Space-Ray LTU Series User manual

Form #43155010
Sept 2011
INSTALLATION AND OPERATION INSTRUCTIONS
OWNER / INSTALLER: For our safet this manual must be carefull and thoroughl read and
understood before installing, operating or servicing this heater.
INFRARED RADIANT TUBE HEATER
Single Stage Pull Through S stem (Negative Pressure)
Models:
L
T
U
SERIES:
(
80, 90,
100,
110, 120,
125,
130, 140,
150,
160,
175, 180, 200, 225, 250) – N5/L5
L
T
S
SERIES:
(
40, 50,
60,
75,
80, 90,
100,
110, 120,
125,
130,
140, 150, 160, 175, 180, 200, 225, 250) – N5/L5
!
INSTALLER
:
This manual is the propert of the owner. Please present this manual to the
owner when ou leave the job site.
▲WARNING: Improper installation, adjustment, alteration, service, or maintenance can
cause propert damage, injur or death. Read the installation, operation and maintenance
instructions thoroughl before installing or servicing this equipment.
IF YOU SMELL GAS: FOR YOUR SAFETY
FOR YOUR SAFETYFOR YOUR SAFETY
FOR YOUR SAFETY
!
!!
!
DO NOT
DO NOTDO NOT
DO NOT tr to light an appliance.
!
!!
!DO NOT
DO NOTDO NOT
DO NOT touch an electrical switch; DO NOT
DO NOTDO NOT
DO NOT use an
telephone in our building.
!
!!
!IMMEDIATELY
IMMEDIATELYIMMEDIATELY
IMMEDIATELY call our gas supplier from a neighbor's
telephone. Follow the gas supplier's instructions. If ou
cannot reach our gas supplier, call the fire department.
DO NOT
DO NOT DO NOT
DO NOT store or use gasoline or other
store or use gasoline or other store or use gasoline or other
store or use gasoline or other
flammable vapors and liquids in
flammable vapors and liquids in flammable vapors and liquids in
flammable vapors and liquids in the vicinit of
the vicinit of the vicinit of
the vicinit of
this or an other appliance.
this or an other appliance.this or an other appliance.
this or an other appliance.
!IMPORTANT:
!IMPORTANT:!IMPORTANT:
!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.
SAVE THIS MANUAL FOR FUTURE REFERENCE.SAVE THIS MANUAL FOR FUTURE REFERENCE.
SAVE THIS MANUAL FOR FUTURE REFERENCE.
SPACE
SPACESPACE
SPACE-
--
-RAY
RAYRAY
RAY
Post Office Box 36485 (28236) • 305 Doggett Street (28203) • Charlotte, North Carolina
Phone [phone] • Fax [phone] • www.spacera .com • email: info@spacera .com

Form #43155010
Sept 2011 -1-
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1.0) Safet ................................................................................................................................................... 2
2.0) Installer Responsibilit ...................................................................................................................... 2
3.0) General Information........................................................................................................................... 2
4.0) Minimum Clearances to Combustibles ........................................................................................... 4
5.0) T pical Suspension Methods ............................................................................................................ 5
6.0) LTU Series Specifications .................................................................................................................. 6
7.0) LTU Series Packing List ..................................................................................................................... 6
8.0) LTU Series T pical La outs ................................................................................................................ 8
8.1) LTU Series Dimensions ...................................................................................................................... 8
8.2) LTU 80-175 Series Heater Assembl Overview ........................................................................... 10
8.3) LTU 180-250 Series Heater Assembl Overview ......................................................................... 11
8.4) LTU Series 15’ Bod Package Opening ......................................................................................... 11
8.5) LTU 80-130 Series Heater Assembl ............................................................................................ 12
8.6) LTU 125-250 Series – Joining of 5’ and 10’ Bod Sections ...................................................... 15
9.0) LTS Series Specifications ................................................................................................................ 16
10.0) LTS Series Packing List ................................................................................................................... 16
11.0) LTS Series T pical La outs .............................................................................................................. 19
11.1) LTS Series Dimensions .................................................................................................................... 20
11.2) LTS 40-175 Series Heater Assembl Overview ........................................................................... 21
11.3) LTS 180-250 Series Heater Assembl Overview ......................................................................... 22
11.4) LTS Series Heater Assembl ........................................................................................................... 22
11.5) LTS Series - Adding Optional 90º Elbow ....................................................................................... 26
11.6) LTS Series - Adding Optional Corner Reflector ............................................................................ 26
11.7) LTS Series - Attaching Control Box Assembl .............................................................................. 26
11.8) LTS Series - Attaching Draft Inducer Assembl ........................................................................... 27
11.9) LTS Series - Inclined Mounting Instructions ................................................................................. 28
12.0) Accessor Packages ........................................................................................................................ 30
13.0) Multiple Hanging & Draft Inducer Positions ................................................................................ 30
14.0) Gas Connections and Regulations ................................................................................................. 32
15.0) Instructions for Pressure Test Gauge Connection ....................................................................... 34
16.0) Electrical Connections ..................................................................................................................... 35
17.0) Venting ............................................................................................................................................... 39
18.0) Air for Combustion ........................................................................................................................... 43
18.1) Direct Outside Air for Combustion ................................................................................................. 43
19.0) Lighting and Shutdown Instructions .............................................................................................. 45
20.0) Sequence of Operation .................................................................................................................... 45
21.0) Control Component Location .......................................................................................................... 46
22.0) Cleaning and Annual Maintenance ............................................................................................... 47
23.0) Troubleshooting Guide..................................................................................................................... 48
24.0) Replacing Parts ................................................................................................................................ 51
24.1) Removing Spark Electrode ............................................................................................................. 51
24.2) Removing Main Burner and Gas Valve ......................................................................................... 52
24.3) Air Switch Pressure Check .............................................................................................................. 53
24.4) Ignition S stem Checks ................................................................................................................... 53
24.5) Motor and Blower Wheel Check ..................................................................................................... 54
25.0) Installation Data ............................................................................................................................... 54
26.0) Replacement Parts Guide ............................................................................................................... 55
This heater complies with ANSI Z83.20 (current standard) and CSA 2.34. Copies of the National Fuel Gas Code (ANSI
Z223.1-latest edition) are available from the CSA at 8501 East Pleasant Valle Road, Cleveland, Ohio 44131 or 55 Scarsdale
Road, Don Mills, Ontario M3B 2R3. All NFPA codes are available from the National Fire Protection Association, Batter march
Park, Quinc , Massachusetts 02269.

Form #43155010
-2- Sept 2011
1.0) SAFETY
This heater is a self-contained infrared radiant tube heater. Safet information required during installation and
operation of this heater is provided in this manual and the labels on the product. The installation, service and
maintenance of this heater must be performed b a contractor qualified in the installation and service of gas
fired heating equipment.
All personnel in contact with the heater must read and understand all safet information, instructions and labels
before operation. The following s mbols will be used in this manual to indicate important safet information.
Warning
WarningWarning
Warning
instructions must be followed to prevent or avoid hazards which
ma cause serious injur , propert damage or death.
Caution
CautionCaution
Caution
instructions must be followed to prevent incorrect operation or
installation of
the heater which ma cause minor injur or propert
damage.
2.0) INSTALLER RESPONSIBILITY
The installer is responsible for the following:
•
••
•The heater and venting, as well as electrical and gas supplies must be installed in accordance with these
installation instructions and an applicable codes and regulations.
•
••
•Ever heater shall be located with respect to building construction and other equipment so as to permit
access to the heater.
•
••
•Each installer must follow the clearances to combustible materials for the heaters.
•
••
•Install the heater so that the supports and hangers are correctl spaced in accordance with these
instructions. The heater must be supported b materials having a working load limit of at least 115lbs.
•
••
•Suppl the owner with a cop of these Installation and Operation Instructions.
•
••
•Where unvented heaters are used, gravit or mechanical means shall be provided to suppl and exhaust at
least 4 CFM per 1,000 Btu/hr input of installed heaters.
•
••
•Never use the heater as a support for a ladder or other access equipment. Do not hang an thing from the
heater.
•
••
•Suppl all installation materials necessar that are not included with the heater.
•
••
•Check the nameplate to make sure that the burner is correct for the gas t pe in the building and the
installation altitude.
3.0) GENERAL INFORMATION
This heater is a self-contained infrared radiant tube heater for use in locations where flammable gases or vapors
are not generall present (as defined b OSHA acceptable limits) and is intended for the heating of
nonresid
nonresidnonresid
nonresidential
entialential
ential spaces.
For indoor installation onl . Not for use in residential dwellings.
For indoor installation onl . Not for use in residential dwellings.For indoor installation onl . Not for use in residential dwellings.
For indoor installation onl . Not for use in residential dwellings.
INSTALLATION REQUIREMENTS
INSTALLATION REQUIREMENTSINSTALLATION REQUIREMENTS
INSTALLATION REQUIREMENTS
The installation must conform to local building codes or in the absence of local codes, with the National Fuel Gas
Code ANSI Z223.1/NFPA54 or the Natural Gas and Propane Installation Code CSA B149.1. Heaters shall be
installed b a licensed contractor or licensed installer. Clearances to combustibles as outlined in this manual
should alwa s be observed. In areas used for storage of combustible materials where the ma be stacked
below the heater, NFPA54 requires that the installer must post signs that will “specif the maximum permissible
stacking height to maintain the required clearances from the heater to combustibles.”
The higher capacit
The higher capacit The higher capacit
The higher capacit LTS
LTSLTS
LTS/
//
/LTU
LTULTU
LTU 180
180180
180–
––
–250 models generate intense radiant heat.
250 models generate intense radiant heat.250 models generate intense radiant heat.
250 models generate intense radiant heat. Therefore, the minimum
Therefore, the minimum Therefore, the minimum
Therefore, the minimum
recommended mounting height is 18 ft.
recommended mounting height is 18 ft.recommended mounting height is 18 ft.
recommended mounting height is 18 ft. above floor level for the LTS/LTU
above floor level for the LTS/LTUabove floor level for the LTS/LTU
above floor level for the LTS/LTU 180
180180
180-
--
-200 models and 20 ft.
200 models and 20 ft.200 models and 20 ft.
200 models and 20 ft. above floor
above floor above floor
above floor
level for the LTS/LTU
level for the LTS/LTUlevel for the LTS/LTU
level for the LTS/LTU 225
225225
225-
--
-250 models.
250 models.250 models.
250 models. Heaters ma be mounted at various heigh
Heaters ma be mounted at various heighHeaters ma be mounted at various heigh
Heaters ma be mounted at various heights and angles depending on
ts and angles depending on ts and angles depending on
ts and angles depending on
the application.
the application.the application.
the application. If ou have an questions, please consult our local Space
If ou have an questions, please consult our local SpaceIf ou have an questions, please consult our local Space
If ou have an questions, please consult our local Space-
--
-Ra representative.
Ra representative.Ra representative.
Ra representative.
Ever heater shall be located with respect to building construction and other equipment so as to permit access
to the heater. Each installer shall use qualit installation practices when locating the heater and must give
consideration to clearances to combustible materials, vehicles parked below, lights, overhead doors, storage
areas with stacked materials, sprinkler heads, gas and electrical lines and an other possible obstructions or
hazards. Consideration also must be given to service accessibilit .

Form #43155010
Sept 2011 -3-
The heater, when installed in aircraft hangars and public garages, must be installed in accordance with
ANSI/NFPA 409-latest edition (Standard for Aircraft Hangars), ANSI/NFPA 88a-latest edition (Standard for
Parking Structures), and ANSI/NFPA 88b-latest edition (Standard for Repair Garages) with the following
clearances:
a. At least 10 feet above the upper surfaces of wings or engine enclosures of the highest aircraft that ma be
housed in the hangar and at least 8 feet above the floor in shops, offices, and other sections of hangars
communicating with aircraft storage or service areas.
b. At least 8 feet above the floor in public garages. ▲
▲▲
▲WARNING:
WARNING:WARNING:
WARNING: Minimum clearances marked on the heater
must be maintained from vehicles parked below the heater.
(FOR CANADA ONLY)
a.
Installation of this appliance is to be in accordance with latest edition of C
SA B149.1 (Natural Gas and
Propane Installation Code).
b. For installation in public garages or aircraft hangars, the minimum clearances from the bottom of the
infrared heater to the upper surface of the highest aircraft or vehicle shall be 50 percent greater than the
certified minimum clearance, but the clearance shall not be less than 8 feet.
Although these heaters ma be used in man applications other than space heating (e.g., process heating),
Space-Ra will not recognize the warrant for an use other than space heating.
This heater is for Indoor Installation and Covered Patio Installation onl and can be used in either Vented or
Unvented mode. The term Unvented actuall means Indirect Vented. While the products of combustion are
expelled into the building, national codes require ventilation in the building to dilute these products of
combustion. This ventilation ma be provided b gravit or mechanical means.
This heater is not an explosion proof heater.
This heater is not an explosion proof heater.This heater is not an explosion proof heater.
This heater is not an explosion proof heater. Where the possibilit of exposure to volatile and low flash point
materials exists, it could result in propert damage or death. This heater must not be installed in a spra booth
where the heater can operate during the spra ing process. Consult our local fire marshal or insurance compan .
LTS
LTSLTS
LTS Series Onl :
Series Onl :Series Onl :
Series Onl : Since straight tube heaters are alwa s hotter a
Since straight tube heaters are alwa s hotter aSince straight tube heaters are alwa s hotter a
Since straight tube heaters are alwa s hotter at the control end than at the flue terminal end,
t the control end than at the flue terminal end, t the control end than at the flue terminal end,
t the control end than at the flue terminal end,
alwa s observe the minimum recommended mounting heights shown on the specification sheets
alwa s observe the minimum recommended mounting heights shown on the specification sheetsalwa s observe the minimum recommended mounting heights shown on the specification sheets
alwa s observe the minimum recommended mounting heights shown on the specification sheets in Section 9.0)
of this manual. Use U-tube configuration instead of straight tubes for spot or area heating (e.g., where a single
heater is utilized for space heating).
WARM
HOT WARM
WARM
WARM
HOT
High Altitude:
High Altitude:High Altitude:
High Altitude:
Appliances are supplied as standard for altitudes of O to 2,000 feet (0-610 m). High-altitude ratings are obtained
b a change in the orifice size. When ordered for high altitude installations, burners are supplied b the factor
read for high altitude installation. Check the nameplate for altitude before proceeding with the installation. In
Canada the adjustment for altitude is made in accordance with Standard CGA 2.17, Gas-Fired Appliances for Use
at High Altitudes.

Form #43155010
-4- Sept 2011
4.0) MINIMUM CLEARANCES TO COMBUSTIBLES
Failure to do so may result in death, serious injury or
property damage.
Combustible material must be located outside the
clearance dimensions listed.
Minimum clearances to combustibles shall be measured from the outer surfaces as shown in the following
diagram:
End End
Ceiling
Below
Front Rear
45° Angle (Maximum)
* Ceiling
Below
Side Side
Horizontal
MINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLESMINIMUM CLEARANCES TO COMBUSTIBLES
MINIMUM CLEARANCES TO COMBUSTIBLES
Mod
ModMod
Model No.
el No.el No.
el No.
Mounted Horizontall
Mounted HorizontallMounted Horizontall
Mounted Horizontall
Angle Mounted at
Angle Mounted at Angle Mounted at
Angle Mounted at
45º
45º45º
45º
Sides
SidesSides
Sides Ceiling*
Ceiling*Ceiling*
Ceiling* Below
BelowBelow
Below Ends
EndsEnds
Ends 45º Front
45º Front45º Front
45º Front 45º Rear
45º Rear45º Rear
45º Rear
LTS
40
, 50
27”
6”
40”
30”
48”
12”
LTS
6
0
, 75
27”
6”
6
0”
30”
48”
12”
LTS
/
LTU
80, 90
52
”
6”
84
”
30”
52
”
12”
LTS/LTU 100 66” 6” 88” ** 40” 66” 20”
LTS/LTU 110, 120, 125, 130 66” 6” 101” ** 40” 66” 20”
LTS
/
LTU
140,
150
, 160, 175
84”
6”
106” **
48”
84”
24”
LTS
/
LTU
180, 200, 225,
2
5
0
84”
6”
1
32
” **
48”
84”
24”
* When used indirect vented, minimum clearance for CEILING must be: 12” for LTS 40-75 and 18” for LTS/LTU
80-250. If optional corner and U-bend reflectors are not used, the clearance must be 18”.
** Maximum clearance below reduces to 72” once ou are 20 ft. downstream from the control box.
▲WARNING:
▲WARNING:▲WARNING:
▲WARNING: Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
could be seriousl damaged.
could be seriousl damaged.could be seriousl damaged.
could be seriousl damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the
Observe the Minimum Clearances to Combustibles listed in the manual and on the Observe the Minimum Clearances to Combustibles listed in the manual and on the
Observe the Minimum Clearances to Combustibles listed in the manual and on the
heater at all times.
heater at all times.heater at all times.
heater at all times.
NOTE:
NOTE:NOTE:
NOTE:
1.
1. 1.
1. The clearan
The clearanThe clearan
The clearances specified above must be maintained to combustibles and other materials that ma be
ces specified above must be maintained to combustibles and other materials that ma be ces specified above must be maintained to combustibles and other materials that ma be
ces specified above must be maintained to combustibles and other materials that ma be
damaged b temperatures 90ºF above ambient temperature.
damaged b temperatures 90ºF above ambient temperature.damaged b temperatures 90ºF above ambient temperature.
damaged b temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
Clearances to combustibles are posted on the Clearances to combustibles are posted on the
Clearances to combustibles are posted on the
control box.
control box.control box.
control box. In areas used for storage of combustible materials wher
In areas used for storage of combustible materials wherIn areas used for storage of combustible materials wher
In areas used for storage of combustible materials where the ma be stacked below the heater,
e the ma be stacked below the heater, e the ma be stacked below the heater,
e the ma be stacked below the heater,
NFPA54 requires that the installer must post signs that will “specif the maximum permissible stacking height
NFPA54 requires that the installer must post signs that will “specif the maximum permissible stacking height NFPA54 requires that the installer must post signs that will “specif the maximum permissible stacking height
NFPA54 requires that the installer must post signs that will “specif the maximum permissible stacking height
to maintain the required clearances from the heater to combustibles.”
to maintain the required clearances from the heater to combustibles.”to maintain the required clearances from the heater to combustibles.”
to maintain the required clearances from the heater to combustibles.” Space
SpaceSpace
Space-
--
-Ra recommends posting these
Ra recommends posting these Ra recommends posting these
Ra recommends posting these
s
ss
signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibilit .
igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibilit .igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibilit .
igns adjacent to the heater thermostat or other suitable location that will provide enhanced visibilit .
2. The stated clearance to combustibles represents a surface temperature of 90
2. The stated clearance to combustibles represents a surface temperature of 902. The stated clearance to combustibles represents a surface temperature of 90
2. The stated clearance to combustibles represents a surface temperature of 90 ºF
ºFºF
ºF (32
(32(32
(32 ºC) above room
ºC) above room ºC) above room
ºC) above room
temperature. Building materials with a low heat to
temperature. Building materials with a low heat totemperature. Building materials with a low heat to
temperature. Building materials with a low heat tolerance (such as plastics, vin le siding, canvas, tri
lerance (such as plastics, vin le siding, canvas, trilerance (such as plastics, vin le siding, canvas, tri
lerance (such as plastics, vin le siding, canvas, tri-
--
-pl , etc.)
pl , etc.) pl , etc.)
pl , etc.)
ma be subject to degradation at lower temperatures. It is the installer’s responsibilit to assure that adjacent
ma be subject to degradation at lower temperatures. It is the installer’s responsibilit to assure that adjacent ma be subject to degradation at lower temperatures. It is the installer’s responsibilit to assure that adjacent
ma be subject to degradation at lower temperatures. It is the installer’s responsibilit to assure that adjacent
materials are protected from degradation.
materials are protected from degradation.materials are protected from degradation.
materials are protected from degradation.

Form #43155010
Sept 2011 -5-
5.0) TYPICAL SUSPENSION METHODS
Burner must be secured to the mounting flange with nuts.
All materials used to suspend the heater must have a minimum working load
of 115 lbs.
All S Hooks must be crimped closed.
Never use the heater to support a ladder or other access equipment.
Failure to do so may result in death, serious injury or property damage.
SUSPENSION HAZARD
Various means of suspending the heater can be used. See the following drawings for t pical examples.
1. Use onl noncombustible materials for suspending hangers and brackets.
2. A minimum No. 2 chain with a working load limit of 115 lbs. is required.
3. Turnbuckles can be used with chains to allow leveling of the heater. All “S” hooks and e e bolts must be
manuall crimped closed b the installer.
4. When using rigid means for heater suspension (rod, flat bar, etc.) provide sufficient lengths or swing joints to
compensate for expansion. See Figures b and c.
5. Heaters subject to vibration must be provided with vibration isolating hangers.
6. Heaters must not be supported b gas or electric suppl lines and must be suspended from a permanent
structure with adequate load capacit .
Space-Ra recommends that the bod sections be suspended using chains with turnbuckles. This will allow slight
adjustments after assembl and heater expansion/ contraction during operation.
If a “trapeze” method is used for tube support/hanger brackets (shown below), the minimum chain length for the
two connecting chains is 36” to minimize an vibration that might be generated b the draft inducer assembl . If
these chains must be less than 36”, then do not use the trapeze method and, instead, use individual chains on
each tube support/hanger bracket.
36 (91cm) Minimum
36 (91cm) Minimum
36 (91cm) Minimum
36 (91cm) Minimum
a.
Minimum
No. 2 Chain
S-Hook
(typical)
b.
3/16 x 1 wide
Flat Bar
c.
Threaded
Rod
Turnbuckle
Eyebolt Eyebolt
Turnbuckle
Minimum
No. 2 Chain
Eyebolt
d.

Form #43155010
-6- Sept 2011
6.0) LTU SERIES SPECIFICATIONS
Model No.
Model No.Model No.
Model No.
Btu/hr
Btu/hrBtu/hr
Btu/hr
Input
InputInput
Input
Flue Restrictor
Flue Restrictor Flue Restrictor
Flue Restrictor Plate
PlatePlate
Plate
I.D. &
I.D. &I.D. &
I.D. & Part #
Part #Part #
Part #
Orifice Size
Orifice SizeOrifice Size
Orifice Size
Minimum *
Minimum *Minimum *
Minimum *
Mounting Height
Mounting HeightMounting Height
Mounting Height
Natural Gas
Natural GasNatural Gas
Natural Gas Propane Gas
Propane GasPropane Gas
Propane Gas
@
@@
@
Horizontal
HorizontalHorizontal
Horizontal
@
@@
@
45º Angle
45º Angle45º Angle
45º Angle
LTU
80
80,000
1
-
1/2”
#42741
050
#19
(0.166)
#38
(0.102)
13 ft.
12 ft.
LTU
90
90,000
1
-
1/2”
#42741050
#16
(0.177)
#36
(0.106)
13 ft.
12 ft.
LTU 100 100,000 1-5/8” #42741060 #14 (0.182) #33 (0.113) 13 ft. 12 ft.
LTU 110 110,000 1-3/4” #42741070 #10 (0.194) #31 (0.120) 14 ft. 13 ft.
LTU 120 120,000 1-3/4” #42741070 13/64 (0.203) 1/8 (0.125) 14 ft. 13 ft.
LTU
125
125,000
1
-
7/8”
#42741080
#5
(0.20
6
)
#30
(0.129)
14 ft.
13 ft.
LTU 130 130,000 1-7/8” #42741080 #4 (0.209) 3.3mm (0.130) 14 ft. 13 ft.
LTU
140
1
4
0,000
2
-
1/32”
#42741090
5.5
mm
(0.216)
#
29
(0.136
)
15
ft.
14
ft.
LTU 150 150,000 2-1/32” #42741090 5.7mm (0.224) #28 (0.140) 15 ft. 14 ft.
LTU 160 160,000 2-1/4” #42741100 5.8mm (0.228) #27 (0.144) 15 ft. 14 ft.
LTU
175
175,000
2
-
1/4”
#42741100
“C
”
(0.242
)
3.8mm
(0.150
)
15
ft.
14
ft.
LTU
180
1
8
0,000
2
-
1/4”
#42741100
“C”
(0.242)
#
24
(0.152
)
18
ft.
17
ft.
LTU
200
200,000
2
-
3/8”
#42741130
“F”
(0.2
57
)
#21
(0.159
)
18 ft.
17
ft.
LTU
225
225
,000
2
-
1/2”
#42741140
6.9mm
(0.272)
#
18
(0.170
)
20
ft.
19
ft.
LTU
250
25
0,000
2
-
3/4”
#42741150
“K”
(0.281)
4.5mm
(0.177
)
20
ft.
19
ft.
* MOUNT HEATERS AS HIGH AS POSSIBLE. Minimums are shown as a guideline for human comfort and uniform
energ distribution for complete building heating applications. Consult our Space-Ra representative for the
particulars of our installation requirements.
T pe
T peT pe
T pe
Gas
GasGas
Gas
Gas Pipe
Gas PipeGas Pipe
Gas Pipe
Connection
ConnectionConnection
Connection1
11
1
Tube
TubeTube
Tube
Diameter
DiameterDiameter
Diameter
Flue
FlueFlue
Flue
Connection
ConnectionConnection
Connection2
22
2
Fresh Air
Fresh Air Fresh Air
Fresh Air
Connection
ConnectionConnection
Connection
Electrical
ElectricalElectrical
Electrical
Suppl
SupplSuppl
Suppl
Current
CurrentCurrent
Current
Rating
RatingRating
Rating
Natural
or Propane
½” MPT
(Male) 4” 4” Round 6” Round
120 Volt,
60Hz,
1 Phase 2.6 Amp
1 LTU 225 and 250 require a minimum 3/4” nominal ID flexible gas connector.
2 LTU 180-250: 6” round. See Section 17.0) for vent sizes and limitations.
Fuse
FuseFuse
Fuse
Rating:
Rating:Rating:
Rating:
Ignition S stem (direct spark):
Ignition S stem (direct spark):Ignition S stem (direct spark):
Ignition S stem (direct spark):
In
-
line: 2 Amp 250V
(for 24V Circuit) 30 second pre-purge period
7.0) LTU SERIES PACKING LIST
A.
A.A.
A. Control/Draft Induce
Control/Draft InduceControl/Draft Induce
Control/Draft Inducer Package
r Packager Package
r Package
Part Description
Part DescriptionPart Description
Part Description
QTY
QTYQTY
QTY
Control
Box Assembl
................................
................................
................................
..............................
1
Draft Inducer & Junction Box
Assembl
................................
................................
................................
1
Flue Restrictor Plate (See Section
6.0)
for
plate I.D. and part no.)
................................
...................
1
4”
x
6
”
Starting
Collar
1
(#
4289200
9
)
Supplied with
LTU
180
-
250
................................
.................
1
Control Fastener Kit
(#42907
0
1
0)
................................
................................
................................
.......
1
Containing:
#
8
-
32
Screws
& Nuts
(
#02166010 &
#021
2703
0)
................................
..........
2
¼
-
20 Locknuts (#02167010)
................................
................................
..............
6
Tube Flange Gasket
(#
42921000)
................................
................................
................................
......
2
Installation & Operation Instructions
(#43
155010
)
................................
................................
..........
1
Gas connector
,
5/8” OD x 36” (#30302360)
2
................................
................................
...................
1
1 4-inch Starting Collar (#40504020) supplied with LTU 80-175 models.
2 LTU 225 and 250 models using Gas Connector, 1” OD x 36” (#30302361)

Form #43155010
Sept 2011 -7-
LTU 80
LTU 80LTU 80
LTU 80-
--
-250
250 250
250 CONTROL/DRAFT INDUCER
CONTROL/DRAFT INDUCERCONTROL/DRAFT INDUCER
CONTROL/DRAFT INDUCER PACKAGE NUMB
PACKAGE NUMBPACKAGE NUMB
PACKAGE NUMBERS
ERSERS
ERS
NATURAL GAS
NATURAL GASNATURAL GAS
NATURAL GAS PROPANE GAS
PROPANE GASPROPANE GAS
PROPANE GAS
MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO.
LTU 80-N5................. #42883010 LTU 150-N5 ..............#42883210 LTU 80-L5................. #42883020 LTU 150-L5 .............. #42883220
LTU 90-N5................. #42883030 LTU 160-N5 ..............#42883230 LTU 90-L5................. #42883040 LTU 160-L5 .............. #42883240
LTU 100-N5 .............. #42883050 LTU 175-N5 ..............#42883250 LTU 100-L5 .............. #42883060 LTU 175-L5 .............. #42883260
LTU 110-N5 .............. #42883070 LTU 180-N5 ..............#42883270 LTU 110-L5 .............. #42883080 LTU 180-L5 .............. #42883280
LTU 120-N5 .............. #42883090 LTU 200-N5 ..............#42883290 LTU 120-L5 .............. #42883100 LTU 200-L5 .............. #42883300
LTU 125-N5 .............. #42883110 LTU 225-N5 ..............#42883310 LTU 125-L5 .............. #42883120 LTU 225-L5 .............. #42883320
LTU 130-N5 .............. #42883130 LTU 250-N5 ..............#42883330 LTU 130-L5 .............. #42883140 LTU 250-L5 .............. #42883340
LTU 140-N5 .............. #42883190 LTU 140-L5 .............. #42883200
B.
B.B.
B. LTU
LTULTU
LTU 8
88
80
00
0-
--
-250
250250
250 Bod Package Descriptions
Bod Package DescriptionsBod Package Descriptions
Bod Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
S stem Lengths
S stem LengthsS stem Lengths
S stem Lengths
Ft.
Ft.Ft.
Ft.
15’ Bod Pkg.
15’ Bod Pkg. 15’ Bod Pkg.
15’ Bod Pkg.
42881000
4288100042881000
42881000
5’ Bod Pkg.
5’ Bod Pkg. 5’ Bod Pkg.
5’ Bod Pkg.
42882000
4288200042882000
42882000
10’ Bod Pkg.
10’ Bod Pkg. 10’ Bod Pkg.
10’ Bod Pkg.
42882020
4288202042882020
42882020
10’ Bod Pkg
10’ Bod Pkg10’ Bod Pkg
10’ Bod Pkg
.
. .
.
42882030
4288203042882030
42882030
Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt .
30’ 1 - - -
40’ 1 1 - -
50’ * 1 - 1 -
50’ ** 1 - - 1
* for LTU 180-200 Models Onl ; ** for LTU 225-250 Models Onl
LTU Bod Package Components
LTU Bod Package ComponentsLTU Bod Package Components
LTU Bod Package Components
15’ Pkg.
15’ Pkg.15’ Pkg.
15’ Pkg.
42881000
4288100042881000
42881000
5’ Pkg.
5’ Pkg.5’ Pkg.
5’ Pkg.
42882000
4288200042882000
42882000
10’ Pkg.
10’ Pkg.10’ Pkg.
10’ Pkg.
42882020
4288202042882020
42882020
10’ Pkg.
10’ Pkg.10’ Pkg.
10’ Pkg.
42882030
4288203042882030
42882030
P
PP
Part #
art #art #
art # Component Description
Component DescriptionComponent Description
Component Description Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt .
42914000
Pre-assembled 15’ ALC Steel U-Tube
(two 24-hole flanges) with reflector 1 - - -
42915000
Pre-assembled 5’ ALC Steel Tube
(two 24-hole flanges) with reflector - 1 - -
42915020
Pre-assembled 10’ ALC Steel Tube
(24-hole flanges) with reflector - - 1 -
42915030
Pre
-
assembled with reflector, one 10’ ATC Steel
Tube (6-hole flanges) and one 10’ ALC Steel Tube
(24-hole flanges)
- - - 1
42895000 Control End Reflector 1 - - -
42896000 Foot End Reflector 1 - - -
42907020
Bod Fastener Kit, Containing:
#02167010, ¼-20 Locknuts (QTY = 12)
#02259000, ¼-20 Machine Screws (QTY = 12)
#02125130, #10-24x1/2” Screws (QTY = 4
#02189020, #10-16x1/2” Screws (QTY = 2)
#02266010, Speed Clips (QTY = 2)
#42769010, Sliding Clamps (QTY = 4)
#42921000, Tube Flange Gaskets (QTY = 2)
- 1 1 1
42907030
Bod Fastener Kit, Containing:
#02125130, #10-24x1/2” Screws (QTY = 6
#02189020, #10-16x1/2” Screws (QTY = 2)
#02266010, Speed Clips (QTY = 20)
#42769010, Sliding Clamps (QTY = 6)
1 - - -

Form #43155010
-8- Sept 2011
8.0) LTU SERIES TYPICAL LAYOUTS
30 FT.
SYSTEM 40 FT. SYSTEM 50 FT. SYSTEM
Control Unit
Draft Inducer Unit
15 FT. Body Section
10 Ft. Body Section
5 FT. Body Section
180 Deg. U-Bend
LEGEND
EMITTER
EMITTER EMITTER
EMITTER
LENGTH
LENGTHLENGTH
LENGTH MODEL
MODELMODEL
MODEL
30’ LTU 80, 90, 100, 110, 120, 125, 130
40’ LTU 125, 130, 140, 150, 160, 175
50’ LTU 180, 200, 225, 250
NOTES:
NOTES:NOTES:
NOTES:
1. In all configurations, the control unit must be connected directl to either a) the 24-hole flange of the
aluminized steel bod section (for LTU 80-200 models) or b) the 6-hole flange of the 10 ft. alumi-therm steel
bod section (for LTU 225 and 250 models).
2. Failure to attach
Failure to attachFailure to attach
Failure to attach the control box to the 6
the control box to the 6the control box to the 6
the control box to the 6-
--
-hole flange for
hole flange for hole flange for
hole flange for LTU
LTULTU
LTU 225
225225
225-
--
-250 as indicated above will void the
250 as indicated above will void the 250 as indicated above will void the
250 as indicated above will void the
manufacturer’s warrant .
manufacturer’s warrant .manufacturer’s warrant .
manufacturer’s warrant .
8.1) LTU SERIES DIMENSIONS
18
(46cm)
5 1/2
(14cm)
92
(234cm)
210 1/2
(535cm)
84
(213cm)
11
(28cm)
12
(30cm) 28
(71cm)
Bottom View
Tube Support /
Hanger Bracket (QTY-3) Reflector
Emitter Tube
15 Ft. Body Section
Draft Inducer
Control
Box
Models:
Models: Models:
Models:
LTU
LTULTU
LTU
80
8080
80
-
--
-
130
130130
130
18
(46cm)
5 1/2
(14cm) 48
(122cm)
12
(30cm)
270 1/2
(687cm)
92
(234cm) 84
(213cm)
11
(28cm)
28
(71cm)
12
(30cm)
Tube Support/Hanger Bracket
(QTY-5)
Emitter Tube
5 Ft. Body Section 15 Ft. Body Section
Bottom View
Draft Inducer
Control
Box
Reflector
Models:
Models: Models:
Models:
LTU
LTULTU
LTU
125
125125
125
-
--
-
175
175175
175

Form #43155010
Sept 2011 -9-
12
(30cm)
18
(46cm)
5 1/2
(14cm)
108
(275cm) 92
(234cm)
330 1/2
(839cm)
84
(213cm)
11
(28cm)
28
(71cm)
12
(30cm)
Bottom View
10 Ft. Body Section 15 Ft. Body Section
Control
Box
Draft Inducer Emitter Tube Tube Support/Hanger Bracket
(QTY-5) Reflector
Models:
Models: Models:
Models:
LTU
LTULTU
LTU
180
180180
180
-
--
-
2
22
2
5
55
5
0
00
0
End View
7
(18cm)
10-7/8
(28cm)
10-9/16
(27cm)
8-1/2
(22cm)
Optional
Fresh Air Inlet
15-5/8
(40cm)
8-1/2
(22cm)
Sight
Glass
1/2 MPT Gas
Connection
Junction Box
(electric supply)
Draft
Inducer Control
Box

Form #43155010
-10- Sept 2011
8.2) LTU 80-175 SERIES HEATER ASSEMBLY OVERVIEW
Typical Assembly Overview
(LTU175-40 Shown)
Tube Flange 24 Hole for 80-200M BTU units only 6 Hole for 225-250M BTU units only
5-1/2
(control box
to chain)
Draft Inducer Assembly
28 Tube Support Brk. with U-Bolt Clamp & 5/16" Hex Nuts
Gasket
Control Box
Restrictor Plate
Typical Overlap
Reflector
U-Bend
Control End Reflector
Foot End Reflector
48
12
92
84
11
3 (control box to reflector)
2 overlap
1 overlap

Form #43155010
Sept 2011 -11-
8.3) LTU 180-250 SERIES HEATER ASSEMBLY OVERVIEW
Draft Inducer
Control Box
Aluminized Calorized Steel Tube (ALC)
(with two 24-hole Flanges)
U-Bend
Aluminized Calorized Steel Tube (ALC)
(with one 24-hole Flange)
10 FT. BODY PACKAGE
Part No. 42882020 15 FT. BODY PACKAGE
Part No. 42881000
Tube Support/
Hanger Bracket
Models:
Models: Models:
Models:
LTU
LTULTU
LTU
180
180180
180
-
--
-
2
22
2
0
00
0
0
00
0
Alumi-Therm Calorized Steel Tube (ATC)
(with two 6-hole Flanges)
Draft Inducer
*Control Box
Aluminized Calorized Steel Tube (ALC)
(with two 24-hole Flanges) *IMPORTANT
FOR MODELS LTU 225-250. THE CONTROL BOX MUST
BE ATTACHED TO AN ALUMI-THERM STEEL TUBE
HAVING 6-HOLE FLANGES.
10FT. BODY PACKAGE
Part No. 42882030 15 FT. BODY PACKAGE
Part No. 42881000
Models:
Models: Models:
Models:
LTU
LTULTU
LTU
225
225225
225
-
--
-
2
22
2
5
55
5
0
00
0
8.4) LTU SERIES 15’ BODY PACKAGE OPENING
Follow the procedure below to open the 15’ bod package.
1. Remove end reflectors from packaging.
2. Lift the tube at the flange end, then slide tube support/hanger bracket between marks on tubes and tighten
the “U” bolt hex nuts. Follow instructions in Sections 8.5) and 8.6) for the field assembl of the heater.
92 reference
Remove end reflectors
from packaging. Slide tube support/hanger bracket between
marks on tubes and tighten the U bolt
hex nuts.
12Lift this end.
6
reference
84 reference

Form #43155010
-12- Sept 2011
8.5) LTU 80-130 SERIES HEATER ASSEMBLY
Sheet metal parts, particularly reflectors and vent have sharp
edges. Always use gloves when handling.
Failure to do so may result in death, serious injury or property
damage.
CUT HAZARD
During field assembl of the heater, the recommended procedure is as follows:
1. Install the suspension (according to Section 8.1) using proper suspension method (see Section 5.0).
1
1
1
92
84
chains for suspension
on the control box end
92
84
Suspension
Chain
28
1
28
28
Trapeze Method
Trapeze MethodTrapeze Method
Trapeze Method Individual Suspension Method
Individual Suspension MethodIndividual Suspension Method
Individual Suspension Method
2. Lift the bod section and suspend it into place. When lifting, caution should be used to avoid damaging the
assembl . Make sure that the long axis of heater is level.
2
2
2
2
2
2
Tube Flange
Level indicator
The long axis
of heater Side View

Form #43155010
Sept 2011 -13-
3. Assembl the reflectors onto the bod section. Leave 3” space between the tube flange and the first
reflector for later mounting of control box and draft inducer.
4. Place the flanges of the control end reflector flush with the end of the first reflector. Secure b sliding speed
clips onto reflector edges. Evenl space 6 speed clips on sides and top of reflectors to provide a snug fit.
Place foot end reflector on the opposite end of the reflector and secure as above.
Tube Flange
Side View
Suspension
chain
reflector
3
4
3
3
4
Speed
Clip 3
5. Attach the control box to the right-hand control tube flange and secure with 1/4-20 locknuts. The control box
must be mounted with the perforated fresh air plate on top, facing the ceiling.
6. Attach the draft inducer assembl to the left-hand draft inducer tube flange and secure with 1/4-20 locknuts.
A flue restrictor plate is attached to the draft inducer weld studs. Make sure this remains in place while the
draft inducer is being attached to the heater bod .
1/4-20
Locknuts
Tube Flange
(control)
Gasket
Access
Panel
Control Box
Draft Inducer
(vertical position)
Flue Restrictor
Plate
Do Not Discard.
Gasket
6
Tube Flange
(draft inducer)
5

Form #43155010
-14- Sept 2011
7. Insert SJO cable through the strain relief bushing of the control box and connect to L1 and L2 of terminal
block. Refer also to the wiring diagram in Section16.0).
3/8 Connector
SJO Cable
(wire leads to L1 and L2
of the control terminal block)
7
8. Reflectors should overlap 1” to 3” and must be secured b sliding speed clips on the reflector edges. One
speed clip is required for each side of the reflector.
9. Fasten the first reflector to the tube support/hanger bracket with (2) #10 sheet metal screws according to
Detail “A”. Mount the sliding reflector clamps (#42769010) per Reflector Clamp Installation (Detail “B”) on
all tube support/hanger brackets. Make sure the reflector can slide under the clamp during heater operation.
The reflector clamps MUST be installed per reflector
The reflector clamps MUST be installed per reflector The reflector clamps MUST be installed per reflector
The reflector clamps MUST be installed per reflector
clamp installation detail which allows the reflector to
clamp installation detail which allows the reflector to clamp installation detail which allows the reflector to
clamp installation detail which allows the reflector to
slide under the clamp during heater operation.
slide under the clamp during heater operation.slide under the clamp during heater operation.
slide under the clamp during heater operation.
9
9
8
9
9
9
9
Tube Support &
Hanger Bracket
Reflector
Clamp
Reflector Clamp
Screw
Reflector Clamp Installation
DETAIL B
DETAIL A
Fasten screws to tube
hanger/support bracket and reflector
(only the tube support/hanger
bracket closest to the control end)
#10 x 1/2 SHEET METAL
SCREWS (QTY - 2)
See Detail A & B
See Detail B
See Detail B
LTU(80-130) - 30 FT System Shown
2 overlap
3
(control box to reflector)
Do not relocate
Do not relocateDo not relocate
Do not relocate
the tube support/hanger bracket at the control box end of
the tube support/hanger bracket at the control box end of the tube support/hanger bracket at the control box end of
the tube support/hanger bracket at the control box end of
the heater. This will increase the weight on the emitter tube and can result
the heater. This will increase the weight on the emitter tube and can result the heater. This will increase the weight on the emitter tube and can result
the heater. This will increase the weight on the emitter tube and can result
in premature tube failure.
in premature tube failure.in premature tube failure.
in premature tube failure.

Form #43155010
Sept 2011 -15-
3
(control box to reflector) See Detail A & B
98
2 overlap
9
9
9
9
9
9
8
9
9
9
1 overlap
See Detail B
See Detail B
LTU(125-175) - 40 FT System Shown
3
(control box to reflector)
See Detail A & B
9
8
2 overlap
9
9
9
9
9
9
8
9
9
9
1 overlap
See Detail B
See Detail B
LTU(180-250) - 50 FT System Shown
DETAIL A
Fasten screws to tube
hanger/support bracket and reflector
(only the tube support/hanger
bracket closest to the control end)
#10 x 1/2 SHEET METAL
SCREWS (QTY - 2)
Tube Support &
Hanger Bracket
Reflector
Clamp
Reflector Clamp
Screw
Reflector Clamp Installation
DETAIL B
8.6) LTU 125-250 SERIES – JOINING OF 5’ AND 10’ BODY SECTIONS
These models require the use of an additional 5’ bod section for LTU 125-175 and 10’ bod section for LTU 180-
250, as shown in Section 8.1). Follow the instruction below for joining these sections.
1. Join the tube flanges of the bod sections together with gaskets in between. Secure the flanges with the ¼-
20 screws and locknuts provided.
2. Assemble the control box, draft inducer, and other components as previousl described in the heater
assembl instructions.
Tube Flange Gasket
(QTY-1 per flange)
5FT Body Section LTU (125-175)-40
10FT Body Section LTU (180-250)-50
15FT Main
Body Section
1/4-20 Screw & Locknut
(QTY-3 per flange)
Tube Flange
(tightening sequence)
1
35
4
2
6

Form #43155010
-16- Sept 2011
9.0) LTS SERIES SPECIFICATIONS
Model No.
Model No.Model No.
Model No.
Btu/hr
Btu/hrBtu/hr
Btu/hr
Input
InputInput
Input
Flue Restrictor
Flue Restrictor Flue Restrictor
Flue Restrictor Plate
PlatePlate
Plate
I.D. &
I.D. & I.D. &
I.D. & Part #
Part #Part #
Part #
Orifice Size
Orifice SizeOrifice Size
Orifice Size
Minimum *
Minimum *Minimum *
Minimum *
Mounting Height
Mounting HeightMounting Height
Mounting Height
Natural Gas
Natural GasNatural Gas
Natural Gas Propane Gas
Propane GasPropane Gas
Propane Gas
@
@@
@
Horizontal
HorizontalHorizontal
Horizontal
@
@@
@
45º Angle
45º Angle45º Angle
45º Angle
LTS 40
40,000
1”
#
42741040
#3
1
(0.1
20
)
#49
(0.073)
10 ft.
9 ft.
LTS 50
50,000
1
-
1/8”
#4
2741030
3.
3
mm
(0.13
0
)
#
46
(0.081)
11 ft.
10 ft.
LTS 60
6
0,000
1
-
7/32”
#4
2741020
#27
(0.1
44
)
#
4
3
(0.08
9
)
1
2
ft.
1
1
ft.
LTS 75
75,000
1
-
7/16”
#4
2741010
#
20
(0.161)
#39
(0.099)
13 ft.
12 ft.
LTS 80
80,000
1
-
1/2”
#42741050
#19
(0.166)
#38
(0.102)
13 ft.
12 ft.
LTS 90
90,000
1
-
1/2”
#427410
50
#16
(0.177)
#36
(0.106)
13 ft.
12 ft.
LTS 100 100,000 1-5/8” #42741060 #14 (0.182) #33 (0.113) 13 ft. 12 ft.
LTS 110 110,000 1-3/4” #42741070 #10 (0.194) #31 (0.120) 14 ft. 13 ft.
LTS 120 120,000 1-3/4” #42741070 13/64 (0.203) 1/8 (0.125) 14 ft. 13 ft.
LTS 125 125,000 1-7/8” #42741080 #5 (0.206) #30 (0.129) 14 ft. 13 ft.
LTS 130 130,000 1-7/8” #42741080 #4 (0.209) 3.3mm (0.130) 14 ft. 13 ft.
LTS 140 140,000 2-1/32” #42741090 5.5mm (0.216) #29 (0.136) 15 ft. 14 ft.
LTS 150 150,000 2-1/32” #42741090 5.7mm (0.224) #28 (0.140) 15 ft. 14 ft.
LTS 160 160,000 2-1/4” #42741100 5.8mm (0.228) #27 (0.144) 15 ft. 14 ft.
LTS 175
175,000
2
-
1/4”
#42741100
“C
”
(0.242
)
3.8mm
(0.150
)
15
ft.
14
ft.
LTS 180
1
8
0,000
2
-
1/4”
#42741100
“C”
(0.242)
#24
(0.152)
18 ft.
17
ft.
LTS 200
200,000
2
-
3/8”
#42741130
“F”
(0.2
57
)
#21
(0.159
)
18 ft.
17
ft.
LTS 225
225
,000
2
-
1/2”
#42741140
6.9mm
(0.272)
#18
(0.170)
20 ft.
19 ft.
LTS 250
25
0,000
2
-
3/4”
#42741150
“K”
(0.281)
4.5mm
(0.177)
20 ft.
19 ft.
* MOUNT HEATERS AS HIGH AS POSSIBLE. Minimums are shown as a guideline for human comfort and uniform
energ distribution for complete building heating applications. Consult our Space-Ra representative for the
particulars of our installation requirements.
T pe
T peT pe
T pe
Gas
GasGas
Gas
Gas Pipe
Gas PipeGas Pipe
Gas Pipe
Connection
ConnectionConnection
Connection1
11
1
Tube
TubeTube
Tube
Diameter
DiameterDiameter
Diameter
Flue
FlueFlue
Flue
Connection
ConnectionConnection
Connection2
22
2
Fresh Air
Fresh Air Fresh Air
Fresh Air
Connection
ConnectionConnection
Connection
Electrical
ElectricalElectrical
Electrical
Suppl
SupplSuppl
Suppl
Current
CurrentCurrent
Current
Rating
RatingRating
Rating
Natural
or Propane
½” MPT
(Male) 4” 4” Round 6” Round
120 Volt,
60Hz,
1 Phase 2.6 Amp
1 LTS 225 and 250 require a minimum 3/4” nominal ID flexible gas connector.
2 LTS 180-250: 6” round. See Section 17.0) for vent sizes and limitations.
Fuse
FuseFuse
Fuse
Rating:
Rating:Rating:
Rating:
Ignition S stem (direct spark):
Ignition S stem (direct spark):Ignition S stem (direct spark):
Ignition S stem (direct spark):
In
-
line: 2 Amp 250V
(for 24V Circuit) 30 second pre-purge period
10.0) LTS SERIES PACKING LIST
A.
A.A.
A. Contr
ContrContr
Control/Draft Inducer Package
ol/Draft Inducer Packageol/Draft Inducer Package
ol/Draft Inducer Package
Part Description
Part DescriptionPart Description
Part Description
QTY
QTYQTY
QTY
Control Box Assembl
................................
................................
................................
..............................
1
Draft Inducer & Junction Box
Assembl
................................
................................
................................
1
Flue Restrictor Plate (See Section
9.0)
for plate I.D. and part no.)
................................
...................
1
4”
x
6
”
Starting
Collar
1
(#
42892009
)
Suppl
ied with LTS 180
-
250
................................
.................
1
Control Fastener Kit
(#42907
01
0)
................................
................................
................................
.......
1
Containing:
#
8
-
32
Screws
& Nuts
(
#02166010 &
#021
2703
0)
................................
..........
2
¼
-
20 Locknuts (#02167010)
................................
................................
..............
6
Tube Flange Gasket
(#42921000)
................................
................................
................................
......
2
Installation & Operation Instructions
(#43155010)
................................
................................
..........
1
Ga
s connector
,
5/8” OD x 36” (#30302360)
2
................................
................................
...................
1
1 4-inch Starting Collar (#40504020) supplied with LTS 40-175 models.
2 LTS 225 and 250 models using Gas Connector, 1” OD x 36” (#30302361)

Form #43155010
Sept 2011 -17-
LTS SERIES
LTS SERIES LTS SERIES
LTS SERIES CONTROL/DRAFT INDUCER
CONTROL/DRAFT INDUCERCONTROL/DRAFT INDUCER
CONTROL/DRAFT INDUCER PACKAGE NUMBERS
PACKAGE NUMBERSPACKAGE NUMBERS
PACKAGE NUMBERS
NATURAL GAS
NATURAL GASNATURAL GAS
NATURAL GAS PROPA
PROPAPROPA
PROPANE GAS
NE GASNE GAS
NE GAS
MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO. MODEL NO.
MODEL NO. MODEL NO.
MODEL NO. PART NO.
PART NO.PART NO.
PART NO.
LTS 40-N5 ................. #43187010 LTS 130-N5 ..............#42883130 LTS 40-L5 ................. #43187020 LTS 130-L5 .............. #42883140
LTS 50-N5 ................. #43187030 LTS 140-N5 ..............#42883190 LTS 50-L5 ................. #43187040 LTS 140-L5 .............. #42883200
LTS 60-N5 ................. #43187050 LTS 150-N5 ..............#42883210 LTS 60-L5 ................. #43187060 LTS 150-L5 .............. #42883220
LTS 75-N5 ................. #43187070 LTS 160-N5 ..............#42883230 LTS 75-L5 ................. #43187080 LTS 160-L5 .............. #42883240
LTS 80-N5 ................. #42883010 LTS 175-N5 ..............#42883250 LTS 80-L5 ................. #42883020 LTS 175-L5 .............. #42883260
LTS 90-N5 ................. #42883030 LTS 180-N5 ..............#42883270 LTS 90-L5 ................. #42883040 LTS 180-L5 .............. #42883280
LTS 100-N5 .............. #42883050 LTS 200-N5 ..............#42883290 LTS 100-L5 .............. #42883060 LTS 200-L5 .............. #42883300
LTS 110-N5 .............. #42883070 LTS 225-N5 ..............#42883310 LTS 110-L5 .............. #42883080 LTS 225-L5 .............. #42883320
LTS 120-N5 .............. #42883090 LTS 250-N5 ..............#42883330 LTS 120-L5 .............. #42883100 LTS 250-L5 .............. #42883340
LTS 125-N5 .............. #42883110 LTS 125-L5 .............. #42883120
B.
B.B.
B. LTS
LTSLTS
LTS 40
4040
40-
--
-200
200200
200 Bod Package Descriptions
Bod Package DescriptionsBod Package Descriptions
Bod Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
S stem L
S stem LS stem L
S stem Lengths
engthsengths
engths
10’ Bod Pkg.
10’ Bod Pkg. 10’ Bod Pkg.
10’ Bod Pkg.
43337040
4333704043337040
43337040
10’ Extension Bod Pkg.
10’ Extension Bod Pkg. 10’ Extension Bod Pkg.
10’ Extension Bod Pkg.
43337010
4333701043337010
43337010
5’ Ending Bod Pkg.
5’ Ending Bod Pkg. 5’ Ending Bod Pkg.
5’ Ending Bod Pkg.
43336030
4333603043336030
43336030
Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt .
15’ 1 - 1
20’ 2 - -
25’ 1 1 1
30’ 2 1 -
35’ 1 2 1
40’ 2 2 -
45’ 1 3 1
50’ 2 3 -
55’ 1 4 1
60’ 2 4 -
65’ 1 5 1
70’ 2 5 -
75’ 1 6 1
80’ 2 6 -

Form #43155010
-18- Sept 2011
C.
C.C.
C. LTS
LTSLTS
LTS 225
225225
225-
--
-2
22
250 Bod Package Descriptions
50 Bod Package Descriptions50 Bod Package Descriptions
50 Bod Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
S stem
S stem S stem
S stem
Lengths
LengthsLengths
Lengths
10’ Starting Bod Pkg.
10’ Starting Bod Pkg. 10’ Starting Bod Pkg.
10’ Starting Bod Pkg.
43337050
4333705043337050
43337050
10’ Start/End Bod Pkg.
10’ Start/End Bod Pkg. 10’ Start/End Bod Pkg.
10’ Start/End Bod Pkg.
43337040
4333704043337040
43337040
10’ Extension Bod Pkg.
10’ Extension Bod Pkg. 10’ Extension Bod Pkg.
10’ Extension Bod Pkg.
43337010
4333701043337010
43337010
5’ Ending Bod
5’ Ending Bod5’ Ending Bod
5’ Ending Bod Pkg.
Pkg. Pkg.
Pkg.
43336030
4333603043336030
43336030
Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt .
50’ 1 2 2 -
55’ 1 1 3 1
60’ 1 2 3 -
65’ 1 1 4 1
70’ 1 2 4 -
75’ 1 1 5 1
80’ 1 2 5 -
Components of LTS bod packages are listed as follows.
LTS Bod Package Components
LTS Bod Package ComponentsLTS Bod Package Components
LTS Bod Package Components
10’ Pkg.
10’ Pkg.10’ Pkg.
10’ Pkg.
43337040
4333704043337040
43337040
10’ Pkg.
10’ Pkg.10’ Pkg.
10’ Pkg.
43337010
4333701043337010
43337010
5’ Pkg
5’ Pkg5’ Pkg
5’ Pkg.
..
.
43336030
4333603043336030
43336030
10’ Pkg.
10’ Pkg.10’ Pkg.
10’ Pkg.
43337050
4333705043337050
43337050
Part #
Part #Part #
Part # Component Description
Component DescriptionComponent Description
Component Description Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt . Qt .
Qt .Qt .
Qt .
43182060
Pre-assembled 10’ ALC Steel Tube
(one 24-hole flange) with reflector 1 - - -
43182040
Pre-assembled 10’ ALC Steel Tube
(no flange) with reflector - 1 - -
43181050
Pre-assembled 5’ ALC Steel Tube
(one 24-hole flange) with reflector - - 1 -
43182023
Pre-assembled 10’ ATC Steel Tube
(two 6-hole flanges) with reflector - - - 1
30462980 Tube Coupling 1 1 1 -
43320000 End Reflector 1 - 1 1
42907140
Reflector/Coupling Fa
stener Kit, Containing:
#02189020, #10-16x1/2” Screws (QTY = 4)
#02266010, Speed Clips (QTY = 6)
#02125130, #10-24x1/2” Screws (QTY = 4)
#42769010, Sliding Clamps (QTY = 4)
1 1 1 -
42907180
Bod
Fastener Kit, Containing:
#02189020, #10-16x1/2” Screws (QTY = 2)
#02266010, Speed Clips (QTY = 4)
#02125130, #10-24x1/2” Screws (QTY = 4)
#42769010, Sliding Clamps (QTY = 4)
#02167010, ¼-20 Locknut (QTY = 6)
#02259000, ¼-20x5/8” Screws (QTY = 6)
#42921000, Tube Flange Gasket (QTY = 1)
- - - 1

Form #43155010
Sept 2011 -19-
11.0) LTS SERIES TYPICAL LAYOUTS
Control Unit
Draft Inducer Unit
10 FT. Body Section
30 FT.
SYSTEM
40 FT.
SYSTEM
20 FT.
SYSTEM
50 FT.
SYSTEM
60 FT.
SYSTEM
70 FT.
SYSTEM
15FT.
SYSTEM
5 FT. Body Section
90 Deg. Elbow
LEGEND
80 FT.
SYSTEM
NOTES:
NOTES:NOTES:
NOTES:
1. In all configurations, the control unit must be connected directl to either a) the 24-hole flange of the 10 ft.
aluminized steel start/end bod section (for LTS 40-200 models) or b) the 6-hole flange of the 10 ft. alumi-
therm steel starting bod section (for LTS 225 and 250 models). Failure to attach the control box to the 6
Failure to attach the control box to the 6Failure to attach the control box to the 6
Failure to attach the control box to the 6-
--
-
hole flange for
hole flange for hole flange for
hole flange for LTS
LTSLTS
LTS 225
225225
225-
--
-250 as indicated above will void the manufacturer’s warrant .
250 as indicated above will void the manufacturer’s warrant .250 as indicated above will void the manufacturer’s warrant .
250 as indicated above will void the manufacturer’s warrant .
2. Joining of two 90º elbows directl together to form a “Z” shape IS NOT
IS NOTIS NOT
IS NOT permitted.
3. 5 Ft. Bod Packages ma be utilized on an of these heaters to ield heater lengths from 15 ft. to 80 ft.
4. An configuration of components not shown in the illustrations ma be used except as noted in 1 and 2
above.
MODEL
MODELMODEL
MODEL
EMITTER LENGTH
EMITTER LENGTHEMITTER LENGTH
EMITTER LENGTH
MODEL
MODELMODEL
MODEL
EMITTER LENGTH
EMITTER LENGTHEMITTER LENGTH
EMITTER LENGTH
Min.
Min.Min.
Min.
Max.
Max.Max.
Max.
Min.
Min.Min.
Min.
Max.
Max.Max.
Max.
LTS
40
1
5
Ft
.
20 Ft.
LTS
130
30 Ft.
50 Ft.
LTS
50
15 Ft.
30 Ft.
LTS
140
40
Ft.
5
0 Ft.
LTS
60
20 Ft.
30 Ft.
LTS
150
4
0 Ft.
5
0 Ft.
LTS
75
20 Ft.
30 Ft.
LTS
160
4
0 Ft.
5
0 Ft
.
LTS
80
30 Ft.
40 Ft.
LTS
175
4
0 Ft.
5
0 Ft.
LTS
90
30 Ft.
40 Ft.
LTS
180
5
0 Ft.
8
0 Ft.
LTS
100
30 Ft.
40 Ft.
LTS
200
5
0 Ft.
8
0 Ft.
LTS
110
30 Ft.
40 Ft.
LTS
225
5
0 Ft.
8
0 Ft.
LTS
120
30 Ft.
40 Ft.
LTS
25
0
5
0 Ft.
8
0 Ft.
LTS
125
30 Ft.
5
0 Ft.