Ambirad VISION VT Series Manuel utilisateur

Doc No. 700025 Page of 32

INDEX Section

Introduction and Document Index

Installation Requirements --------------------------------------------------1

Assembly Instructions -------------------------------------------------------2

Commissioning Instructions -----------------------------------------------3

Servicing Instructions--------------------------------------------------------4

Spare Parts --------------------------------------------------------------------5

Fault Finding Guide----------------------------------------------------------6

Replacing Parts ---------------------------------------------------------------7

User and Operating Instructions ------------------------------------------8

AAMBIMBIRRADAD VVISIONISION®VT RVT RANGEANGE

RRADIANTADIANT TTUBEUBE HHEATERSEATERS

IINSTALLATIONNSTALLATION ANDAND OOPERATINGPERATING MMANUALANUAL

Part No. 700025

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 Safe-

ty 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 & Com-

mercial) 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.

Doc No. 700025 Page 2 of 32

Introduction.

Document Index.

1 Installation Requirements

1.1 Health & Safety

1.2 Model Definitions

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 Radiant Heater

Mechanical Ventilation

Natural Ventilation

1.8.2 Flued Radiant Heater

Mechanical Ventilation

Natural Ventilation

1.9 Flue & Combustion Air Inlet Options

1.10 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

2.2.4 Couplers

2.2.5 U Bends

2.2.6 Reflectors

2.2.7 End Caps

2.2.8 Burner Assembly

2.2.9 Flue Outlet

2.2.10 Detailed Assembly Drawings

3 Commissioning Instructions

3.1 Tools Required

3.2 Commissioning Chart for VT Heaters

4 Servicing Instructions

4.1 Tools Required

4.2 Burner Description

4.3 Burner Removal

4.4 Burner Gas Injector Servicing

4.5 Combustion Fan Servicing

4.6 Burner Head and Electrode Servicing

4.7 Radiant Tube Servicing

4.8 Reflector Servicing

4.9 Inspection of Flue

4.10 Re-commissioning after Service

5 Spare Parts

6 Fault Finding 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 Routine Maintenance Between Service Intervals

8.4 Frequency of Servicing

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 Hi/Low 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. 700025 Page 3 of 32

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

practice. In addition the installation must be

carried out in accordance with the current IEE

wiring regulations (BS 7671), BS 6896:2005

(Industrial & Commercial) and any other

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

protective eye wear is also recommended.

1.2 Model Definitions

VTUT = AmbiRad Vision U Tube heater with

painted forced two stage burner, stainless steel

reflector & end caps.

VTLF = AmbiRad Vision Single Linear heater

with painted forced two stage burner, stainless

steel reflector & end caps.

VTAUT & VTALF = As above except:

aluminised reflector and end caps.

VTCUT & VTCLF = As above except: Stainless

steel IP rated housing, stainless steel brackets,

reflector and end caps

1.3 Heater Suspension

See fig 1b. 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 over-

head steelwork etc. must be purpose made to

good sound engineering practice or of a propri-

etary type fixing. They must be ade-

quately 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.b. 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. The

recommended mounting heights for AmbiRad

heaters are given in the table below.

1.4 Wall Mounting

These radiant tube heaters can be wall

mounted using the appropriate bracket

(AmbiRad part no WMB-13-22-38).

When using the wall mounting brackets the

heater must be inclined at an angle between 30°

and 45°.

Table 1 Angle Mounting

Figure 1.a. Angle Mounting using the Wall

mounting bracket

U Tube Linear

Heater

Size

Required

angle

Chain

length

Eyebolt

position

Chain

length

Eyebolt

position

25 30-35° 10 links 2 7 links 1

45° 13 links 2 9 links 1

Model Recommended Mounting Height (m)

Horizontal Inclined / wall

mounted

25 5.0 - 8.0m 4.0 - 5.0m

1. Installation Requirements.

Isolate any electrical supply to the

heater and controller before proceeding.

Doc No. 700025 Page 4 of 32

Figure 1.b. Recommended Methods of Heater Suspension.

Where 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,

maximum recommended angle

of inclination is 15°.

Ensure burner is also

suspended!!

Shackle method of

attachment. Pin must

be tightened by pliers.

Drop rod with formed hook.

note. hook or eyebolt must

be closed tight.

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. 10mm FOR BOTH

HORIZONTAL AND WALL MOUNTED INSTALLATIONS.

Typical Speedlink attachment.

*These angles to

be equal and not

more than 45°.

Vertical or inclined

suspension on this

plane is acceptable.

U TUBE SUSPENSION

** Alternative suspension

for Linear via single chain.

SINGLE LINEAR SUSPENSION

Must be vertical

Doc No. 700025 Page 5 of 32

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.a Diagram illustrating the clearance to combustibles

VTUT / VTAUT / VTCUT 25

Above Reflector A 180

Above Burner / Heater Outlet B 500

To the Sides C 1000

Below Tubes D 1700

Horizontally from Heater Outlet

(UNFLUED) E 1200

End Wall F 500

Doc No. 700025 Page 6 of 32

VTLF / VTALF / VTCLF 25

Above Reflector A 150

Above Burner B 500

To the Sides C 750

Below Tubes D 1700

Horizontally from Heater Outlet

(UNFLUED) E 1200

End Wall F 500

Above Heater Outlet (FLUED) G 150

Above Heater Outlet (UNFLUED) G1 500

Figure 2.b Diagram illustrating the clearance to combustibles

G/G1

Doc No. 700025 Page 7 of 32

to the heater not to apply excessive turning

force to the internal controls.

A flexible hose is installed to allow safe linear

expansion of the heater without creating undue

stress on the gas supply pipe work. It is

therefore important that a tested and certified

hose assembly made to ISO 10380 2003,

supplied with ½” BSP female cone seat

adapters, is installed as per these instructions.

It is also important to ensure that expansion is

taken up in the body of the flexible hose, and

not on its attachment to the pipe work. The cone

seat adapter supplied on one end of the flexible

gas hose provides a `swivel` action, and must

be fitted on the burner using a ½” BSP barrel

nipple to provide ease of disconnection for

future servicing. This assumes that the heater

and fixed gas supply to the isolating valve have

been installed.

The installation layout described below is

the only method recommended by the

institute of gas engineers, the hose

manufacturer, and AmbiRad and must only be

carried out by a qualified/competent gas

engineer.

fig.a fig.c

Arrow denotes

direction of

expansion.

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:

Vertical (fig.a)

45° angle (fig.b)

90° angle (fig.c)

Any other position in between these angles is

acceptable.

A clearance distance ‘x’ of min 200mm

must be observed to allow side door

access .

Care must be taken to observe the minimum

pipe bend diameter (minimum 250mm,

maximum 350mm) & pipe expansion distance

(minimum 30mm, maximum 70mm) as shown in

fig.e.

Maximum bend diameter for the 1000mm

hose is 450mm.

The correct installation as shown will allow

for approx 100mm of movement due to

expansion.

x x

fig.b

fig.d

1.6 Gas Connection and Supply

Before installation, check that the local

distribution conditions, nature of gas

and pressure, and adjustment of the

appliance are compatible.

A competent or qualified engineer is required to

either install a new gas meter to the service

pipe or to check that the existing meter is

adequate to deal with the rate of gas supply

required. Installation pipes should be fitted in

accordance with BS 6896:2005, so that the

supply pressure, as stated in Table 4 will be

achieved. It is the responsibility of the

competent engineer to ensure that other

relevant Standards and Codes of Practice are

complied with in the country of installation.

Pipes of smaller size than the heater inlet gas

connection must not be used. The complete

installation must be tested for soundness as

described in the country of installation.

The gas union service cock MUST be

fitted in the gas supply close to the

heater, but not onto the burner itself.

Take care when making a gas connection

fig.e

300 +/- 50mm

Burner

50 +/- 20mm

Figure 3. Correct Installation of Flexible Gas Connection

Doc No. 700025 Page 8 of 32

1.7 Electrical Connections

This appliance must be earthed.

Supply 230V 50Hz single phase.

Standard heater 241W.

Current rating 1.05 amp max

(inductive).

Fuse: external 3 amp.

All electrical work should be

carried out to IEE standards by a competent

electrician. The electrical connection to the

heater is made by means of a four pin plug-in

power connector. Live, neutral earth & high fire

connections should be made via a flexible

supply cable to the power connector and routed

clear of the heater or tubes.

The flexible supply cables should be of

0.5mm² and comply with BS

6500:2000. The wires in the mains lead

are coloured in accordance with the

following code: Green & Yellow Earth;

Blue Neutral; Brown Live; Black Live

It is recommended the heater or group

of heaters are controlled by

thermostats, a time switch and if

required manual control switches and a

frost thermostat.

We recommend use of AmbiRad approved

controls. Please refer to control manual for

siting and installation details.

Where alternative manufactures controls are

used, please refer to their instructions for their

siting and installation details.

Table 2 Gas Supply Pressures

Gas Category I2H I3P

Gas Type Natural Gas (G20) Propane (G31)

Max Supply Pressure (mbar) 25 45

Min Supply Pressure (mbar) 17 25

Nominal Pressure (mbar) 20 37

Gas Supply Connection R½ ½in BSP External Thread

fig.f fig.g

The methods shown in fig.f and fig.g are unacceptable, due to undue stress on the hose & fittings.

Figure 4.b Typical VTLF/VTALF/VTCLF Wiring Connections

Figure 4.a Typical VTUT/VTAUT/VTCUT Wiring Connections

Fused Spur

Black

Brown

Blue

Green &

Yellow

Doc No. 700025 Page 9 of 32

Figure 5. Internal Burner Wiring Diagram.

Gas Control

Pressure Switch

Power ON (red)

230V AC

SUPPLY

F1 N

HIGH FIRE

TERMINAL

1424

1222

High Fire

Relay

COIL

230V AC FAN

TERMINALS

EMC FILTER

Low Fire (amber)

TWO-STAGE GAS VALVE 230V

COM

High Fire (amber)

BLBR

Doc No. 700025 Page 10 of 32

1.7 Electrical Connections cont`d

AmbiRad Smartcom MZ controller shown.

VT models:

These models are supplied with a loose four

way connector ready to be connected to the

controller as shown in the diagram below

Figure 5a. VT Models.

Note:

If an AmbiRad controller is NOT used, then any

third party controller must be capable of

disconnecting all outputs to the burner in the event

of a fault.

SmartCom Mulitizone

NEUT

LIVE

HEAT 2 OUTPUT

HEAT 1 OUTPUT

LIVE

NEUTRAL

*IMPORTANT*

Add this link wire

1/L 2/N 10 S/R0S/R1 D0 D1

41407 8 925 145 6

NOTES:

BLACK BULB SENSOR may be

placed at a max distance of 100m

from the control unit, using

screened 0.75mm² cable. Wiring

should be kept separate from

mains wiring to minimise noise

pick up. Set within Engineers

functions for remote sensor.

BLACK BULB

SENSOR

CUSTOMER

WIRING

BURNER MOUNTED

4 WAY CONNECTOR

LOOSE

4 WAY CONNECTOR

(SUPPLIED)

INTERNAL BURNER

CONNECTIONS

KEY:

BL - BLUE

BK - BLACK

BR - BROWN

G - GREEN

EARTH

STUD

3A FUSED SPUR

CUSTOMER

230V AC

SUPPLY

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