviced only by a trained gas service technician.
Do not store or use gasoline or other flammable vapours and liquids in the vicinity
of this or any other gas fired appliance.
Failure to comply could result in personal injury, death, fire and/or property damage.
Do not store or use gasoline or other flammable vapours and liquids in the vicinity
of this or any other gas fired appliance.
 
It is recommended that a full heating design including heat loss calculation be conducted on
the structure or area to be heated. Heater sizing and placement must consider available
mounting height, sources of greatest heat loss, and the certified clearances to combustibles
with respect to stored material, moveable objects (cranes, vehicles, lifts, overhead doors, etc),
sprinkler system heads, and other obstructions on the site. Consideration must also be given to
vent / duct placement and the allowable combined lengths of vent and duct. Carefully survey
the area to be heated, and for best results place burner and combustion chamber in the coldest
area(s) .
Installation must conform with all local, state, provincial and national code requirements includ-
ing the current latest edition ANSI Z223.1 (NFPA 54) in the U.S.A. and B149.1 installation
code in Canada, for gas burning appliances and equipment. The latest edition Electrical Code
ANSI/NFPA N0 70 in the U.S.A. and PART 1 CSA C22.1 in Canada must also be observed.
The heating system must have gas piping of the correct diameter, length, and arrangement to
function properly. For this reason, a layout drawing is necessary.

11
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
 
This heater must be mounted with at least the minimum clearances between the heater and
combustibles as shown in FIG-1, TABLE 1, Page 7. It is the installer’s responsibility to ensure
that building materials with a low heat tolerance which may degrade at lower temperatures are
protected to prevent degradation. Examples of low heat tolerance materials include vinyl sid-
ing, fabrics, some plastics, filmy materials, etc.
Positioning of lights, sprinkler heads, overhead doors, storage areas, gas and electrical lines,
parked vehicles, cranes and any other possible obstruction or hazard must be evaluated prior
to installation.


   : The lower ‘jaw’ of the burner cabinet swings down to provide
convenient service access to burner components. Provide a minimum clearance from any wall
or obstruction of 6 inches (15 cm) to the access end of the burner housing, and a minimum of
24 inches (61 cm) to any ONE side to allow servicing of burner, blower and controls. (see Fig-
ure 2 below) - the minimum clearances to combustibles must always be maintained.
For guidelines to heater placement refer to TABLE 2 (next page).


12
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
: Single or multiple heater placement must be such that continu-
ous operation of heater(s) will not cause combustible material or materials in
storage to reach a temperature in excess of ambient temperature plus 90F°
(50C°).
’



“” 






(m)




(m)
 

“”

(m) 
STS-JZ / IQ 200 18  30 (6 - 8) (15) 17  25 (5 - 8)
COMBUSTIBLE
CLEARANCE
BEHIND
REFLECTOR -
or greater
(refer to Table 1)
STS-JZ / IQ 175 18  30 (6 - 8) (15) 17  25 (5 - 8)
STS-JZ / IQ 155 16  25 (5 - 7) (14) 15  20 (5 - 7)
STS-JZ / IQ 130 15  21 (5 - 7) (12) 15  20 (5 - 7)
STS-JZ / IQ 110 13  19 (4 - 6) (11) 13  18 (4 - 6)
STS-JZ / IQ 100 15  19 (5 - 6) (11) 13  18 (4 - 6)
STS-JZ / IQ 80 10  16 (3 - 5) (9) 12  16 (4 - 5)
STS-JZ / IQ 60 8  14 (2.5 - 5) (8) 11  15 (3.4 - 5)
STS-JZ / IQ 45 8  12 (2.5 - 4) (6) 8  12 (2.5 - 4)
* GUIDELINE MOUNTING HEIGHTS are typical to provide optimum comfort in general space
heating applications. Variance to these typical heights can occur in some applications:
• Higher mounting heights due to structure or application requirements
• Lower mounting heights: Area or ‘spot’ heat; locations with sufficient horizontal separa-
tion distance from personnel; areas with greater infiltration losses (near overhead doors,
etc)


(m)




(m)
 

“”

“” 
“-”
(m) 
STS-JZ / IQ 200 18  25 (6 - 8) (15) 17  25 (5 - 8)
COMBUSTIBLE
CLEARANCE
BEHIND
(refer to Table 1)
STS-JZ / IQ 175 18  25 (6 - 8) (15) 17  25 (5 - 8)
STS-JZ / IQ 155 16  21 (5 - 7) (14) 15  20 (5 - 7)
STS-JZ / IQ 130 15  21 (5 - 7) (12) 15  20 (5 - 7)
STS-JZ / IQ 110 13  19 (4 - 6) (11) 13  18 (4 - 6)
STS-JZ / IQ 100 13  19 (4 - 6) (11) 13  18 (4 - 6)
STS-JZ / IQ 80 10  16 (3 - 5) (9) 12  16 (4 - 5)
STS-JZ / IQ 60 8  14 (2.5 - 5) (8) 11  15 (3.4 - 5)
STS-JZ / IQ 45 8  12 (2.5 - 4) (6) 8  12 (2.5 - 4)


13
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

 Improper location of a turbulator can cause malfunction of the heater,
property damage, and will void the heater warranty.
Tubes with turbulators are clearly labeled for easy identification. Models with as-
terisk refer to notes below the table.
See next page for an illustration of turbulator length and location.
 
x Length (ft)


NG or Propane 45 x 20 39” + 96”
NG or Propane 60 x 20 39” + 96”
NG or Propane 60 x 30 96” 
NG or Propane 80 x 20 39” + 96”
NG or Propane 80 x 30 96” 
NG or Propane 80 x 40 24” + 109”
NG ONLY 100 x 20 Stamped S/S
NG or Propane 110 x 30 60” + 96”
NG or Propane 110 x 40 24” + 109”
NG or Propane 110 x 50 24” [3rd Tube]
NG ONLY 130 x 30 60” + 96”
NG or Propane 130 x 40 24” + 109”
NG or Propane 130 x 50 24” [3rd Tube]
NG or Propane 155 x 40 24” + 109”
NG or Propane 155 x 50 24” [3rd Tube]
NG or Propane 155 x 60 24” [3rd Tube]
NG or Propane 175 x 50/60 40” + 72” 
NG ONLY 175 x 70 40” + 72” 
NG ONLY 200 x 50 40” + 72”
NG or Propane 200 x 60/70  40” + 72” 
:
1.     30’: Remove 5 ft section of tur-
bulator from the aluminized steel tube
(2nd tube in system); install tube with 96”
turbulator at the vent end of the system
2.    60’: Install tube with tur-
bulators as   in the system
 60’ & 70’: Install tube with tur-
bulators as in the system
3.60’ & 70’: Remove 40” piece of tur-
bulator from the upstream end of tube
with turbulator, and install the tube with
turbulator as the in the system


14
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

 Improper location of a turbulator can cause malfunction of the heater,
property damage, and will void the heater warranty.
Tubes with turbulators are clearly labeled for easy identification. Models with as-
terisk refer to notes below the table.

15
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
 -


:
◼ : , this tube heater series operates
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.
◼ : , this tube heater series oper-
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.
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
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.



: Natural or mechanical means shall be provided to supply and exhaust at least 4ft/
min/1000Btuh (0.38m/min/kW) input of installed heaters. Some local codes may require an elec-
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.
: 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.
-
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
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



16
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
appliance Category, and specifications below.
◼ All venting must meet requirements of Local Codes or, in the absence of local codes, with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54; or the Natural Gas and Propane Installation
Code CSA B149.1.
◼ A vent connector shall comply with local codes and be firmly attached to the flue collar by 3 x
1/2” sheet metal screws. Seal penetrations and connections with high temperature RTV sili-
cone sealant.
◼ Install a minimum 12” [305 mm] straight vent connector before any Tee or 90° Elbow.
◼ The connection of vent components must be secured as specified in the installation instruc-
tions by the vent manufacturer.
◼ For vertical vent, any horizontal vent section will slope upwards away from the heater not less
than 1/4 inch rise per foot of run.
◼ For horizontal vent, slope downward away from heater a maximum of 1/4 inch down per foot of
run.
◼ When the vent pipe passes through a cold or unheated area where the ambient temperature is
likely to produce condensation of the flue gases, the vent pipe will be insulated with a suitable
material as certified and specified by the insulation manufacturer to withstand temperature up
to 460°F (238°C).
◼ The vent system must be adequately supported to prevent sagging.
◼ The vent configuration will allow for expansion and contraction in length of the tube heater.
◼ As an Option for vertical vent, two heaters may be vented through an approved common 4" x
4" x 6" Vent Tee (10 x 10 x 15 cm), supplied by the manufacturer, or by using approved com-
ponents as indicated in local codes. Vent pipe from each heater is not required to be equidis-
tant to the vent Tee, but must comply with local code requirements. A common thermostat or
“ON/OFF” switch must control commonly vented heaters.      

:
◼  .
Lengths in the table apply to either Vertical or Horizontal vent.
◼ Tube Heater length + combustion air duct + vent +
elbows. Each 90° elbow in the system has an equivalent length of 5 ft.
◼ A maximum of 2 elbows is allowed in any portion (duct, tube heater, vent) with the exception of
up to three 90° elbows in a vertical vent run through the roof, for a total of maximum 6 (vertical
vent: 7) 90° elbows in the combined system.
◼ Combustion air duct is not to exceed lengths in table below and may be 4” or 5” diameter for
inputs less than 200,000 Btuh, but must be 5” diameter for inputs 200,000 Btuh and greater.
• 5” diameter duct requires a reducer to 4” diameter at the connection to blower inlet.
◼ Exceeding the allowable lengths in the table below can create combustion and/or condensa-
tion issues and will void Certification and the heater warranty.
◼ Do not exceed the  regardless of the allowed maximum
length of individual vent or combustion air duct.

17
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C

Installations up to 4500 ft - Higher altitudes refer to Section 27

150,000 Btuh Heater:
Tube Heater Length 50 ft
1 x 90° elbow (vent) 5 ft
Straight vent 20 ft
1 x 90° elbow (duct) 5 ft
Air Duct: 4” Ø17 ft
Combined Length 97 ft
Max. Allowed 100 ft
Additional 20’ for 5” Ø Air Duct








(by Duct Diameter)


Individual: 4ӯ
OR
Combined: 6ӯ
from each
heater
Using
4” Air
Duct
Using
5” Air
Duct
4” Ø5” Ø
45,000
& 60,000   20 ft 40 ft 20 ft
80,000   20 ft 40 ft 20 ft
110,000
to 150,000   30 ft 50 ft 30 ft
175,000   30 ft 50 ft 40 ft
200,000 -  Use 5”Ø30 ft 40 ft

A radiant tube heater will expand and contract as it heats and cools. Configuration of the vent must
allow for heater expansion.
 : Orientation of the vent at 90° to heater will allow for heater expansion and
contraction.
: (See FIG. 4)
◼ Wall Thimble or flashing at wall
that allows movement of the vent
through the opening. Do not seal
the vent to the thimble or flashing
with caulking.
OR
◼ Offset vent with two x 90° elbows.
Install minimum 12 inch [305 mm]
length of straight vent between
elbows. Vent can be sealed with
caulking at non-combustible wall.
◼ Other means of slip fit installation
of the vent are acceptable provid-
ing there is adequate allowance
for free expansion and contraction
of the system, and free flow of
vent gases.

--

For vertical vent only, two heaters can be commonly vented using 4”x 6”x 4” Vent Tee JA- 0514-XX.
Both heaters must be operated using one common thermostat. Common vent is 6 inch [150 mm] di-
ameter.
Category III (horizontal vent) heaters cannot be common vented.

18
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
:
It is the sole responsibility of the installer to adhere to all current local codes and/or ANSI Z223.1 /
CSA.B149.1 latest editions for all venting requirements, and practices. Also adhere to instructions
below, and the instructions of the vent manufacturer. Use vent materials certified for Category I.
All models of this series heater are certified Category I for vertical venting. See FIG. 5.
◼ The vertical Type B-vent must extend at least 5 feet [1524 mm] above the flue collar of the
highest connected heater.
◼ USA: Horizontal run of single wall vent or vent connector (“H” in FIG. 5) must not exceed 75%
of the vertical height of the vent. If it does, then the vent system must be for Category III.
◼ Single wall vent connector material must be corrosion-resistant galvanized steel with a mini-
mum thickness specified in local code.
◼ A vent connector must be secured to the flue collar using quantity 3 x #8 x 1/2” sheet metal
screws. Seal penetrations and connections with high temperature RTV silicone sealant.
◼ A horizontal vent connector shall be installed and supported without any dips or sags and
shall slope upward toward the vent or chimney at least 1/4 in./ft (20 mm/m).
◼ Use a certified termination cap as supplied by the manufacturer of the vent.
◼ When vent and combustion air are taken through the roof, the exhaust vent should always
terminate higher than the combustion air intake, to prevent recycling the products of combus-
tion back into the heater.
◼ The vent must extend at least 2 feet [610
mm] above the highest point where it passes
through a roof. The vent must also extend at
least two feet higher than any portion of a
building within a horizontal distance of 10
feet [3 m].
◼ Keep vent connector runs as short as possi-
ble with a minimum number of elbows. Refer
to the current edition of ANSI Z223.1 (NFPA
54)or CSA-B149 installation codes for maxi-
mum length of horizontal vent and vent con-
nector.
◼ Total length of the vent connector and vent
pipe cannot exceed the values in Table 4
above.
◼ A single-wall vent connector shall not be in-
sulated.
◼ For single−wall vent clearance to combusti-
bles is 6" [152mm] except where a listed
clearance thimble is used. Clearance to
combustible material for Type B-Vent or fac-
tory-built vent per the vent manufacturer’s
instructions.
◼ When an existing Category I heater is removed or replaced, the original venting system may
no longer be sized to properly vent the attached appliances. Improperly sized venting sys-
tems can result in vent gas leakage or condensation.


19
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
:
All vent must be installed in accordance with local codes or, in the absence of local codes, with the
National Fuel Gas Code in the USA, ANSI Z223.1/NFPA 54; or the Natural Gas and Propane Instal-
lation Code CSA B149.1 in Canada.
When installed with a horizontal vent through a sidewall, this heater is a Category III appliance, and
the vent system must be approved for Category III application in accordance with UL-1738 or ULC-
S636. Do not use PVC or plastic vent pipe.
◼ Use either a certified Category III venting system, or single wall vent pipe with all of the joints
and seams sealed with a heat-resistant pliable sealant.
◼ The vent system must be installed in accordance with these instructions, and the instructions
of the vent manufacturer.
◼ A single wall vent system may use a single continuous 36 inch section of double wall vent pipe
to pass through an exterior wall:
• Single wall galvanized vent pipe (C-Vent): Minimum 26 ga.
• Single Wall to Double Wall Adapter: Duravent 4PVP-AD Adapter or equivalent.
• 36 Inch Double wall vent through outside wall: Duravent PelletVent Pro (PVP) or equivalent:
◼ Single-wall vent: Seal all joints and seams in the pipe, and the adapter with high temperature
Red RTV sealant for temperatures up to 600°F [315°C]. The sealant must remain pliable when
in use. Follow the instructions of the vent manufacturer for sealing vent pipe connections.
◼ All vent sections and vent connector must be secured using quantity 3 x #8 x 1/2” sheet metal
screws. Seal penetrations and connections with high temperature RTV silicone sealant.
◼ Any horizontal portion of the flue vent system must slope downwards away from the heater a
minimum of 1/4" per foot run [63 mm/ 300 mm] toward the vent terminal.
◼ Horizontally vented Category III heaters must be individually vented and cannot use a common
vent.
◼ Use approved 4" [102 mm] (JA-0528-XX) horizontal wall vent terminal or an approved high-
wind termination cap.
◼ Installation of the vent must prevent blockage by snow and protect building materials from deg-
radation by flue gases.
◼ Install termination cap a minimum of 18 inches (45 cm) from the outside wall to the inside edge
of terminal opening to alleviate back pressure caused by turbulent wind conditions (See Fig.
8). This also ensures flue gases are directed away from the structure to protect building mate-
rials from degradation by the exhausted flue gases.
◼ At most two 90° elbows can be installed in a horizontal vent.
◼ All seams and joints must be checked for gas tightness after installation. With the heater in op-
eration, conduct a leak test on all vent connections, joints, and seams using a soap solution.
◼ A horizontal flue vent will not terminate less than 1 ft [30 cm] above grade level, unless its lo-
cation is adjacent to a public walkway, then it must not terminate less than 7 ft [2.1m] above
the walkway.
◼ Clearance above vent terminal under a combustible overhang or soffit:
• As indicated in FIG. 6 for approved terminations: 4" [100 mm] JA-0528-XX.
• For other approved terminations: Will terminate 3 ft [915 mm] or more below a combustible
soffit or overhang.
◼ A horizontal vent termination must be a minimum of 6 feet [1830 mm] from an inside corner
formed by two exterior walls.
◼ All vent pipe, adapters, thimbles, supplied locally by others.
Specific requirements for horizontal vent in the USA and Canada are on the next page.

20
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
specific horizontal vent requirements:
◼ The vent terminal of an appliance with an input up to 50,000 Btu/hr (14.7kW) shall be in-
stalled with a 9 inch [230mm] vent termination clearance from any air opening into a building,
and an appliance with an input over 50,000 Btu/hr (14.7kW) shall have at least a 12 inch
[305 mm] vent termination clearance. The bottom of the vent terminal and the air intake shall
be located at least 12 inches [305 mm] above grade.
◼ A horizontal vent will not terminate:
• Less than 3 ft [915 mm] above a mechanical air inlet located within 10 ft [3 m].
• Less than 4 ft [1219 mm] below, 4 ft [1219 mm] horizontally from, and 1 ft [102 mm]
above any window or door that opens, or gravity air inlet to a building.
• Less than 4 ft [1219 mm] horizontal clearance from gas and electric meters, regulators
and relief equipment.

specific horizontal vent requirements:
◼ A horizontal vent will not terminate:
• Within 6 ft [1830 mm] of a mechanical air supply inlet to any building.
• Above a gas utility meter and regulator assembly within 3 ft [915 mm] horizontally of
the vertical centerline of the regulator vent outlet to a maximum vertical distance of 15
ft [4.5 m].
• Within 3 ft [915 mm] of any gas pressure regulator vent outlet.
• Within the following distances of a window or door that can be opened in any building,
of any non-mechanical air-supply inlet to any building, or of the combustion air inlet of
any other appliance:
• 12 inches [305 mm] for inputs up to and including 100,000 Btuh (30 kW).
• 3 ft [915 mm] for inputs exceeding 100,000 Btuh (30 kW).
