Space-Ray LTU Series User manual

Form #43155040
May 2013
INSTALLATION AND OPERATION INSTRUCTIONS
OWNER / INSTALLER: For yo r safety this man al m st be caref lly and thoro ghly read and
nderstood before installing, operating or servicing this heater.
INFRARED RADIANT TUBE HEATER
Two Stage P ll Thro gh System (Negative Press re)
Models:
L
T
U
SERIES:
(
80, 90,
100,
110, 120,
125,
130, 140,
150,
160,
175, 180, 200, 225, 250) – N7/L7
L
T
S
SERIES:
(
40, 50,
60,
75,
80, 90,
100,
110, 120,
125,
130,
140, 150, 160, 175, 180, 200, 225, 250) – N7/L7
!
INS
TALLER
:
This man al is the property of the owner. Please present this man al to the
owner when yo leave the job site.
▲WARNING: Improper installation, adj stment, alteration, service, or maintenance can
ca se property damage, inj ry or death. Read the installation, operation and maintenance
instr ctions thoro ghly before installing or servicing this eq ipment.
IF YOU SMELL GAS: FOR YOUR SAFETY
FOR YOUR SAFETYFOR YOUR SAFETY
FOR YOUR SAFETY
!
!!
!
DO NOT
DO NOTDO NOT
DO NOT try to light any appliance.
!
!!
!DO NOT
DO NOTDO NOT
DO NOT to ch any electrical switch; DO NOT
DO NOTDO NOT
DO NOT se any
telephone in yo r b ilding.
!
!!
!IMMEDIATELY
IMMEDIATELYIMMEDIATELY
IMMEDIATELY call yo r gas s pplier from a neighbor's
telephone. Follow the gas s pplier's instr ctions. If yo
cannot reach yo r gas s pplier, call the fire department.
DO NOT
DO NOT DO NOT
DO NOT store or se gasoline or other
store or se gasoline or other store or se gasoline or other
store or se gasoline or other
flammable vapors and liq ids in the
flammable vapors and liq ids in theflammable vapors and liq ids in the
flammable vapors and liq ids in the vicinity of
vicinity of vicinity of
vicinity of
this or any other appliance.
this or any other appliance.this or any other appliance.
this or any 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.spaceray.com • email: [e-mail]

Form #43155040
May 2013 -1-
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1.0) Safety ................................................................................................................................................... 2
2.0) Installer Responsibility ...................................................................................................................... 2
3.0) General Information........................................................................................................................... 2
4.0) Minim m Clearances to Comb stibles ........................................................................................... 4
5.0) Typical S spension Methods ............................................................................................................ 5
6.0) LTU Series Specifications .................................................................................................................. 6
7.0) LTU Series Packing List ..................................................................................................................... 6
8.0) LTU Series Typical Layo ts ................................................................................................................ 8
8.1) LTU Series Dimensions ...................................................................................................................... 8
8.2) LTU 80-175 Series Heater Assembly Overview ........................................................................... 10
8.3) LTU 180-250 Series Heater Assembly Overview ......................................................................... 11
8.4) LTU Series 15’ Body Package Opening ......................................................................................... 11
8.5) LTU 80-130 Series Heater Assembly ............................................................................................ 12
8.6) LTU 125-250 Series – Joining of 5’ and 10’ Body Sections ...................................................... 15
9.0) LTS Series Specifications ................................................................................................................ 16
10.0) LTS Series Packing List ................................................................................................................... 16
11.0) LTS Series Typical Layo ts .............................................................................................................. 19
11.1) LTS Series Dimensions .................................................................................................................... 20
11.2) LTS 40-175 Series Heater Assembly Overview ........................................................................... 21
11.3) LTS 180-250 Series Heater Assembly Overview ......................................................................... 22
11.4) LTS Series Heater Assembly ........................................................................................................... 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 Assembly .............................................................................. 26
11.8) LTS Series - Attaching Draft Ind cer Assembly ........................................................................... 27
11.9) LTS Series - Inclined Mo nting Instr ctions ................................................................................. 28
12.0) Accessory Packages ........................................................................................................................ 30
13.0) M ltiple Hanging & Draft Ind cer Positions ................................................................................ 30
14.0) Gas Connections and Reg lations ................................................................................................. 32
15.0) Instr ctions for Press re Test Ga ge Connection ....................................................................... 34
16.0) Electrical Connections ..................................................................................................................... 35
17.0) Venting ............................................................................................................................................... 39
18.0) Air for Comb stion ........................................................................................................................... 43
18.1) Direct O tside Air for Comb stion ................................................................................................. 43
19.0) Lighting and Sh tdown Instr ctions .............................................................................................. 45
20.0) Seq ence of Operation .................................................................................................................... 45
21.0) Control Component Location .......................................................................................................... 46
22.0) Cleaning and Ann al Maintenance ............................................................................................... 47
23.0) Tro bleshooting G ide..................................................................................................................... 48
24.0) Replacing Parts ................................................................................................................................ 52
24.1) Removing Spark Electrode ............................................................................................................. 52
24.2) Removing Main B rner and Gas Valve ......................................................................................... 53
24.3) Air Switch Press re Check .............................................................................................................. 54
24.4) Ignition System Checks ................................................................................................................... 54
24.5) Motor and Blower Wheel Check ..................................................................................................... 55
25.0) Installation Data ............................................................................................................................... 55
26.0) Replacement Parts G ide ............................................................................................................... 56
27.0) Warnings Card .................................................................................................................................. 62
This heater complies with ANSI Z83.20 (c rrent standard) and CSA 2.34. Copies of the National F el Gas Code (ANSI
Z223.1-latest edition) are available from the CSA at 8501 East Pleasant Valley Road, Cleveland, Ohio 44131 or 55 Scarsdale
Road, Don Mills, Ontario M3B 2R3. All NFPA codes are available from the National Fire Protection Association, Batterymarch
Park, Q incy, Massach setts 02269.

Form #43155040
-2- May 2013
1.0) SAFETY
This heater is a self-contained infrared radiant t be heater. Safety information req ired d ring installation and
operation of this heater is provided in this man al and the labels on the prod ct. The installation, service and
maintenance of this heater m st be performed by a contractor q alified in the installation and service of gas
fired heating eq ipment.
All personnel in contact with the heater m st read and nderstand all safety information, instr ctions and labels
before operation. The following symbols will be sed in this man al to indicate important safety information.
Warning
WarningWarning
Warning
instr ctions m st be followed to prevent or avoid hazards which
may ca se serio s inj ry, property damage or death.
Ca tion
Ca tionCa tion
Ca tion
instr ctions m st be followed to prevent incorrect operation or
installation of
the heater which may ca se minor inj ry or property
damage.
2.0) INSTALLER RESPONSIBILITY
The installer is responsible for the following:
•
••
•The heater and venting, as well as electrical and gas s pplies m st be installed in accordance with these
installation instr ctions and any applicable codes and reg lations.
•
••
•Every heater shall be located with respect to b ilding constr ction and other eq ipment so as to permit
access to the heater.
•
••
•Each installer m st follow the clearances to comb stible materials for the heaters.
•
••
•Install the heater so that the s pports and hangers are correctly spaced in accordance with these
instr ctions. The heater m st be s pported by materials having a working load limit of at least 115lbs.
•
••
•S pply the owner with a copy of these Installation and Operation Instr ctions.
•
••
•Where nvented heaters are sed, gravity or mechanical means shall be provided to s pply and exha st at
least 4 CFM per 1,000 Bt /hr inp t of installed heaters.
•
••
•Never se the heater as a s pport for a ladder or other access eq ipment. Do not hang anything from the
heater.
•
••
•S pply all installation materials necessary that are not incl ded with the heater.
•
••
•Check the nameplate to make s re that the b rner is correct for the gas type in the b ilding and the
installation altit de.
3.0) GENERAL INFORMATION
This heater is a self-contained infrared radiant t be heater for se in locations where flammable gases or vapors
are not generally present (as defined by OSHA acceptable limits) and is intended for the heating of
nonresidential
nonresidentialnonresidential
nonresidential spaces.
INSTALLATION REQUIREMENTS
INSTALLATION REQUIREMENTSINSTALLATION REQUIREMENTS
INSTALLATION REQUIREMENTS
The installation m st conform to local b ilding codes or in the absence of local codes, with the National F el Gas
Code ANSI Z223.1/NFPA54 or the Nat ral Gas and Propane Installation Code CSA B149.1. Heaters shall be
installed by a licensed contractor or licensed installer. Clearances to comb stibles as o tlined in this man al
sho ld always be observed. In areas sed for storage of comb stible materials where they may be stacked
below the heater, NFPA54 req ires that the installer m st post signs that will “specify the maxim m permissible
stacking height to maintain the req ired clearances from the heater to comb stibles.”
The higher c
The higher cThe higher c
The higher capacity
apacity apacity
apacity LTS
LTSLTS
LTS/
//
/LTU
LTULTU
LTU 180
180180
180–
––
–2
22
25
55
50 models generate intense radiant heat.
0 models generate intense radiant heat.0 models generate intense radiant heat.
0 models generate intense radiant heat. Therefore, the minim m
Therefore, the minim m Therefore, the minim m
Therefore, the minim m
recommended mo nting height is 18 ft.
recommended mo nting height is 18 ft.recommended mo nting height is 18 ft.
recommended mo nting 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 20ft. above floor
200 models and 20ft. above floor 200 models and 20ft. above floor
200 models and 20ft. above floor
level for the LTS/LTU 225
level for the LTS/LTU 225level for the LTS/LTU 225
level for the LTS/LTU 225-
--
-250 models.
250 models.250 models.
250 models. Heaters may be mo nted a
Heaters may be mo nted aHeaters may be mo nted a
Heaters may be mo nted at vario s heights and angles depending on
t vario s heights and angles depending on t vario s heights and angles depending on
t vario s heights and angles depending on
the application.
the application.the application.
the application. If yo have any q estions, please cons lt yo r local Space
If yo have any q estions, please cons lt yo r local SpaceIf yo have any q estions, please cons lt yo r local Space
If yo have any q estions, please cons lt yo r local Space-
--
-Ray representative.
Ray representative.Ray representative.
Ray representative.
Every heater shall be located with respect to b ilding constr ction and other eq ipment so as to permit access
to the heater. Each installer shall se q ality installation practices when locating the heater and m st give
consideration to clearances to comb stible materials, vehicles parked below, lights, overhead doors, storage
areas with stacked materials, sprinkler heads, gas and electrical lines and any other possible obstr ctions or
hazards. Consideration also m st be given to service accessibility.

Form #43155040
May 2013 -3-
The heater, when installed in aircraft hangars and p blic garages, m st be installed in accordance with
ANSI/NFPA 409-latest edition (Standard for Aircraft Hangars), ANSI/NFPA 88a-latest edition (Standard for
Parking Str ct res), and ANSI/NFPA 88b-latest edition (Standard for Repair Garages) with the following
clearances:
a. At least 10 feet above the pper s rfaces of wings or engine enclos res of the highest aircraft that may be
ho sed in the hangar and at least 8 feet above the floor in shops, offices, and other sections of hangars
comm nicating with aircraft storage or service areas.
b. At least 8 feet above the floor in p blic garages. ▲
▲▲
▲WARNING:
WARNING:WARNING:
WARNING: Minim m clearances marked on the heater
m st 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 (Nat ral Gas and
Propane Installation Code).
b. For installation in p blic garages or aircraft hangars, the minim m clearances from the bottom of the
infrared heater to the pper s rface of the highest aircraft or vehicle shall be 50 percent greater than the
certified minim m clearance, b t the clearance shall not be less than 8 feet.
Altho gh these heaters may be sed in many applications other than space heating (e.g., process heating),
Space-Ray will not recognize the warranty for any se other than space heating.
For indoor installati
For indoor installatiFor indoor installati
For indoor installation only. Not for se in residential dwellings.
on only. Not for se in residential dwellings.on only. Not for se in residential dwellings.
on only. Not for se in residential dwellings.
This heater is for Indoor Installation and Covered Patio Installation only and can be sed in either Vented or
Unvented mode. The term Unvented act ally means Indirect Vented. While the prod cts of comb stion are
expelled into the b ilding, national codes req ire ventilation in the b ilding to dil te these prod cts of
comb stion. This ventilation may be provided by gravity 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 possibility of expos re to volatile and low flash point
materials exists, it co ld res lt in property damage or death. This heater m st not be installed in a spray booth
where the heater can operate d ring the spraying process. Cons lt yo r local fire marshal or ins rance company.
LTS
LTSLTS
LTS Series Only:
Series Only:Series Only:
Series Only: Since straight t be heaters are always hotter at the control end than at the fl e terminal end,
Since straight t be heaters are always hotter at the control end than at the fl e terminal end, Since straight t be heaters are always hotter at the control end than at the fl e terminal end,
Since straight t be heaters are always hotter at the control end than at the fl e terminal end,
always observe the minim m recommended mo nting heights shown on the specification sheets
always observe the minim m recommended mo nting heights shown on the specification sheetsalways observe the minim m recommended mo nting heights shown on the specification sheets
always observe the minim m recommended mo nting heights shown on the specification sheets in Section 9.0)
of this man al. Use U-t be config ration instead of straight t bes for spot or area heating (e.g., where a single
heater is tilized for space heating).
WARM
HOT WARM
WARM
WARM
HOT
High Altit de:
High Altit de:High Altit de:
High Altit de:
Appliances are s pplied as standard for altit des of O to 2,000 feet (0-610 m). High-altit de ratings are obtained
by a change in the orifice size. When ordered for high altit de installations, b rners are s pplied by the factory
ready for high altit de installation. Check the nameplate for altit de before proceeding with the installation. In
Canada the adj stment for altit de is made in accordance with Standard CGA 2.17, Gas-Fired Appliances for Use
at High Altit des.

Form #43155040
-4- May 2013
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.
Follow the instr ctions packaged with the kit for installation. Install the warnings card (ordered separately) and
complete the blank spaces sing the clearances from comb stibles table below. See Section 27 for a printed
copy of the warnings card.
Minim m clearances to comb stibles shall be meas red from the o ter s rfaces 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
Model No.
Model No.Model No.
Model No.
Mo nted Horizontally
Mo nted HorizontallyMo nted Horizontally
Mo nted Horizontally
Angle Mo nted at
Angle Mo nted at Angle Mo nted at
Angle Mo nted 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
24
”
6”
40”
15
”
40
”
12”
LTS
6
0
, 75
24
”
6”
6
0”
15
”
52
”
12”
LTS/LTU
80, 90
26
”
6”
66
”
15
”
52
”
12”
LTS/LTU 100 28” 6” 76” ** 15” 60” 12”
LTS/LTU 110, 120, 125, 130 32” 6” 82” ** 20” 66” 12”
LTS/LTU
140,
150
36
”
6”
87
” **
20
”
70
”
12
”
LTS/LTU 160, 175
42”
6”
93” **
20”
77”
12”
LTS/LTU
180, 200
44
”
6”
1
06
” **
20
”
84”
12
”
LTS/LTU
225,
2
5
0
56”
6”
112” **
20”
90”
18”
* When sed indirect vented, minim m clearance for CEILING m st be: 12” for LTS 40-75 and 18” for LTS/LTU
80-250. If optional corner and U-bend reflectors are not sed, the clearance m st be 18”.
** Maxim m clearance below red ces by 50% once yo are 25 ft. downstream from the b rner box.
▲WARNING:
▲WARNING:▲WARNING:
▲WARNING: Certain materials or objects, when stored nder the heater, will be s bjected to radiant heat and
Certain materials or objects, when stored nder the heater, will be s bjected to radiant heat and Certain materials or objects, when stored nder the heater, will be s bjected to radiant heat and
Certain materials or objects, when stored nder the heater, will be s bjected to radiant heat and
co ld be serio sly damaged.
co ld be serio sly damaged.co ld be serio sly damaged.
co ld be serio sly damaged. Observe the Minim m Clearances to Comb stibles listed in the man al and on the
Observe the Minim m Clearances to Comb stibles listed in the man al and on the Observe the Minim m Clearances to Comb stibles listed in the man al and on the
Observe the Minim m Clearances to Comb stibles listed in the man al 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 m st be maintained to comb stibles and other materials that may be
ces specified above m st be maintained to comb stibles and other materials that may be ces specified above m st be maintained to comb stibles and other materials that may be
ces specified above m st be maintained to comb stibles and other materials that may be
damaged by temperat res 90ºF above ambient temperat re.
damaged by temperat res 90ºF above ambient temperat re.damaged by temperat res 90ºF above ambient temperat re.
damaged by temperat res 90ºF above ambient temperat re. Clearances to comb stibles are posted on the
Clearances to comb stibles are posted on the Clearances to comb stibles are posted on the
Clearances to comb stibles are posted on the
control box.
control box.control box.
control box. In areas sed for storage of comb stible materials wher
In areas sed for storage of comb stible materials wherIn areas sed for storage of comb stible materials wher
In areas sed for storage of comb stible materials where they may be stacked below the heater,
e they may be stacked below the heater, e they may be stacked below the heater,
e they may be stacked below the heater,
NFPA54 req ires that the installer m st post signs that will “specify the maxim m permissible stacking height
NFPA54 req ires that the installer m st post signs that will “specify the maxim m permissible stacking height NFPA54 req ires that the installer m st post signs that will “specify the maxim m permissible stacking height
NFPA54 req ires that the installer m st post signs that will “specify the maxim m permissible stacking height
to maintain the req ired clearances from the heater to comb stibles.”
to maintain the req ired clearances from the heater to comb stibles.”to maintain the req ired clearances from the heater to comb stibles.”
to maintain the req ired clearances from the heater to comb stibles.” Space
SpaceSpace
Space-
--
-Ray recommends posting these
Ray recommends posting these Ray recommends posting these
Ray recommends posting these
s
ss
signs adjacent to the heater thermostat or other s itable location that will provide enhanced visibility.
igns adjacent to the heater thermostat or other s itable location that will provide enhanced visibility.igns adjacent to the heater thermostat or other s itable location that will provide enhanced visibility.
igns adjacent to the heater thermostat or other s itable location that will provide enhanced visibility.
2. The stated clearance to comb stibles represents a s rface temperat re of 90
2. The stated clearance to comb stibles represents a s rface temperat re of 902. The stated clearance to comb stibles represents a s rface temperat re of 90
2. The stated clearance to comb stibles represents a s rface temperat re of 90 ºF
ºFºF
ºF (32
(32(32
(32 ºC) above room
ºC) above room ºC) above room
ºC) above room
temperat re. B ilding materials with a low heat to
temperat re. B ilding materials with a low heat totemperat re. B ilding materials with a low heat to
temperat re. B ilding materials with a low heat tolerance (s ch as plastics, vinyle siding, canvas, tri
lerance (s ch as plastics, vinyle siding, canvas, trilerance (s ch as plastics, vinyle siding, canvas, tri
lerance (s ch as plastics, vinyle siding, canvas, tri-
--
-ply, etc.)
ply, etc.) ply, etc.)
ply, etc.)
may be s bject to degradation at lower temperat res. It is the installer’s responsibility to ass re that adjacent
may be s bject to degradation at lower temperat res. It is the installer’s responsibility to ass re that adjacent may be s bject to degradation at lower temperat res. It is the installer’s responsibility to ass re that adjacent
may be s bject to degradation at lower temperat res. It is the installer’s responsibility to ass re that adjacent
materials are protected from degradation.
materials are protected from degradation.materials are protected from degradation.
materials are protected from degradation.

Form #43155040
May 2013 -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
Vario s means of s spending the heater can be sed. See the following drawings for typical examples.
1. Use only noncomb stible materials for s spending hangers and brackets.
2. A minim m No. 2 chain with a working load limit of 115 lbs. is req ired.
3. T rnb ckles can be sed with chains to allow leveling of the heater. All “S” hooks and eye bolts m st be
man ally crimped closed by the installer.
4. When sing rigid means for heater s spension (rod, flat bar, etc.) provide s fficient lengths or swing
joints to compensate for expansion. See Fig res b and c.
5. Heaters s bject to vibration m st be provided with vibration isolating hangers.
6. Heaters m st not be s pported by gas or electric s pply lines and m st be s spended from a permanent
str ct re with adeq ate load capacity.
Space-Ray recommends that the body sections be s spended sing chains with t rnb ckles. This will allow slight
adj stments after assembly and heater expansion/ contraction d ring operation.
If a “trapeze” method is sed for t be s pport/hanger brackets (shown below), the minim m chain length for the
two connecting chains is 36” to minimize any vibration that might be generated by the draft ind cer assembly. If
these chains m st be less than 36”, then do not se the trapeze method and, instead, se individ al chains on
each t be s pport/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 #43155040
-6- May 2013
6.0) LTU SERIES SPECIFICATIONS
Model
Model Model
Model
No.
No.No.
No.
Inp t
Inp tInp t
Inp t
,
,,
,
Bt /hr
Bt /hrBt /hr
Bt /hr
Fl e Restrictor
Fl e Restrictor Fl e Restrictor
Fl e Restrictor Plate
PlatePlate
Plate
I.D. &
I.D. & I.D. &
I.D. & Part #
Part #Part #
Part #
Orifice Size
Orifice SizeOrifice Size
Orifice Size
Minim m *
Minim m *Minim m *
Minim m *
Mo nting Height
Mo nting HeightMo nting Height
Mo nting Height
High
HighHigh
High Low
LowLow
Low Nat ral Gas
Nat ral GasNat ral Gas
Nat ral Gas Propane Gas
Propane GasPropane Gas
Propane Gas
@
@@
@
Horizontal
HorizontalHorizontal
Horizontal
@
@@
@
45º Angle
45º Angle45º Angle
45º Angle
LTU 80
80,000
5
0,5
00
1
-
1/2”
#42741050
#19
(0.166)
#38
(0.102)
13 ft.
12 ft.
LTU 90
90,000
57,000
1
-
1/2”
#42741050
#16
(0.177)
#36
(0.106)
13 ft.
12 ft.
LTU 100 100,000 63,000 1-5/8” #42741060 #14 (0.182) #33 (0.113) 13 ft. 12 ft.
LTU 110 110,000 69,500 1-3/4” #42741070 #10 (0.194) #31 (0.120) 14 ft. 13 ft.
LTU 120 120,000 76,000 1-3/4” #42741070 13/64 (0.203) 1/8 (0.125) 14 ft. 13 ft.
LTU 125
125,000
80
,000
1
-
7/8”
#42741080
#5
(0.20
6
)
#30
(0.129)
14 ft.
13 ft.
LTU 130 130,000 82,000 1-7/8” #42741080 #4 (0.209) 3.3mm (0.130) 14 ft. 13 ft.
LTU 140
1
4
0,000
88
,
5
00
2
-
1/32”
#42741090
5.5mm
(0.216)
#29
(0.136)
15 ft.
14 ft.
LTU 150 150,000 95,000 2-1/32” #42741090 5.7mm (0.224) #28 (0.140) 15 ft. 14 ft.
LTU 160 160,000 100,000 2-1/4” #42741100 5.8mm (0.228) #27 (0.144) 15 ft. 14 ft.
LTU 175
175,000
1
10
,000
2
-
1/4”
#42741100
“C
”
(0.242
)
3.8mm
(0.150
)
15
ft.
14
ft.
LTU 180
1
8
0,000
114
,000
2
-
1/4”
#42741100
“C”
(0.242)
#24
(0.152)
18 ft.
17 ft.
LTU 200
200,000
125
,000
2
-
3/8”
#42741130
“F”
(0.2
57
)
#21
(0.159
)
18 ft.
17
ft.
LTU
225
225,000
146,000
2
-
1/2”
#42741140
6.9mm
(0.272)
#18
(0.170)
20 ft.
19 ft.
LTU 250
250,000
162,000
2
-
3/4”
#42741150
“K”
(0.281)
4.5mm
(0.177)
20 ft.
19 ft.
* MOUNT HEATERS AS HIGH AS POSSIBLE. Minim ms are shown as a g ideline for h man comfort and niform
energy distrib tion for complete b ilding heating applications. Cons lt yo r Space-Ray representative for the
partic lars of yo r installation req irements.
Type
TypeType
Type
Gas
GasGas
Gas
Gas Pipe
Gas PipeGas Pipe
Gas Pipe
Connection
Connection Connection
Connection
T be
T beT be
T be
Diameter
DiameterDiameter
Diameter
Fl e
Fl eFl e
Fl e
Connection
ConnectionConnection
Connection1
11
1
Fresh Air
Fresh Air Fresh Air
Fresh Air
Connection
ConnectionConnection
Connection
Electrical
ElectricalElectrical
Electrical
S pply
S pplyS pply
S pply
C rrent
C rrentC rrent
C rrent
Rating
RatingRating
Rating
Nat ral
or Propane
½” MPT
(Male) 4” 4” Ro nd 6” Ro nd
120 Volt,
60Hz,
1 Phase 2.6 Amp
1 LTU 180-250: 6” ro nd. See Section 17.0) for vent sizes and limitations.
F se
F seF se
F se
Rating:
Rating:Rating:
Rating:
Ignition Syste
Ignition SysteIgnition Syste
Ignition Syste
m (direct spark):
m (direct spark):m (direct spark):
m (direct spark):
In
-
line: 2 Amp 250V
(for 24V Circ it) 30 second pre-p rge period
7.0) LTU SERIES PACKING LIST
A.
A.A.
A. Control/Draft Ind ce
Control/Draft Ind ceControl/Draft Ind ce
Control/Draft Ind cer Package
r Packager Package
r Package
Part Description
Part DescriptionPart Description
Part Description
QTY
QTYQTY
QTY
Control
Box Assembly
................................
................................
................................
..............................
1
Draft Ind cer & J nction Box
Assembly
................................
................................
................................
1
Fl e Restrictor Plate (Se
e Section
6.0)
for plate I.D. and part no.)
................................
...................
1
4”
x
6
”
Starting
Collar
1
(#
4289200
9
)
S pplied with
LTU
180
-
25
0
................................
.................
1
Control Fastener Kit
(#42907
0
1
0)
................................
................................
................................
.......
1
Containing:
#
8
-
32
Screws
& N ts
(
#02166010 &
#021
2703
0)
................................
..........
2
¼
-
20 Lockn
ts (#02167010)
................................
................................
..............
6
T be Flange Gasket
(#42921000)
................................
................................
................................
......
2
Installation & Operation Instr ctions
(#43
1550
4
0
)
................................
................................
..........
1
Gas connector
,
5/8” OD x 36”
2
(#30302360)
................................
................................
....................
1
1 4-inch Starting Collar (#40504020) s pplied with LTU 80-175 models.
2 LTU 225 and 250 models sing Gas Connector, 1” OD x 36” (#30302361).

Form #43155040
May 2013 -7-
LTU 80
LTU 80LTU 80
LTU 80-
--
-25
2525
250
0 0
0 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-N7................. #42883510 LTU 150-N7 ..............#42883670 LTU 80-L7................. #42883520 LTU 150-L7 .............. #42883680
LTU 90-N7................. #42883530 LTU 160-N7 ..............#42883690 LTU 90-L7................. #42883540 LTU 160-L7 .............. #42883700
LTU 100-N7 .............. #42883550 LTU 175-N7 ..............#42883710 LTU 100-L7 .............. #42883560 LTU 175-L7 .............. #42883720
LTU 110-N7 .............. #42883570 LTU 180-N7 ..............#42883730 LTU 110-L7 .............. #42883580 LTU 180-L7 .............. #42883740
LTU 120-N7 .............. #42883590 LTU 200-N7 ..............#42883750 LTU 120-L7 .............. #42883600 LTU 200-L7 .............. #42883760
LTU 125-N7 .............. #42883610 LTU 225-N7 ..............#42883770 LTU 125-L7 .............. #42883620 LTU 225-L7 .............. #42883780
LTU 130-N7 .............. #42883630 LTU 250-N7 ..............#42883790 LTU 130-L7 .............. #42883640 LTU 250-L7 .............. #42883800
LTU 140-N7 .............. #42883650 LTU 140-L7 .............. #42883660
B.
B.B.
B. LTU
LTULTU
LTU 8
88
80
00
0-
--
-2
22
25
55
50
00
0 Body Package Descriptions
Body Package DescriptionsBody Package Descriptions
Body Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
System Lengths
System LengthsSystem Lengths
System Lengths
Ft.
Ft.Ft.
Ft.
15’ Body Pkg. 42881000
15’ Body Pkg. 4288100015’ Body Pkg. 42881000
15’ Body Pkg. 42881000 5’ Body Pkg. 4
5’ Body Pkg. 45’ Body Pkg. 4
5’ Body Pkg. 42882000
28820002882000
2882000 10’ Body Pkg. 42882020
10’ Body Pkg. 4288202010’ Body Pkg. 42882020
10’ Body Pkg. 42882020
Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty.
30’
1
-
-
40’
1
1
-
5
0’
1
-
1
LTU Body Package Components
LTU Body Package ComponentsLTU Body Package Components
LTU Body 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
Part #
Part #Part #
Part # Component Description
Component DescriptionComponent Description
Component Description Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty.
42914000
Pre
-
assembled 15’ ALC Steel U
-
T be
(two 12-radial hole flanges) with reflector 1 - -
42915000
Pre
-
assembled 5’ ALC Steel T be
(two 12-radial hole flanges) with reflector - 1 -
42915020
Pre
-
assembled 10’ ALC Steel T be
(12-radial hole flanges) with reflector - - 1
42895000 Control End Reflector 1 - -
42896000 Foot End Reflector 1 - -
42907020
Body Fastener Kit, Containing:
#02167010, ¼-20 Lockn ts (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, T be Flange Gaskets (QTY = 2)
- 1 1
42907030
Body 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 #43155040
-8- May 2013
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 config rations, the control nit m st be connected directly to either a) the 12-radial hole flange of
the al minized steel body section (for LTU 80-200 models) or b) the 6-hole flange of the 10 ft. al mi-
therm steel body section (for LTU 225 and 250 models).
2. Fail re to attach the control box to the 6
Fail re to attach the control box to the 6Fail re to attach the control box to the 6
Fail re to attach 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
man fact rer’s warranty.
man fact rer’s warranty.man fact rer’s warranty.
man fact rer’s warranty.
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 #43155040
May 2013 -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
Mo
MoMo
Mo
dels:
dels: dels:
dels:
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 #43155040
-10- May 2013
8.2) LTU 80-175 SERIES HEATER ASSEMBLY OVERVIEW
Typical Assembly Overview
(LTU175-40 Shown)
Tube Flange 12 Radial 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 #43155040
May 2013 -11-
8.3) LTU 180-250 SERIES HEATER ASSEMBLY OVERVIEW
Draft Inducer
Control Box
Aluminized Calorized Steel Tube (ALC)
(with two 12 radial hole Flanges)
U-Bend
Aluminized Calorized Steel Tube (ALC)
(with one 12 radial 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 12 radial 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 proced re below to open the 15’ body package.
1. Remove end reflectors from packaging.
2. Lift the t be at the flange end, then slide t be s pport/hanger bracket between marks on t bes and
tighten the “U” bolt hex n ts. Follow instr ctions in Sections 8.5) and 8.6) for the field assembly 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 #43155040
-12- May 2013
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
D ring field assembly of the heater, the recommended proced re is as follows:
1. Install the s spension (according to Section 8.1) sing proper s spension 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 Individ al S spension Method
Individ al S spension MethodIndivid al S spension Method
Individ al S spension Method
2. Lift the body section and s spend it into place. When lifting, ca tion sho ld be sed to avoid damaging
the assembly. Make s re 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 #43155040
May 2013 -13-
3. Assembly the reflectors onto the body section. Leave 3” space between the t be flange and the first
reflector for later mo nting of control box and draft ind cer.
4. Place the flanges of the control end reflector fl sh with the end of the first reflector. Sec re by sliding
speed clips onto reflector edges. Evenly space 6 speed clips on sides and top of reflectors to provide a
sn g fit. Place foot end reflector on the opposite end of the reflector and sec re 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 t be flange and sec re with 1/4-20 lockn ts. The control
box m st be mo nted with the perforated fresh air plate on top, facing the ceiling.
6. Attach the draft ind cer assembly to the left-hand draft ind cer t be flange and sec re with 1/4-20
lockn ts. A fl e restrictor plate is attached to the draft ind cer weld st ds. DO NOT DISCARD
DO NOT DISCARD DO NOT DISCARD
DO NOT DISCARD
RESTRICTOR PLATE
RESTRICTOR PLATE RESTRICTOR PLATE
RESTRICTOR PLATE and make s re this remains in place while the draft ind cer is being attached to the
heater body.
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 #43155040
-14- May 2013
7. Insert SJO cable thro gh the strain relief b shing of the control box and connect to appropriate terminal
blocks. Refer to the wiring diagram in Section16.0) for the connection.
3/8 Connector
SJO Cable
(wire leads to appropriate terminal blocks,
refer to the wiring diagram in Section 16.0)
7
8. Reflectors sho ld overlap 1” to 3” and m st be sec red by sliding speed clips on the reflector edges. One
speed clip is req ired for each side of the reflector.
9. Fasten the first reflector to the t be s pport/hanger bracket with (2) #10 sheet metal screws according
to Detail “A”. Mo nt the sliding reflector clamps (#42769010) per Reflector Clamp Installation (Detail “B”)
on all t be s pport/hanger brackets. Make s re the reflector can slide nder the clamp d ring 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
clamp installationclamp installation
clamp installation detail which allows the reflector to
detail which allows the reflector to detail which allows the reflector to
detail which allows the reflector to
slide nder the clamp d ring heater operation.
slide nder the clamp d ring heater operation.slide nder the clamp d ring heater operation.
slide nder the clamp d ring 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 the t be s pport/hanger bracket at the control box end of
Do not relocate the t be s pport/hanger bracket at the control box end of Do not relocate the t be s pport/hanger bracket at the control box end of
Do not relocate the t be s pport/hanger bracket at the control box end of
the heater. This will increase the weight on the emitter t be and can res lt
the heater. This will increase the weight on the emitter t be and can res lt the heater. This will increase the weight on the emitter t be and can res lt
the heater. This will increase the weight on the emitter t be and can res lt
in premat r
in premat rin premat r
in premat re t be fail re.
e t be fail re.e t be fail re.
e t be fail re.

Form #43155040
May 2013 -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 req ire the se of an additional 5’ body section for LTU 125-175 and 10’ body section for LTU 180-
250, as shown in Section 8.1). Follow the instr ction below for joining these sections.
1. Join the t be flanges of the body sections together with gaskets in between. Sec re the flanges with the
¼-20 screws and lockn ts provided.
2. Assemble the control box, draft ind cer, and other components as previo sly described in the heater
assembly instr ctions.
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 #43155040
-16- May 2013
9.0) LTS SERIES SPECIFICATIONS
Model
Model Model
Model
No.
No.No.
No.
Inp t
Inp tInp t
Inp t
,
,,
,
Bt /hr
Bt /hrBt /hr
Bt /hr
Fl e Restrictor
Fl e Restrictor Fl e Restrictor
Fl e Restrictor Plate
PlatePlate
Plate
I.D. &
I.D. & I.D. &
I.D. & Part #
Part #Part #
Part #
Orifice Size
Orifice SizeOrifice Size
Orifice Size
Minim m *
Minim m *Minim m *
Minim m *
Mo nting Height
Mo nting HeightMo nting Height
Mo nting Height
High
HighHigh
High Low
LowLow
Low Nat ral Gas
Nat ral GasNat ral Gas
Nat ral Gas Propane Gas
Propane GasPropane Gas
Propane Gas
@
@@
@
Horizontal
HorizontalHorizontal
Horizontal
@
@@
@
45º Angle
45º Angle45º Angle
45º Angle
LTS
40
40,000
25,000
1”
#
42741040
#3
1
(0.1
20
)
#49
(0.073)
10 ft.
9 ft.
LTS 50
50,000
31,500
1
-
1/8”
#4
2741030
3.
3
mm
(0.13
0
)
#
46
(0.081)
11 ft.
10 ft.
LTS 60
6
0,000
38,000
1
-
7/32”
#4
2741020
#27
(0.1
44
)
#
4
3
(0.08
9
)
1
2
ft.
1
1
ft.
LTS 75
75,000
50,000
1
-
7/16”
#4
2741010
#
20
(0.161)
#39
(0.099)
13 ft.
12 ft.
LTS
80
80,000
50,500
1
-
1/2”
#42741050
#19
(0.166)
#38
(0.102)
13 ft.
12 ft.
LTS
90
90,000
57,000
1
-
1/2”
#42741050
#16
(0.177)
#36
(0.106)
13 ft.
12 ft.
LTS 100 100,000 63,000 1-5/8” #42741060 #14 (0.182) #33 (0.113) 13 ft. 12 ft.
LTS 110 110,000 69,500 1-3/4” #42741070 #10 (0.194) #31 (0.120) 14 ft. 13 ft.
LTS 120 120,000 76,000 1-3/4” #42741070 13/64 (0.203) 1/8 (0.125) 14 ft. 13 ft.
LTS 125 125,000 80,000 1-7/8” #42741080 #5 (0.206) #30 (0.129) 14 ft. 13 ft.
LTS 130 130,000 82,000 1-7/8” #42741080 #4 (0.209) 3.3mm (0.130) 14 ft. 13 ft.
LTS 140 140,000 88,500 2-1/32” #42741090 5.5mm (0.216) #29 (0.136) 15 ft. 14 ft.
LTS 150 150,000 95,000 2-1/32” #42741090 5.7mm (0.224) #28 (0.140) 15 ft. 14 ft.
LTS 160 160,000 100,000 2-1/4” #42741100 5.8mm (0.228) #27 (0.144) 15 ft. 14 ft.
LTS
175
175,000
1
10
,000
2
-
1/4”
#42741100
“C
”
(0.242
)
3.8mm
(0.150
)
15
ft.
14
ft.
LTS
180
1
8
0,000
114
,000
2
-
1/4”
#42741100
“C”
(0.242)
#24
(0.152)
18 ft.
17 ft.
LTS
200
200,000
12
5
,000
2
-
3/8”
#42741130
“F”
(0.2
57
)
#21
(0.159
)
18 ft.
17
ft.
LTS 225
225,000
146,000
2
-
1/2”
#42741140
6.9mm
(0.272)
#18
(0.170)
20 ft.
19 ft.
LTS 250
250,000
162,000
2
-
3/4”
#42741150
“K”
(0.281)
4.5mm
(0.177)
20 ft.
19 ft.
* MOUNT HEATERS AS HIGH AS POSSIBLE. Minim ms are shown as a g ideline for h man comfort and niform
energy distrib tion for complete b ilding heating applications. Cons lt yo r Space-Ray representative for the
partic lars of yo r installation req irements.
Type
TypeType
Type
Gas
GasGas
Gas
Gas Pipe
Gas PipeGas Pipe
Gas Pipe
Connection
ConnectionConnection
Connection
T be
T beT be
T be
Diameter
DiameterDiameter
Diameter
Fl e
Fl eFl e
Fl e
Connection
ConnectionConnection
Connection1
11
1
Fresh Air
Fresh Air Fresh Air
Fresh Air
Connection
ConnectionConnection
Connection
Electrical
ElectricalElectrical
Electrical
S pply
S pplyS pply
S pply
C rrent
C rrentC rrent
C rrent
Rating
RatingRating
Rating
Nat ral
or Propane
½” MPT
(Male) 4” 4” Ro nd 6” Ro nd
120 Volt,
60Hz,
1 Phase 2.6 Amp
1 LTS 180-250: 6” ro nd. See Section 17.0) for vent sizes and limitations.
F se
F seF se
F se
Rating:
Rating:Rating:
Rating:
Ignition System (direct spark):
Ignition System (direct spark):Ignition System (direct spark):
Ignition System (direct spark):
In
-
line: 2 Amp 250V
(for 24V Circ it) 30 second pre-p rge period
10.0) LTS SERIES PACKING LIST
A.
A.A.
A. Control/Draft Ind cer Package
Control/Draft Ind cer PackageControl/Draft Ind cer Package
Control/Draft Ind cer Package
Part Description
Part DescriptionPart Description
Part Description
QTY
QTYQTY
QTY
Control Box Assembly
................................
................................
................................
..............................
1
Dra
ft Ind cer & J nction Box
Assembly
................................
................................
................................
1
Fl e Restrictor Plate (See Section
9.0)
for plate I.D. and part no.)
................................
...................
1
4”
x
6
”
Starting
Collar
1
(#
42892009
)
S pplied with LTS 180
-
2
5
0
................................
.................
1
Control Fastener Kit
(#42907
01
0)
................................
................................
................................
.......
1
Containing:
#
8
-
32
Screws
& N ts
(
#02166010 &
#021
2703
0)
................................
..........
2
¼
-
20 Lockn ts (#02167010)
................................
................................
..............
6
T be Flange Gasket
(#42921000)
................................
................................
................................
......
2
Installation & Operation Instr ctions
(#431550
4
0)
................................
................................
..........
1
Gas connector
,
5/8” OD x 36”
2
(#30302360)
................................
................................
...................
1
1 4-inch Starting Collar (#40504020) s pplied with LTS 40-175 models.
2 LTS 225 and 250 models sing Gas Connector, 1” OD x 36” (#30302361)

Form #43155040
May 2013 -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 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 N
MODEL NMODEL N
MODEL NO.
O. O.
O. PART NO.
PART NO.PART NO.
PART NO.
LTS 40-N7 ................. #43187510 LTS 130-N7 ..............#42883630 LTS 40-L7 ................. #43187520 LTS 130-L7 .............. #42883640
LTS 50-N7 ................. #43187530 LTS 140-N7 ..............#42883650 LTS 50-L7 ................. #43187540 LTS 140-L7 .............. #42883660
LTS 60-N7 ................. #43187550 LTS 150-N7 ..............#42883670 LTS 60-L7 ................. #43187560 LTS 150-L7 .............. #42883680
LTS 75-N7 ................. #43187570 LTS 160-N7 ..............#42883690 LTS 75-L7 ................. #43187580 LTS 160-L7 .............. #42883700
LTS 80-N7 ................. #42883510 LTS 175-N7 ..............#42883710 LTS 80-L7 ................. #42883520 LTS 175-L7 .............. #42883720
LTS 90-N7 ................. #42883530 LTS 180-N7 ..............#42883730 LTS 90-L7 ................. #42883540 LTS 180-L7 .............. #42883740
LTS 100-N7 .............. #42883550 LTS 200-N7 ..............#42883750 LTS 100-L7 .............. #42883560 LTS 200-L7 .............. #42883760
LTS 110-N7 .............. #42883570 LTS 225-N7 ..............#42883770 LTS 110-L7 .............. #42883580 LTS 225-L7 .............. #42883780
LTS 120-N7 .............. #42883590
LTS 125-N7 .............. #42883610 LTS 250-N7 ..............#42883790
LTS 120-L7 .............. #42883600
LTS 125-L7 .............. #42883620 LTS 250-L7 .............. #42883800
B.
B.B.
B. LTS
LTSLTS
LTS 40
4040
40-
--
-200
200200
200 Body Package Descriptions
Body Package DescriptionsBody Package Descriptions
Body Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
System Lengths
System LengthsSystem Lengths
System Lengths
10’ Body Pkg.
10’ Body Pkg. 10’ Body Pkg.
10’ Body Pkg.
43337040
4333704043337040
43337040
10’ Extension Body Pkg.
10’ Extension Body Pkg. 10’ Extension Body Pkg.
10’ Extension Body Pkg.
43337010
4333701043337010
43337010
5’ Ending Body P
5’ Ending Body P5’ Ending Body P
5’ Ending Body P
kg.
kg. kg.
kg.
43336030
4333603043336030
43336030
Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty.
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 #43155040
-18- May 2013
C.
C.C.
C. LTS 225
LTS 225LTS 225
LTS 225-
--
-250 Body Package Descriptions
250 Body Package Descriptions250 Body Package Descriptions
250 Body Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
System
System System
System
Lengths
LengthsLengths
Lengths
10’ Starting Body Pkg.
10’ Starting Body Pkg. 10’ Starting Body Pkg.
10’ Starting Body Pkg.
43337050
4333705043337050
43337050
10’ Start/End Body Pkg.
10’ Start/End Body Pkg. 10’ Start/End Body Pkg.
10’ Start/End Body Pkg.
43337040
4333704043337040
43337040
10’ Extension Body Pkg.
10’ Extension Body Pkg. 10’ Extension Body Pkg.
10’ Extension Body Pkg.
43337010
4333701043337010
43337010
5’ Ending Body Pkg.
5’ Ending Body Pkg. 5’ Ending Body Pkg.
5’ Ending Body Pkg.
43336030
4333603043336030
43336030
Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty.
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 body packages are listed as follows.
LTS Body Package Components
LTS Body Package Components LTS Body Package Components
LTS Body 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’ Pkg.5’ 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 Qty.
Qty.Qty.
Qty. Q
QQ
Qty.
ty.ty.
ty. Qty.
Qty.Qty.
Qty. Qty.
Qty.Qty.
Qty.
43182060
Pre-assembled 10’ ALC Steel T be
(one 12-radial hole flange) with reflector 1 - - -
43182040
Pre-assembled 10’ ALC Steel T be
(no flange) with reflector - 1 - -
43181050
Pre-assembled 5’ ALC Steel T be
(one 12-radial hole flange) with reflector - - 1 -
43182023
Pre-assembled 10’ ATC Steel T be
(two 6-hole flanges) with reflector - - - 1
30462980 T be Co pling 1 1 1 -
43320000 End Reflector 1 - 1 1
42907140
Reflector/Co pling Fastener 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
Body 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 Lockn t (QTY = 6)
#02259000, ¼-20x5/8” Screws (QTY = 6)
#42921000, T be Flange Gasket (QTY = 1)
- - - 1

Form #43155040
May 2013 -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
* Minimum Distance Permitted
Between Burner and 90 Elbow
LTS 40 to LTS 100 10 FT.
LTS 110 to LTS 175 15 FT.
LTS 180 to LTS 250 20 FT.
80 FT.
SYSTEM
NOTES:
NOTES:NOTES:
NOTES:
1. In all config rations, the control nit m st be connected directly to either a) the 12-radial hole flange of
the 10 ft. al minized steel start/end body section (for LTS 40-200 models) or b) the 6-hole flange of the
10 ft. al mi-therm steel starting body section (for LTS 225 and 250 models). Fail re to attach the control
Fail re to attach the control Fail re to attach the control
Fail re to attach the control
box to the 6
box to the 6box to the 6
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 man fact rer’s warranty.
250 as indicated above will void the man fact rer’s warranty.250 as indicated above will void the man fact rer’s warranty.
250 as indicated above will void the man fact rer’s warranty.
2. Joining of two 90º elbows directly together to form a “Z” shape IS NOT
IS NOTIS NOT
IS NOT permitted.
3. 5 Ft. Body Packages may be tilized on any of these heaters to yield heater lengths from 15 ft. to 80 ft.
4. Any config ration of components not shown in the ill strations may be sed except as noted in 1 and 2
above.
MODEL
MODELMODEL
MODEL
EMITTER LENGTH
EMITTER LENGTHEMITTER LENGTH
EMITTER LENGTH
MO
MOMO
MODEL
DELDEL
DEL
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.
1
8
0 Ft.
LTS 125
30 Ft.
5
0 Ft.
1
LTS250
-
50 model only
–
nvente
d se.