Space-Ray nxs Assembly Instructions

Form #43343340

May 2021 A

ASSEMBLY INSTRUCTIONS – NXU

OWNER / INSTALLER: For your safety this manual must be carefully and thoroughly read and

understood before installing, operating or servicing this heater.

INFRARED RADIANT TUBE HEATER

Single and Two Stage Pull Through System (Negative Pressure)

Models:

NXU SERIES:

(50, 85, 110, 145, 175, 200) – (N5/L5) or (N7/L7)

!INSTALLER: This manual is the property of the owner. Please present this manual to the

owner when you leave the job site.

▲WARNING: Improper installation, adjustment, alteration, service, or maintenance can

cause property damage, injury or death. Read the installation, operation and maintenance

instructions thoroughly before installing or servicing this equipment.

IF YOU SMELL GAS:

FOR YOUR SAFETY

! DO NOT try to light any appliance.

! DO NOT touch any electrical switch; DO NOT use any

telephone in your building.

! IMMEDIATELY call your gas supplier from a neighbor's

telephone. Follow the gas supplier's instructions. If you

cannot reach your gas supplier, call the fire department.

DO NOT store or use gasoline or other

flammable vapors and liquids in the vicinity of

this or any other appliance.

!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.

SPACE-RAY

Post Office Box 36485 (28236) • 1700 Parker Drive (28208) • Charlotte, North Carolina

Phone (704) 372-6391 • Fax (704) 332-5843 • www.spaceray.com • email: info@spaceray.com

Scan warranty QR code on the right to

register your product.

Form #43343340

May 2021 A -1-

TABLE OF CONTENTS

SECTION DESCRIPTION PAGE

1.0) Typical Suspension Methods ............................................................................................................ 2

2.0) NXU Series Specifications ................................................................................................................. 3

3.0) NXU Series Packing List .................................................................................................................... 3

4.0) General Heater Assembly Requirements – ALL MODELS ........................................................... 9

4.1) Heater Assembly – MODELS NXU 50 & 85 (20FT SYSTEM) ...................................................... 11

4.2) Heater Assembly – MODEL NXU 110 (30FT SYSTEM)................................................................ 20

4.3) Heater Assembly – MODEL NXU 145 (40FT SYSTEM)................................................................ 31

4.4) Heater Assembly – MODEL NXU 175 (50FT SYSTEM)................................................................ 42

4.5) Heater Assembly – MODEL NXU 200 (60FT SYSTEM)................................................................ 53

4.6) Heater Assembly – Attaching Control and Draft Inducer .......................................................... 64

5.0) Multiple Draft Inducer Positions .................................................................................................... 65

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 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, Quincy, Massachusetts 02269.

This product can expose you to chemicals including ceramic fibers, which

are known to the State of California to cause cancer, and carbon monoxide,

which is known to the State of California to cause birth defects or other

reproductive harm. For more information go to www.p65warnings.ca.gov.

Form #43343340

-2- May 2021 A

1.0) TYPICAL SUSPENSION METHODS

Various means of suspending the heater can be used. See the following drawings for typical examples.

1. Use only 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 are recommended to use with chains to allow leveling of the heater. All “S” hooks and eye bolts

must be manually crimped closed by 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 by gas or electric supply lines and must be suspended from a permanent

structure with adequate load capacity.

Space-Ray recommends that the body sections be suspended using chains with turnbuckles. This will allow slight

adjustments after assembly and heater expansion/ contraction during operation.

The table Below shows the individual heater weights and the number of suspension points.

Model

Weight (lbs.)

Number of Suspension Points

NXU50-20

130

6

NXU85-20

130

6

NXU110-30

180

6

NXU145-40

240

8

NXU175-50

290

10

NXU200-60

340

10

Form #43343340

May 2021 A -3-

2.0) NXU SERIES SPECIFICATIONS

Model

No.

Btu/hr.

High

Input

(2 stage)

Btu/hr.

Low

Input

Flue Restrictor

Plate

I.D. & Part #

Orifice Size

Minimum *

Mounting Height

Natural Gas

Propane Gas

@

Horizontal

Turbulator

Qty.

NXU 50

50,000

32,500

1-1/8”

#42741030

#29

(0.136)

#47

(0.079)

12 ft.

5

NXU 85

85,000

50,000

1-7/16”

#42741010

4.2mm

(0.165)

2.5mm

(0.098)

13 ft.

7

NXU 110

110,000

71,500

1-5/8”

#42741060

5.0mm

(0.197)

#32

(0.116)

15 ft.

7

NXU 145

145,000

88,500

1-7/8”

#42741080

5.7mm

(0.224)

#29

(0.136)

18 ft.

9

NXU 175

175,000

114,000

2-3/8”

#42741130

“E”

(0.250)

#26

(0.147)

19 ft.

3

NXU 200

200,000

125,000

3-1/4”

#30215509

“G”

(0.261)

5/32”

(0.156)

21 ft.

2

* This chart is intended as a guide only, as heaters may be mounted at various heights. MOUNT HEATERS AS HIGH

AS POSSIBLE. Minimums are shown as a guideline for human comfort and uniform energy distribution for complete

building applications. Please consult your local Space-Ray Representative for a detailed analysis of your particular

infrared heating requirements.

Model Identification:

Control Option

Suffix

Gas Type

Description

N5

Natural

Single Stage Gas Valve – Single Stage Input

L5

Propane

Single Stage Gas Valve – Single Stage Input

N7

Natural

Two Stage Gas Valve – Modulating Input – High/Low Fire

L7

Propane

Two Stage Gas Valve – Modulating Input – High/Low Fire

Gas Pipe

Connection

Tube

Diameter

Flue

Connection

Fresh Air

Connection

Electrical

Supply

Current

Rating

½” MPT (Male)

4”

4” Round

120 Volt, 60Hz, 1 Phase

2.6 Amp

Fuse Rating:

Ignition System (direct spark):

In-line: 2 Amp 250V (for 24V Circuit)

30 second pre-purge period

3.0) NXU SERIES PACKING LIST

A. Control/Draft Inducer Package

Part Description QTY

Control Box Assembly .............................................................................................................................. 1

Draft Inducer & Junction Box Assembly ................................................................................................ 1

Draft Inducer & Junction Box Assembly w/Flue Restrictor Plate ....................................................... 1

4” Starting Collar (#40504020) ............................................................................................................. 1

Control Fastener Kit (#42907010) ....................................................................................................... 1

Containing: #8-32 Screws & Nuts (#02166010 & #02127030) ........................................... 2

¼ - 20 Locknuts (#02167010) ............................................................................... 6

Tube Flange Gasket (#42921000) ...................................................................................................... 2

Installation & Operation Instructions – Part A (#43343340) ............................................................ 1

Installation & Operation Instructions – Part B (#43343341) ............................................................ 1

Installation & Operation Instructions – General (#43343342) ......................................................... 1

Gas connector, 5/8” OD x 36” (#30302360) ..................................................................................... 1

Turbulator 24” Long (#44152240) See chart above for required quantities. ................................. -

NXU 50-200 CONTROL/DRAFT INDUCER PACKAGE NUMBERS

1-STAGE CONTROLS

TWO STAGE CONTROLS

MODEL NO. PART NO.

GAS TYPE

MODEL NO. PART NO.

GAS TYPE

NXU 50-N5 ............... #44480010

NXU 50-L5 ................ #44480020

NXU 85-N5 ............... #44480030

NXU 85-L5…………….#44480040

NATURAL

PROPANE

NATURAL

PROPANE

NXU 50-N7 ................ #44480510

NXU 50-L7 ................ #44480520

NXU 85-N7 ................ #44480530

NXU 85-L7…………….#44480540

NATURAL

PROPANE

NATURAL

PROPANE

NXU 110-N5 ............. #44480050

NXU 110-L5…………..#44480060

NATURAL

PROPANE

NXU 110-N7 ............. #44480550

NXU 110-L7…………..#44480560

NATURAL

PROPANE

NXU 145-N5 ............. #44480070

NXU 145-L5…………..#44480080

NATURAL

PROPANE

NXU 145-N7 ............. #44480570

NXU 145-L7…………..#44480580

NATURAL

PROPANE

Form #43343340

-4- May 2021 A

NXU 175-N5 ............. #44480090

NXU 175-L5…………. #44480100

NXU 200-N5 ............. #44480110

NXU 200-L5………… .#44480120

NATURAL

PROPANE

NATURAL

PROPANE

NXU 175-N7 ............. #44480590

NXU 175-L7…………. #44480600

NXU 200-N7 ............. #44480610

NXU 200-L7………… .#44480620

NATURAL

PROPANE

NATURAL

PROPANE

B. NXU50 & 85 – 20ft Body Packing List (complete system)

(Package Part Number is indicated on the outside of each corresponding carton.)

Body Package Descriptions

Pkg. Part #

42881500

Ref. No.

Part No.

Each Body Package Includes:

Qty.

1

42912169

10 Ft. Steel Tube with 6 Hole Flange (ATC)

1

2

42912180

10 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

1

3

42913000

U-Bend – 4”OD x 6”CLR

1

4

42894450

Reflector outer, 28” Wide x 42” Long

1

5

42894080

Reflector outer, 28” Wide x 100” Long

1

6

42894039

Reflector Overlap, 28” Wide x 33” Long

1

7

43319078

Reflector, inner 13” Wide x 91” Long (Asymmetrical)

2

8

43319039

Reflector, inner 13” Wide x 35” Long (Asymmetrical) Notched

2

9

42895100

End Reflector – Control end

1

10

42896100

End Reflector – U Bend end

1

11

43320250

Reflector Closure Plate

1

42907820

Reflector Channel kit NXU50/85 comprising:

12

44520019

Reflector Channel 82 3/8”

1

12a

44520049

Reflector Channel 26 3/8”

1

42907520

Support Bracket kit NXU 50/85/110 comprising:

13

42898100

Hanger Bracket – 28”

1

14

42898150

Hanger Bracket – 28” (with rollers)

2

42907490

Hardware kit NXU 50/85/110 comprising:

15

42873000

U-Bolt

2

16

40517059

Tube Retainer Strap

4

17

44436280

Reflector Spacer Bracket

3

18

42921000

Gasket Tube Flange

1

19

44441000

Side Panel Holder Bracket

6

20

44437030

Side Panel – 3”

2

42907530

Fastener kit NXU 50/85/110 comprising:

02266010

Speed clip

4

02125130

Screw, #10-24 x ½” Round Head Machine

6

02189080

Screw, #10-16 x 5/8” Self-Drill (TEKS)

65

02127120

Nut, Hex 5/16-18 SS

12

21

42769020

Clamp, Reflector Locking

4

02259000

Screw, HWHMS 1/4-20 x 5/8" SS

7

02167019

Locknut, ¼-20 SS

9

42907660

Side Panel kit NXU 50/85 comprising:

22

44437250

Side Panel – 25”

4

23

44437810

Side Panel – 81”

2

Form #43343340

May 2021 A -5-

C. NXU110 – 30ft Body Packing List (complete system)

(Package Part Number is indicated on the outside of each corresponding carton.)

Body Package Descriptions

Pkg. Part #

42881510

Ref. No.

Part No.

Each Body Package Includes:

Qty.

1

42912100

5 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

1

2

41932050

5 Ft. Steel Tube less Flanges (ALC)

1

3

42912180

10 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

1

4

42912179

10 Ft. Steel Tube with (two) 6 Hole Flanges (ATC)

1

5

42913000

U-Bend – 4”OD x 6”CLR

1

6

42894080

Reflector outer, 28” Wide x 100” Long

2

7

42894039

Reflector Overlap, 28” Wide x 33” Long (Overlap)

1

8

43319078

Reflector inner, 13” Wide x 91” Long (Asymmetrical)

2

9

43319089

Reflector inner, 13” Wide x 96” Long (Asymmetrical) Notched

2

10

42895100

End Reflector – Control end

1

11

42896100

End Reflector – U Bend end

1

12

43320250

Reflector Closure Plate

1

42907830

Reflector Channel kit NXU110 comprising:

13

44520019

Reflector Channel 82 3/8”

2

14

30462980

Coupling Assembly 4” OD Tube

1

42907520

Support Bracket kit NXU 50/85/110 comprising:

15

42898100

Hanger Bracket – 28”

1

16

42898150

Hanger Bracket – 28” (with rollers)

2

42907490

Hardware kit NXU 50/85/110 comprising:

17

42873000

U-Bolt

2

18

40517059

Tube Retainer Strap

4

19

44436280

Reflector Spacer Bracket

3

20

42921000

Gasket Tube Flange

1

21

44441000

Side Panel Holder Bracket

6

22

44437030

Side Panel – 3”

2

42907530

Fastener kit NXU 50/85/110 comprising:

02266010

Speed clip

4

02125130

Screw, #10-24 x ½” Round Head Machine

6

02189080

Screw, #10-16 x 5/8” Self-Drill (TEKS)

65

02127120

Nut, Hex 5/16-18 SS

12

23

42769020

Clamp, Reflector Locking

4

02259000

Screw, HWHMS 1/4-20 x 5/8" SS

7

02167019

Locknut, ¼-20 SS

9

42907670

Side Panel kit NXU 110 comprising:

24

44437250

Side Panel – 25”

2

25

44437810

Side Panel – 81”

4

Form #43343340

-6- May 2021 A

D. NXU145 – 40ft Body Packing List (complete system)

(Package Part Number is indicated on the outside of each corresponding carton.)

Body Package Descriptions

Pkg. 1 of 2

42881520

Pkg. 2 of 2

42881530

Ref. No.

Part No.

Each Body Package Includes:

Qty.

1

42912180

10 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

2

41932100

10 Ft. Steel Tube less Flanges (ALC)

1

3

42912179

10 Ft. Steel Tube with (two) 6 Hole Flanges (ATC)

1

4

42913000

U-Bend – 4”OD x 6”CLR

1

5

42894080

Reflector outer, 28” Wide x 100” Long

2

6

42894680

Reflector outer, 28” Wide x 67” Long

1

7

42894039

Reflector Overlap, 28” Wide x 33” Long

1

8

43319078

Reflector inner, 13” Wide x 91” Long (Asymmetrical)

2

9

43319089

Reflector inner, 13” Wide x 96” Long (Asymmetrical) Notched

2

10

43319069

Reflector inner, 13” Wide x 65” Long (Asymmetrical)

2

11

42895100

End Reflector – Control end

1

12

42896100

End Reflector – U Bend end

1

13

43320250

Reflector Closure Plate

1

42907840

Reflector Channel kit NXU145 comprising:

14

44520019

Reflector Channel 82 3/8”

2

14a

44520029

Reflector Channel 61 3/8”

1

15

30462980

Coupling Assembly 4” OD Tube

1

42907521

Support Bracket kit NXU 145 comprising:

16

42898100

Hanger Bracket – 28”

1

17

42898150

Hanger Bracket – 28” (with rollers)

3

42907500

Hardware kit NXU 145 comprising:

18

42873000

U-Bolt

2

19

40517059

Tube Retainer Strap

6

20

44436280

Reflector Spacer Bracket

4

21

42921000

Gasket Tube Flange

1

22

44441000

Side Panel Holder Bracket

8

23

44437030

Side Panel – 3”

2

42907540

Fastener kit NXU 145 comprising:

02266010

Speed clip

4

02125130

Screw, #10-24 x ½” Round Head Machine

8

02189080

Screw, #10-16 x 5/8” Self-Drill (TEKS)

80

02127120

Nut, Hex 5/16-18 SS

16

24

42769020

Clamp, Reflector Locking

6

02259000

Screw, HWHMS 1/4-20 x 5/8" SS

7

02167019

Locknut, ¼-20 SS

11

42907680

Side Panel kit NXU 145 comprising:

25

44437250

Side Panel – 25”

2

26

44437810

Side Panel – 81”

4

27

44437600

Side Panel – 60”

2

Form #43343340

May 2021 A -7-

E. NXU175 - 50ft Body Packing List (complete system)

(Package Part Number is indicated on the outside of each corresponding carton.)

Body Package Description

Pkg. 1 of 2

42881540

Pkg. 2 of 2

42881550

Ref. No.

Part No.

Each Body Package Includes:

Qty.

1

41932050

5 Ft. Steel Tube less Flanges (ALC)

2

42912180

10 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

2

3

41932100

10 Ft. Steel Tube less Flanges (ALC)

1

4

42912179

10 Ft. Steel Tube with (two) 6 Hole Flanges (ATC)

1

5

42913000

U-Bend – 4”OD x 6”CLR

1

6

42894080

Reflector outer, 28” Wide x 100” Long

3

7

42894300

Reflector, outer, 28” Wide x 30” Long

1

8

42894039

Reflector Overlap, 28” Wide x 33” Long

1

9

43319078

Reflector inner, 13” Wide x 91” Long (Asymmetrical)

2

10

43319089

Reflector inner, 13” Wide x 96” Long (Asymmetrical) Notched

4

11

43319039

Reflector inner, 13” Wide x 35” Long (Asymmetrical) Notched

2

12

42895100

End Reflector – Control end

1

13

42896100

End Reflector – U Bend end

1

14

43320250

Reflector Closure Plate

1

42907850

Reflector Channel kit NXU175 comprising:

15

44520019

Reflector Channel 82 3/8”

3

15a

44520029

Reflector Channel 37 3/8”

1

16

30462980

Coupling Assembly 4” OD Tube

3

42907524

Support Bracket kit NXU 175/200 comprising:

17

42898100

Hanger Bracket – 28”

1

18

42898150

Hanger Bracket – 28” (with rollers)

4

42907510

Hardware kit NXU 175/200 comprising:

19

42873000

U-Bolt

2

20

40517059

Tube Retainer Strap

8

21

44436280

Reflector Spacer Bracket

5

22

42921000

Gasket Tube Flange

1

23

44441000

Side Panel Holder Bracket

10

24

44437030

Side Panel – 3”

2

42907550

Fastener kit NXU 175/200 comprising:

02266010

Speed clip

4

02125130

Screw, #10-24 x ½” Round Head Machine

10

02189080

Screw, #10-16 x 5/8” Self-Drill (TEKS)

100

02127120

Nut, Hex 5/16-18 SS

20

25

42769020

Clamp, Reflector Locking

8

02259000

Screw, HWHMS 1/4-20 x 5/8" SS

7

02167019

Locknut, ¼-20 SS

11

42907690

Side Panel kit NXU 175 comprising:

26

44437250

Side Panel – 25”

2

27

44437810

Side Panel – 81”

6

28

44437360

Side Panel – 36”

2

Form #43343340

-8- May 2021 A

F. NXU200 - 60ft Body Packing List (complete system)

(Package Part Number is indicated on the outside of each corresponding carton.)

Body Package Description

Pkg. 1 of 2

42881560

Pkg. 2 of 2

42881570

Ref. No.

Part No.

Each Body Package Includes:

Qty.

1

42912180

10 Ft. Steel Tube with 12 Radial Hole Flange (ALC)

2

41932100

10 Ft. Steel Tube less Flanges (ALC)

2

1

3

42912179

10 Ft. Steel Tube with (two) 6 Hole Flanges (ATC)

1

4

42913000

U-Bend – 4”OD x 6”CLR

1

5

42894080

Reflector outer, 28” Wide x 100” Long

4

6

42894039

Reflector Overlap, 28” Wide x 33” Long

1

7

43319078

Reflector inner, 13” Wide x 91” Long (Asymmetrical)

2

8

43319089

Reflector inner, 13” Wide x 96” Long (Asymmetrical) Notched

6

9

42895100

End Reflector – Control end

1

10

42896100

End Reflector – U Bend end

1

11

43320250

Reflector Closure Plate

1

42907860

Reflector Channel kit NXU200 comprising:

12

44520019

Reflector Channel 82 3/8”

4

13

30462980

Coupling Assembly 4” OD Tube

3

42907524

Support Bracket kit NXU 175/200 comprising:

14

42898100

Hanger Bracket – 28”

1

15

42898150

Hanger Bracket – 28” (with rollers)

4

42907510

Hardware kit NXU 175/200 comprising:

16

42873000

U-Bolt

2

17

40517059

Tube Retainer Strap

8

18

44436280

Reflector Spacer Bracket

5

19

42921000

Gasket Tube Flange

1

20

44441000

Side Panel Holder Bracket

10

21

44437030

Side Panel – 3”

2

42907550

Fastener kit NXU 175/200 comprising:

02266010

Speed clip

4

02125130

Screw, #10-24 x ½” Round Head Machine

10

02189080

Screw, #10-16 x 5/8” Self-Drill (TEKS)

100

02127120

Nut, Hex 5/16-18 SS

20

22

42769020

Clamp, Reflector Locking

8

02259000

Screw, HWHMS 1/4-20 x 5/8" SS

7

02167019

Locknut, ¼-20 SS

11

42907700

Side Panel kit NXU 200 comprising:

23

44437400

Side Panel – 40”

2

24

44437810

Side Panel – 81”

8

Form #43343340

May 2021 A -9-

4.0) GENERAL HEATER ASSEMBLY REQUIREMENTS – ALL MODELS

During field assembly of the heater, the recommended procedure is as follows:

a) Before hanging heater sections, first determine the actual layout of the system. See section 4.0 for complete

heater dimensions. Consideration must also be taken for flue pipe, fresh air ducting, gas piping, clearances to

combustibles, etc. before hanging heater. Typical suspension methods are shown in Section 1.

b) In all configurations, the burner box MUST be connected directly to the 6-hole flange of the 10 ft. ATC steel

firing tube.

TYPICAL ASSEMBLY LAYOUTS (with turbulators)

MODEL

EMITTER TUBE LENGTH

SYSTEM

LENGTH

2 Ft. Turbulator

(burner tube)

2 Ft. Turbulator

(exhaust tube)

NXU 50

10 Ft. (2 each)

20 Ft.

1

4

NXU 85

10 Ft. (2 each)

20 Ft.

3

4

NXU 110

10 Ft. (2 each), 5 Ft. (2 each)

30 Ft.

4

3

NXU 145

10 Ft. (4 each)

40 Ft.

5

4

NXU 175

10 Ft. (4 each), 5 Ft. (2 each)

50 Ft.

3

n/a

NXU 200

10 Ft. (6 each)

60 Ft.

2

n/a

Form #43343340

-10- May 2021 A

NOTES:

1. In all configurations, the control unit must be connected directly to the ATC steel body section having a 6 hole

flange.

IMPORTANT – THE NXU HAS FIXED HANGING POINT LOCATIONS. THE FOLLOWING POINTS MUST BE OBSERVED.

The recommended method for assembling the NXU model heaters is to assemble the heater at ground level and

raise it into the final hanging position. These instructions are based on that assembly method. If the heater is going

to be assembled in the hanging position please read the full instructions for the specific model thoroughly before

starting the installation.

1. The hanger bracket without rollers must be positioned at the U Bend end of the heater and secured with U

Bolts. The rest of the tube system is intended to be able move freely during expansion and contraction.

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4.1) HEATER ASSEMBLY – MODELS NXU 50 & 85 (20FT SYSTEM)

1. Install the suspension to the dimensions shown below using proper methods (see Section 1.0).

2. Refer to the diagrams below for all general dimensions of the complete heater assembly.

3. Refer to the diagram below for typical overview of the complete heater assembly.

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A. ASSEMBLY OF THE FIRST TUBE SECTION – NXU50 & 85 (20FT) Models

1. The recommended method for assembling the NXU model heaters is to assemble the heater at ground level

and raise it into the final hanging position. These instructions are based on that assembly method. If the heater

is assembled in the hanging position please read these instructions thoroughly before starting the installation.

2. Position the tubes as shown below on the sawhorses to begin assembly.

3. Attach the assembly alignment template (furnished 1 per order PN 44519000) in the following sequence. The

purpose of the assembly template is to prevent rotation of the tubes during assembly and control the

alignment of critical dimensions.

1. Place the first hanger bracket (with rollers) into the slots of the assembly alignment template

2. Check that the mounting holes in the tube flanges are aligned as shown in the illustration and that the tube

seam is facing downward. Failure to assemble the tube with seam facing down will void the

manufacturer’s warranty.

3. Align the template to the mounting holes in the flanges.

4. Using four ¼ - 20 screws and locknuts attach the assembly alignment template to the flanges.

Space the hanger brackets approximately to the dimensions shown in the figures on the following page. Note: The

distances are measured from leading edge of each hanger bracket. The reflector support channels will determine the

precise spacing between brackets.

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4. Space the hanger brackets according to the dimensions shown in the figures below for the first tube section.

Note: The distances are measured from the leading edge of each hanger bracket.

a) Place tubes over the hanger brackets with the welded seam facing down toward the ground. Failure to

assemble the tube with seam facing down will void the manufacturer’s warranty.

b) Secure the tubes to each support/hanger bracket using U-bolt clamps, tube retainer straps and 5/16-18

nuts provided. See Details A and B for the required methods for tightening each U-bolt and tube retainer

strap.

B. ADDING TURBULATORS AND U BEND – NXU50 & 85 (20FT) Models

1. Assemble the turbulators (packaged with the burner control) together by interlocking the slotted end portions.

1a. Slide (4) each of these into the return leg (exhaust tube) section until they are flush with the tube end.

1b. Slide (3) each of these into the hot leg (Burner tube) section until they are flush with the tube end.

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2. Slide the U-bend onto ends of each tube, mark the tubes 3” from the end and push on the U-bend until the

marks are inside the sleeves.

3. Secure the U – Bend to the tubes using (2) self-drill screws.

C. ADDING REFLECTOR CHANNELS – NXU50 & 85 (20FT) Models

1. Starting at the end closest to the assembly alignment fixture and tube flanges. Rest the reflector channel on

the second hanger and insert the threaded stud through the first support bracket as shown in step 1. Secure

the threaded stud with a ¼-20 nut.

2. Position the second reflector channel and insert the threaded stud through the first reflector channel and the

support bracket as shown in step 2. Secure the threaded stud with a ¼-20 nut.

3. Use a ¼-20 screw and nut to secure the end of the second reflector channel to the last support bracket.

4. From the end of the heater check that the reflector channels are in-line with each other make any necessary

adjustments and tighten the nuts securely.

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D. ADDING LOWER REFLECTORS – NXU50 & 85 (20FT) Models

1. Use the figure below to identify the reflectors before installing them on the hanger brackets.

2. Position the starting 91” Inner reflector panels over the hanger brackets and inside the reflector channel rail.

Use the assembly alignment template to set the spacing at the end of the heater.

3. The reflector panels are asymmetrical and must be positioned as shown in the figure on the next page. Arrange

the reflector panels to the dimensions shown.

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4. Secure inner reflector panels to the support brackets using the locking clamps. It is important to only secure

the reflectors in the locations shown below. The first and second inner reflectors must be able to move freely at

the overlap.

a) From the underside of the hanger bracket drive in the sheet metal screw until the tip is just through the

reflector panel.

b) Position the reflector locking clamp PN 42769020 over the screw and continue to drive the screw until the

reflector is secured in place.

c) Repeat this at each hanger bracket specified in figure below.

5. Place the reflector closure plate flush with the end of the inner asymmetrical reflector panels as shown below.

Secure this using one (2) speed clips (supplied in fastener kits) each side.

6. Place the 33” long overlap reflector panel on top of the lower asymmetrical reflector panels as shown below.

a) The overlap reflector should be placed at distances shown from leading edge of last support/hanger

bracket to end of overlap reflector.

b) Attach the lower reflector and overlap reflector using locking clamps shown below.

c) Secure the overlap panel using two (2) self-drill screws (supplied in fastener kits) each side.

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E. ATTACH REFLECTOR SPACER BRACKETS – NXU50 & 85 (20FT) Models

1. Attach the reflector spacer brackets at each tube support/hanger bracket using the #10-24 machine screws

PN 02125130 supplied in the fastener kit. See figure below.

F. ADD OUTER REFLECTOR PANELS – NXU50 & 85 (20FT) Models

1. Place the outer reflector panels over each of the reflector spacer brackets. Align each reflector to the ends

of the lower reflectors. To align reflectors precisely to the ends of the inner reflector, hold the end cap in

place against the inner reflector slide the outer reflector to rest against it. See figure below.

G. ATTACH SIDE PANELS – NXU50 & 85 (20FT) Models

1. Place side panels over the sides of both reflector panels between each hanger bracket and at the ends of

the heater. See figure below.

2. Secure these in place using the side panel holder brackets and six #10 self-drill sheet metal screws

supplied in the fastener kit. See figure below.

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H. ATTACH REFLECTOR END RFLECTORS – NXU50 & 85 (20FT) Models

1. Tighten all screws securing clamps and brackets installed earlier. Place end reflector s and secure using

#10 self-drill screws (supplied in fastener kits) as shown below.

I. RAISE HEATER INTO POSITION – NXU50 & 85 (20FT) Models

1. Raise the heater into position using a lift or other means that can maintain the heater at a safe angle

during the lifting process.

2. Install the heater onto the suspension chains at the spacing shown on the following page.

See section 4.6 for control box and draft inducer attachment.

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Space-Ray nxs Assembly Instructions

Space-Ray nxs Assembly Instructions

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