Ltu Series Specifications - Space-Ray LTU 160/100-N7 Installation And Operation Instructions Manual

6.0)

LTU SERIES SPECIFICATIONS

(2-Stage)
Btu/hr Btu/hr
Model High Low
No. Input Input
LTU 80 80,000 50,500
LTU 90 90,000 57,000
LTU 100 100,000 63,000
LTU 110 110,000 69,500
LTU 120 120,000 76,000
LTU 125 125,000 80,000
LTU 130 130,000 82,000
LTU 140 140,000 88,500
LTU 150 150,000 95,000
LTU 160 160,000 100,000
LTU 175 175,000 110,000
LTU 180 180,000 180,000
LTU 200 200,000 125,000
LTU 225 225,000 146,000
LTU 250 250,000 162,000
* 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.
Model Identification:
Control Option
Suffix
N5
L5
N7
L7
Type
Gas Connection
Natural
or Propane
LTU 225 and 250 require a minimum 3/4" nominal ID flexible gas connector.
1
LTU 180-250: 6" round. See Section 17.0) for vent sizes and limitations.
2
Module Electrical Rating:
Fuse : 2 Amp 250V (for 24V Circuit) Input Power
Input-Control: 18-30VAC 60 Hz (class 2 transformer)
Flame Sensitivity: 0.7 uA (microamps) minimum
Flue Restrictor
Plate
I.D. & Part #
1-1/2" 42741050
1-1/2" 42741050
1-5/8" 42741060
1-3/4" 42741070
1-3/4" 42741070
1-7/8" 42741080
1-7/8" 42741080
2-1/32" 42741090
2-1/32" 42741090
2-1/4" 42741100
2-1/4" 42741100
2-1/4" 42741100
2-3/8" 42741130
2-1/2" 42741140
2-3/4" 42741150
Gas Type Description
Natural Single Stage Gas Valve – Single Stage Input
Propane Single Stage Gas Valve – Single Stage Input
Natural Two Stage Gas Valve – Modulating Input – High/Low Fire
Propane Two Stage Gas Valve – Modulating Input – High/Low Fire
Gas Pipe Tube
Diameter
1
½" MPT
(Male) 4"
Orifice Size
Natural Gas Propane Gas
#19 (0.166) #38
#16 (0.177) #36
#14 (0.182) #33
#10 (0.194) #31
13/64 (0.203) 1/8
#5 (0.206) #30
#4 (0.209) 3.3mm
5.5mm (0.216) #29
5.7mm (0.224) #28
5.8mm (0.228) #27
"C" (0.242) 3.8mm
"C" (0.242) #24
"F" (0.257) #21
6.9mm (0.272) #18
"K" (0.281) 4.5mm
Flue Fresh Air
Connection Connection
2
4" Round 6" Round
Ignition System (direct spark):
30 second pre-purge period
21 second trial for ignition period
Single trial for ignition (local sense)
-6-
Minimum *
Mounting Height
@
Horizontal
(0.102) 13 ft.
(0.106) 13 ft.
(0.113) 13 ft.
(0.120) 14 ft.
(0.125) 14 ft.
(0.129) 14 ft.
(0.130) 14 ft.
(0.136) 15 ft.
(0.140) 15 ft.
(0.144) 15 ft.
(0.150) 15 ft.
(0.152) 18 ft.
(0.159) 18 ft.
(0.170) 20 ft.
(0.177) 20 ft.
Electrical Current
Supply Rating
120 Volt, 60Hz,
1 Phase 2.6 Amp
Form #43155010
@
45º Angle
12 ft.
12 ft.
12 ft.
13 ft.
13 ft.
13 ft.
13 ft.
14 ft.
14 ft.
14 ft.
14 ft.
17 ft.
17 ft.
19 ft.
19 ft.
Dec 2017