Schwank SEM 200-70 Installation instructions

GP-MSEM-BX-03B
SEM(U) / IT(U) Manual
RD: Sept, 2005
RL: 03B
KH
FIELD CONVERTIBILITY:
“The conversion shall be carried out in accordance
with the requirements of the provincial authorities
having jurisdiction and in accordance with the
requirements of the B149.1 (latest edition)
INSTALLATION CODE” in Canada, and the ANSI
Z223.1 (latest edition) in the U.S.A.
SERIES
LOW INTENSITYTUBE TYPE
INFRARED HEATERS
FOR YOUR SAFETY:
Do not store or use gasoline or other flammable va-
pours and liquids in the vicinity of this or any other
appliance.
If you smell Gas:
>Extinguish any open flames
>Don’t touch electrical switches
>Call your Gas supplier immediately
INSTALLATION / OWNER’S MANUAL
SEM(U) IT(U)&

GP-MSEM-BX-03B
SEM(U) / IT(U) Manual
RD: Sept, 2005
RL: 03B
KH
Schwank Inc.
5285 Bradco Boulevard
Mississauga, Ontario,
L4W 2A6
Phone: [phone]
Fax: [phone]
1-866-361-0417
PO Box 988, 2 Schwank Way
Waynesboro, Georgia,
USA 30830
Phone: [phone]
Fax: [phone]
1-877-446-3727
e-mail: [email protected]
http://www.schwankheaters.com
InfraSave Inc.
Mississauga, Ontario,
Waynesboro,Georgia,
Phone: 1-866-INFRASV (463-7278)
Fax: [phone]
http://www.infrasave.com
e-mail: [email protected]
NOTICE:
The Manufacturer reserves the right to make changes to
equipment and specifications without obligation or notifi-
cation.
This publication, or parts thereof, may not be reproduced
in any form, without prior written consent from The Manu-
facturer. Unauthorized use or distribution of this publica-
tion is strictly prohibited.

GP-MSEM-BX-03B
SEM(U) / IT(U) Manual
RD: Sept, 2005
RL: 03B
KH
SEM(U) / IT(U)
INFRA-RED GAS TUBE HEATERS
TABLE OF CONTENTS
TOPIC PAGE NUMBER
1. GENERAL................................................1
2. INSTALLATION IN AIRCRAFT
HANGARS................................................1
2.1 INSTALLATION IN COMMERCIAL
GARAGES............................................... 1
3. INSTALLATIONS OTHER THAN
SPACE HEATING...................................1
4. HEATERS AND TUBE KITS .................2
TUBE KIT MATRIX ...............................3
5. PRE-INSTALLATION SURVEY............5
6. MOUNTING CLEARANCES .................5
7. SYSTEMS INCORPORATING 90
DEGREE ELBOWS.................................7
8. SUSPENSION SYSTEM .........................8
9. BURNER AND TUBE
INSTALLATION...................................10
10. REFLECTOR INSTALLATION ..........11
TOPIC PAGE NUMBER
11. FLUE VENTING ...................................14
12. COMBUSTION AIR DUCT..................16
13. GAS SUPPLY INSTALLATION .........16
14. HEATER EXPANSION.........................18
15. ELECTRICAL AND THERMOSTAT
WIRING .................................................18
16. HIGH ALTITUDE INSTALLATIONS.19
17. OPERATING SEQUENCE....................20
18. LIGHTING INSTRUCTIONS ..............21
19. RECOMMENDED MAINTENANCE...21
20. WIRING DIAGRAM.............................22
21. TROUBLE SHOOTING GUIDE ..........23
22. SPARK IGNITION CIRCUIT ...............25
23. START UP SHEET................................26
24. OPTIONAL COMPONENTS................ 28
25. ALTITUDE CONVERSION CHART...32
26. LIMITED WARRANTY........................33

GP-MSEM-BX-03B
SEM(U) / IT(U) Manual
RD: Sept, 2005
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KH

GP-MSEM-BX-03B
SEM(U) / IT(U) Manual
RD: Sept, 2005
RL: 03B
KH
GAS INFRA-RED TUBE HEATER
SEM(U) / IT(U) SERIES
INSTALLATION INSTRUCTIONS
It is recommended that this heater be installed
by a professional gas heating equipment ser-
vice person. Installation of the SEM(u)/IT(u)
Series gas-fired tube heaters must conform to
all manufacturers heating installation design
procedures including ventilation. All local,
provincial and national code requirements in-
cluding the current latest edition B149.1-00
INSTALLATION CODE” in Canada, and
ANSI Z223.1 in the U.S.A. for gas burning
appliances and equipment. The latest edition
Electrical Code PART 1 CSA C22.1 in Can-
ada and ANSI/NFPA N0 70 in the U.S.A.
must also be observed. Due to ever changing
standards and requirements, revision to our
equipment and installation procedures may be
necessary. In case of discrepancies, the latest
installation manual will take priority. The
SEM(u)/IT(u) heater may be installed for
heating of non-residential indoor spaces. It is
beyond the scope of these instructions to em-
brace all conditions that will be encountered.
All system piping must be supported in ac-
cordance with acceptable practice, local
codes, and applicable standards.
1. GENERAL
2. INSTALLATION IN COMMERCIAL AIRCRAFT HANGARS
3. INSTALLATIONS OTHER THAN SPACE HEATING
Use for process applications will void the C.S.A certification and may require field inspection
and/or certification.
such as offices and shops, which commu-
nicate with areas for servicing or storage.
Refer to the proper mounting clearances
to combustibles.
C. Heaters must be located so as to be pro-
tected from damage by aircraft and other
objects, such as cranes and movable scaf-
folding.
D. Heaters must be located so as to be acces-
sible for servicing and adjustment.
2.1 INSTALLATION IN COMMERCIAL GARAGES
The SEM(U) / IT(U) Infra red Heaters are
suitable for use in commercial garages when
installed in accordance with minimum clear-
ances to combustible construction or material
in storage, from heater and vent, to standard
ANSI Z223.1 latest edition, in the U.S.A. and
CSA B149.1-00, in Canada. “Overhead heat-
ers shall be installed at least (8) feet above
the floor”. In addition, they shall be located
high enough to maintain the minimum dis-
tance to combustibles, as shown on the heater
rating plate, between the heater and any vehi-
cles parked below the heater
The SEM(U) / IT(U) Infra red Heaters are
suitable for use in aircraft hangars when in-
stalled in accordance with the following.
A. A minimum clearance of 10 ft from bot-
tom of the heater above the highest sur-
face of the highest aircraft which may oc-
cupy the hangar.
B. A minimum clearance of 8 ft must be
maintained from the bottom of the heater
in other sections of the aircraft hangar
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NOTE: Where required, the series SEMU/ITU heaters will be supplied with the turbulators, installed into the end tube(s) of the system
configurations.
** 2000 feet above sea level for the USA – see Orifice Altitude Conversion Chart on page 35
TABLE 1: MODEL
CONFIGURATIONS OVERALL
HEATER
LENGTH
BTU/HOUR INPUT
0 TO 4500 FT ABOVE
SEA LEVEL
TURBULATOR
REQUIRED
LENGTH
GAS
PRESSURE &
ELECTRICAL
SHIPPING
WEIGHT
(LBS.)
SEM / IT 200-70 69’ 4”
200,000
10’ LINE
MINIMUM
5" W.C. N.G.
11" W.C. L.P.
LINE
MAXIMUM
14" W.C. N.G.
14" W.C. L.P.
MANIFOLD
3.5" W.C. N.G.
10" W.C. L.P.
½" INLET
ELECTRICAL
120V, 60 HZ
328
SEM / IT 200-60 59’ 8” 10’ 283
SEM / IT 200-50 50’ 0” 10’ 239
SEMU/ITU 200-30 31’ 11” 10’ 287
SEM / IT 175-70 69’ 4”
175,000
10’ 240
SEM / IT 175-60 59’ 8” 10’ 283
SEM / IT 175-50 50' 0” 10’ 239
SEMU/ITU 175-30 31’ 11” 10’ 287
SEM / IT 155-60 59’ 8”
155,000
Not Required 283
SEM / IT 155-50 50’ 0”' Not Required 239
SEM / IT 155-40 40' 4” 10' 195
SEMU/ITU 155-30 31’11” Not Required 287
SEMU/ITU 155-20 22' 3” 10' 199
SEM / IT 130-50 50' 0”
130,000
Not Required 239
SEM / IT 130-40 40’ 4” 10' 195
SEM / IT 130-30 30’ 8” 14' 150
SEMU/ITU 130-20 22’ 3” 10' 199
SEMU/ITU 130-15 17’ 3” 14’ 154
SEM / IT 110-50 50’ 0”
110,000
Not Required 239
SEM / IT 110-40 40’ 4” 10' 195
SEM / IT 110-30 30’ 8” 14' 150
SEMU/ITU 110-20 22’ 3” 10' 199
SEMU/ITU 110-15 17’ 3” 14’ 154
SEM / IT 80-40 40’ 4”
80,000
10’ 195
SEM / IT 80-30 30’ 8” 14' 150
SEM / IT 80-20 21’ 0” 14' 106
SEMU/ITU 80-15 17’ 3” 14' 154
SEMU/ITU 80-10 12’ 7” 14' 106
SEM / IT 60-30 30’ 8”
60,000
14’ 150
SEM / IT 60-20 21’ 0” 14' 106
SEMU/ITU 60-10 12’ 7” 14’ 90
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BURNER & TUBE KIT ASSEMBLY CHART
MODELS: SEM, IT: Commercial / Industrial Applications
BURNER KIT
FIRING RATE TM-1420-
SX TM-1430- SX TM-1040- SX TM-F030- SX TM-1030- SX TM-1010- SX TM-0020- SX
T
M-0030-
SX
20' 1
30' 1
20' 1
30' 1
40' 1
or 1+ 1
30, 1
40' 1
or 1+ 1
50' 1+ 1
30, 1
40' 1
or 1+ 1
50' 1+ 1
40' 1
or 1+ 1
50' 1+ 1
60' 1+ 1
50' 1+ 1
60' 1+ 1
70' 1+ 2
50' 1+ 1
60' 1+ 1
70' 1+ 2
Stand-Alone Tube Kits require no additional tube kits.
Primary Tube Kits require at least one additional Secondary Tube Kit.
Secondary Tube Kits require a Primary Tube Kit.
Secondary Tube Kit TM-1010-SX can also be used as a 10 ft extension kit; the installer
will need to remove the turbulator (refer to Turbulator Chart in the I&O Manual).
Stand-Alone Kits Primary Kits Secondary Kits
200,000
155,000
175,000
110,000
130,000
60,000
80,000
TUBE KIT PART # & QUANTITY REQUIRED
MODELS:SEMU / ITU
TUBE KIT SELECTION CHART 2ndary
Tube Lengths -> 2 x 10' 2 x 15' 2 x 20' 2 x 20' 2 x 20' 2 x 10'
Tube Kit # ->
Length
10' U 1
10' U 1
15' U 1
15 'U 1
20' U 1
15 'U 1
20' U 1
20' U 1
30' U 1 + 1
30' U 1 + 1
30' U 1 + 1
* Stand-Alone & Primary Kits include JS-0513-BU 180° Turn Box
packed and shipped in a separate carton.
TM-1410-
SU TM-1415- SU TM-1020- SU
TUBE KIT PART # & QUANTITY REQUIRED
Stand-Alone Kits* Primary Kits*
TM-0020-
SU TM-A120- SU TM-0010- SU
175,000
200,000
INPUT (Btuh)
80,000
110,000
130,000
155,000
60,000
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5. PRE-INSTALLATION SURVEY
The SEM(U) / IT(U) heating system must
have gas piping of the correct diameter,
length, and arrangement to function properly.
For this reason, a layout drawing is nec-
essary.
Carefully survey area to be heated, and for
best results, whenever possible, place burner
and combustion chamber in coldest area.
6. MOUNTING CLEARANCES
This heater must be mounted and positioned
to maintain the minimum clearance to com-
bustible materials as shown in FIGURE 1
(PAGE 6) TABLE 3 (PAGE 6). For recom-
mended heater placement refer to TABLE 2
(below). Heaters should also be located and
installed with respect to building construction
and equipment to provide a minimum clear-
ance of 24 inches from the end of burner
housing for servicing and cleaning of burner,
blower and controls. A minimum horizontal
clearance of 4 ft. from electrical meters, gas
meters, regulators and relief equipment is re-
quired by ANSI Z223.1.& CSA B149.1-00.
TABLE 2 RECOMMENDED HEATER PLACEMENT
MODEL
MOUNTING
HEIGHTS
(FEET)
MAXIMUM
DISTANCE
BETWEEN
HEATERS
(FEET)
DISTANCE-OUTSIDE WALL
TO HEATER LONG AXIS
PARALLEL TO WALL (FEET)
HORIZONTAL ANGLE
SEMU/ITU 200 18 – 25 50 17 – 25
COMBUSTIBLE
CLEARANCE
SEMU/ITU 175 18 – 25 50 17 – 25
SEMU/ITU 155 16 – 21 45 15 – 20
SEMU/ITU 130 15 – 21 40 15 – 20
SEMU/ITU 110 13 – 19 35 13 – 18
SEMU/ITU 80 10 – 16 30 12 – 16
SEMU/ITU 60 8 – 14 25 11 – 15
IMPORTANT: Continuous operation of single or multi-heater placement must
not cause any combustible material in storage to reach a
temperature in excess of 160OF.
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SEMU/ITU 200 7" 22" 68" 7" 1" 57" 68"
SEMU/ITU 175 6.5" 20" 68" 6.5" 1" 47" 68"
SEMU/ITU 155 6" 19" 64" 6" 1" 44" 64"
SEMU/ITU 130 4" 11" 60" 5" 1" 35" 56"
SEMU/ITU 110 3" 10" 60" 4.5" 1" 26" 54"
SEMU/ITU 80 2.5" 6" 42" 3.5" 1" 23" 38"
SEMU/ITU 60 2.5" 5.5" 33" 3" 1" 17" 34"
TABLE 3 MINIMUM CLEARANCES TO COMBUSTIBLES
MODEL
SUSPENDED HORIZONTALLY SUSPENDED AT AN ANGLE UP TO 45 DEGREES
TOP SIDE BELOW TOP REAR FRONT BELOW
A B C D E F G
SEM/IT 200 7" 22" 68" 7" 1" 57" 68"
SEM/IT 175 6.5" 20" 68" 6.5" 1" 47" 68"
SEM/IT 155 6" 19" 64" 6" 1" 44" 64"
SEM/IT 130 4" 11" 60" 5" 1" 35" 56"
SEM/IT 110 3" 9.5" 60" 4.5" 1" 26" 54"
SEM/IT 80 2.5" 6" 42" 3.5" 1" 23" 38"
SEM/IT 60 2.5" 5.5" 34" 3" 1" 17" 34"
FIGURE 1 MINIMUM CLEARANCES TO COMBUSTIBLES
SEMU / ITU
SEM / IT
D
B
A
C
F E
G
up to 450
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7. SYSTEMS INCORPORATING 90OELBOWS
The 900elbows are shipped as a kit with one
clamp and two end caps to close off the re-
flector ends each side of the elbow (s). The
Reflectors must be secured with four screws
to each of the end caps. (see FIG 10 Page 11)
FIGURE 2 SYSTEM CONFIGURATIONS
System Configuration
1 Straight line
2 “U” tube with Turn Box
3 “L” tube with 900elbow kit
4 Twinned tubes into common TEE flue vent
* Note: Both heaters must be connected
with a single common thermostat
Venting Options
A Flue vent through wall 4”
B Flue vent through wall or roof 6”
C Flue vent through roof
D Flue vent into building, exhaust fan inter
locked with heater
E Combustion air intake from outside
through wall.
F Combustion air intake from outside
through roof
G Combustion air intake from inside
building
IMPORTANT: * (STRAIGHT TUBE MODEL ONLY) *
B
E A
G4
3
G
G
D2
1
F
C
On Models SEM(U) / IT(U), 175 a minimum of 30´ of straight radiant tube must be con-
nected to the burner before any elbow. On Models SEM(u)/IT(u) 155, 130, and 110 a
minimum of 20´ of straight radiant tube must be connected to the burner before any el-
bow. And on Models SEM/IT 80 and 60, a minimum of 10´ of straight radiant tube
must be connected to the burner before any elbows. Not applicable to SEMU/ITU model
The SEM(U) / IT(U) Series radiant tube
heater can be installed in configurations as
illustrated in Fig:2 (below) with a maximum
of two 900 elbows per heater. The use of ra-
diant elbows reduces the total maximum vent
allowable. (See SECTION: 11 PAGE 13)
Flue Venting.
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8. SUSPENSION SYSTEM
The system configuration and available
support locations must be considered in order
to locate the radiant tubes correctly. Labour
and material can be reduced by locating
(system configuration permitting) directly
under structural members such as joists, steel
or wood beams, etc.
Chain is recommended for hanging the tube
system, connecting the hangers to beam
support as illustrated in FIGURE 3 (below).
To support burner and keep it level, a
separate suspension chain must be attached
to the eye hook at flange end of burner angled
slightly back over burner, FIGURE 4
(below). This will permit normal expansion
and contraction of the tube system. (If rigid
devices such as rods are used in place of
chain, swing joints or other means of
sufficient length must be provided to
compensate for expansion.)
FIGURE 4 SEM TYPICAL HANGER & SUPPORT SPACING
FIGURE 3 SUGGESTED MOUNTING HARDWARE
EYE BOLT THROUGH
HOLE IN BEAM BEAM CLAMP
WITH EYE SCREW EYE SCREW PIPE RING OR CLEVIS BAR-JOIST CLAMP
* Distances shown are recommendations and may be varied to match field requirements.
ALL TUBES MUST BE SUSPENDED BY TWO (2) HANGERS PER 10’ LENGTH, MOUNTED APPROXIMATELY 6” TO 12”
IN FROM EACH TUBE END.
10
13
2
11
4
3
5
6
8
7
91
1
12
3" 4"
"ALL TUBES MUST BE SUSPENDED BY TWO (2) HANGERS PER 10' LENGTH,
MOUNTED APPROXIMATELY 6" TO 12" IN FROM EACH TUBE END.
9– Reflector
10- Flue Vent terminal
11- Burner Support Chain
12- Hanger Support Chains
5- Sight Glass
6- Aluminized Tube with Flange
7– Tube Coupler
8- Steel Tube(s)
1- End Cap
2- Wire Hanger
3- Burner Assembly
4- Combustion Air Intake
(optional-c/w FAI adapter)
4”
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FIGURE 5 SEM(U) / IT(U) TYPICAL HANGER & SUPPORT SPACING
FIGURE 6
BOLTING BURNER TO FLANGED TUBE
FIGURE 7 COUPLER KIT
.
1 Eye Hook
2 Fifth Nut (Holding Inner Burner to
Housing)
3 Lock Washers (4) Four
4 Nuts (4) Four
Note: Nuts may be shipped c/w
lock-washers as one piece
•Align the four burner bolts through the
tube flange, secure tightly with lock
washers and nuts.
•Note: A Flange Gasket is not required
for this application
•Do not loosen or remove fifth nut (#2)
directly below burner cup
•Secure suspension chain to eye hook
in order to stabilize burner
1
2
34
ALL TUBES MUST BE SUSPENDED BY TWO (2) HANGERS PER 10’ LENGTH, MOUNTED APPROXIMATELY 6” TO 12”
IN FROM EACH TUBE END.
10
13
2
11
4
3
5
6
8
7
91
1
12
3" 4"
"ALL TUBES MUST BE SUSPENDED BY TWO (2) HANGERS PER 10' LENGTH,
MOUNTED APPROXIMATELY 6" TO 12" IN FROM EACH TUBE END.
3
21
4
5
1 Tube
2 Tube Coupler
3 Swaged section of tube
4 Point at which the Swaged tube
slides into other section of tube
5 Once the two tubes are joined
together, place the centre of
the Coupling over the line of
the joint and tighten.
9- Reflector
10- Turn Box
11- Burner Support Chain
12– Bracket Support Chain
5- Sight Glass
6- Aluminized Tube with Flange
7- Tube Coupler
8- Steel Tube(s)
1– Double End Cap
2– Hanging Bracket
3- Burner Assembly
4- Combustion Air Intake
(optional-c/w FAI adapter)
4”
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9. BURNER AND TUBE INSTALLATION
With all hangers suspended at the same
height, insert first aluminized tube section,
through 4" hole into first two wire hangers.
Bolt burner to flange on first tube section,
SEE FIGURE 6 (page 9). Subsequent lengths
of tube can then be installed, by joining them
together one inside the other and locking the
joints using the aluminized steel clamp. SEE
FIGURE 7 (page 9). Models SEM(U) / IT(U)
200 & 175 have alumatherm as the first sec-
tion with a welded Flange, the second section
is aluminized, and subsequent lengths are
steel painted.
Slacken the bolts and slip the coupler over
the end of the pipe to be joined, making sure
the swaged end of the tube is fully inserted
into the plain end of the tube before re-
positioning the coupler. The coupler should
then be centred across the joint before tight-
ening up.
If a turbulator is necessary it will be factory
installed into the tube(s). The tube(s) will be
marked stating where it must be installed in
the system, see TABLE 4 (page 12) for the
models which do require turbulators.
Note: Turbulators are ALWAYS
installed at the vent end of the heater .
FIGURE 8 TURN BOX
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10. REFLECTOR INSTALLATION
After burner and tubes have been installed,
slide the focus shield reflectors one at a time
into the wire hangers. As each successive
focus shield reflector is installed on an in-line
installation, the ends of the focus shield
reflectors will overlap to provide continuous
coverage over the entire tube system. The
overlapping joints MUST BE FASTENED
together.
Note that for both horizontal and angle
mounting, the tube must be level. Improper
mounting can result in overheating of
controls and combustible materials. Use only
non-combustible mounting hardware.
Side reflectors can be added to the heaters as
an option. They should be secured directly to
the focus shield reflector using "S" hooks or
chain. Drill three holes into the focus shield
reflector flange along side, matching up with
three holes already in side reflector. Mount
side reflector as close as possible to the focus
shield reflector.
FIGURE 9 90 DEGREE ELBOW INSTALLATION
590
0Elbow
6 Tube Coupler
7 Point at which Swaged tube is fully
inserted into elbow and Swaged end
of elbow is fully inserted into tube.
1 End-Cap
2 Reflector
3 End Cap Flange OVER Reflector
4 End Cap Flange UNDER Reflector
1
2
2
3 3
44
5
6
7
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TABLE 4
MODEL
TURBULATOR
LENGTH
(IF REQUIRED)
SEM/IT 200-70/60/50 10’
SEM/IT 175-70/60/50 10’
SEM/IT 155-60/50 not required
SEM/IT 155-40 10'
SEMU/ITU 155-30 not required
SEMU/ITU 155-20 10’
SEM/IT 130-50 not required
SEM/IT 130-40 10'
SEM/IT 130-30 14'
SEMU/ITU 130-20 10’
SEMU/ITU 130-15 14’
SEM/IT 110-50 not required
MODEL
TURBULATOR
LENGTH
(IF REQUIRED)
SEM/IT 110-40 10'
SEM/IT 110-30 14'
SEMU/ITU 110-20 10’
SEMU/ITU 110-15 14’
SEM/IT 80-40 10’
SEM/IT 80-30 14'
SEM/IT 80-20 14'
SEMU/ITU 80-15 14’
SEMU/ITU 80-10 14’
SEM/IT 60-30 14’
SEM/IT 60-20 14’
SEMU/ITU 60-10 14’
NOTE: Where required the SEMU/ITU Series Heaters will be supplied with the turbulators,
snugly installed into the vent end tube (s) of the system configuration.
FIGURE 11 REFLECTOR ARRANGEMENTS
FIGURE 10 MOUNTING REFLECTOR END CAP
1 Reflector End Cap Flange
protruding over and under
the Reflector
2 Screws securing Reflector
to End Cap
3 Opening for Tube
4 Focus Shield Reflector
1 4
3
2
TUBES BURNER MUST
BE LOWER
VENT RUN
(TOP)
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FIGURE 16 REFLECTOR EXTENSIONS - JS-0509-XX-P
(OPTIONAL - IF REQUIRED )
•Using “S” Hooks attach the two
Reflectors.
•Make sure “S” Hooks are closed
10”
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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 Elbow
or Vent Cap is fitted. When the heater is in-
stalled and indirectly vented, it is required in
Canada that the heater be electrically inter-
locked 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 un-
vented the system requires consideration of
normal infiltration and introduction of outside
air by natural or mechanical means, and/or
electrically interlocked to an independent ex-
haust fan. Consult your local codes and ANSI
Z223.1 latest edition. for all venting require-
ments, and practices.
A length of ‘C’ Vent is to be installed on the
swaged end of the last tube before any 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 ap-
proximately 1/4" per foot toward the vent ter-
minal, starting at the termination of the radi-
ant tube. For horizontal through the wall
venting, the approved 4" or 6" horizontal wall
vent terminal should be used and mounted
18" from the outside wall to the inside edge
of terminal opening. The flue vent terminal
used must be of the approved type supplied
by the manufacturer or by an approved "B"
vent manufacturer. It is the responsibility of
the installer to be familiar with current local
codes or ANSI Z223.1 / CSA.B149.1-00 lat-
est editions for all venting requirements, and
practices.
THIS SEM(U) / IT(U) 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.
IFASEVERE NEGATIVE PRESSURE IS EXPERIENCED OR ANTICIPATED, THE SEC-
OND PORT (BARB) ON THE BLOCKED FLUE SWITCH SHOULD BE CONNECTED DI-
RECTLY TO OUTSIDE AIR USING 1/4” PLASTIC HOSE FROM BLOCKED FLUE
SWITCH TO OUTSIDE OF BUILDING (HOSE KIT NOT SUPPLIED – OPTIONAL EX-
TRA).
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The heater is designed to operate with single
wall 4” diameter 26 gauge minimum exhaust
vent.
When venting horizontally, the flue vent sys-
tem should slope downwards approximately
1/4" per foot toward the vent terminal, start-
ing at the termination of the radiant tube.
When vent and combustion air are taken
through the roof, the exhaust vent should al-
ways terminate higher than the combustion
air intake, to prevent recycling the products
of combustion back into the heater.
The total maximum allowable combined
length of vent and combustion air duct is 80'
for SEM / IT 200, 175, 155 and 130, and 50'
for SEM / IT 110, 80, 60 and 45. Total maxi-
mum allowable combined vent and duct is
reduced by ten feet for every 90oelbow in-
stalled in the vent or duct. Should the tube
system be installed with a 90oelbow in the
radiant tube, 10 ft must be deducted from the
length of vent and duct. Should the tube sys-
tem be installed with a 180oelbow or an SEM
(U) / IT(U) turn box in the radiant tube, 20 ft
must be deducted from the length of vent and
duct. Neither the individual flue vent nor the
combustion air duct is to exceed 50 ft in
length. Exceeding the allowable lengths may
create condensation problems and will void
CSA Design Certification. The horizontal
flue vent shall not terminate less than the fol-
lowing guidelines except where indicated in
brackets:
•One feet above grade level, unless its lo-
cation is adjacent to public walkways,
then it has to be not less than seven feet.
•Must be installed to prevent blockage by
snow and protect building materials from
degradation by flue gases.
•Directly below a soffit or over- hang.
•Directly above a gas utility meter or ser-
vice regulator.
•Twelve inches from combustion air inlet
of any heater with input up to 100,000
Btu/hr.
•Three feet from combustion air inlet of
any heater over 100,000 BTU.
•Within six feet of a mechanical air supply
inlet to any building.
•Twelve inches from sides and bottom and
eighteen inches from top when installed
close to the corner of a building.
•All vent pipe with a slip fit connection
must be mechanically secured. A length
of ‘C’ Vent is to be installed on the
swaged end of the last tube before any
Tee is fitted.
•As an Option, two heaters may be vented
through an approved common 4"x4"x6"
Vent Tee, supplied by the manufacturer.
The two heaters must then be controlled
by a single common thermostat or “ON/
OFF” switch.
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SEM(U) / IT(U) Manual
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Order Optional Parts:
Air Intake Flange:.... Heater Model Reqd.
Air Intake Vent Cap:............JS-0532-VC
12. COMBUSTION AIR DUCT
Where heater is operated in a negative air
condition or in contaminated air atmosphere
such as woodworking shops, air for combus-
tion must be ducted from outside to intake
flange on blower. The total maximum com-
bined length of vent and combustion air duct
is 80' for SEM(U) / IT(U) 200, 175, 155 and
130, and 50' for SEM(U) / IT(U) 110, 80, 60
and 45. Neither the individual flue vent or
combustion air duct is to exceed 50'. The to-
tal maximum allowable combined vent /air
duct is reduced by ten feet for every 90ovent
elbow installed.
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 in-
sulation manufacturer.
Check with the manufacturers Technical Sup-
port as to the maximum vent temperature re-
quirements.
The vent system must always be adequately
supported to prevent sagging.
FIGURE 18 FLUE VENT CONNECTION
For Direct and Indirect Venting it is recommended to install a length of ’C’ Vent onto the
end of the last tube before any fittings are installed. The “C” Vent connection should be
slipped onto the tube and positioned approx 6” beyond the swaged portion of the 4” tube
and must be secured with sheet metal screws.
FLUE VENT END
OF TUBE
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Do not install filters on the combustion air
intake.
For ease of installation, this heater has an op-
tional fresh air intake duct hood. It can be
used as an outdoor intake hood to bring com-
bustion air to the heater from outside. If
drawing in fresh air from outside, it is recom-
mended as per common Engineering practice,
that any single wall pipe exposed to cold air
must be insulated to prevent condensation. If
heater is being vented horizontally through
Minimum air intake inlet distances:
Three feet above grade
Twelve inches from flue vent terminal of
heaters with input up to 100,000 Btu’s/hr.
Three feet from flue vent terminal of any
heaters over 100,000 Btu/hr.
13. GAS SUPPLY INSTALLATION
It is recommended that a locally approved
flexible connector supplied by the distributor,
be installed between the heater and gas pip-
ing. The heater must be isolated from the gas
supply piping system by closing its individual
manual shut off valve (supplied by installer)
during any pressure testing of the gas supply
piping system.
If a rigid gas pipe connection is made, then compensation for normal gas
supply pipe expansion, and radiant tube expansion must be provided. All
piping must conform to local codes.
CAUTION:
CAUTION:
In installations where chlorinated Hydrocarbons are in use, such as Trichloroethylene or
Chloroethylene Nu it is essential that combustion air be brought in from
non-contaminated areas. Burning the fumes from these gases will create Hydrochloric
acid fumes, which are detrimental to humans, equipment and buildings. Typical sources
of other contaminants are paint removers, paints, refrigerants, solvents, adhesives,
degreasers, lubricants, pesticides, etc.
the wall and combustion air is ducted in from
outside to the Burner, it is advisable to create
a trap at the Burner. The trap is created by
dropping the pipe below the level of the tube
(much like a plumbing trap using elbows or a
flexible connector) before connecting it to the
fresh air intake on top of the Burner box, Do
not use flexible dryer hose for air inlet duct,
the corrugated sides of this tubing add too
much restriction to the air flow. A good qual-
ity industry approved insulated flex is al-
lowed.
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