Ambirad VSUS User manual

OWNERS MANUAL
INSTALLATION / OPERATION / MAINTENANCE
Applies to: Model VSUS & VSLUS
120V 60Hz
Gas-Fired, Tubular, Radiant,
Low-Intensity Infrared Heater
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, injury or death. Read the installation,
operating and maintenance instructions thoroughly
before installing or servicing this equipment.
Part # 700110
OWNERS MANUAL

Introduction.
Document Index.
1: Installation Requirements
1.1 Health & Safety
1.2 Heater Suspension
1.3 Wall Mounting
1.4 Clearance to Combustibles
1.5 Gas Connection & Supply Details
1.6 Electrical Connections
1.7 Ventilation Requirements
1.7.1 Unvented Units
1.7.2 Vertical Venting
1.7.3 Horizontal Venting
1.8 Fresh Air Intake
1.9 Technical Details
2: Assembly Instructions
2.1 Tools Required
2.2 Assembly Notes
2.2.1 Tubes
2.2.2 Turbulators
2.2.3 Brackets
2.2.3.1 U-Tube Heaters
2.2.3.2 Tube Alignment Sections
2.2.3.3 Linear 3” SL Tube Heaters
2.2.3.4 Linear - 4” SL Tube Heaters
2.2.4 Couplers
2.2.5 Reflectors
2.2.6 U-Bend
2.2.7 Bends
2.2.8 End Caps
2.2.9 Burner Assembly
2.2.10 Fan Assembly
2.2.11 Heater Configurations
3: Start Up Instructions
3.1 Tools Required
3.2 Start up procedure
4: Servicing Instructions
4.1 Tools Required
4.2 Burner Description
4.3 Burner Removal
4.4 Burner Gas Injector Servicing
4.5 Burner Head and Electrode Servicing
4.6 Combustion Fan Assembly
4.7 Radiant Tube Servicing
4.8 Reflector Servicing
4.9 Sweeping of Vent
4.10 Re-commissioning after Service
5: Spare parts
6: Troubleshooting Guide
7: Replacing Parts
7.1 Burner Controller Replacement
7.2 Air Pressure Switch Replacement
7.3 Gas Valve Replacement
8: Optional Extra Kits
9: User and Operating Instructions
9.1 To Start Heater
9.2 To Switch Off Heater
9.3 Servicing
and attention is required to ensure that working
at height regulations are adhered to.
PLEASE READ this document prior to
installation to familiarize yourself with the
components and tools you require at the various
stages of assembly.
All dimensions shown are in inches unless
otherwise stated.
The manufacturer reserves the right to alter
specifications without prior notice.
Welcome to the new range of vacuum infra-red
heaters. Local regulations may vary and it is the
installer’s responsibility to ensure that such
regulations are satisfied.
All installation, assembly, commissioning and
service procedures must be carried out by
suitably qualified competent persons and
conform with local building codes, or in the
absence of local codes, with the National Fuel
Gas Code ANSI Z223.1/NFPA 54.
When assembling, installing, commissioning
and servicing is undertaken on radiant tube
heaters specified in these instructions, due care
2

1.2 Heater Suspension
Attachment to the heater support lugs should be
made by a D shackle. The hanging attachments
to overhead steelwork etc. must be purpose
made to good sound engineering practice or of
a proprietary type supplied by others.
They must be adequately fixed and designed to
carry the whole weight of the heater. In the
event of suitable roof steelwork being
unavailable, additional steelwork should be fitted
to enable vertical hangers to be used for
suspending the heaters.
These methods are illustrated in Figure 1. If
there are any doubts as to the strength or
suitability of roof steelwork to which heaters are
suspended, please refer to a Consultant,
Architect, structural engineer, or owner of the
building.
It is recommended that the heater is raised to its
final position once the assembly of the tube/
bracket/reflector has been completed. Longer
tube assemblies may be raised in more than
one sub-assembly with final tube connections
made in the air.
1.3 Wall Mounting
These radiant tube heaters can be wall mounted
using the appropriate bracket.
When using the wall mounting brackets the
heater must be inclined at an angle between 35°
and 55°, when side wall (perimeter) reflectors
are not used.
1. Installation Requirements.
3
1.1 Health and Safety
A. Heaters are intended for heating
non-residential indoor spaces and should
only be installed where flammable gases
or vapors are not generally present.
B. Heaters may be suspended either
horizontal or at an angle, or may be wall
mounted. See section 1.5 for clearance
dimensions.
C. The installation must conform with local
building codes or, in the absence of local
codes, with the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 or the Natural
Gas and Propane Installation Code, CSA
B149.1.
D. The unit shall be electrically grounded in
accordance with National Electric Code
ANSI/NFPA 70 and Canadian Electrical
Code CSA C22.1.
E. The heater may be installed in aircraft
hangars in accordance with the Standard
for Aircraft Hangars, ANSI/NFPA 409,
and in automotive garages in accordance
with the Standard for Parking Structures,
ANSI/NFPA 88A, or the Standard for
Repair Garages, ANSI/NFPA 88B,, or
the Canadian Natural Gas and Propane
Installation Code, CSA B149.1, and are
so marked.
Ensure that minimum clearances will be
maintained to vehicles parked below the
heater.
F. The standard heaters are approved for
installations between 0 - 2000ft
(0 - 610m) for the US and 0 - 4500 ft
(1370m) for Canada. Conversion kits are
available on installations above these
heights in the USA.
If not installed, operated and maintained in accordance with the manufacturer’s instructions,
this product could expose you to substances in fuel, or from fuel combustion, which are
known to the state of California to cause cancer, birth defects or other reproductive harm.
WARNING:

4
Figure 1. Recommended Methods of Heater Suspension.
DROP ROD 55° SUSPENSION
BEAM CLAMPS
3/8"Ø ROD
TUBE
REFLECTOR
BRACKET
EYE HOOK
NOTE: HOOKS ARE TO
BE CLOSED UP
AFTER ASSEMBLY
OPTIONAL
TURNBUCKLE
(±3"ADJUSTMENT)
2/0 GA CHAIN
(TWISTED LINK,
PLATED)
EYE HOOKS
2/0 GA CHAIN
(TWISTED LINK,
PLATED)
CHAIN
('U' TYPE SHOWN)
*
*
Vertical suspension chain ideal. Where
supports are inclined, maximum
recommended angle of inclination is 15°. Where chain supports
have an angle of inclination greater than 15° an equal and opposite support is recommended.
15° max.
ON U TUBE VARIANTS THE HEATER SHOULD SLOPE DOWNWARDS TOWARDS THE RETURN BEND AND ON
LINEAR VARIANTS SHOULD SLOPE DOWNWARDS TOWARDS BURNER BY APPROX. ½” FOR BOTH
HORIZONTAL AND WALL MOUNTED INSTALLATIONS.
*These angles
to be equal
and not more
than 45°.
PURLIN FASTNERS
It is recommended that on linear variants, at least the first suspension bracket should be supported by 2 chains to prevent the heater tilting.

Table 1
Clearance to Combustibles, inches (cm)
Model B
B1 C1 C2 C3 D** D1 D2 E
UT SL UT SL UT SL
40 63 (160) 49 (125) 25 (64) 48 (122) 41 (105) 10(26) /
16(41)*
10(26) /
16(41)* 8 (21) 10 (26) 48(122) /
14(36)** 18 (46) 20 (51) 10 (26)
60 66 (168) 66 (168) 30 (77) 48 (122) 41 (105) 10(26) /
16(41)*
10(26) /
16(41)* 8 (21) 10 (26) 48(122) /
14(36)** 18 (46) 20 (51) 10 (26)
80 72 (183) 72 (183) 30 (77) 48 (122) 41 (105) 10(26) /
16(41)*
10(26) /
16(41)* 8 (21) 10 (26) 48(122) /
14(36)** 18 (46) 20 (51) 10 (26)
100 72 (183) 72 (183) 32 (82) 48 (122) 41 (105) 10(26) /
16(41)*
10(26) /
16(41)* 8 (21) 10 (26) 48(122) /
20(51)** 18 (46) 20 (51) 10 (26)
125 74 (188) 74 (188) 39 (99) 48 (122) 47 (120) 10(26) /
16(41)*
10(26) /
16(41)* 8 (21) 10 (26) 48(122) / 20(51)** 18 (46) 20 (51) 10 (26)
150 78 (199) 86 (219) 39 (99) 48 (122) 48 (122) 10(26) /
17(44)*
10(26) /
17(44)* 8 (21) 10 (26) 48(122) /
28(72)** 18 (46) 28 (72) 10 (26)
170 86 (219) 86 (219) 48 (122) 48 (122) 48 (122) 10(26) /
17(44)*
10(26) /
17(44)* 11 (28) 10 (26) 48(122) /
40(102)** 18 (46) 28 (72) 10 (26)
200 86 (219) 86 (219) 48 (122) 48 (122) 48 (122) 10(26) /
17(44)*
10(26) /
17(44)* 11 (28) 10 (26) 48(122) /
40(102)** 18 (46) 28 (72) 10 (26)
A
SL UT SL SL
1.4 Clearance to Combustibles.
Minimum clearance to combustibles are shown in Figures 2a/2b. Use in conjunction with Table 1 below.
IMPORTANT:
The stated clearance to combustibles represents a surface temperature of 90°F (50°C) above room temperature.
Building material 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 not subject to such degradation.
5
WARNING:
Minimum clearance from the heater must be maintained from vehicles parked below heater.
In all situations, clearances to combustibles must be maintained. Signs should be posted in
storage areas to specify maximum stacking height to maintain required clearance to
combustibles. Such signs must either be posted adjacent to the heater thermostats or in the
absence of such thermostats in a conspicuous location. Refer to mounting clearance tables.
*unvented ** with end caps

Figure 2a Clearance to Combustibles (U-Tube Variants).

The minimum clearances to combustible materials are given in the tables below. These
minimum distances MUST be adhered to at all times. Adequate clearance MUST be provided
around air openings into the combustion chamber and there MUST be suitable clearance for
accessibility and for combustion / ventilating air supplies.
B
B
Side
vented
A
End view.
Below
heater
A
0° to 55°
Angled view.
C2(*)
C1(*)
E
Burner end.
Above
Reflector
(unvented)
Above
Burner
Service
distance
U Bend end.
NOTE: Ensure that there is adequate provision
in the building for combustion and ventilation
air supply. Installation must meet minimum
requirements and appliciable codes.
* unvented
D
B1
Ensure burner is
mounted on
bottom tube
when angle
mounting
Side unvented
6
Ensure that there is adequate
provision in the building for
combustion and ventilation air supply.
Installation must meet minimum
requirements and appliciable codes.
WARNING!
applicable

7
Figure 2b Clearance to Combustibles (Linear Tube Variants).

The minimum clearances to combustible materials are given in the tables below. These
minimum distances MUST be adhered to at all times. Adequate clearance MUST be provided
around air openings into the combustion chamber and there MUST be suitable clearance for
accessibility and for combustion / ventilating air supplies.
B
A
0° to 55°
Angled view.
Side
vented
A
End view.
Below
heater
B
Outlet end. B1
C2
C3
E
D2
D2
Ensure that there is adequate
provision in the building for
combustion and ventilation air
supply. Installation must meet
minimum requirements and
appliciable codes.
Burner end.
Above
Reflector
Above
Burner
Service
distance
C1 (*)
Above
outlet
Outlet end.
D1
* unvented
end
unvented
Optional
90° bend
Optional
U bend
Ensure that there is adequate
provision in the building for
combustion and ventilation air supply.
Installation must meet minimum
requirements and appliciable codes.
WARNING!
applicable

1.5 Gas Connection and Supply
The gas connection to the heater is ½” N.P.T
internal thread.
Injector sizes and manifold pressure for the
burners are shown in Section 1.9. The gas
supply piping and connections must be installed
so that the recommended pressure stated is
achieved.
A gas shut off valve and union should be fitted
in the gas supply line close to the heater and a
⅛” N.P.T plugged tapping, accessible for test
gauge connection, provided immediately
upstream of the appliance gas inlet.
It is essential to provide some flexibility in the
final gas connection by use of an approved
flexible gas connector. See Fig 4.
Take care when making a gas connection
to the heater not to apply excessive turning
force to the internal controls.
Care must be taken to observe the minimum
pipe bend diameter (minimum 10” - 250mm,
maximum 14” - 350mm) & pipe expansion
distance (minimum 1⅛” - 28mm, maximum
3¾”) - 95mm.
The correct installation as shown will allow
for approx 4” of movement due to
expansion.
WARNING: Before installation, check
that the local distribution conditions,
nature of gas and pressure, and adjustment
of the appliance are compatible.
Figure 3. Correct orientation of Ball Valve
Gas Flow
Gas Flow
Figure 4. Correct Installation of Flexible
Gas Connection
8
WARNING: FIRE OR EXPLOSION HAZARD - Expansion of the radiant pipe occurs with
each firing cycle causing the burner to move with respect to the gas line. This can
result in a gas leak producing an unsafe condition. It is therefore essential to provide some
flexibility in the final gas line connection by use of an approved armoured flexible
connector or stainless steel expansion loop as shown in the drawings.

1.6 Electrical Connections
This appliance must be electrically grounded
Supply 120V 60Hz single phase.
Standard heater 0.16HP.
Current rating 1.2 amp max (inductive).
Fuse: external 3 amp.
Important: All electrical work should be done by
a qualified electrician in strict accordance with
the National Electrical Code ANSI/NFPA 70 or
Canadian Codes CSA C22.1.
The electrical supply to the heater is by three
wires: live, neutral and ground connections.
Install in accordance with all state & local codes.
Where alternative manufacturers controls are
used, please refer to their instructions for siting
and installation details.
Table 3 Gas Supply Pressures
Gas Type Natural Gas LP/Propane Gas
Required Gas Pressure (in W.C) 60,000 to 150,000 btu 5.0 11.0
Required Gas Pressure (in W.C) 170,000 to 200,000 btu 7.0 11.0
Max Supply Pressure (in W.C) 14.0 14.0
Gas Supply Connection ½” N.P.T thread
Switch with
Fuse
Fan plugs
into burner
Figure 5.a Typical U-Tube Range Wiring Connections
WARNING: Before making electrical
connections, switch OFF the main
electrical disconnect. There may be more
than one disconnect switch. Lock out
and tag switch with a suitable warning
label. Electrical shock can cause
personal injury or death.
9
Figure 5.b Typical Linear Range Wiring Connections
Switch
with Fuse

If any of the original wire as supplied with the appliance must be replaced, it
must be replaced with wiring material having a temperature rating of at least 220°
10
Figure 5d. Single Heater Installations 24V Control
L1
Gas Control
MV
X
C
COM
W1
PS0
PS1
IND
R
BK
R
Y
K
BR
GR
BL
K
Y
R
T
24V Thermostat
RW1
C
X
METHOD:-
Cut and strip pink cables linking terminals W1 and R
Attach thermostat wires using suitable wire nuts. KEY:
BL - BLUE
BK - BLACK
BR - BROWN
GR - GREY
K - PINK
R - RED
Y - YELLOW
T
Figure 5e. Multiple Heater Installations 24V Control
Supply circuit
120V 60Hz 1 Ph
S-0700
C
40VA
Trans
Relay
L1
G
R
L2 L2
L1 (HOT)
GND
T
24V Thermostat
other burners
Burner 1
RW1
C
Fan center relay
(Suppled by others)
30
KEY:
G - GREEN
W - WHITE
BK - BLACK
R - RED
G
R W
BK
BK
T
W
BK
Figure 5c. Single and Multiple Heater Installations 120V Control
120V Thermostat
Supply circuit
120V 60Hz 1 Ph
L2
L1 (HOT)
GND
other burners
Burner 1
T
110V Thermostat
KEY:
G-GREEN
W-WHITE
BK-BLACK
BK
G
W
W
BK
G
BK
T

11
LN
G
120V AC Fan 120V/60Hz AC
Supply
L1
Gas Control
MV
X
C
COM
W1
PS0
PS1
IND
R
Gas Valve
C
M
E
NOTES:-
Power On light is permanently illuminated when 120V / 60 Hz AC external supply is connected
to burner.
Additional wiring is required to install an optional extra thermostat and / or time clock.
If no thermostat is required then a jumper is fitted between terminals R and W1. In this
configuration the burner will continuously fire until the 120V power supply is disconnected.
Wire specification:- 18 AWG (1.0mm²), Tri-rated, 105°C
Pressure Switch
120v/24VAC 60Hz
Transformer
Power ON (red)
Burner ON (amber)
BK
R
Y
K
BR
GR
BL
KEY:
BL - BLUE
BK - BLACK
BR - BROWN
GR - GREY
G - GREEN
K - PINK
R - RED
W - WHITE
Y - YELLOW
K
Y
R
YY
R
W
G
BK
W
G
BL BR
RGR
R
GR
G
BR
BL
W
BK
G
Figure 5d. Internal burner wiring diagram

1.7 Ventilation Requirements
1.7.1 Unvented units
Heaters may be installed without a vent
providing the governing building codes are met
and consideration is given to possibilities of
condensation on cold surfaces.
Installation shall meet the following
requirements when unvented:
 Natural or mechanical means shall be pro-
vided to supply and exhaust at least 4 CFM
per 1000 BTU per hour input of installed
heaters.
 Combustion gases shall not impinge on
combustible materials.
1.7.2 Vertical venting
The heater can be installed with a vertical vent.
All vent piping should be adequately supported
from the building structure and terminated with
an approved terminal. The maximum
recommended vent length is 25ft (7.6m) with
a maximum of two elbows. All connections
should be properly sealed. Refer fig 6a.
1.7.3 Horizontal venting
Individual units can be vented horizontally
through side walls. Recommended terminals
are Part Numbers V0700 for 4” and V0800 for
6”.
Distances from adjacent public walkways,
adjacent buildings, opening windows and
building openings, consistent with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installation Code,
CSA B149.1.
Maximum length of vent is 25ft (7.6m) with two
90° elbows.
Runs of 12ft (3.6m) or shorter can use
4” (101mm) dia vent. Runs over 12ft (3.6m)
should use 6” (152mm) vent pipe.
Any portion of vent that passes through a
combustible wall must be insulated, or use an
approved insulating thimble.
Standard vent terminals must extend at least
6” (152mm) from the wall and at least
24” (609mm) from any combustible overhang.
This protects the building material from
degradation by the vent gases.
Vent joints should be sealed and secured
according to the vent manufacturers
instructions. Should condensation occur the
vent should be shortened or insulated.
The terminal should be at least 3ft (0.91m) away
from any air intake to the building.
If the heater is equipped with ducted combustion
air, the vent terminal must be at least 3ft
(0.91m) away from the air inlet and located
higher than the inlet.
The vent terminal must be installed at a suitable
height above the ground to prevent blockage by
snow.
1.8 Fresh Air Intake
Whenever the heater is installed in locations
where airborne dust or other pollutants are
present, a fresh air supply should be ducted to
the burner.
A fresh air duct of 4” (101mm) dia. should be
installed from the fresh air source to the air
intake connection on the burner housing. A
flexible jointing piece should be installed at the
burner connection (see optional extra kits
Section 8) with hose clamps to facilitate
expansion and contraction.
The maximum recommended length air duct is
25ft (7.6m) and the maximum number of elbows
is two. The minimum length is 18” (456mm).
The fresh air duct inlet must be located where it
will receive dust free clean air. An inlet cap with
bird screen must be fitted at the inlet of the duct.
If the duct inlet is located above the roof the
underside of the inlet terminal must be at least
2ft(0.61m) above roof level and at least
10” (254mm) above any projection on the roof
within 7ft (2.1m) of the inlet. Intake pipe Fittings
and sealant are not supplied by the
manufacturer. Refer to Figs. 6c & d.
12

Figure 6.a Vertical Venting.
Figure 6.b Horizontal Venting.
Figure 6.c Fresh Air Ducted Intake. Figure 6.d Wall Terminal Intake Kit.
13
NOTE: The vent
terminal should be
installed so as to be in
the same atmospheric
pressure zone as the
combustion air inlet of
the appliance
INLET WITH
6" (152mm)
SEAL JOINTS WITH
SILICONE OR DUCT TAPE
WALL
BIRD SCREEN
TERMINAL
36" (914mm) MIN CENTERS
ALUMINUM 4" (101.6mm) O.D. PIPE
CLAMPS
4" (106mm) O.D. FLEXIBLE DUCT
BURNER
MAX LENGTH = 25'-0" (7.62m) WITH 2-90° LONG RADIUS BENDS
REFLECTOR
END OF RADIANT TUBE
FAN
12'-0" (3.66m)
12'-0" (3.66m)
(APPROXIMATE
MAXIMUM DIMENSIONS)
CODE APPROVED VENT
THROUGH ROOF
SEAL
SUPPLIED BY OTHERS
ROOF
HIGH TEMPERATURE SILICONE
SEAL JOINTS WITH
4" (101mm) O.D. OR
6" (152mm) O.D. FLUE
ALUMINUM
REQUIRED ONLY FOR 6" (152mm) DIA. VENT
4" (101mm) TO 6" (152mm) DIA. ALUMINUM ADAPTER
VENT CAT 1
REFLECTOR
TERMINAL
6" (152mm)
COLLAR
SEAL JOINTS WITH
HIGH TEMPERATURE
WALL
SUPPLIED BY OTHERS
SILICONE
INLET WITH
BIRD SCREEN
36" (914mm)MIN CENTERS
FAN
4" (101mm) TO 6" (152mm) DIA. ALUMINUM ADAPTER
REQUIRED ONLY FOR 6" (152mm) DIA. VENTS
ALUMINUM 4" (101mm) O.D. MAXIMUM LENGTH = 12'-0" (3.66m)
ALUMINUM 6" (152mm) O.D.MAXIMUM LENGTH = 25'-0" (7.62m)
(PLUS A MAXIMUM OF 2 x 90° BENDS
PLAN VIEW
SIDE VIEW
NOTE: The vent terminal must NOT be
installed below the fresh air intake.

1.9 Technical Details
No of Injectors 1
Gas Connection ½” N.P.T nipple.
Electrical Supply 120 volt 1 phase 60Hz
Vent size (in) 4” or 6”
Unitary Fan Motor Details 120 volt 1 phase 60Hz
Current Rating 1.2A MAX
Ignition Electronic Program Start up with Spark Ignition
14
Burner
Size Natural Gas Min. Heater
Length Max. Heater Length
Min. Heater
Length Max. Heater Length
BTU/Hr S ft (m) S ft (m) U ft (m) U ft (m)
40 45,720 20 (6.1) 30 (9.1) 20 (6.1) 30 (9.1)
60 60,000 20 (6.1) 40 (12.1) 20 (6.1) 40 (12.1)
80 80,000 25 (7.6) 40 (12.1) 30 (9.1) 40 (12.1)
100 100,000 30 (9.1) 50 (15.2) 34 (10.4) 34 (10.4)
125 125,000 40 (12.1) 60 (18.3) 34 (10.4) 44 (13.4)
150 150,000 40 (12.1) 60 (18.3) 34 (10.4) 44 (13.4)
170 175,000 50 (15.2) 70 (21.3) 44 (13.4) 64 (19.5)
200 200,000 50 (15.2) 80 (24.4) 54 (16.5) 74 (22.6)
Tube Size
Inches (mm)
3 (76)
3 (76)
3 (76)
4 (101)
4 (101)
4 (101)
4 (101)
4 (101)
Burner Orifice
Plate Injector Combustion Fan
Details Pressure Switch Burner Head
Part No. Part No. Fan
Type Support Spinning Part No. Part No.
40 201063-65 201007-13
2576T
201845
201676 200988
60 201063-36 201007-15 201841
80 201063-64 201007-18 201841
100 201063-70 201007-21 FSER38UK
125 201063-26 201007-24
2560-1
FS100-4H-60DE
150 201063-25 201007-30 FS100-4H-66DE
170 201063-24 201631-25 FS100-4H-70DE
200 201063-71 201631-32 FS100-4H-96DE
Burner
Size
0- 2000 ft (0-610m)

15
USA Natural Gas 0– 2000 ft (0-610m)
Size 60 80 100 125 150 170 200
“WC 3.7 3.2 2.7 3.6 3.4 4.4 2.7
40
3.4
USA Natural Gas 2001- 4000 ft (611-1220m)
Size 60 80 100 125 150 170 200
“WC 3.5 3.0 2.6 3.4 3.2 4.2
40
3.2 2.6
CANADA Natural Gas 0- 2000 ft (0-610m)
Size 60 80 100 125 150 170 200
“WC 3.7 3.2 2.7 3.6 3.4 4.4 2.7
40
3.4
CANADA Natural Gas 2001– 4500 ft (611-1370m)
Size 60 80 100 125 150 170 200
“WC 3.5 3.0 2.6 3.4 3.2 4.2 2.6
40
3.2
Model U Tube Straight Tube
U20 U30 U40 U35 U45 U55 U65 U75 S20 S25 S30 S40 S50 S60 S70 S80
40 ●●
●●●
60 ●●●
●●●●
80 ●●●●●
100 ●●●●
125 ●●●●●
150 ●●●●●
170 ●●●●●●
200 ●●●●●●●
Tube Type Material Linear Heater Min.
Distance to Bend
ft (m)
U-Tube Linear All Heaters
Aluminized
(or superior) Aluminized (or superior) Mild Steel (or superior)
40 TUBE 1 TUBE 1 REMAINDER 10 (3.0)
60 TUBE 1 TUBE 1 REMAINDER 10 (3.0)
80 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
100 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
125 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
150 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
170 TUBE 1 TUBE 1 & 2 REMAINDER 30 (9.1)
200 TUBE 1 TUBE 1 & 2 REMAINDER 30 (9.1)
Model
USA Natural Gas 0– 2000 ft (0-610m)
Size 60 80 100 125 150 170 200
“WC 3.7 3.2 2.7 3.6 3.4 4.4 2.7
40
3.4
USA Natural Gas 2001- 4000 ft (611-1220m)
Size 60 80 100 125 150 170 200
“WC 3.5 3.0 2.6 3.4 3.2 4.2
40
3.2 2.6
CANADA Natural Gas 0- 2000 ft (0-610m)
Size 60 80 100 125 150 170 200
“WC 3.7 3.2 2.7 3.6 3.4 4.4 2.7
40
3.4
Model U Tube Straight Tube
U20 U30 U40 U35 U45 U55 U65 U75 S20 S25 S30 S40 S50 S60 S70 S80
40 ●●
●●●
60 ●●●
●●●●
80 ●●●●●
100 ●●●●
125 ●●●●●
150 ●●●●●
170 ●●●●●●
200 ●●●●●●●
Tube Type Material Linear Heater Min.
Distance to Bend
ft (m)
U-Tube Linear All Heaters
Aluminized
(or superior) Aluminized (or superior) Mild Steel (or superior)
40 TUBE 1 TUBE 1 REMAINDER 10 (3.0)
60 TUBE 1 TUBE 1 REMAINDER 10 (3.0)
80 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
100 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
125 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
150 TUBE 1 TUBE 1 REMAINDER 20 (6.1)
170 TUBE 1 TUBE 1 & 2 REMAINDER 30 (9.1)
200 TUBE 1 TUBE 1 & 2 REMAINDER 30 (9.1)
Model
OPTIONS
1 All standard units fitted with unvented vent, natural gas and stainless steel or aluminized reflectors.
2 1 off 180° ‘U’ bend or up to 2 off 90° ‘L’ bends can be fitted at no less than 50% of the total heater length.
3 5ft tube kit (linear only).
4 4” (101mm) or 6” (152mm) vent terminal.
5 Combustion air kit.
6 Altitude conversion kit.
7 Stainless steel or aluminized steel reflectors.
8 End caps.

16
Model number BTU/Hr Combustion tube
length (ft) Radiant tube length (ft)
40U20 3 45,720
10 (1-CC) 10 (1-MS)
60U20 3 60,000
40U30 3 42,720
10 (1-CC) 10 (1-MS)
10 (2#5’-MS)
60U30 3 60,000
80U30 3 80,000
100U35 4 100,000
10 (1-AS) 10 (1-MS)
14 (2#7’-MS)
125U35 4 125,000
150U35 4 150,000
60U40 3 60,000
10 (1-CC) 30 (3#10’-MS)
80U40 3 80,000
125U45 4 125,000
10 (1-AS)
150U45 4 150,000
170U45 4 175,000 10 (1-AS)
5 (1-AS)
10 (1-MS)
5 (1#5’-MS)
14 (2#7’-MS)
170U55 4 175,000
20 (2#10’-AS) 20 (2#10’-MS)
14 (2#7’-MS)
200U55 4 200,000
170U65 4 175,000
20 (2#10’-AS)
20 (2#10’-MS)
10 (2#5’-MS)
14 (2#7’-MS)
200U65 4 200,000
200U75 4 200,000 10 (2#10’-AS) 40 (4#10’-MS)
14 (2#7’-MS)
10 (1-MS)
10 (2#5’-MS)
14 (2#7’-MS)
Table 7a: U-Tube Heater Tube Materials
Tube nomenclature:
CC 4”-3” Combustion tube
AS Aluminum coated steel
MS Mild steel

Model number Tube
diameter BTU/Hr Combustion tube
length (ft) Radiant tube length (ft) Min distance to bend (ft)
40S20 3 45,720
10’ (1-CC) 10’ (1-MS) 10’
60S20 3 60,000
40S25 3 45,720
10’ (1-CC) 10’ (1-MS)
10’ (2#5’-MS)
10’
60S25 3 60,000
80S25 3 80,000 20’
40S30 3 45,720
10’ (1-CC) 10’
60S30 3 60,000
80S30 3 80,000 20’
100S30 4 100,000 10’ (1-AS) 20’ (2#10’-MS) 20’
60S40 3 60,000
10’ (1-CC) 30’ (3#10’-MS)
10’
80S40 3 80,000
100S40 4 100,000
10’ (1-AS) 30’ (3#10’-MS) 20’
125S40 4 125,000
150S40 4 150,000
100S50 4 100,000
10’ (1-AS) 40’ (4#10’-MS) 20’
125S50 4 125,000
150S50 4 150,000
170S50 4 175,000
20’ (2#10’-AS) 30’ (3#10’-MS) 30’
200S50 4 200,000
125S60 4 125,000
10’ (1-AS) 50’ (5#10’-MS) 20’
150S60 4 150,000
170S60 4 175,000
20’ (2#10’-AS) 40’ (4#10’-MS) 30’
200S60 4 200,000
170S70 4 175,000
20’ (2#10’-AS) 50’ (5#10’-MS) 30’
200S70 4 200,000
200S80 4 200,000 20’ (2#10’-AS) 60’ (6#10’-MS) 30’
20’ (2#10’-MS)
20’
Table 7b: Linear Heater Tube Materials
Tube nomenclature:
CC 4”-3” Combustion tube
AS Aluminum coated steel tube
MS Mild steel tube
17

18
2. Assembly Instructions.
2.2.2 Turbulators
All models include a turbulator or a set of
turbulators. Carefully insert turbulator(s) inside
the tube up to the end tab.
2.2.3 Brackets
2.2 Assembly Notes.
2.2.1 Tubes
Each heating unit has two types of emitter
tubes. See Table 7a and 7b of this manual.
Identify and position tubes on saw horses. All
tubes should be positioned with seams
facing down when installed. Position coupling
fastener so that these cannot be seen from
beneath the heater.
3” heater versions have a 4” diameter burner
spigot welded at one end. Ensure this tube
assembly is correctly positioned as shown on
the assembly drawings.
Where necessary, mark out the position of the
bracket centres from the dimensions shown on
the assembly drawings.
PLEASE READ this section prior to
assembly to familiarize yourself with the
components and tools you require at the
various stages of assembly. Carefully open the
packaging and check the contents against the
parts and check list.
The manufacturer reserves the right to alter
specifications without prior notice.
Please ensure that all packaging is
disposed of in a safe environmentally
friendly way.
For your own safety we recommend the
use of safety boots and leather faced
gloves when handling sharp or heavy items. The
use of protective eye wear is also
recommended.
Phillips
Screwdriver
Saw
Horses
Leather
Faced
Gloves
Tape
Measure

5/16”
Drive
Cordless
Drill
Wrench
Set
2.1 Tools Required.
The following tools and equipment are advisable
to complete the tasks laid out in this manual.
Suitable alternative tools may be used.
Please read these assembly notes in
conjunction with the correct assembly
drawings (figs 10 to 27).
3/16” (5mm)
5/32” (4mm)
Allen wrench
Turbulator lengths and positioning
inside the tube vary between models.
Always ensure correct turbulator is
fully inserted into the correct tube
and from the correct end. Failure to
ensure this practice could cause the
heater to fail.
Turbulator dimensions and positioning
are indicated on individual assembly
drawings (fig.10 to fig.27).
Always ensure correct bracket is
used. Bracket type and positioning are
indicated on individual assembly
drawings (fig.10 to fig.27).

19
 Type ‘B3’ is a sliding reflector suspension
bracket and NOT fastened to the reflector.
An oversized extra long ‘floating U bolt’ with
‘stop nuts’ is located on the 4” burner tube
ONLY as indicated and bolted into position.
Clearance of 1/8” must be provided above
the tube to allow for thermal expansion.
 Type ‘C’ is a reflector support bracket to
retain the reflector (certain UT models).
Slip the brackets onto the tubes in correct order
and fix at correct points as shown on the
relevant assembly drawing.
Ensure fixings are tight to brackets
2.2.3.2 Tube alignment sections
(For 170 & 200 U-Tube Angle Mounted
Installations ONLY).
To allow for differential expansion of the tubes,
a tube alignment assembly is fitted to the first
bracket on the fan side radiant tube.
Position U bolt tube alignment sections over the
tube and through bracket prior to clamping.
2.2.3.1 U-Tube Heaters
 Type ‘A2’ is a fixed reflector suspension
bracket, tabbed with reflector fixing points.
An extra long ‘floating U bolt’ with ‘stop
nuts’ is located on the firing tube ONLY as
indicated and bolted into position.
Clearance of 1/8” must be provided above
the tube to allow for thermal expansion.
 Type ‘A3’ is a fixed reflector suspension
bracket, tabbed with reflector fixing points.
An oversized extra long ‘floating U bolt’
with ‘stop nuts’ is located on the 4” burner
tube ONLY as indicated and bolted into
position.
Clearance of 1/8” must be provided above
the tube to allow for thermal expansion.
This bracket is ALWAYS closest to the
burner.
 Type ‘B’ is a sliding reflector suspension
bracket and NOT fastened to the reflector.
 Type ‘B2’ is a sliding reflector suspension
bracket.
An extra long ‘floating U bolt’ with ‘stop
nuts’ is located on the firing tube ONLY as
indicated and bolted into position.
Clearance of 1/8” must be provided above
the tube to allow for thermal expansion.
Note. The first bracket, ‘A3’ on 3” UT
heaters have an oversized ‘U’ bolt on
the burner leg to accommodate the 4”
burner spigot.

20
2.2.3.4 Linear - 4” SL Tube Heaters
 Type ‘A’ is a fixed reflector suspension
bracket, tabbed with reflector fixing points.
This bracket is ALWAYS closest to the
burner.
 Type ‘B’ is a sliding reflector suspension
bracket and NOT fastened to the reflector.
They are fixed at regular intervals down the
length of the tube.
 Type ‘F’ is a fixed reflector support bracket
and are fixed to the reflector via set screws.
 Type ‘S’ is a sliding reflector support
bracket and NOT fastened to the reflector
which allow the reflector to move within.
Slip the brackets onto the tubes in correct order
and fix at correct points as shown on the
relevant assembly drawing.
Ensure fixings are tight to brackets
2.2.3.3 Linear 3” SL Tube Heaters
 Type ‘A1’ is a fixed reflector suspension
bracket, tabbed with reflector fixing points.
An oversized ‘U’ bolt is located on the 4”
burner tube only as indicated and bolted
into position.
This bracket is ALWAYS closest to the
burner.
 Type ‘B’ is a sliding reflector suspension
bracket and NOT fastened to the reflector.
They are fixed at regular intervals down the
length of the tube.
 Type ‘F’ is a fixed reflector support bracket
and are fixed to the reflector via set screws.
 Type ‘S’ is a sliding reflector support
bracket and NOT fastened to the reflector
which allow the reflector to move within.
Slip the brackets onto the tubes in correct order
and fix at correct points as shown on the
relevant assembly drawing.
Ensure fixings are tight to brackets
Note. The first bracket, ‘A1’ on 3” UT
heaters have an oversized ‘U’ bolt on
the burner leg to accommodate the 4”
burner spigot.