Table Of Contents - Mitsubishi Electric Ecodan EHSC series Installation Manual

Contents
1. Safety Notices .................................................................. 2
2. Introduction ...................................................................... 4
Overview of the System ............................................... 4
How the Heat Pump Works .......................................... 4
Overview of the Controls ............................................. 5
3. Technical Information ...................................................... 6
Product specification ................................................... 6
Component Parts .......................................................... 7
Technical Drawings .....................................................11
Unit Compatibility ....................................................... 13
Water circuit diagram ................................................. 13
Local system ............................................................... 14
4. Installation ..................................................................... 15
4.1 Location ...................................................................... 15
Transportation and Handling ..................................... 15
Suitable Location ........................................................ 15
Service access diagrams ........................................... 15
Room Thermostat ....................................................... 15
Repositioning hydrobox............................................. 15
Mounting procedure ................................................... 16
4.2 Water Quality and System Preparation ................... 18
General ........................................................................ 18
Anti-Freeze .................................................................. 18
New Installation (primary water circuit) .................... 18
Existing Installation (primary water circuit) ............. 18
Minimum amount of water required in the space heating circuit 18
How to access Internal Components and Control and Electrical Box .... 18
4.3 Water Pipe Work ........................................................ 19
Hot Water Pipework .................................................... 19
Hydraulic filter work (ONLY EHPT series) ................ 19
Pipework Connections ............................................... 19
Insulation of Pipework................................................ 19
Discharge Pipework ................................................... 19
Filling the System (Primary Circuit) .......................... 19
Sizing Expansion Vessels .......................................... 20
Water Circulation Pump Characteristics .................. 20
Safety device connections ......................................... 21
Piping diagram of 2-zone temperature control ........ 21
Accessories (included)
Back plate

Abbreviations and glossary
No. Abbreviations/Word
 Compensation curve mode
2 COP
3 Cooling mode
4 DHW mode
5 Flow rate
6 Flow temperature
7 Freeze stat. function
8 FTC4
9 Heating mode
10 Hydrobox
 Legionella
2 LP mode
3 Packaged model
4 PRV
5 Refrigerant
6 Return temperature
7 Split model
8 TRV
9 Underfloor cooling
20 Underfloor heating

Screw M5×8
2
Description
Space heating incorporating outdoor ambient temperature compensation
Coefficient of Performance the efficiency of the heat pump
Space cooling through fan-coils or underfloor cooling (Refer to Item no. 20 in this list.)
Domestic hot water heating mode for showers, sinks, etc
Speed at which water circulates around the primary circuit
Temperature at which water is delivered to the primary circuit
Heating control routine to prevent water pipes freezing
Flow temperature controller, the circuit board in charge of controlling the system
Space heating through radiators or Underfloor heating (Refer to Item no. 21 in this list.)
Indoor unit housing the component plumbing parts (NO DHW tank)
Bacteria potentially found in plumbing, showers and water tanks that may cause Legionnaires disease
Legionella prevention mode - a function on systems with water tanks to prevent the growth of legionella bacterium
Plate heat exchanger in the outdoor heat pump unit
Pressure relief valve
A compound used within the heat pump cycle that goes through a phase change from gas to liquid
Temperature at which water is delivered from the primary circuit
Plate heat exchanger in the indoor unit
Thermostatic radiator valve - a valve on the entrance or exit of the radiator panel to control the heat output
A system of water carrying pipes under the floor, that cools the floor surface to cool the room/space.
A system of water carrying pipes under the floor, that warms the floor surface to heat the room/space.
4.4 Refrigerant Pipework (Split Model Systems only) .. 22
Precautions ................................................................. 22
Connecting pipes (Figure 4.4.1) ................................ 22
4.5 Electrical Connection ................................................ 23
5. System Set UP ................................................................ 28
5.1 Dip Switch Functions ................................................. 28
5.2 Connecting inputs/outputs ....................................... 29
Signal inputs ............................................................... 29
Thermistor inputs ....................................................... 29
Outputs ........................................................................ 30
5.3 Wiring for 2-zone temperature control .................... 30
5.4 Installation procedure for DHW tank ........................ 31
5.5 Remote Controller Options ....................................... 33
1-zone temperature control........................................ 33
2-zone temperature control........................................ 34
Remote Installation of Main Controller ..................... 35
5.6 Using SD memory card.............................................. 36
5.7 Main Controller ........................................................... 37
Setting the Main Controller ........................................ 40
Main Settings Menu .................................................... 40
Initial Settings ............................................................ 40
Domestic Hot Water (DHW)/Legionella Prevention . 41
Heating/Cooling .......................................................... 43
Holiday mode .............................................................. 44
Schedule timer ............................................................ 44
Service Menu ............................................................... 46
6. Commissioning .............................................................. 53
Pre-commissioning Checklist ................................... 53
7. Service and Maintenance .............................................. 54
Basic Troubleshooting for Hydrobox........................ 54
Annual Maintenance ................................................... 58
Error Codes ................................................................. 59
Engineers Forms......................................................... 60
Annual Maintenance Log Book ................................. 60
8. Supplementary information .......................................... 63
Refrigerant collecting (pumpdown) for split model systems only .... 63
Back-up operation of boiler ....................................... 63
Multiple outdoor units control ................................... 63
SD memory card