Space-Ray PCA-SS 75 Owner's manual

Form 43343110
May 2021
INSTALLATION AND OPERATION INSTRUCTIONS
INFRARED RADIANT POULTRY/SWINE TUBE HEATER
Single and Two Stage Push Through System (Positive Pressure)
THE DEFENDER Models:
PCA-SS 75 (N5,L5,N7,L7
PCA-SS 100 (N5,L5,N7,L7
PCA-SS 125 (N5,L5,N7,L7
PCA-SS 150 (N5,L5,N7,L7
FOR YOUR SAFETY: Exhaust fans MUST be operating on an appropriate cycle when heaters are operating to
avoid a high concentration of carbon monoxide. When used without fresh air, this heater may give off carbon
monoxide, an odorless and poisonous gas. CARBON MONOXIDE POISONING MAY LEAD TO DEATH. Early signs of
carbon monoxide poisoning resemble the flue with headaches, dizziness and nausea. If you experience these
signs, GET FRESH AIR IMMEDIATELY! Have the heaters serviced as soon as possible and check the ventilation in
the house.
These heaters are designed for agricultural applications and may operate with the use of either Natural Gas or
Liquid Propane (LP) Gas. Check the heater’s nameplate to determine the correct gas type before proceeding
with installation.
!INSTALLER: This manual is the property of the owner. Please present this manual to the owner when you leave
the job site.
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 [phone]• Fax [phone] • www.spaceray.com • email: [e-mail]
OWNER /INSTALLER: For your safety this manual must be carefully and thoroughly read and understood before
installing, operating or servicing this heater. This heater is intended for use with either Natural Gas or Propane
Gas. It must be installed by a qualified service person or a licensed contractor in accordance with state and local
codes. In the absence of these codes, the installation must conform to the National Fuel Gas Code ANSI Z223.1
(latest edition), also known as NFPA54 or the Natural Gas and Propane Installation Code CSA B149.1 in Canada.
▲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. For assistance or additional information, consult a qualified installer, service agency or
the gas supplier.
INSPECT all combustion air openings into the building and, if necessary, clear as they become blocked by litter,
dust, feathers or other matter.
Scan warranty QR code on the right to
register your product.

Form 43343110
May 2021 -1-
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1.0) Safety ................................................................................................................................................... 2
2.0) Installer Responsibility ...................................................................................................................... 2
3.0) General Information........................................................................................................................... 2
4.0) Minimum Clearances to Combustibles........................................................................................... 4
5.0) Specifications...................................................................................................................................... 5
6.0) Packing List......................................................................................................................................... 6
6.1) Accessory Packages .......................................................................................................................... 9
7.0) Typical Assembly Layouts –Straight Configuration ...................................................................11
7.1) Dimensions –Straight Configuration............................................................................................12
7.2) Heater Assembly / Joining of Tube Sections ...............................................................................13
8.0) Typical Suspension Methods ..........................................................................................................14
9.0) Assembly of Tube Sections.............................................................................................................16
9.3) Assembly of Extension Section ......................................................................................................17
9.4) Inserting Turbulators........................................................................................................................19
9.5) Adding Body Reflectors ...................................................................................................................19
10.0) Attaching Burner Box Assembly.....................................................................................................21
10.1) Connecting the TISS System ..........................................................................................................22
11.0) Gas Connections and Regulations.................................................................................................25
12.0) Instructions for Pressure Test Gauge Connection .......................................................................27
13.0) Electrical Connections .....................................................................................................................29
13.1) RECOMMENDED THERMOSTAT SENSOR LOCATION ..................................................................35
14.0) Venting ...............................................................................................................................................37
15.0) Air for Combustion ...........................................................................................................................40
15.1) Air for Combustion -- Horizontal Through a Sidewall ..................................................................40
15.2) Air for Combustion –Through Ceiling ...........................................................................................41
15.3) Air for Combustion (hog barn) ........................................................................................................43
16.0) Lighting and Shutdown Instructions..............................................................................................44
17.0) Sequence of Operation –Single Stage (N5/L5)..........................................................................44
17.1) Sequence of Operation –Two Stage (N7/L7)..............................................................................45
18.0) Cleaning and Annual Maintenance ...............................................................................................46
19.0) Troubleshooting Guide –Single Stage (N5/L5) ..........................................................................47
19.1) Troubleshooting Guide –Two Stage (N7/L7) ..............................................................................50
20.0) Replacing Parts ................................................................................................................................53
20.1) Removal of Main Burner and Electrodes......................................................................................53
20.2) Removing Gas Valve and Manifold Assembly .............................................................................54
20.3) Air Switch Pressure Check ..............................................................................................................54
20.4) Ignition System Checks ...................................................................................................................55
21.0) Installation Data ...............................................................................................................................56
22.0) Replacement Parts Guide...............................................................................................................57
23.0) Warnings Card ..................................................................................................................................60
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.

Form 43343110
-2- May 2021
1.0) SAFETY
This heater is a self-contained infrared radiant tube heater designed for use in poultry applications. Safety
information required during installation and operation of this heater is provided in this manual and the labels on
the product. The installation, service and maintenance of this heater must be performed by a contractor qualified
in the installation and service of gas fired heating equipment.
All personnel in contact with the heater must read and understand all safety information, instructions and labels
before operation. The following symbols will be used in this manual to indicate important safety information.
Warning instructions must be followed to prevent or avoid hazards which
may cause serious injury, property damage or death.
Caution instructions must be followed to prevent incorrect operation or
installation of the heater which may cause minor injury or property
damage.
2.0) INSTALLER RESPONSIBILITY
The installer is responsible for the following:
•The heater and venting, as well as electrical and gas supplies must be installed in accordance with these
installation instructions and any applicable codes and regulations.
•Every heater shall be located with respect to building construction and other equipment so as to permit
access to the heater.
•Each installer must follow the clearances to combustible materials for the heaters.
•Install the heater so that the supports and hangers are correctly spaced in accordance with these instructions.
The heater must be supported by materials having a working load limit of at least 115lbs.
•Ensure that the tube integrity safety system TISS™ supplied is installed in accordance with these instructions
and that the tension is correct.
•Supply the owner with a copy of these Installation and Operation Instructions.
•Where unvented heaters are used, gravity or mechanical means shall be provided to supply and exhaust at
least 4 CFM per 1,000 Btu/hr input of installed heaters.
•Never use the heater as a support for a ladder or other access equipment. Do not hang anything from the
heater.
•Supply all installation materials necessary that are not included with the heater.
•Check the nameplate to make sure that the burner is correct for the gas type in the building and the
installation altitude.
3.0) GENERAL INFORMATION
This heater is a self-contained infrared radiant tube heater designed for use in poultry houses where flammable
gases or vapors are not generally present.
For indoor installation only. Not for use in residential dwellings.
INSTALLATION REQUIREMENTS
Installation of this heater must be in accordance with all applicable codes shown in the instructions and/or the
local codes and authorities having jurisdiction. In the absence of local codes, the heater must be installed in
accordance to the National Fuel Gas Code ANSI Z223.1/NFPA54 in the U.S. or the Natural Gas and Propane
Installation Code CSA B149.1 in Canada. Heaters shall be installed by a licensed contractor or licensed installer.
Clearances to combustibles as outlined in the manual should always be observed. In areas used for storage of
combustible materials where they may be stacked below the heater, NFPA54 requires that the installer must
post signs that will “specify the maximum permissible stacking height to maintain the required clearances from
the heater to combustibles.”
Inspect all openings regularly and clean as necessary. This is necessary because litter, dust feathers and other
matter can become airborne and clog openings and adversely affect heater operation and performance.
Every heater shall be located with respect to building construction and other equipment so as to permit access to
the heater. Each installer shall use quality installation practices when locating the heater and must give
consideration to service accessibility.

Form 43343110
May 2021 -3-
This heater is used in VENTED or UNVENTED mode. The term Unvented actually means Indirect Vented. While
the products of combustion are expelled into the building, national codes require ventilation in the building to
dilute these products of combustion. This ventilation must be provided by gravity or mechanical means.
Ventilation requirements are addressed further in these instructions.
Although these heaters may be used in many applications other than space heating (e.g., process heating),
Space-Ray will not recognize the warranty for any use other than space heating.
This heater is not an explosion proof heater. Where the possibility of exposure to volatile and low flash point
materials exists, it could result in property damage or death. This heater must not be installed in a spray booth
where the heater can operate during the spraying process. Consult your local fire marshal or insurance company.
When installing Defenders into a barn with stalls or partitions, we recommend
that at least half of every stall area be covered with a heater.
Straight Configuration Only: Since straight tube heaters are always hotter at the control end than at the flue
terminal end, always observe the minimum recommended mounting heights shown on the specification sheets
and in Section 5.0) of this manual. Use U-tube configuration instead of straight tubes for spot or area heating (e.g.,
where a single heater is utilized for space heating).
High Altitude:
Appliances are supplied as standard for altitudes of O to 2,000 feet (0-610 m). High-altitude ratings are obtained
by a change in the orifice size. When ordered for high altitude installations, burners are supplied by the factory
ready for high altitude installation. Check the nameplate for altitude before proceeding with the installation. In
Canada the adjustment for altitude is made in accordance with Standard CGA 2.17, Gas-Fired Appliances for Use
at High Altitudes.
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 43343110
-4- May 2021
4.0) MINIMUM CLEARANCES TO COMBUSTIBLES
Install the warnings card (ordered separately) and complete the blank spaces using the clearances from
combustibles table below. See Section 25 for a printed copy of the warnings card.
Minimum clearances to combustibles shall be measured from the outer surfaces as shown in the following
diagram:
MINIMUM CLEARANCES TO COMBUSTIBLES
Model No.
Mounted Horizontally
Angle Mounted at
45º
Sides
Ceiling*
Below
Ends
45º Front
45º Rear
PCA-SS 75
22”
10”
60”
15”
52”
12”
PCA-SS 100
28”
10”
70” **
15”
58”
12”
PCA-SS 125
28”
10”
76” **
20”
66”
12”
PCA-SS 150
34”
10”
81” **
20”
70”
12”
* Exhaust hood must be installed.
** Maximum clearance below reduces by 50% once you are 25ft. downstream from the burner box.
▲WARNING: Certain materials or objects, when stored under the heater, will be subjected to radiant heat and
could be seriously damaged. Observe the Minimum Clearances to Combustibles listed in the manual and on the
heater at all times.
NOTE:
1. The clearances specified above must be maintained to combustibles and other materials that may be
damaged by temperatures 90ºF above ambient temperature. Clearances to combustibles are posted on the
burner box. In areas used for storage of combustible materials where they may be stacked below the heater,
NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height to
maintain the required clearances from the heater to combustibles.” Space-Ray recommends posting these signs
adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.
2. The stated clearance to combustibles represents a surface temperature of 90 ºF (32 ºC) above room
temperature. Building materials with a low heat tolerance (such as plastics, vinyle siding, canvas, tri-ply, etc.) may
be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent
materials are protected from degradation.

Form 43343110
May 2021 -5-
5.0) SPECIFICATIONS
Model No.
Btu/hr
High
Input
(2-stage)
Btu/hr
Low
Input
Air Plate
Part #
Orifice Size
Minimum *
Mounting Height
Turbulator
Qty.
Natural Gas
Propane Gas
@
Horizontal
@
45º Angle
PCA-SS 75
75,000
50,000
44140063
#21
(0.159)
2.5mm
(0.098)
8 ft.
8 ft.
5
PCA-SS 100
100,000
65,000
44140065
#12
(0.189)
#32
(0.116)
8 ft.
8 ft.
3
PCA-SS 125
125,000
80,000
44140066
#4
(0.209)
#30
(0.129)
9 ft.
9 ft.
6
PCA-SS 150
150,000
100,000
44140067
“A”
(0.234)
#27
(0.144)
9 ft.
9 ft.
4
* 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
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
Type
Gas
Gas Pipe
Connection
Tube
Diameter
Flue
Connection1
Fresh Air
Connection1
Electrical
Supply
Current
Rating
Natural
or Propane
½” MPT
(Male)
4”
4” Round
4” Round
120 Volt, 60Hz,
1 Phase
1.74 Amp
1See Section 14.0) for vent sizes when multiple heaters are connected into a common vent
Module Electrical Rating:
Ignition System (direct spark):
Input-Control: 18-30 VAC 50/60 Hz (class 2 transformer)
Input Power-Line: 120 VAC (L1, IND contacts only)
Flame Sensitivity: 0.7 uA (microamps) minimum
15 second trial for ignition period
15 second pre-purge period
60 second inter-purge period
30 second post-purge period
3 tries for ignition (separate flame sensor).

Form 43343110
-6- May 2021
6.0) PACKING LIST
A. PCA-SS Burner Package
Ref.
Part #
Each Control Package Includes:
Qty.
1
See chart.
Burner Box Assembly (Refer to the following chart for Package Part Numbers)
1
2
43343110
Installation and Operation Manual -not shown-
1
3
42907040
Control Fastener Kit - comprising of:
1
-
02189020
Screw, #10 x 1/2” Self-Drill (TEKS)
4
-
02167010
1/4-20 Locknuts
3
4
42921000
Tube Flange Gasket
1
5
43341000
Head End Reflector Kit (includes 2 reflectors and clips)
1
6
44152240
Turbulator –24” Long *See chart above for required quantities
*
7
30302360
Gas connector 5/8” OD x 36” – USA only
1
8
30285000
Manual Cut Off Valve –CSA listed ball valve ½” (packaged with control unit)
1
9
30545040
Turnbuckle
1

Form 43343110
May 2021 -7-
BURNER PACKAGE NUMBERS
SINGLE STAGE CONTROLS
TWO STAGE CONTROLS
MODEL NO.
PART NO.
GAS TYPE
MODEL NO.
PART NO.
GAS TYPE
PCA-SS 75-N5
44165250
NATURAL
PCA-SS 75/50-N7
44165750
NATURAL
PCA-SS 100-N5
44165270
NATURAL
PCA-SS 100/65-N7
44165770
NATURAL
PCA-SS 125-N5
44165290
NATURAL
PCA-SS 125/80-N7
44165790
NATURAL
PCA-SS 150-N5
44165310
NATURAL
PCA-SS 150/100-N7
44165810
NATURAL
PCA-SS 75-L5
44165260
PROPANE
PCA-SS 75/50-L7
44165760
PROPANE
PCA-SS 100-L5
44165280
PROPANE
PCA-SS 100/65-L7
44165780
PROPANE
PCA-SS 125-L5
44165300
PROPANE
PCA-SS 125/80-L7
44165800
PROPANE
PCA-SS 150-L5
44165320
PROPANE
PCA-SS 150/100-L7
44165820
PROPANE
COMPLETE MODEL SYSTEM
- Includes Burner Box and Body Package -
MODEL
GAS TYPE
SYSTEM LENGTH
TUBE MATERIAL*
PCA
Series
PCA-SS 75-20-L5
PCA-SS 75-20-N5
Propane
Natural
20 ft.
20 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 75-30-L5
PCA-SS 75-30-N5
Propane
Natural
30 ft.
30 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 100-30-L5
PCA-SS 100-30-N5
Propane
Natural
30 ft.
30 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 100-40-L5
PCA-SS 100-40-N5
Propane
Natural
40 ft.
40 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 125-30-L5
PCA-SS 125-30-N5
Propane
Natural
30 ft.
30 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 125-40-L5
PCA-SS 125-40-N5
Propane
Natural
40 ft.
40 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 125-50-L5
PCA-SS 125-50-N5
Propane
Natural
50 ft.
50 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 150-40-L5
PCA-SS 150-40-N5
Propane
Natural
40 ft.
40 ft.
Aluminized Steel
Aluminized Steel
PCA-SS 150-50-L5
PCA-SS 150-50-N5
Propane
Natural
50 ft.
50 ft.
Aluminized Steel
Aluminized Steel
* The first 10 ft. tube section used for Burner Box mounting is Aluminized Steel on ALL length systems.
STANDARD ACCESSORIES
Part #
Description
30285000
Manual Cut Off Valve –CSA listed ball valve ½” (packaged with control unit)
30302360
Gas connector, 5/8” OD x 36” (packaged with control unit)
44129500
Kit, Fresh Air Intake –Ceiling
44129510
Kit, Fresh Air Intake –Sidewall (includes 4” fresh air intake cap)
43341000
Kit, Reflector End Panels (packaged with control unit)
42924100
4” Exhaust Hood (for use on heater UNVENTED)
30297040
4” Vent Cap (for use on heater VENTED)
When installing a Defender series heater into a barn with stalls or partitions, we
recommend using a model that is no longer than 40 ft. in length. This
recommendation is based on the lower tube temperatures experienced by all
straight tube heaters as the length exceeds 40 ft.

Form 43343110
-8- May 2021
A. PCA (Aluminized Steel System) Body Package Descriptions
(Package Part Number is indicated on the outside of each corresponding carton.)
Systems
20Ft.
System
30Ft.
System
40Ft.
System
50Ft.
System
PCA Body Packages –Aluminized
20 Ft. pkg
44055210
30 Ft. pkg
44055320
40 Ft. pkg
44055420
50 Ft. pkg
44055520
Item
No.
Part #
Each Body Package Includes:
Qty.
Qty.
Qty.
Qty.
1
42912180
10 Ft. Tube with 12 Hole Flange
1
1
1
1
2
41932100
10 Ft. Tube less Flanges
1
2
3
4
3
43319100
Reflector, 9’ 11½”
2
3
4
5
4
30462980
Tube Coupling
1
2
3
4
-
-see below-
Hanger Kit Components
1
1
1
1
HANGER KIT COMPONENTS:
Item
No.
Part No.
Description
Qty.
20FT
Qty.
30FT
Qty.
40FT
Qty.
50FT
1
43980020
Wire Hanger –30 Deg Angle Mounting
4
5
6
7
2
43980150
Wire Hanger Clamp
2
2
2
2
3
02200100
Bolt, Round Head SQR Neck 5/16-18 x 4-1/2”
1
1
1
1
4
02354000
Nut, Hex Flange Head 5/16-18
1
1
1
1
5
43980250
Retainer - Reflector
2
3
4
5
6
43980300
Retainer - Reflector/Hanger
2
2
2
2
7
30519040
Spring
2
3
4
5
8
02189020
Screw, Hex Washer Head Self-Drill #10
13
17
21
25
9
02266010
Speed Clip (U-type)
2
4
6
8

Form 43343110
May 2021 -9-
6.1) ACCESSORY PACKAGES
A. End Reflector Accessory Package, Part #43341010
(1 pkg. per Straight Configuration Series)
Contains:
End Reflector, #43320000……QTY–2
Speed Clips, #02266010……QTY–8
B. Exhaust Hood Package, Part #42924100
Contains:
Exhaust Hood Assembly, #30779000……QTY–1
#8-18 x ½ Self-Drilling Screws, #02189030……QTY–2
C. Fresh Air Inlet (Through Ceiling) Package, Part
#44129500
Contains:
a) 4” Air Intake Assembly, #44129000……QTY–1
b) 4” x 30” Flexible Hose, #30675020 QTY-1
c) 4” Screw Clamp, #30676049 QTY-2
d) #12 x ¾” Sheet Metal Screws, #02240010……QTY–4
D. Fresh Air Inlet (Through Sidewall) Package, Part
#44129510
Contains:
a) 4” Fresh Air Intake Cap, #41000020……QTY–1
b) 4” x 30” Flexible Hose, #30675020 QTY-1
c) 4” Screw Clamp, #30676049 QTY-2
E. Cold Air Stopper, Part # 30683000 (Optional)

Form 43343110
-10- May 2021
F. Kit, 2-Stage Relay Board, Part #44195000
Contains:
Relay Board , #30709058……QTY–1
Enclosure, #30709059……QTY–1
Cord Connector –½” , #30635040……QTY–2
G. 4” Vent Cap, Part #30297040
(for use on heater VENTED)
H. 4” Flue Collar Adapter, Part #30504500
(for attachment to flue vent pipe)

Form 43343110
May 2021 -11-
7.0) TYPICAL ASSEMBLY LAYOUTS –STRAIGHT CONFIGURATION
MODEL
EMITTER LENGTH
2 Ft. Turbulator
Sections
Min.
Max.
PCA-SS 75
20 Ft.
30 Ft.
5
PCA-SS 100
30 Ft.
40 Ft.
3
PCA-SS 125
30 Ft.
40 Ft.
6
When installing a Defender series heater into a barn with stalls or partitions, we
recommend using a model that is no longer than 40 ft. in length. This
recommendation is based on the lower tube temperatures experienced by all
straight tube heaters as the length exceeds 40 ft.

Form 43343110
-12- May 2021
7.1) DIMENSIONS –STRAIGHT CONFIGURATION (48”HANGING CENTERS)

Form 43343110
May 2021 -13-
7.2) HEATER ASSEMBLY / JOINING OF TUBE SECTIONS

Form 43343110
-14- May 2021
8.0) 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 can be used 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.

Form 43343110
May 2021 -15-
8.3) ANGLE MOUNTING OF HEATERS
1. Angle mounting can be accomplished by using the loop portion of the wire hanger shown below to attach the
suspension components. This will produce an angle of approximately 30 degrees from the horizontal plane.
All suspension components can be used as outlined above in the TYPICAL SUSPENSION METHODS section.
Angle mounting can result in up to 30 % lower radiant output on the floor level and result in lower tube
temperatures when compared to horizontal mounting. Angle mounting of straight tubes for spot or area
heating (e.g. where a single heater is used for space heating) is not recommended unless you have additional
capacity or larger heaters specified/installed. If you are using straight tube heaters, you might have to install
two smaller size tube heaters with burners located at opposite ends, to provide more uniform energy
distribution and improved comfort level on the floor. Consult your Space-Ray Representative if you have any
questions prior to the installation concerning particulars of your application.

Form 43343110
-16- May 2021
9.0) ASSEMBLY OF TUBE SECTIONS
During field assembly of the heater body sections, the recommended procedure is as follows:
1. Before hanging heater sections, first determine the actual layout of the system (see Section 7.0 for details).
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 8.0).
2. Hang each tube section individually. DO NOT attach the heater tube sections together on the ground and
attempt to hang the entire system.
3. In all configurations, the burner box must be connected directly to the 12-radial hole flange of the 10 ft.
aluminized steel starting body section.
4. Assemble a wire hanger with clamps from the end of the heat exchanger tube having the mounting flange
using the 5/16”-18 round head square neck bolt and hex flange head nut as shown below. Align the tube
such that the welded seam is facing down toward the ground. Tighten the clamps to 17 ft./lbs.
Failure to assemble the tube with the seam facing down and installing the first tube wire hanger more than 6”
from the burner box will VOID the manufacturer’s warranty.
5. Suspend the chains to attach the wire hangers. Slide one end of the tube through the wire hanger without
clamps. Raise the tube end with the wire hanger and clamps up to the suspension chain, Use “S” hooks to
attach the wire hangers.

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9.4) ASSEMBLY OF EXTENSION SECTION
See typical assembly overview (Section 7.1) for typical complete assembly. Assemble additional extension
sections as required for all systems. (See Section 7.0) for typical layout details.
Join the tube sections together and secure with tube couplings as described below:
The following coupling tightening instructions MUST be followed properly
to ensure the integrity of the tube connections. Two #10 self-drilling
screws MUST be installed at every coupling as shown in the instructions
below. Failure to do so may result in serious injury or property damage.
1. Place the compression coupling over the end of the tube.
2. Use the small hole at the centerline of the coupling to check that the coupling is inserted correctly.
3. Partially tighten the bolt nearest the end of the tube (approximately half closed).

Form 43343110
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4. Slide the next tube into the coupling.
5. Make sure both tube ends are butted together.
6. Finish tightening both bolts to 40-60 ft./lbs. torque to ensure a complete seal.
7. Use the two Self-drilling screws through the pre-punched holes to secure the tubes in the coupling.
8. Check to ensure that the hardware is completely closed and the band is seated on the reaction block and
interference pins as illustrated above.
9. Once all the heater body sections are attached, make sure that the heater system is level. If it is not, slight
adjustments can be made using the turnbuckles. (See Section 8.0)
Important: NEVER reuse a coupling.. Always install a new coupling only and torque as per instructions above and
the diagrams below.

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9.5) INSERTING TURBULATORS
1. Assemble the turbulators together by interlocking the slotted end portions. Slide these into the last tube
section until they are flush with the tube end. Note: Refer to the table below for quantities of turbulators
required for each heater model.
MODEL
2 Ft. Turbulator Sections
PCS-SS 75
5
PCA-SS 100
3
PCA-SS 125
6
PCA-SS 150
4
9.6) ADDING BODY REFLECTORS
2. Slide the reflectors through the wire hangers.
3. The tube at the coupling joints must be covered. Slide the reflectors together and provide an overlap of two
(2”) inches for each reflector overlap.
4. Place a reflector retainer at the burner end and after each reflector overlap. Secure the retainers to the tube
using a spring provided with the heater as shown in Detail “A”. Note: The first reflector overlap must be able
to slide for natural expansion and contraction of the heater when in operation. See Detail “B” for retainer
location. The heaters can expand and contract up to 1-3/4”.
5. Secure the reflectors as shown in Detail “A” using #10 x 1/2” self-drilling sheet metal screws at the bottom of
each reflector retainer.
6. Lock the reflectors in place as shown in Detail “A”using the #10 x 1/2”self-drilling sheet metal screws
through the sides of each reflector retainer.
7. Secure the reflectors at the overlaps shown in Detail “C”by sliding speed clips onto the reflector edges.
8. Lock the first wire hanger as shown in Detail “D”by using a reflector/hanger retainer on each side and
securing with (2) #10 x ½” self-drilling sheet metal screws. Insert the screws from the inside of the reflector.