Energy Monitor Settings; Settings Using The Main Controller; General Description - Mitsubishi Electric EHST20C-VM2C.UK Service Manual

Cylinder unit

Table of Contents

1. General description

End user can monitor accumulated*1 'Consumed electrical energy' and 'Delivered heat energy' in each operation mode*2 on the main controller.

*1 Monthly and Year to date

*2 - DHW operation

- Space heating

Refer to the menu tree in "9-3. Main Settings Menu" for how to check the energy, and "6-7. DIP switch setting" for the details on DIP-SW setting.

Either one of the following two method is used for monitoring.

Note: The method (1) should be used as a guide. If a certain accuracy is required, the method (2) should be used.

(1) Calculation internally

Electricity consumption is calculated internally based on the energy consumption of outdoor unit, electric heater, water pump(s) and other auxiliaries.

Delivered heat is calculated internally by multiplying delta T (Flow and Return temp.) and flow rate measured by the factory fitted sensors.

Set the electric heater capacity and water pump(s) input according to indoor unit model and specs of additional pump(s) supplied locally. (Refer to the menu tree

in "9-3. Main Settings Menu")

Booster heater1

Default

2kW

EHST20C-VM2C

2kW

EHST20C-VM6C

2kW

EHST20C-YM9C

3kW

EHST20C-TM9C

3kW

EHST20C-VM2EC

2kW

EHST20C-VM6EC

2kW

EHST20C-YM9EC

3kW

EHST20C-MEC

0kW

EHST20D-VM2C

2kW

EHST20D-MEC

0kW

EHST20D-MHC

0kW

EHPT20X-VM2C

2kW

EHPT20X-VM6C

2kW

EHPT20X-YM9C

3kW

EHPT20X-TM9C

3kW

EHPT20X-MHCW

0kW

EHST20C-MHCW

0kW

EHST20D-MHCW

0kW

*1 Change setting to 3kW when connecting optional immersion heater "PAC-IH03V2-E".

*2 "***" displayed in the energy monitor setting mode means the factory fitted pump is connected as Pump 1 so that the input is automatically calculated.

When anti-freeze solution (propylene glycol) is used for primary water circuit, set the delivered energy adjustment if necessary.

For further detail of above, refer to the menu tree in "9-3. Main Settings Menu".

(2) Actual measurement by external meter (locally supplied)

FTC has external input terminals for 2 'Electric energy meters' and a 'Heat meter'.

If two 'Electric energy meters' are connected, the 2 recorded values will be combined at the FTC and shown on the main controller.

(e.g. Meter 1 for H/P power line, Meter 2 for heater power line)

Refer to the [Signal inputs] in section "6. WIRING DIAGRAM" for more information on connectable electric energy meter and heat meter.

● Connectable electric energy meter and heat meter

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Voltage free contact for 12VDC detection by FTC (TBI.3 1, 3 and 5 pin have a positive voltage.)

Pulse meter type

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