
Form #43155040
-6- May 2013
6.0) LTU SERIES SPECIFICATIONS
Model
Model Model
Model
No.
No.No.
No.
Btu/hr
Btu/hrBtu/hr
Btu/hr
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
High
HighHigh
High
Low
LowLow
Low
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 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 130 130,000
82,000 1-7/8”
#42741080
#4 (0.209)
3.3mm
(0.130)
14 ft. 13 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.
* MOUNT HEATERS AS HIGH AS POSSIBLE. Minimums are shown as a guideline for human comfort and uniform
energy distribution for complete building heating applications. Consult your Space-Ray representative for the
particulars of your installation requirements.
Gas
GasGas
Gas
Gas Pipe
Gas PipeGas Pipe
Gas Pipe
Connection
Connection Connection
Connection
Diameter
DiameterDiameter
Diameter
Connection
ConnectionConnection
Connection
1
11
1
Fresh Air
Fresh Air Fresh Air
Fresh Air
Connection
ConnectionConnection
Connection
Electrical
ElectricalElectrical
Electrical
Supply
SupplySupply
Supply
Current
CurrentCurrent
Current
Rating
RatingRating
Rating
or Propane
(Male) 4” 4” Round 6” Round
1 Phase 2.6 Amp
1
LTU 180-250: 6” round. See Section 17.0) for vent sizes and limitations.
Rating:
Rating:Rating:
Rating:
Ignition Syste
Ignition SysteIgnition Syste
Ignition Syste
m (direct spark):
m (direct spark):m (direct spark):
m (direct spark):
(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
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Draft Inducer & Junction Box
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Flue Restrictor Plate (Se
for plate I.D. and part no.)
................................
1
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Installation & Operation Instructions
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2
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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).
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