Ambirad Vision VSXUS 90 Datasheet

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.
ASSEMBLY, INSTALLATION & SERVICING
MANUAL FOR AMBIRAD VSXUS
INFRA-RED HEATERS
INDEX Section
Introduction and Document Index
Installation Requirements ------------------------------------------------1
Assembly Instructions -----------------------------------------------------2
Start Up Instructions -------------------------------------------------------3
Servicing Instructions ------------------------------------------------------4
Spare Parts ------------------------------------------------------------------5
Troubleshooting Guide ---------------------------------------------------6
Replacing Parts -------------------------------------------------------------7
User and Operating Instructions ---------------------------------------8

2
Introduction.
Document Index.
1 Installation Requirements
1.1 Health & Safety
1.2 Packing and Shipping Information
1.3 Heater Suspension
1.4 Wall Mounting
1.5 Clearance to Combustibles
1.6 Gas Connection & Supply Details
1.7 Electrical Connections
1.8 Ventilation Requirements
1.8.1 Unflued Units
1.8.2 Vertical Venting
1.8.3 Horizontal Venting
1.8.4 Fresh Air Intake
1.9 Flue & Combustion Air Inlet
1.10 Technical Details
2 Assembly Instructions
2.1 Tools Required
2.2 Identification Check List
2.3 Prior to Assembly
2.4 Assembly Instructions
2.4.1 Turbulators
2.4.2 Brackets, U bolts and U bend
2.4.3 Reflectors
2.4.4 End Caps
2.4.5 Canopies
2.4.6 Canopy End Caps
2.4.7 General
2.4.8 Detailed Assembly Drawings
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 Heat Exchanger Servicing
4.9 Reflector Servicing
4.10 Sweeping of Flue
4.11 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 User and Operating Instructions
8.1 To Start Heater
8.2 To Switch Off Heater
8.3 Servicing
and servicing is undertaken on radiant tube
heaters specified in these instructions, due care
and attention is required to ensure that working
at height regulations are adhered to at the
mounting heights specified.
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 high efficiency
AmbiRad VSXUS 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
suitable 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 or the
National Gas and Propane Installation Code
CSA B149.1
When assembling, installing, commissioning
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury or
death. Read the instructions thoroughly
before installing of servicing this
equipment.

3
1.1 Health and Safety
A. Heater is 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 A3 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
accordance with National Electric Code
ANSJJNFPA 70-1987.
E. The heater may be installed in aircraft
hangars installed in accordance with the
Standard for Aircraft Hangars, ANSI/
NFPA 409 and in automotive garages
when installed 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.
1.2 Packing and Shipping Information
See section 2 for assembly drawings. Material
list with part numbers and descriptions for each
part will accompany each shipment.
Heaters include: Options:
Burner/Control
Heat Exchanger
Radiant Tubes
Reflectors/Canopies
Brackets Ball Valve
Fan Vent Hoods
U-Bend Hanging Assembly
Flex Gas Connector* (Chain etc)
Tube Couplings
* Connector must comply with ANSI Z21.24/CSA 6.10.
Shipping packages for individual projects will be
boxed and crated as outlined in the specific bill
of lading.
1.3 Heater Suspension
Attachment to the heater support lugs should be
made by a ‘speed link’, D shackle or in the case
of drop rods, a closed formed hook. The
hanging attachments to overhead steelwork
etc. must be purpose made to good sound
engineering practice or of a proprietary type
fixing. 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
to be suspended, please refer to a Consultant,
Architect 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 connection
made in the air.
The suggested mounting heights for AmbiRad
heaters are given in table 1 below.
1.4 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°.
Table 1. Recommended Mounting Heights
Model Mounting Height (ft)
Standard Inclined
min recommended min recommended
90 14 16 12 13
140 16 18 14 15
1. Installation Requirements.

4
** *
Figure 1. Recommended Methods of Heater Suspension.
Were chain supports have an
angle of inclination greater than
15° an equal and opposite
support is recommended.
Vertical suspension chain ideal. Where supports are inclined max. recommended angle of inclination 15°
Shackle method of attachment. Pin must be tightened by pliers
Drop rod with formed hook. n.b. hook or eyebolt must be closed tight after installation.
Alternative method of suspending ‘U’ tube and linier type heaters.
IMPORTANT: THE HEATER SHOULD SLOPE DOWNWARDS TOWARDS THE RETURN BEND
BY APPROX. 10mm FOR BOTH HORIZONTAL AND WALL MOUNTED INSTALLATIONS.
15° max
VSX models
Vertical orinclined suspension on this plane is acceptable.
*
*
Ensure that there is adequate provision in the building for combustion and ventilation air supply. Installation must meet minimum requirements and applicable codes.

5
1.5 Clearance to Combustibles.
The minimum clearances to combustible materials are given in the tables below. These
minimum distances MUST be adhered to at all times.
Figure 2 Diagram illustrating the clearance to combustibles
VSXUS90 (ins) VSXUS140 (ins)
Below Tubes A 82 90
To the Sides B 35 35
Above Reflector C1 4 4
Above Burner / Heater Outlet Vented C2 20 20
Above Burner / Heater Outlet Unvented C3 24 24
Behind Burner D1 32 42
Behind Burner with Vent connected D2 24 24
End Wall F 21 21
Table 2. Clearances to combustibles VSXUS
C1
B
E
A
C2 or C3
D1
or
D2
B B
A
VSX models
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. Refer to mounting clearance tables.
WARNING:

6
1.6 Gas Connection and Supply
The gas connection on the heater is ½”N.P.T
external thread.
Injector sizes and manifold pressure for the
burners are shown in the table 3. The gas
supply piping and connections must be installed
so that the minimum 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 preferably by use of an
approved flexible gas connector or stainless
steel expansion loop.
Take care when making a gas connection
to the heater not to apply excessive turning
force to the internal controls.
Depending on the specific installation, the
flexible gas hose may be routed to the gas cock
at any of the following angles in relation to the
burner:
Care must be taken to observe the minimum
pipe bend diameter (minimum 10”, maximum
14”) & pipe expansion distance (minimum 1⅛”,
maximum 3¾”).
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
WARNING: CONNECTOR MUST BE INSTALLED IN A “U” CONFIGURATION. USE
ONLY THE 36” LONG CONNECTOR OF ½” NOMINAL ID THAT WAS
FURNISHED WITH THIS HEATER.

7
1.7 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.
It is recommended that the electrical circuit
controlling the heater or group of heaters
include thermostats and if required manual
control switches. All such controls and switch
gear must be rated to handle the total inductive
load of the circuit they control. For large
installations the use of relays or contactors
should be considered.
Control panels are available from the
manufacturer incorporating multiple Black Bulb
Thermostats controlling up to 10 heaters per
thermostat for zone control of the heated area.
(Control Panels
are not A.G.A/CSA
design certified)
Where alternative
manufactures’
controls are used,
please refer to
their instructions
for their siting and
installation details.
Table 3 Gas Supply Pressures
Gas Type Natural Gas
Max Supply Pressure (in W.C) 10.0
Min inlet gas supply (in W.C) 7.0
Gas Supply Connection ½” N.P.T internal thread
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.
Switch with
Fuse
Fan plugs into burner
Figure 5. Typical VSXUS Wiring Connections
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 - preferably by use of an approved armoured
flexible connector or stainless steel expansion loop as shown in the drawings.

8
MAIN J.S.T.
BROWN
GREY
BLACK
FLAME SENSOR
IGNITOR
8
7
91110 12
13
24PURPLE
BLACK
LAMPS
ON
BURNER
YELLOW
GREY
BROWN
GREEN
BROWN
SOLENOID VALVE
SWITCH
N.C.
N.O.
C.
BROWN
BURNER
POWER INPUT
LN
FAN
N
L
ON
POWER
WHITE
WHITE
WHITE
WHITE
WHITE
VACUUM
BROWN
13
2
VALVE
J.S.T.
GREEN
WHITE
GREEN
YELLOW
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°F/105°C
Heater 1 Heater 2 Heater 3 Heater 4 Heater 5 Heater 6
Double pole insulator
adjacent to each
heater
Thermostats
Zone 1 Zone 2
Zone 1 Zone 2
Time
switch Manual
switch
L
N
G
Frost Thermostat
120v
1ph 60Hz
(Two Zones)
*
**
Double pole
fuse isolator
{
Figure 7. External Wiring Schematic.
Figure 6. Internal Burner Wiring Diagram.

9
1.8 Vent Requirements and Details
1.8.1 Unvented units
Heaters maybe installed without a vent
providing the governing building codes are met
and consideration is properly given to
possibilities of condensation on cold surfaces.
Installation shall meet the following
requirements when unvented:
• Internal volume of the heated room must
be greater than 214cu.ft. per 100 BTU/
HR of heaters installed.
OR
• Natural or mechanical means shall be
provided to supply and exhaust at least 4
CFM per 1000 BTU per hour input of in-
stalled heaters.
• Combustion gasses shall not impinge on
combustible materials with a temperature
in excess of 150°F.
1.8.2 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. All connections should
be properly sealed. refer fig 7a
1.8.3 Horizontal venting
Individual units can be vented horizontally
through side walls. Venting must be installed in
accordance with ANSI Z223.1 (NFPA-54) and
local codes. Recommended terminals are
AmbiRad V0700 for 4” and V0800 for 6” vent.
Maximum length of vent is 25ft with 2 - 90° long
radius elbows.
Runs of 12ft or shorter can use 4” dia vent.
Runs over 12ft should use 6” flue 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”
from the wall and at least 24” from any
combustible overhang. Protect the building
material from degradation by the vent gasses.
Vent joints should be sealed and secured using
at least 3 sheet metal screws. Should
condensation occur the vent should be
shortened or insulated.
The terminal should be at least 3ft 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 away
from the air inlet and located higher than the
inlet.
The vent terminal must be protected from
blockage by snow. Refer fig 7a & b
1.8.4 Fresh Air Intake
Whenever the heater is installed in locations
where airbourne dust or other pollutants are
present, a fresh air supply should be ducted to
the burner.
A fresh air duct of 4” dia. Should be installed
from the fresh air to the air intake connection on
the fan housing. A flexible jointing piece should
be installed at the fan connection with hose
clamps to facilitate expansion and contraction.
The maximum recommended length air duct is
25ft and the maximum number of bends is 2.
The minimum length is 18”. The location of the
fresh air duct inlet must be 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 above roof
level and at least 10” above any projection on
the roof within 7ft of the inlet. Intake pipe, fittings
and sealant are not furnished by the
manufacturer. Refer fig 8c
1.9 Flue and Combustion Air Inlet -
Options
Dependent on the type of burner fitted to your
heater it is possible to have configurations of
flue and combustion air inlet options to those
shown overleaf:
• Option 1
For flued products of combustion and no
ducted air please refer to Figure 8.a.
• Option 2
For ducted air and products of combustion to
ventilated area please refer to Figure 8.b.
• Option 3
For flued products of combustion and ducted
air via concentric pipe please refer to Figure
8.c.

10
A 5ins Twin Wall Flue Pipe
B 5ins to 4ins Reducer
C 4ins Clip
D 4ins Flexible Flue
E 4ins Flexible Flue to Fan
F Heat Exchanger
G Forced Burner
Products of combustion
Products of combustion
Firing tube
Air
Inlet
If heaters are installed with no flue the
ventilation instructions detailed in section
1.8 must be applied.
Ducted air must be used in locations
where there is airborne dust or where
there is a polluted atmosphere e.g. Chlorinated
Vapours.
Maximum length = 30ft
Minimum diameter = 4in
Maximum no of bends = 2
Option 1 - Figure 8.a. Forced Burner with Heat Exchanger (Standard Flue)
For flued products of combustion and no ducted air
Refer to section 1.8.3 for Maximum
length of vent.

11
Products of
combustion to
ventilated area
Fresh
Air
Products of
combustion
Firing
tube
A Forced Burner
B Heat Exchanger
C 4ins Clips
D 4ins Flexible Flue
E 4ins Flexible Flue to Fan
F Shroud for unflued heater installation
if heaters are installed with no flue the
ventilation instructions detailed in section
1.8 must be applied.
Ducted air must be used in locations
where there is airborne dust or where
there is a polluted atmosphere e.g. Chlorinated
Vapours.
Maximum length = 30ft
Minimum diameter = 4ins
Maximum no of bends = 2
Option 2 - Figure 8.b. Forced Burner with Heat Exchanger (No External Flue)
For ducted air and products of combustion to ventilated area

12
Products of
combustion
Fresh
Air
Fresh Air
Inlet
Firing
Tube
A Concentric Flue Terminal
B 4ins Flexible to concentric flue
C 4ins Flexible to Fan
D Heat Exchanger
E 4ins Clips
F Forced Burner
G Flue Extension optional
(10ins/20ins/40ins)
Products of
combustion
if heaters are installed with no flue the
ventilation instructions detailed in section
1.8 must be applied.
Ducted air must be used in locations
where there is airborne dust or where
there is a polluted atmosphere e.g. Chlorinated
Vapours.
Maximum length = 30ft
Minimum diameter = 4ins
Maximum no of bends = 2
Option 3 - Figure 8.c. Forced Burner with Heat Exchanger (with Concentric Flue)
For flued products of combustion and
ducted air via concentric pipe
Products of
combustion
10ins
54ins
23ins9ins
Refer to section 1.8.3 for Maximum
length of vent.

13
1.10 Technical Details
Table 4 - Technical Details. All heaters to run on Natural Gas (G20)
Burner
Size
Nominal
Gross Heat
Input
Burner
Head Burner Orifice Plate Injector Injector
Pressure
BTU/Hr Part No. Part No. Part No. Inches WG.
VSXUS140 140,000 200988 201063-30 201007-30 4.5
VSXUS90 90,000 201063-26 201007-22 3.4
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
Burner
Size
Combustion Fan
Details Pressure
Switch Min. Heater
Length
Fan Type Orifice Part No. Part No. U (ft)
VSXUS140 2560-1 M101624-52 201676 17
VSXUS90 201687 3133 201676 12
2. Assembly Instructions.
PLEASE READ this section prior to
assembly to familiarise 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.
3/16” (5mm)
5/32” (4mm)
Allen
wrenchs

14
COLOUR CODE VSX90 VSX140
U Bend
Inner
Reflectors
Outer
Canopy
Heat
Exchanger
1x 1x
1x 1x
COLOUR CODE VSX90 VSX140
1x 1x
2x 3x
2x 3x
Inner
End Caps
Outer
Canopy
End Caps
Tubes
Turbulators
Couplers
2x 2x
2x 2x
2x 2x
2x 3x
2x 2x
Brackets
3x 4x M4
Full Nut 1x 2x
Burner
M6
Mudwasher
M6
Washer
M6
Full Nut
M4 x 10
Pozi Setpin
No.5
Torque
Screw
M4
Washer
M6 x 15
Setpin
M8
Full Nut
M8 U Bolt
86
16
6
10
6
8
12
4
6
4
7
7
13
2
16
8
14
4
22
M6 x 35
Setpin
2.2 Identification check list

15
2.3 Prior to assembly
• Ensure the area in which you are working is safe and clear of obstructions.
• Identify with the components in the check list and in which order they will be assembled.
• Arrange the trestles* in a straight line to allow for length of tubes.
• Remove all protective plastic from underside of Stainless Steel Reflectors / inside of End Caps.
* if saw horses cannot be located, ensure any alternative is sound and can carry the heater weight.
Locate and position tubes on trestles with the
welded seams of the tubes facing each other.
After deciding which end will have the burner, mark
out the position of the first bracket as shown in the
assembly drawings section. Slide brackets over tubes
as shown.
1
2.4 Step by step installation.
2.4.1 TUBES & TURBULATORS.
2x 2x
3
D0 NOT tighten any of the nuts at this stage.
Locate and insert turbulator(s) into tube(s)
ensuring the correct length and quantity are inserted
into the correct tube. See assembly drawings section
for location & length.
2
CAUTION — SHARP EDGES!
2.4.2 BRACKETS, U BOLTS & U BEND.
Fit the M8 U bolts over the tubes into the holes
in the bracket & loosely secure with M8 nuts &
washers, noting that all the brackets on the firing
tube (right hand) except the bracket adjacent to the
U bend should have nuts & washers on both sides
of the bracket to allow bracket to be tightened whilst
still allowing a 3mm gap for expansion between the
tube & U bolt. See assembly drawings section Fig.A.
2x 3x
3x 4x L/H tube
R/H tube

16
Working at the opposite ends of the tubes to
the burner, locate & position two couplers so that
the socket heads are facing outwards & the
pre-fitted bolts in the couplers line up with the
locating holes in the tubes. Do not fully tighten at
this stage.
2x 2x
4
Slide U bend into the open end of the couplers
ensuring the pre-fitted bolts engage in the pre-cut
holes in the U tube section. Tighten all four
clamping bolts to provide a tight grip between
tubes & U tube section.
1x 1x
Remove protective film before starting.
The reflectors supplied all have the same hole
positions, however, each end reflector should
be positioned with the holes for the end caps
(position arrowed) outermost.
Starting at the burner end, slide the reflectors
through the brackets until they are all roughly in
position along the heater, referring to the assembly
diagram showing overlaps. Measure the distance
between the end of the burner end tubes & the
centre of the end bracket, This should be
150mm, slide bracket along tubes to adjust, then
tighten U bolts on the end bracket.
2.4.3 REFLECTORS
2x 3x
6
CAUTION — SHARP EDGES!
Slide end reflector so that the innermost
slotted holes line up with 1st bracket fixing holes,
then fix in place using M6 x 35mm pins, washers
& nuts.
2x 2x
5
7

17
Repeat this procedure referring to the assem-
bly diagram for quantities used on specific mod-
els, but noting that the final bracket is not bolted
to the reflector. (See photo)
Slide 2nd bracket to line up with innermost
slotted hole in 1st reflector, & bolt together as in
step 9. Bolt 1st & 2nd reflectors together using end
elongated holes in each.
4x 4x
11
At this stage all the U bolts should be
fully tightened.
Using M4 setpins & washers fix the 'cut out'
end cap beneath the reflector profile at the
burner end with the flanges facing outwards.
Locate M4 pins, washers & nuts into holes in
overlapping reflectors as shown.
1x 2x
2.4.4 END CAPS
Using M4 setpins & washers fix the blank end
cap beneath the the reflector profile at the U bend
end with the flanges facing outwards.
3x 3x
3x 3x
1x 2x
1x 2x
11
12
3x 3x
3x 3x
2x 2x
8
10

18
2.4.5 CANOPIES
Remove protective film before starting.
Slide the outer canopies over the reflectors from
the U bend end ensuring correct location in re-
flector profile. Line up burner end canopy flush
with burner end reflector. Overlap canopies as
shown in the assembly diagram.
CAUTION — SHARP EDGES!
2x 3x
13
The heater assembly is now complete and can now be installed. We would recommend that the
burner and heat exchanger be assembled once the heater has been installed in the roof space.
Locate 6 off No.5 torque screws. Position the
blank canopy end cap with the end cap flanges
facing inwards, beneath the canopy profile at the
U bend end & fix with screws. Repeat procedure
for 'cut-out' canopy end cap, again ensuring the
flange faces inwards.
Adjust canopies so that the holes on top align
with each other as detailed in the assembly
instructions. Locate and fix one No.5 torque screw
on every canopy overlap.
1x 2x
2.4.6 CANOPY END CAPS
15
2x 2x
12x 12x
CAUTION — SHARP EDGES!
16
1x 1x 1x 1x
14
2.4.7 GENERAL

19
2.4.8 Detailed Assembly Drawings
The following pages show the technical
dimensional details of the VSXUS range of
heaters.
Please note the heater type, length and
reference number from the delivery/advice note
before identifying the correct model drawing.
Figure 9. VSXUS Heater Assembly
VSXUS140
19’ 5” REFERENCE
2” O/LAP
2” O/LAP
17’ - 1” TUBE
5’ - 5”6’ - 2”4’ - 6”
2” O/LAP 2” O/LAP
5” 6”
VSXUS90
11’ - 2” TUBE
6’ - 5” 6”
4’ - 6”
2” O/LAP
2” O/LAP
2”

20
Figure 10. VSXUS Heater Breakdown (3 module VSXUS140 shown)