Space-Ray ADU25 Owner's manual

Form #44201100
Oct 2019
INSTALLATION AND OPERATION INSTRUCTIONS
OVERHEAD RADIANT TUBE HEATERS
Models: ADU25, ADU30, ADU35, ADU40, ADU45,
ADL25, ADL30, ADL35, ADL40, ADL45
Single Stage Pull Through System (Negative Pressure)
FOR YOUR SAFETY: If the heater is installed without a flue, 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 non residential space heating 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 neighbour's
telephone. Follow the gas supplier's instructions. If you
cannot reach your gas supplier, call the fire department.
DO NOT store or use petrol or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.
Gas Fired Products (UK) Ltd.
Chapel Lane, Claydon, Ipswich, Suffolk IP6 0JL, England
Phone [phone] Fax: [phone] E-mail: [e-mail] www.spaceray.com.uk
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 National and
local codes.
▲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 if they become blocked by dust.

Form #4420110
Oct 2019 -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......................................................................................................................................... 7
7.0) Dimensions –U Tube Configurations............................................................................................13
7.1) Heater Assembly Overview –U Tube Configurations .................................................................15
8.0) Dimensions –LINEAR TUBE Configurations ...............................................................................18
8.1) Heater Assembly Overview - Linear Tube Configurations ..........................................................19
9.0) Typical Suspension Methods ..........................................................................................................22
9.1) Burner Box Support Details ............................................................................................................23
9.2) User Instruction Label......................................................................................................................23
10.0) U-Tube Heater Assembly.................................................................................................................24
10.1) LINEAR heater assembly ................................................................................................................32
10.2) Tube Coupling Details......................................................................................................................37
10.3) Attaching Burner Box Assembly ....................................................................................................39
10.4) Attaching Fan Assembly .................................................................................................................39
11.0) Gas Connections and Regulations.................................................................................................40
11.1) Instructions for Pressure Test Gauge Connection.......................................................................42
12.0) Electrical Connections .....................................................................................................................44
13.0) Venting and Fresh Air for Combustion ..........................................................................................46
14.0) Heater Operation..............................................................................................................................51
14.1) Sequence of Operation....................................................................................................................52
14.2) Lighting and Shutdown Instructions..............................................................................................52
15.0) Cleaning and Annual Maintenance ...............................................................................................53
17.0) Troubleshooting Guide ....................................................................................................................55
18.0) Replacing Parts ................................................................................................................................57
18.1) Removal of Electrodes ....................................................................................................................57
18.2) Removing Main Burner....................................................................................................................58
18.3) Removing Injector ............................................................................................................................58
18.4) Removing Ignition Control ..............................................................................................................59
18.5) Removing Air Switch........................................................................................................................59
18.6) Removing Gas Valve and Manifold Assembly .............................................................................60
18.7) Removing Neon Indicator ...............................................................................................................60
18.8) Removing Air Inlet Plate .................................................................................................................61
18.9) Removing the Fan ............................................................................................................................61
19.0) Conversion Instructions...................................................................................................................62
20.0) Installation Data...............................................................................................................................62
21.0) Replacement Parts Guide...............................................................................................................63

Form #44201100
-2- Oct 2019
1.0) SAFETY
This heater is a self-contained infrared radiant tube heater. 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 52kg.
Supply the owner with a copy of these Installation and Operation Instructions.
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.
3.0) GENERAL INFORMATION
This heater is a self-contained infrared radiant tube heater designed for use where flammable gases or vapors
are not generally present.
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 UK all equipment must be installed and maintained in
accordance with the relevant provisions of the Gas Safety (Installations and Use) Regulations 1998 for gas fired
products. Installation practices must take into account the Health and Safety at Works Act 1974 or relevant
codes of practice. In addition the installation must be carried out in accordance with the current IEE wiring
regulations BS 7671-latest revision, BS 6896-latest revision (Industrial & Commercial) and any other relevant
British Standards and Codes of Practice by a qualified installer. All external wiring MUST comply with the current
IEE wiring regulations.
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, the installer must post signs that will
“specify the maximum permissible stacking height to maintain the required clearances from the heater to
combustibles.”
Every heater shall be located with respect to building construction and other equipment so as to permit access
to the control housing. Each installer shall use skillful and reliable installation practices when locating the
heaters and must give consideration to service accessibility.
This heater is for INDOOR INSTALLATION ONLY and 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.

Form #4420110
Oct 2019 -3-
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.
Linear Configuration Series Only: Since linear configuration tube heaters are always hotter at the control end
than at the flue terminal end, always observe the minimum recommended mounting heights.
Fig. 1

Form #44201100
-4- Oct 2019
4.0) MINIMUM CLEARANCES TO COMBUSTIBLES
Minimum clearances to combustibles shall be measured from the outer surfaces as shown in the following
diagram:
Fig. 2
Table 1
MINIMUM CLEARANCES TO COMBUSTIBLES
Side
Above
Below
End
Front
Rear
ADU25, ADL25
510mm
450mm
1220mm
510mm
610mm
305mm
ADU30-45, ADL30-45
760mm
610mm
2285mm
610mm
760mm
380mm
▲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 32ºC above ambient temperature. Clearances to combustibles are posted on the
control box. In areas used for storage of combustible materials where they may be stacked below the heater, It
is recommended 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 32 ºC above room temperature.
Building materials with a low heat tolerance (such as plastics, vinyl 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 #4420110
Oct 2019 -5-
5.0) SPECIFICATIONS
Table 2
MODEL
ADU25/ADL25-N
ADU25/ADL25-L
Heat Input
23.0 kW Hs 20.7 kW Hi
Appliance Type (II2H3P)
A2, B22, C12, C32, C52
Appliance Category
II2H3P
Adjusted for
2H G20 20mbar
3P G31 37mbar
Setting Pressure
12.5mbar
25mbar
Injector
Ø3.8mm
No. 39
Burner Baffle Plate
PN 4260360C
Fan Air Restrictor Plate
None
Electrical Supply
230V~50Hz 125W
Fuse Externally
3A
Dimensions
ADU25: 5.385m x 0.465m
ADL25: 10.065m x 0.34m
Weight
ADU25: 47kg ADL25: 46kg
Gas Connection
R - ½
Flue Size
Ø100mm
Table 3
MODEL
ADU30/ADL30-N
ADU30/ADL30-L
Heat Input
29.2 kW Hs 26.3 kW Hi
Appliance Type (II2H3P)
A2, B22, C12, C32, C52
Appliance Category
II2H3P
Adjusted for
2H G20 20mbar
3P G31 37mbar
Setting Pressure
12.5mbar
25mbar
Injector
No. 19
No. 34
Burner Baffle Plate
PN 4260360D
Fan Air Restrictor Plate
PN 42741170
Electrical Supply
230V~50Hz 125W
Fuse Externally
3A
Dimensions
ADU30: 5.51m x 0.715m
ADL30: 9.955m x 0.34m
Weight
ADU30: 66kg
ADL30: 62kg
Gas Connection
R - ½
Flue Size
Ø100mm
Table 4
MODEL
ADU35/ADL35-N
ADU35/ADL35-L
Heat Input
34.5 kW Hs 31.1 kW Hi
Appliance Type (II2H3P)
A2, B22, C12, C32, C52
Appliance Category
II2H3P
Adjusted for
2H G20 20mbar
3P G31 37mbar
Setting Pressure
12.5mbar
25mbar
Injector
No. 15
Ø3.1mm
Burner Baffle Plate
PN 426036L
Fan Air Restrictor Plate
None
Electrical Supply
230V~50Hz 125W
Fuse Externally
3A
Dimensions
ADU35: 5.51m x 0.715m
ADL35: 9.955m x 0.34m
Weight
ADU35: 66kg
ADL35: 62kg
Gas Connection
R - ½
Flue Size
Ø100mm

Form #44201100
-6- Oct 2019
Table 5
MODEL
ADU40/ADL40-N
ADU40/ADL40-L
Heat Input
42.2kW Hs 38.0kW Hi
Appliance Type (II2H3P)
A2, B22, C12, C32, C52
Appliance Category
II2H3P
Adjusted for
2H G20 20mbar
3P G31 37mbar
Setting Pressure
12.5mbar
25mbar
Injector
Ø5.0mm
Ø3.3mm
Burner Baffle Plate
PN 4260360T
Fan Air Restrictor Plate
None
Electrical Supply
230V~50Hz 125W
Fuse Externally
3A
Dimensions
ADU40: 6.97m x 0.715m
ADL40: 13.00m x 0.34m
Weight
ADU40: 81kg
ADL40: 79kg
Gas Connection
R - ½
Flue Size
Ø100mm
Table 6
MODEL
ADU45/ADL45-N
ADU45/ADL45-L
Heat Input
47.0 Kw Hs 42.3 Kw Hi
Appliance Type (II2H3P)
A2, B22, C12, C32, C52
Appliance Category
II2H3P
Adjusted for
2H G20 20mbar
3P G31 37mbar
Setting Pressure
12.5mbar
25mbar
Injector
Ø5.4mm
No. 28
Burner Baffle Plate
PN 4260360U
Fan Air Restrictor Plate
None
Electrical Supply
230V~50Hz 125W
Fuse Externally
3A
Dimensions
ADU45: 6.97m x 0.715m
ADL45: 13.00m x 0.34m
Weight
ADU45: 81kg
ADL45: 79kg
Gas Connection
R - ½
Flue Size
Ø100mm
Table 6a Flue Data
Model
Flue Gas
Mass Flow
Rate (kg/s)
Flue
Pressure
(Pa)
Flue Gas
Temperature
(°C)
ADU/ADL
25
N
0.0134
12-15
135-185
ADU/ADL
25
L
0.0135
12-15
135-185
ADU/ADL
30
N
0.0161
15-20
120-170
ADU/ADL
30
L
0.0162
15-20
120-170
ADU/ADL
35
N
0.0188
17-22
190-240
ADU/ADL
35
L
0.0189
17-22
190-240
ADU/ADL
40
N
0.0215
22-28
160-210
ADU/ADL
40
L
0.0216
22-28
160-210
ADU/ADL
45
N
0.0242
25-35
225-275
ADU/ADL
45
L
0.0243
25-35
225-275

Form #4420110
Oct 2019 -7-
6.0) PACKING LIST
6.1 ADU25
The appliances are supplied as follows:
Table 7
REF. NO.
PART NO.
DESCRIPTION
ADU25
Carton (containing the following)
1
Fastenings Pack (not shown)
1
1
Burner Box Assembly
1
2
44438010
Fan Assembly –3” (less air plate)
1
3
42764000
U-Bend
1
4
42773100
Hanger Bracket
3
4a
42773000
U-Bolt (included in fastenings pack)
6
5
30462990
Torctite Coupling
2
6
42766000
Radiant Tube (Ø 76.2 x 4572)
2
7
42763080
Reflector Panel (2438 long)
4
8
42762010
Reflector End Cap - Notched
1
9
42761010
Reflector End Cap - Plain
1
10
44436180
Reflector Spacer Bracket
3
11
44152248
Turbulator (65mm x 572mm)
4
12
44437810
Side Panel (2057mm)
4
12a
44437180
Side Panel (457mm) (not shown)
2
12b
44437011
Side Panel (45mm) (not shown)
2
13
44441000
Side Panel Holder Bracket
6
ADU25 Fig. 3

Form #44201100
-8- Oct 2019
6.2 ADU30/35
The appliances are supplied as follows:
Table 8
REF. NO.
PART NO.
DESCRIPTION
ADU30
ADU35
Carton (containing the following)
1
1
Fastenings Pack (not shown)
1
1
1
Burner Box Assembly
1
1
2
44438020
Fan Assembly –4” (with air plate)
1
1
3
42913000
U-Bend
1
1
4
42898100
Hanger Bracket
3
3
4a
42873000
U-Bolts (included in fastenings pack)
6
6
5
30462980
Torctite Coupling
4
4
6
41932100
Radiant Tube (Ø 101.6 x 3048)
2
2
7
41932050
Radiant Tube (Ø 101.6 x 1524)
2
2
8
42894100
Reflector Panel 3035 long)
2
2
9
42894080
Reflector Panel (2540 long)
2
2
10
42895100
Reflector End Cap - Notched
1
1
11
42896100
Reflector End Cap - Plain
1
1
12
44436280
Reflector Spacer Bracket
3
3
13
44152240
Turbulator (90mm x 610mm)
10
4
14
44437810
Side Panel (2057mm)
4
4
14a
44437280
Side Panel (711mm) (Not Shown)
2
2
14b
44437061
Side Panel (160mm) (Not Shown)
2
2
15
44441000
Side Panel Holder Bracket
6
6
ADU30/35 Fig. 4

Form #4420110
Oct 2019 -9-
6.2 ADU40/45
The appliances are supplied as follows:
Table 9
REF. NO.
PART NO.
DESCRIPTION
ADU40
ADU45
Carton (containing the following)
1
1
Fastenings Pack (not shown)
1
1
1
Burner Box Assembly
1
1
2
44438510
Fan Assembly –4” (less air plate)
1
1
3
42913000
U-Bend
1
1
4
42898100
Hanger Bracket
4
4
4a
42873000
U-Bolts (included in fastenings pack)
8
8
5
30462980
Torctite Coupling
4
4
6
41932100
Radiant Tube (Ø 101.6 x 3048)
4
4
7
42894100
Reflector Panel 3035 long)
2
2
8
42894080
Reflector Panel (2540 long)
2
2
9
42894050
Reflector Panel (1511 long)
2
2
10
42895100
Reflector End Cap - Notched
1
1
11
42896100
Reflector End Cap - Plain
1
1
12
44436280
Reflector Spacer Bracket
4
4
13
44152240
Turbulator (90mm x 610mm)
8
5
14
44437960
Side Panel (2438mm)
4
4
14a
44437280
Side Panel (711mm) (Not Shown)
4
4
14b
44437061
Side Panel (160mm) (Not Shown)
2
2
15
44441000
Side Panel Holder Bracket
8
8
ADU40/45 Fig. 5

Form #44201100
-10- Oct 2019
6.3 ADL25
The appliances are supplied as follows:
Table 10
REF. NO.
PART NO.
MODEL
ADL25
Carton (containing the following)
1
Fastenings Pack (not shown)
1
1
Burner Box Assembly
1
2
44438010
Fan Assembly –3” (less air plate)
1
3
43318100
Hanger Brackets
6
3a
42770000
U-Bolts (included in fastenings pack)
6
4
30462990
Torctite Coupling
3
5
42766000
Radiant Tube (Ø 76.2 x 4572)
2
6
43319100
Reflector Panel (3035 long)
6
7
43319020
Reflector Panel (610 long)
2
8
43320050
Reflector End Cap
2
9
44436130
Reflector Spacer Bracket
6
10
44152248
Turbulator (65mm x 572mm)
6
11
44437960
Side Panel (2438mm)
6
11a
44437250
Side Panel (635mm) (not shown)
4
11b
44437011
Side Panel (45mm) (not shown)
4
12
44441000
Side Panel Holder Bracket
12
ADL25 Fig. 6

Form #4420110
Oct 2019 -11-
6.4 ADL30/35
The appliances are supplied as follows:
Table 11
REF. NO.
PART NO.
MODEL
ADL30
ADL35
Carton (containing the following)
1
1
Fastenings Pack (not shown)
1
1
1
Burner Box Assembly
1
1
2
44438020
Fan Assembly –4” (with air plate)
1
-
2a
44438030
Fan Assembly –4” (less air plate)
-
1
3
43318100
Hanger Bracket
6
6
3a
42873000
U-Bolts (included in fastenings pack)
6
6
4
30462980
Torctite Coupling
4
4
5
41932100
Radiant Tube (Ø 101.6 x 3048)
3
3
6
43319100
Reflector Panel (3035 long)
6
6
7
43319020
Reflector Panel (610 long)
2
2
8
43320050
Reflector End Cap
2
2
9
44436130
Reflector Spacer Bracket
6
6
10
44152240
Turbulator (90mm x 610mm)
9
4
11
44437960
Side Panel (2438mm)
6
6
11a
44437250
Side Panel (635mm) (not shown)
4
4
11b
44437061
Side Panel (160mm) (Not Shown)
4
4
12
44441000
Side Panel Holder Bracket
12
12
ADL30/35 Fig. 7

Form #44201100
-12- Oct 2019
6.5 ADL40/45
The appliances are supplied as follows:
Table 12
REF. NO.
PART NO.
MODEL
ADL40
ADL45
Carton (containing the following)
1
1
Fastenings Pack (not shown)
1
1
1
Burner Box Assembly
1
1
2b
44438510
Fan Assembly –4” (less air plate)
1
1
3
43318100
Hanger Bracket
7
7
3a
42873000
U-Bolts (included in fastenings pack)
7
7
4
30462980
Torctite Coupling
5
5
5
41932100
Radiant Tube (Ø 101.6 x 3048)
4
4
6
43319100
Reflector Panel (3035 long)
8
8
7
43319020
Reflector Panel (610 long)
2
2
8
43320050
Reflector End Cap
2
2
9
44436130
Reflector Spacer Bracket
7
7
10
44152240
Turbulator (90mm x 610mm)
8
4
11
44437960
Side Panel (2438mm)
8
8
11a
44437360
Side Panel (914mm) (not shown)
4
4
11b
44437061
Side Panel (160mm) (Not Shown)
4
4
12
44441000
Side Panel Holder Bracket
14
14
ADL40/45 Fig. 8

Form #4420110
Oct 2019 -13-
7.0) DIMENSIONS –U TUBE CONFIGURATIONS
Fig. 9
Fig. 10

Form #44201100
-14- Oct 2019
Fig. 11

Form #4420110
Oct 2019 -15-
7.1) HEATER ASSEMBLY OVERVIEW –U TUBE CONFIGURATIONS
Fig. 12

Form #44201100
-16- Oct 2019
Fig. 13

Form #4420110
Oct 2019 -17-
Fig. 14

Form #44201100
-18- Oct 2019
8.0) DIMENSIONS –LINEAR TUBE CONFIGURATIONS
Fig. 15

Form #4420110
Oct 2019 -19-
8.1) HEATER ASSEMBLY OVERVIEW - LINEAR TUBE CONFIGURATIONS
The heater lengths for each input are shown in Section 5.0). Insure that all reflector screws and clips are in place
to prevent the reflectors from separating during expansion and contraction of the heater. The heater should be
suspended to provide a slope of 0.25 degree up to the fan.
Fig. 16