Ambirad Vision VSX User manual

INDEX Section
Introduction & Document Index
Installation Requirements-------------------------------------------------1
Commissioning Instructions----------------------------------------------2
Servicing Instructions------------------------------------------------------3
Spare Parts-------------------------------------------------------------------4
Fault Finding Guide --------------------------------------------------------5
Replacing Parts -------------------------------------------------------------6
User and Operating Instructions ----------------------------------------7
SERVICING & COMMISSIONING MANUAL
FOR VISION® VSX
RADIANT TUBE HEATERS
WARNINGS
AmbiRad 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 7671:2001), BS 6896:2005
(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.

2
Document Index.
1 Installation Requirements
1.1 Health & Safety
1.2 Model definitions
1.3 Technical Details
2 Commissioning Instructions
3.1 Tools Required
3.2 Commissioning Chart
3 Servicing Instructions
3.1 Tools required
3.2 Burner Description
3.3 Burner Removal
3.4 Burner Gas Injector Servicing
3.5 Burner Head and Electrode Servicing
3.6 Combustion Fan Assembly
3.7 Radiant Tube Servicing
3.8 Heat Exchanger Servicing
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 new 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
appropriate 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
3.9 Reflector Servicing
3.10 Inspection of Flue
3.11 Re-commissioning after Service
4 Spare Parts
5 Fault Finding Guide
6 Replacing Parts
6.1 Burner Controller Replacement
6.2 Air Pressure Switch Replacement
6.3 Gas Valve Replacement
7 User and Operating Instructions
7.1 To Start Heater
7.2 To Switch off Heater
7.3 Routine Maintenance Between Service Intervals
7.4 Frequency of Servicing
1. Installation Requirements.
Isolate any electrical supply to the
heater and controller before proceeding.
relevant British Standards and Codes of
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 pro-
tective 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
AmbiRad 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 prac-
tice. In addition the installation must be carried
out in accordance with the current IEE wiring
regulations (BS 7671:2001), BS 6896:2005
(Industrial & Commercial) and any other

3
Heater
Model
Heat Input kW Gas
Flowrate
(m³/hr)
Injector
Pressure
(mbar)
Injector
Size
(mm)
Size
(h x l x w) Weight (Kg)
Fan
Rating
(A)
Fan
Type
Gross Nett
VSX20UT 20.0 18.0 1.9 10.0 1.7 450x4047x746 114 0.5 2501
VSX25UT 25.0 22.5 2.4 9.4 1.9 450x4047x746 114 1.0 2507
VSX30UT 32.0 28.8 3.1 13.0 2.0 450x4047x746 114 1.0 2507
VSX35UT 36.0 32.4 3.4 12.3 2.3 450x5927x746 158 1.0 2507
VSX40UT 40.0 36.0 3.8 12.8 2.4 450x5927x746 158 0.5 2560
VSX45UT 44.0 39.6 4.2 11.6 2.9 450x5927x746 158 0.5 2560
VSX50UT 49.5 44.6 4.7 12.8 2.5L 450x7692x746 205 0.5 2560
1.3 Table 1. Technical Details.
All heaters to run on Natural Gas (G20)
No of Injectors 1
Gas Connection ½ in BSP Internal thread
Flue Nominal Bore mm (in) 125 (5)
Unitary Fan Motor Details 230 volt 1 phase 50Hz
Table 2. Flue details
Heater Model Mass Flow Rate of Flue
Gasses (kg/s)
Flue Pressure (Pa)
Maximum Flue
Resistance Flue Gas Temp (°C)
VSX20UT 0.0116
35 - 42 190 - 250
VSX25UT 0.0132
VSX30UT 0.0133
VSX35UT 0.0166
VSX40UT 0.0173
VSX45UT 0.0196
VSX50UT 0.0220

4
2. Commissioning Instructions.
Check installation has
been carried out to these
instructions.
NO
YES
Ensure gas and electricity
supplies are isolated. Disconnect gas hose from burner
Replace burner on tube
and secure.
Open control housing and
check that all components
are securely fastened.
Close control housing
Reconnect gas hose.
Open isolating valve.
Check soundness.
Check thermostat is set to
maximum and is calling
for heat.
A successful ignition is
indicated by the amber
light illuminating and
remaining illuminated.
The heater should now
run through its start up
sequence and ignite.
Turn off power and check
that all components are
securely fastened.
Check gas
pressure.
Remove burner from tube
and inspect burner head.
(See servicing instructions)
Check operation of
air pressure switch
Leave the instructions
with a responsible
person. Injector pressure
test point. Adjustment screw under
cap to set injector pressure
Figure 1. VSX Gas Valve adjustment
These appliances should be commissioned by a qualified engineer.
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.
Small Flat
Head
Screwdriver
Manometer
Pozidrive
Screwdriver
Leather
Faced
Gloves
4mm
Allen
Key
12mm
Spanner
Large Adjustable
Spanners or 22, 26 &
27mm Spanners for
fitting of Gas Flex.
13mm
Socket
Wrench with
Extension
Switch on electrical supply.
The red neon should now
be illuminated. If restarting
heater a delay of 15s
should be allowed.
Has the
burner lit?
Check operation on
flame failure.
Check gas pressure.
Gas inlet
test point

5
3. Servicing Instructions.
A
Small Flat
Head
Screwdriver
These appliances should be serviced annually by a competent person to ensure safe
and efficient operation. In exceptional dusty or polluted conditions more frequent
servicing may be required. The manufacturer offers a maintenance service. Details
available on request
Soft
Brush
Manometer
Pozidrive
Screwdriver
Leather
Faced
Gloves
4mm
Allen
Key
Wrench with
13mm
Socket
12mm
Spanner
3.1 Tools Required.
The following tools and equipment are advisable
to complete the tasks laid out in this manual.
Suitable alternative tools may be used.
Large Adjustable
Spanners or 22, 26 &
27mm Spanners for
Fitting of Gas Flex.
A Ignition Controller
B Gas Valve
C Burner On Amber Neon
D Power On Red Neon
E Injector
F Burner Tube
G Ignitor Assembly
H Jet Carrier
I Combustion Fan
J Pressure Switch
K Gaskets
L Burner Orifice Plate
M Fan Orifice Plate
N Mains Input Filter
O Fan Connector
3.2 Burner Description.
Figure 2. Burner breakdown
C
B
D
E
F
G
K L
K
I
J
K
M
O
N

6
3.3 Burner Removal
Step 1 Isolate power and gas supplies.
Step 2 Unplug the power connectors.
Step 3 Detach the gas supply as shown below,
taking care to support the burner connection.
Step 4 If ducted air is connected, slacken
hose clip and remove the flexible hose from the
burner.
Step 5 slacken the jubilee clip attaching the
pre-heated air hose to the heat exchanger and
remove the flexible hose from the burner.
Step 6 Slacken the set screw on the burner
support casting to enable the burner to be
removed from the radiant tube.
Step 7 Remove the burner and position
the burner in a safe area to prevent the
burner or components attached to the burner
from falling to the ground.
3.4 Burner Gas Injector Servicing
Step 1.a Remove the burner support casting
and gasket.
Step 1.b The burner head assembly can be
disconnected by separating the connectors of
the ignition lead assembly and removing the
pressure switch silicon tube.

7
Step 2 The gas injector can be inspected and
replaced if contaminated or blocked.
When replacing the gas injector ensure
approved thread sealant is used.
Step 3 Reconnect ignition leads and silicone
tube to test nipple. Refit gasket and support
casting.
3.5 Burner Head and Electrode Servicing
Step 1 Check the pepper pot burner head for
contamination. If necessary this can be
removed. See below. This can be cleaned
together with the Inside of the burner head.
Step 2 The pepper pot burner head can be
replaced ensuring the 5 holes on the outer ring
are aligned alongside the probes.
Step 3 The condition of the igniter assembly can
be checked for deterioration. However, we
advise replacement at each service to ensure
continued reliability. Detach the electrode
assembly from the burner head by removing the
two screws and separating the igniter lead
connectors.
Step 4 Refit the electrode assembly and ensure
the connections are secure to prevent arcing of
the spark electrode.
Step 5 Check the positions and spark gap as
shown below.
Step 6 The burner assembly is ready to refit
after servicing the combustion fan and the
radiant tube assembly.
Ø3”
25/64”
1 7/64”
±5/64”
2 13/64” ±13/64”
7/64”
±1/64”
25/64”
3/8”
10.0°

8
3.6 Combustion Fan Assembly
Step 1 Slacken jubilee clip and remove the
flexible hose from the fan.
Step 2 Remove fan screws and unplug from
burner box.
Step 3 The combustion fan can now be
detached.
Step 4 Remove the fan orifice plate spigot and
spinning.
Step 5 Inspect the impeller and remove any
dust with a soft brush.
Step 6 Remove any dust from fan scroll and
from around the motor.
Step 7 Ensure the impeller rotates freely.
Step 8 Refit components.
3.7 Radiant Tube Servicing
Step 1 Brush any dust from the exterior of the
tubes.
Step 2 Inspect the fan and burner tubes visually.
If the tubes appear clean, skip to servicing the
reflector.
Step 3 Remove the U bend.
Step 4 Withdraw the turbulators from the
appliance. Carefully noting their condition and
position. Replace turbulators if necessary.

9
Step 5 The turbulators should be cleaned with
a soft brush.
Step 3 If required the interior of the tubes can
then be cleaned using an industrial vacuum
cleaner or by using long poles and a scraper.
Step 4 Refit components.
3.8 Heat exchanger Servicing
Step 1 Remove the flue connections
Step 2 Slacken casing support screws and
remove heat exchanger from the radiant tube.
Step 3 Remove any dust and dirt from the
heat exchanger & refit.
3.9 Reflector Servicing
The condition of the reflectors should be noted.
If necessary the reflectors can be cleaned with a
mild detergent. This can significantly improve
the efficiency of the appliance.
3.10 Sweeping of Flue
Inspect the fresh air inlet duct and vent to
ensure they are free from any blockage or
obstruction. The air inlet terminal and vent
terminal should be inspected to ensure they are
not liable to obstruction.
3.11 Recommissioning After Service
After servicing of the heater has been
undertaken, it will be necessary to
re-commission the heater as detailed in Section
3 of these instructions.

10
4. Spare Parts.
Required Spares
In order to aid troubleshooting and servicing we
recommend that the components shown in this
section should be stocked.
Note Any spare part components that are
not approved by AmbiRad could invalidate
the approval of the appliance and validity of the
warranty.
2015S
Ignition
Controller
201857
Nat Gas Valve
Twin sol reg
220/240
Part No.Description
See
section 1.10
Injector
200358
Extruded Burner
Head
Item
201284Ignitor Assembly
Part No.Description
200988Pepperpot Head
Item
2175
Amber Neon
(Burner On)
2180
Red Neon
(Mains On)
200420
Jet Carrier
(all except *)
See
Section 1.10
Combustion Fan
201488Gasket Set
201630
Jet Carrier *
VSX50 ONLY
900225-2
900225-3
900225-1
Cables:
Spark Electrode
(black)
Rectification lead
(purple)
Earth lead
(green/yellow)
201358
Flame Plate
(20/25 ONLY)
201676Pressure Switch:
201321Ducted Air Hose
7541Hose Clamp
6618T
200015T
6619T
Turbulators
Burner tube
Fan tube 25/30/50
Fan tube others

11
5. Fault Finding.
Check:
1. Integrity of spark leads
2. Integrity of electrode
assembly & spark gap
3. Burner controller
Ensure gas & electricity
supplies are enabled.
Does the RED
neon
illuminate? Check:
1. Operation of any thermostat
2. Any external fuses
3. Correct voltage is selected
YES
Does the
combustion fan
run?
Does the
amber light
illuminate after
10s purge?
If the heater still fails to
operate normally,
please contact
the AmbiRad
service department.
NO
NO
Does the
vacuum switch
`pull in`?
Check:
1. Wiring harness & plugs
2. Vacuum switch operation
3. Replace fan
Is the burner
sparking?
Does the gas
valve open?
Check:
1. Burner controller
2. Replace gas valve
Check:
1. Vacuum switch tubes
2. Emitter tubes, air inlet & flue
for obstructions
3. Operation of vacuum switch
4. Replace combustion fan
NO
YES
Check:
1. Burner controller
2. Wiring harness
3. Amber neon faulty
Check:
1. Burner inlet pressure
2. Burner nozzle pressure
3. Check live & neutral polarity
4. Check presence of good earth
YES
YES
NO
NO
YES NO
YES
Does the
amber light
illuminate for 10s
then go out?
NO
YES
YES
Is there power
on the burner?
Check:
1. Burner controller
2. Red neon faulty
YES
NO

12
6. Replacing Parts.
6.1 Burner Controller Replacement
Step 1 Slacken screw in burner lid and open the
right hand burner access door.
Step 2 Disconnect burner controller from the
wiring harness.
Step 3 Disconnect the HT Lead from burner
controller
Step 4 Remove the two screws attaching the
controller to the burner and remove.
Step 5 Fit new burner controller
Step 6 Refit HT leads and refit burner controller
to wiring harness.
Step 7 Test product and close access doors.
6.2 Air Pressure Switch Replacement
Step 1 Disconnect the two silicone impulse
tubes and three wiring connections making note
of replacement positions.
Step 2 Remove the two screws as shown below.
Step 3 The air pressure switch can now be
removed.
Step 4 Fit the new air pressure switch ensuring
the impulse tubes are connected as shown
below.
Step 5 Test product and close access doors.

13
6.3 Gas Valve Replacement
Step 1 Remove the burner assembly as
described in the section 4.3 Servicing.
Step 2 Open the left hand access door and
detach the impulse hoses from the air pressure
switch.
Step 3 Remove the 4 screws holding the burner
head onto the burner assembly and carefully
pull burner head assembly from housing.
Step 4 The burner head can now be detached
by disconnecting the impulse tube and the
burner head wiring.
Step 5 From within the combustion chamber,
remove the two screws holding the front of the
gas valve.
Step 6 Turning the housing over, remove the
four screws holding the rear burner plate in
position.
Step 7 Open the two side doors and remove the
rear plate assembly.
Step 8 Whilst the valve is still attached to the
plate, the jet carrier, gas inlet, and wiring
harness can now be detached from the gas
valve.
Step 9 The two screws retaining the gas valve
can then be removed.
Step 10 The gas valve can now be replaced.
Step 11 Refit all components in reverse order.

14
7. User & Operating Instructions.
7.1 To Start the Heater
1. Ensure gas supply is turned on.
2. Electrical supply to the controls is on.
3. Ensure that the controls are correctly set
i.e.;
• Clock is correctly set.
• Heater program is correctly set.
• Required room temp is correctly set
4. Once the heating controller ‘calls for heat’
power will be supplied to the heater(s). The
red neon will then illuminate.
5. After a pre-purge period of 10 seconds the
burner will ignite and the amber neon will
then illuminate.
6. If lockout occurs press the lockout reset
button (if available), or switch off electrical
supply and restart after 15 seconds.
7. If lockout occurs three times consecutively
switch off and isolate the gas and
electricity supplies.
Contact the AmbiRad Service department.
7.2. To Switch Off Heater
1. Switch off electrical supply to the heater.
The burner will stop and the fan will shut
off.
2. If the heater is to be switched off for
periods in excess of one week it is highly
recommended that both the gas and the
electrical supplies are turned off.
7.3. Routine Maintenance between Service
Intervals
After ensuring that the heater is cold and
mains electric isolated, cleaning of the
reflectors with a soft cloth and a mild
detergent (non solvent based cleaners only)
in water can be undertaken.
Additional removal of dust from the radiant
tubes, burner and heat exchanger can be
undertaken.
7.4 Frequency of Servicing
The manufacturer recommends that to
ensure continued efficient and safe
operation of the appliance, the heater is
serviced annually by a competent person
e.g. every year in normal working conditions
but in exceptional dusty or polluted
conditions more frequent servicing may be
required.
The manufacturer offers a maintenance
service. Details are available on request.
For Service requirements, please contact
AmbiRad.
For further technical and service support
visit our Support Information Database at
www.s-i-d.co.uk
Step 12 Ensure step screw is in the correct
position as indicated in the diagram below.
Step 13 Set gas pressures to data badge or as
per section 1.11 and ensure reliable burner
performance.
Step 14 Test product and close access doors. Step Screw
Adjustment
Document reference number GB/VS/190A/0910
AmbiRad is a registered trademark of AmbiRad Limited. Because of continuous product
innovation, AmbiRad reserve the right to change product specification without due notice
AmbiRad Limited Fens Pool Avenue
Brierley Hill West Midlands DY5 1QA
United Kingdom.
Telephone [phone]
Facsimile 01384 489707
Email [email protected]
Website www.ambirad.co.uk
Technical Support www.s-i-d.co.uk