Daikin Altherma 3 H MT ECH2O Installation Manual Download

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7 Configuration

Installation manual

ETSH/X(B)12P30+50EF

Daikin Altherma 3 H MT ECH

₂

4P663479-1 – 2021.07

7.2.4

Configuration wizard: Backup heater

The  capacities  for  the  different  steps  of  the  backup  heater  must  be
set  for  the  energy  metering  and/or  power  consumption  control
feature  to  work  properly.  When  measuring  the  resistance  value  of
each heater, you can set the exact heater capacity and this will lead
to more accurate energy data.

Backup heater type

Code

Description

[9.3.1]

[E‑03]

▪ 0:

None

▪ 2:

▪ 3:

▪ 4:

Voltage

▪ For a

and

model, this is fixed to

230V, 1ph

▪ For a

model, this is fixed to

400V, 3ph

Code

Description

[9.3.2]

[5‑0D]

▪ 0:

230V, 1ph

▪ 2:

400V, 3ph

Configuration

The backup heater can be configured in different ways. For the

model, the system variably choses from 3 available capacity steps
the adequate capacity for the given operating conditions. For the

and

model, it can be chosen to have a 1-step only backup heater

or a backup heater with 2 steps. If 2 steps, the capacity of the
second step depends on this setting. It can also be chosen to have a
higher capacity of the second step in emergency.

Code

Description

[9.3.3]

[4‑0A]

▪ 0: Relay 1

▪ 1: Relay 1 / Relay 1+2

▪ 2: Relay 1 / Relay 2

▪ 3: Relay 1 / Relay 2

Emergency

Relay

1+2

INFORMATION

Settings [9.3.3] and [9.3.5] are linked. Changing one
setting influences the other. If you change one, check if the
other is still as expected.

INFORMATION

During normal operation, the capacity of the second step of
the backup heater at nominal voltage is equal to
[6‑03]+[6‑04].

INFORMATION

If [4‑0A]=3 and emergency mode is active, the power
usage of the backup heater is maximal and equal to
2×[6‑03]+[6‑04].

INFORMATION

If the storage temperature setpoint is higher than 50°C and
no auxiliary boiler is installed, Daikin recommends NOT to
disable the backup heater second step because it will have
a big impact on the required time for the unit to heat up the
storage tank.

INFORMATION

The capacities displayed in the selection menu for [4-0A]
are only correctly displayed for correct selection of the
capacity steps [6-03] and [6-04].

INFORMATION

Energy data calculations of the unit will only be correct for
settings of [6-03] and [6-04] which fit the actually installed
backup heater capacity. Example: For a backup heater
with nominal capacity of 6 kW, the first step (2kW) and the
second step (4kW) correctly sum up to 6 kW.

Capacity step 1

Code

Description

[9.3.4]

[6‑03]

▪ The capacity of the first step of the

backup heater at nominal voltage.

Additional capacity step 2

Code

Description

[9.3.5]

[6‑04]

▪ The capacity difference between the

second  and  first  step  of  the  backup
heater  at  nominal  voltage.  Nominal
value  depends  on  backup  heater
configuration.

Maximum capacity

Code

Description

[9.3.9]

[4‑07]

▪ Maximum capacity that should be

delivered by the backup heater.

▪ Range: 1 kW~3 kW, Step 1 kW

7.2.5

Configuration wizard: Main zone

The most important settings for the main leaving water zone can be
set here.

Emitter type

Heating up or cooling down the main zone can take longer. This
depends on:

▪ The water volume of the system

▪ The heater emitter type of the main zone

The setting

Emitter type

can compensate for a slow or a quick

heating/cooling system during the heat up/cool down cycle. In room
thermostat control,

Emitter

type

influences the maximum

modulation of the desired leaving water temperature, and the
possibility for usage of the automatic cooling/heating changeover
based on the indoor ambient temperature.

It is important to set

Emitter type

correctly and in accordance with

your system layout. The target delta T for the main zone depends on
it.

Code

Description

[2.7]

[2‑0C]

▪ 0:

Underfloor heating

▪ 1:

Fancoil unit