Nortek Ambirad Vision VSX Installation guide

Doc No. 700016 Page of 16
Part No. 700016
Nortek Global HVAC (UK) Limited, Fens Pool Avenue, Brierley Hill, West Midlands, DY5 1QA
WARNINGS
Nortek Global HVAC (UK) Ltd 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. Due account should also be taken of any obligations arising from 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), BS 6896 (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.
AAMBIMBIRRADAD VVISIONISION VSXVSX
RRADIANTADIANT TTUBEUBE HHEATEREATER
AASSEMBLYSSEMBLY IINSTRUCTIONNSTRUCTION MMANUALANUAL
INDEX Section
Introduction and Document Index
Installation Requirements -------------------------------------------------- 1
Assembly Instructions------------------------------------------------------- 2
User and Operating Instructions------------------------------------------ 3

Doc No. 700016 Page 2 of 16
Document Index.
1 Installation Requirements
1.1 Health & Safety
1.2 Model Definitions
2 Assembly Instructions
2.1 Tools Required
2.2 Assembly Notes
2.2.1 Turbulators
2.2.2 Brackets
2.2.3 Tube Alignment Sections
2.2.4 Couplers
2.2.5 Reflectors
2.2.6 Burner/Heat Exchanger Assembly
2.3 Identification Check List
2.4 Prior to Assembly
2.5 Step by Step Installation
2.5.1 Tubes and Turbulators
2.5.2 Brackets, U Bolts and U Bend
2.5.3 Reflectors
2.5.4 End Caps
2.5.5 Canopies
2.5.6 Canopy End Caps
2.5.7 General
2.6 Detailed Assembly Drawings
3 User and Operating Instructions
3.3 To Start Heater
3.2 To Switch off Heater
3.3 Routine Maintenance Between Service Intervals
3.4 Frequency of Servicing
1. Installation Requirements.
Isolate any electrical supply to the
heater and controller before proceeding. Practice by a qualified installer. Isolate all
electrical supplies to the heater & controller
before proceeding.
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.
1.2 Model Definitions
VSXUT = Ambirad Vision High efficiency U
Tube heater with painted powered burner, deep
profile stainless steel reflector and end caps,
reflector canopy and end caps in Aluzink.
1.1 Health and Safety
Nortek gas fired heaters must be installed in
accordance with the relevant provisions of the
Gas Safety (Installations and Use) Regulations
1998. Due account should also be taken of any
obligations arising from 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), BS 6896
(Industrial & Commercial) and any other
relevant British Standards and Codes of
Introduction.
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 familiarise yourself with the
components and tools you require at the various
stages of assembly.
All Dimensions shown are in mm unless
otherwise stated.
The manufacturer reserves the right to alter
specifications without prior notice.
Welcome to the range of high efficiency
AmbiRad Vision radiant tube heaters. Local
regulations may vary in the country of use and
it is the installers responsibility to ensure that
such regulations are satisfied.
All installation, assembly, commissioning and
service procedures must be carried out by
suitable qualified competent persons to the
statutory regulations in the country of use.
When assembling, installing, commissioning
and servicing is undertaken on radiant tube
heaters specified in these instructions, due care

Doc No. 700016 Page 3 of 16
Suitable alternative tools may be used.
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.
2.1 Tools Required.
The following tools and equipment are advisable
to complete the tasks laid out in this manual.
Pozidrive
Screwdriver
Trestles
Leather
Faced
Gloves
Tape
Measure
Spanner
Set
4 & 5mm
Allen keys
2.2.4 Reflectors.
All reflectors AND canopies must be
positioned/attached to the brackets exactly
as detailed in the assembly drawings.
Remove the protective plastic coating.
2.2.5 Couplers.
Locate and position tube couplers at the end of
the tubes. Ensure socket heads are facing
outwards & the pre-fitted bolts in the couplers
line up with the locating holes in the tubes.
Ensuring the bolts are not over tightened.
2.2 Assembly Notes.
2.2.1 Turbulators
Ensure the correct length and quantity are
inserted into their respective correctly
identified tube(s) as detailed in the assembly
drawings.
2.2.2 Brackets
Tighten clamping ‘U’ bolt arrangement to
tubes ONLY WHERE STATED on the
assembly drawings.
Please read these assembly notes in
conjunction with the correct assembly
drawings (figs 7 to 10).

Doc No. 700016 Page 4 of 16
COLOUR CODE VSX2M
20/25/30
VSX3M
30/35/40/
45
VSX4M
45/50
U Bend
Inner
Reflectors
Outer
Canopy
Heat
Exchanger
1x 1x
1x 1x
COLOUR CODE VSX2M
20/25/30
VSX3M
30/35/40/
45
VSX4M
45/50
1x 1x
2x 3x
2x 3x
Inner End
Caps
Outer
Canopy
End Caps
Tubes
Couplers
2x 2x
2x
2x 2x
2x 3x
2x 2x
Brackets
3x 4x
Burner
8x6x
2.3 Identification check list
2x
1x
1x
1x
4x
4x
5x
2x
2x
4x
3x
4x
10x
M8
Full Nut 16x 22x 28x
No.5
Torque
Screw 13x 14x 15x
Turbulators
2.2.6 Burner and Heat Exchanger
Assembly.
Slide the burner assembly onto the RIGHT
HAND TUBE when viewed from above,
ensuring it is fully engaged.
Slide heat exchanger onto the LEFT HAND
TUBE when viewed from above, ensuring it
is fully engaged. The hose connections
should face vertically.
Secure both assemblies with grub screws.
M8 U Bolt
M6
Mudwasher M4 x 10
Pozi Setpin
16x 8x 12x 7x 20x 9x

Doc No. 700016 Page 5 of 16
2
Locate and position tubes on trestles. 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
2.5 Step by step installation.
2.5.1 Tubes and Turbulators
2x 2x 2x
0x 0x 2x
VSX50 only: Locate & position the two shorter
tubes and affix to tubes using couplers. Keeping
the tubes in line, tighten the couplers evenly until
the tubes cannot be turned in the couplers.
0x 0x 2x
COLOUR CODE VSX2M
20/25/30
VSX3M
30/35/40/
45
VSX4M
45/50
COLOUR CODE VSX2M
20/25/30
VSX3M
30/35/40/
45
VSX4M
45/50
M4
Full Nut 1x 2x
M6
Washer
M6
Full Nut
M6 x 35
Setpin
M4
Washer
M6 x 15
Setpin
6x
10x
6x
4x
6x
4x
7x
2x
8x
4x
8x
14x
8x
3x
9x
6x
2.4 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.
Methodology: To cater for the expansion of the firing leg, all U bolts on the firing leg (except the one
closest to U bend) are to be loose as described below. All reflectors, tubes, brackets and canopies
are bolted together.

Doc No. 700016 Page 6 of 16
DO NOT tighten
any of the nuts at
this stage.
4
2.5.2 Brackets, U Bolts and U bend.
3x 4x L/H tube
R/H tube
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
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.
3
CAUTION — SHARP EDGES!
2x 3x 3x
5x
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
5
2x
1x
6
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. Refer to sketch below..

Doc No. 700016 Page 7 of 16
Remove protective film before starting.
Reflectors are supplied pre-punched and
are universal throughout the VSX series.
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
6” (150mm), slide bracket along tubes to adjust,
then tighten U bolts on the end bracket.
2.5.3 Reflectors.
2x 3x
7
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
8
Repeat this procedure referring to the
assembly diagram for quantities used on specific
models, but noting that the final bracket is not
bolted to the reflector. (See photo)
10
At this stage all the U bolts should be
fully tightened.
3x
2x
Slide 2nd bracket to line up with innermost
slotted hole in 1st reflector, & bolt together using
M6 x 35mm pins, washers & nuts. Bolt 1st & 2nd
reflectors together using end elongated holes in
each. Refer to notes ‘W’, ‘X’, ‘Y’ and Z in fig.12 for
further details.
9
4x 4x 4x

Doc No. 700016 Page 8 of 16
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
2.5.4 End Caps
Using M4 setpins & washers fix the blank end
cap beneath the reflector profile at the U bend end
with the flanges facing outwards.
3x 3x
3x 3x
1x 2x
1x 2x
12
13
3x 3x
3x 3x
2x 2x
11
3x
3x
3x
3x
3x
2x
3x
3x
2.5.5 Canopies
Remove protective film before starting.
Slide the outer canopies over the reflectors from
the U bend end ensuring correct location in
reflector profile. Line up burner end canopy flush
with burner end reflector. Overlap canopies as
shown in the assembly diagram.
CAUTION — SHARP EDGES!
2x 3x
14
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
15
4x
3x

Doc No. 700016 Page 9 of 16
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.
2.5.6 Canopy End Caps
16
2x 2x
12x 12x
CAUTION — SHARP EDGES!
17
1x 1x 1x 1x
2.5.7 General
2x
12x
1x 1x
2.6 Detailed Assembly Drawings
The following pages show the technical
dimensional details of the VSX heaters.
Please note the heater type, length and
reference number from the delivery/advice note
before identifying the correct model drawing.
Refer to figure 12 for details of ‘W’, ‘X’, ‘Y’ and
‘Z’ fastening and locations.

Doc No. 700016 Page 10 of 16
Figure 1. VSX2M 20/25/30
2600mm (20kW ONLY); 3400mm (25/30KW) TURBULATORS
976mm TURBULATOR
COUPLER 1365mm 1650mm
50 mm O/LAP
50mm O/LAP
38mm
150
4047mm REFERENCE
3400mm TUBE
Y
Z
X
Z
Z W
Y Y