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SECTION DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE NO
1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0

1.1

Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1

1.2

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1

2

TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . .  2

2.1

Gas Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2

2.2

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2

2.3

General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3

2.4

Overall Dimensions & Minimum Clearances . . . . . . . . . . . . . . . . .  4

2.5

Concentric Air / Flue Duct Specifications . . . . . . . . . . . . . . . . . . .  4

2.6

Specification for Open Flued B33 Applications  . . . . . . . . . . . . . .  5

2.7

Specification for Twin Flued (Type C53) Applications. . . . . . . . . . .  7

2.8

Additional Concentric Flue Kits . . . . . . . . . . . . . . . . . . . . . . . . . .  7

2.9

Appliance Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8

3

INSTALLATION REQUIREMENTS . . . . . . . . . . . . . . . . . . . .  9

3.1

Statutory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

3.2

Appliance Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

3.3

Flue Terminal Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

3.4

Ventilation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

3.5

Condensate Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10

3.6

Gas Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10

3.7

Central Heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10

3.8

Draining Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.9

Safety Valve Open Vented System . . . . . . . . . . . . . . . . . . . . . . .  11

3.10

Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.11

Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.12

Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.13

Open Vented Water System . . . . . . . . . . . . . . . . . . . . . . . . . . .  11 

3.14

Domestic Hot Water System . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.15

Sealed Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.16

Safety Valve Sealed System . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

3.17

Expansion Vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

3.18

Pressure Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

3.19

Water Makeup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

3.20

Filling a Sealed Water System. . . . . . . . . . . . . . . . . . . . . . . . . .  13

3.21

Electricity Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13

3.22

External Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13

4

APPLIANCE INSTALLATION . . . . . . . . . . . . . . . . . . . . . .  14

4.1

Unpacking The Appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14

4.2

Preparing The Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14

4.3

Mounting The Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14

4.4

Central Heating Service Connections . . . . . . . . . . . . . . . . . . . . .  15

4.5

Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15

4.6

Condensate Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15

4.7

Air / Flue Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15

4.8

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17

5

COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19

5.1

Filling the Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19

5.2

Commissioning the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . .  19

5.3

Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

5.4

Lockout / Reset Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

5.5

Frost Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

5.6

Overheat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

5.7

Other Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

5.8

Users Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21

5.9

Appliance Log Book. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21

5.10

Gas Conversion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21

6

ROUTINE SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . .  22

6.1

Combustion Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

6.2

Gas Control Valve, Fan & Burner Assembly . . . . . . . . . . . . . . . .  22

6.3

Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

6.4

Ignition & Detection Electrodes . . . . . . . . . . . . . . . . . . . . . . . . .  22

6.5

Combustion Chamber & Heat Exchanger . . . . . . . . . . . . . . . . . .  23

6.6

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23

6.7

Sealed Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24

6.8

Re-assembly & Re-commissioning . . . . . . . . . . . . . . . . . . . . . . . .  24

6.9

Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24

7

INTERNAL WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . .  25

7.1

Functional Flow Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . .  25

8

FAULT FINDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

8.1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

8.2

Diagnostic LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

8.3

Faulting Finding Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

8.4

Central Heating Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . .  26

9

REPLACEMENT OF PARTS . . . . . . . . . . . . . . . . . . . . . . .  28

9.1

Ignition and Detection Electrodes. . . . . . . . . . . . . . . . . . . . . . . .  28

9.2

Igniter Unit and Ignition Leads. . . . . . . . . . . . . . . . . . . . . . . . . .  28

9.3

Gas Control Valve including Air Inlet Cowl . . . . . . . . . . . . . . . . .  29

9.4

Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29

9.5

Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30

9.6

Combustion Chamber Front Insulation . . . . . . . . . . . . . . . . . . . .  31

9.7

Combustion Chamber Rear Insulation. . . . . . . . . . . . . . . . . . . . .  31

9.8

Heat Exchanger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

9.9

Flue Hood. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

9.10

Water Temperature Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

9.11

Flue Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

9.12

Condensate Drain System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

9.13

Control PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

10

SHORT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

The Halstead 

Eden VBX

range are high efficiency condensing,

fully automatic, wall mounted gas appliances suitable for either
room sealed or opened flued applications, for use with natural
gas (G20), and LPG (G31). They are designed for use with either
sealed or open vented central heating systems.
The appliances feature an attractive white stove enamelled
casing, with inset control panels. The flue system are in white
stove enamel to give a clean attractive appearance to the
installation. 
A standard horizontal concentric air/flue duct terminal is
available, (maximum duct length of 755 mm (29 in)), suitable for
room sealed applications. The duct assembly is connected to the
appliance via a turret, which can be orientated to provide
different horizontal duct directions. Extension ducts may be fitted
in accordance with and up to the maximum dimensions stated in
these instructions.
A vertical concentric outlet kit is also available for installations
where an outside wall is not accessible or where it is desired to fit
the duct 'through the roof'. Installation using the horizontal duct is
described in the main text of these instructions and additional
information is provided in the vertical outlet kit for the vertical
installation option. (Note: If the vertical outlet kit is to be used,
access to the roof is necessary).
Other flue kits are available for open flued (B

23

), split flued (C

53

),

and special (C

13

) applications, contact Halstead Boiler Ltd Service

Help Line: 01926 834834, for further details,

ONLY HALSTEAD APPROVED FLUE KITS OR
EXTENSIONS MAY BE USED WITH THESE APPLIANCES.

CONTENTS

INTRODUCTION

1

Summary of Contents for VBX 18

Page 1: ...T R A I N I N G 0 1 9 2 6 8 3 4 8 3 8 Halstead Boilers Limited 20 22 First Avenue Bluebridge Industrial Estate Halstead Essex C09 2EX Telephone 01787 272800 Sales Direct Line 01787 475557 Fax 01787 47...

Page 2: ...nctional Flow Wiring Diagram 25 8 FAULT FINDING 26 8 1 General 26 8 2 Diagnostic LED Indicators 26 8 3 Faulting Finding Codes 26 8 4 Central Heating Fault Finding 26 9 REPLACEMENT OF PARTS 28 9 1 Igni...

Page 3: ...appliance are cured and give no known hazard in this state Insulation Pads These can cause irritation to skin eyes and the respiratory tract If you have a history of skin complaints you may be suscept...

Page 4: ...8 9 kg h 2 36 1 43 Seasonal Efficiency 90 4 91 0 92 4 93 1 Seasonal Efficiency SEDBUK Band A Nox Classification Class 5 Min Central Heating System Pressure Bar 0 1 1 m H2O Max Central Heating System P...

Page 5: ...ue max rate Propane 0 019 0 005 Flue products mass flow rate Nat Gas g s 13 7 8 3 Flue products mass flow rate Propane g s 13 7 8 3 Gas Valve Offset min rate Pa 3 0 Connections Gas 15 mm compression C...

Page 6: ...user interface from its housing see figure 22 c Lower the controls front d Unplug the electrical leads from the PCB Refer to section 7 e Unplug the BCC boiler chip card if fitted f Remove the PCB pla...

Page 7: ...m Roof terminal with rain cover and pitched roof flashing kit a b 3c If the standard horizontal terminal is likely to cause nuisance to neighbours or buildings because of excess pluming then this part...

Page 8: ...ded that to prevent dust the insulation be dampened prior to removal and that a protective mask is worn when changing or handling the insulation material Refer to Figure 43 a Ensure supply voltage is...

Page 9: ...me equivalent length 45 Extension Elbow Allows an additional bend in the flue and has an equivalent length of 775 mm Vertical Turret Socket For use with elevated horizontal flues and vertical terminal...

Page 10: ...e that all joints and seals are correctly re fitted Note The gas control valve is factory set and sealed and is not adjustable If the gas control valve is changed then when the appliance is running th...

Page 11: ...imitations MUST be observed when siting the appliance a The appliance is not suitable for external installations The position selected for installation should be within the building unless otherwise p...

Page 12: ...The complete installation must be tested for gas tightness 3 7 CENTRAL HEATING SYSTEM a The appliances are designed for open vented central heating water systems but may be fitted to a sealed central...

Page 13: ...INDER SINGLE FEED INDIRECT CYLINDERS ARE NOT SUITABLE The domestic hot water cylinder must be of the double feed fully indirect coil type 3 15 SEALED WATER SYSTEMS The installation must comply with th...

Page 14: ...cuit to ensure pump over run functionality 3 18 PRESSURE GAUGE A pressure gauge with a set pointer and covering at least 0 to 4 bar 0 to 60 lb in shall be fitted permanently to the system in a positio...

Page 15: ...plete electrical isolation of the appliance Either a 3A fused three pin plug and un switched shuttered socket outlet both complying with BS 1363 or a 3A fused double pole switch having a 3 mm contact...

Page 16: ...per template in the required position ensuring that the necessary clearances are achieved Ensure squareness by hanging a plumb line b Mark the position of the wall mounting plate fixing holes 4 c Mark...

Page 17: ...products are available from Grundfos Pumps Ltd on 01525 850000 and Pump House on 0115 922 2211 22 ROUTINE SERVICING 6 6 1 COMBUSTION CHECK The appliance incorporates a flue sampling point on the appli...

Page 18: ...flue elbow e Fit the flue terminal to the flue system ensuring that the duct joints are not disturbed and that the external sealing ring is seated against the outside wall f Finally use the internal...

Page 19: ...cluded in the appliance specification ANTI CYCLE DEVICE When the appliance cycles on its central heating control thermostat a slow cycle device operates The timer set to 5 minutes is activated after t...

Page 20: ...s tightness in accordance with BS 6891 1988 Open all doors and windows extinguish naked lights and DO NOT SMOKE whilst purging the gas line It is recommended where possible to flush the CH system with...

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