Introduction; Table Of Contents - Ecodan 150 Standard Installation And Servicing Instructions

CONTENTS

INTRODUCTION ....................................................................................................................................2

GENERAL REQUIREMENTS ................................................................................................................4
INSTALLATION – GENERAL ................................................................................................................16
INSTALLATION - DISCHARGE .............................................................................................................19
INSTALLATION - HEAT PUMP PRIMARY CIRCUIT .............................................................................22
INSTALLATION - SOLAR PRIMARY......................................................................................................31
INSTALLATION - IMMERSION HEATER ELECTRICAL SUPPLY.........................................................32
COMMISSIONING .................................................................................................................................33
MAINTENANCE ....................................................................................................................................34
FAULT FINDING & SERVICING ............................................................................................................36
SPARE PARTS ......................................................................................................................................36
USER INSTRUCTIONS .........................................................................................................................39
ENVIRONMENTAL INFORMATION ......................................................................................................40
TECHNICAL SUPPORT ........................................................................................................................40
INTRODUCTION
This range of factory pre-plumbed and wired unvented water heaters specifically designed for use with the Mitsubishi Ecodan
Air Source Heat Pump range. The cylinder is manufactured in the UK from top quality materials and meets all the latest relevant
safety and constructional standards. The high grade Duplex stainless steel cylinder offers exceptional strength and corrosion
resistance. Its performance, control system and insulation levels exceed the latest requirements of Building Regulation Part L.
The unvented water heater can be fed directly from the cold water mains supply to the property without the need for separate
feed cisterns or vent pipes. It is supplied fitted with all its necessary inlet and safety controls for compliance with Building
Regulations. Also fitted are primary circulating pumps, a DHW circulation pump, primary to DHW plate to plate heat exchanger,
3 way diverter valve, automatic air vent, primary filling loop and pressure gauge, a cylinder thermal cut-out and Mitsubishi
Electric FTC5 controller. The pumps, motorised valve and thermal controls are supplied pre-wired. A heating and domestic hot
water programmer, The DHW expansion vessel is supplied loose for installation at a convenient position within the property.
An electric immersion heater is also fitted to enable the unit to be heated should the heat pump require supplmentary heating
or be turned off.
NOTE: If using a sealed heating system, adequate provision for expansion within the primary circuit MUST be provided by
fitting a primary circuit expansion vessel. Primary circuit expansion cannot be accommodated within the Air Source Heat
Pump cylinder. Ensure a primary circuit expansion relief valve is fitted to the primary circuit.
The safety valves fitted to the Air Source Heat Pump cylinder protect the water heater only. Failure to provide adequate
primary system pressure relief when using a sealed heating system will invalidate the Heat Pump warranty. Consult the Heat
Pump installation instructions for further advice.
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