VOKERA Maxin 24e - Installation & Servicing Instructions Manual

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Installation

& Servicing

Instructions

THESE INSTRUCTIONS

TO BE RETAINED

BY USER

24e & 28e

British Gas Service Listed

G.C. No. 47 094 22 (24e)

G.C. No. 47 094 23 (28e)

Main Page

Introduction2
General Layout2
Design Principles and Operating Sequence3
Central Heating Mode3
Domestic Hot Water Mode3
Safety Devices3
Technical Data4
Dimensions and Contents4
Connection Sizes4
Installation Requirements4
Nominal Hot Water Production5
Central Heating Pump Duty5
Flow Rates5
Gas Rates5
General Requirements6
Related Documents6
Location of Appliance6
Gas Supply6
Terminal Position for Fan Assisted Boiler7
Air Supply7
Water Circulation (Central Heating)7
Pipework7
Air Release Points9
Filling Point9
Electrical Supply9
Showers9
Installation10
Delivery10
Unpacking10
Preparing for Mounting10
Preparation for Mounting the Appliance11
Reduction for Bends11
Horizontal Flue Terminals and Accessories11
Maximum Flue Lengths11
Fitting the Standard12
Horizontal Flue Kit12
Extending the Horizontal Flue12
Concentric Vertical Flue13
Twin Flue System13
Guidance Notes on Twin Flue Installation13
Twin Flue Accessories14
Mounting the Boiler14
Installation of Twin Adaptor Kit14
Installation of Condensate Drain Kit14
Vertical Termination15
Connecting the Gas and Water16
Electrical Connections16
To Gain Access to the Electrical Terminals16
Commissioning18
Central Heating Systems18
Gas Supply Installation18
Initial Filling of the System18
Checking Burner Pressures19
Checking Ignition Heat Input19
Setting the Maximum Rate for Central Heating (Range Rating)20
Checking the Flue System20
Checking the Heating Thermistor20
Final Flushing of the Heating System20
Final Check for Operations21
Re-Check for Gas Soundness21
Concluding Operations21
Servicing Instructions23
Recommended Routine Servicing23
Annual Servicing23
Replacement of Parts23
To Gain General Access/Assembly24
To Remove Front Casing24
Main Burner And/Or Spark and Sensing Electrodes25
Flue Fan26
Fault Finding Guides34
Installation of the Vokera Time Switches (24 Hr and 7Day)42
Room Thermostat42
Frost Thermostat42
No External or Internal Controls42
Wiring to External Time Switches and Thermostats43
General Schematic Diagram43
ACL Time Switch and Typical Room Thermostat43
Randall Time Switch and Vokera Room Thermostat43
Wiring for 'S' Plan Installations44
Wiring for 'Y' Plan Installations44
Exploded Diagrams45
Gas Assembly46
Main Frame & Expansion Vessel46
Connecting Pipes46
Circulation Pump Grundfos AO46
Hydraulic Assembly47
Valves47
Combustion Chamber48
Sealed Case48
Cover48
Front Panel49
Outer Casing49
Hydraulic Sub-Assembly50
Short Spare Parts List51
Functional Flow Diagram52
General Layout & Illustrated Wiring Diagram53
Preliminary Electrical System Checks54
Earth Continuity Check54
Short Circuit Check54
Polarity Check54
L.p.g. Instructions55
Gas Rates (LPG)55
Burner Details (LPG)55

VOKERA Maxin 24e - Installation & Servicing Instructions Manual

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