MTD 400 Manuel de service télécharger pdf (Page 27)

Boiler replacing the heat pump

This configuration manages a boiler rather than the heat pump, for water temperatures above the limits of the unit.

The boiler is enabled when the outside air temperature is less than the value of parameter HP05.

Outlet water temperature (°C)

Outside air temperature (°C)

-15-20 -5 7 45

Boiler Heat pump

Parameter Value Description

CL61 30 Configuration of output KM4 as replacement boiler

HI20 0 Deactivation of heat pump heaters

HP03 -5 Differential from the maximum water temperature available with the heat pump

HP05 -12 Differential from rated outside air temperature (+7°C)

HP11 -5,1 Outside air temperature to shut down heat pump and activate the boiler

HP12 1 Outside air temperature hysteresis to enable the heat pump

Model Power supply 1st stage 2nd stage Total

Awr 0011 MTD Single-phase 230V 1 kW 2 kW 3 kW

Awr 0025 MTD Single-phase 230V 2 kW 2 kW 4 kW

Awr 0031 MTD Single-phase 230V 2 kW 3 kW 5 kW

Awr 0041 MTD Single-phase 230V 3 kW 4 kW 7 kW

Awr 0031 MTD Three-phase 400V 3kW 6kW 9kW

Awr 0041 MTD Three-phase 400V 3kW 6kW 9kW

Awr 0051 MTD Three-phase 400V 3kW 6kW 9kW

Awr 0061 MTD Three-phase 400V 3kW 6kW 9kW

HEAT PUMP HEATERS (AWR MTD MODELS ONLY)

The AWR MTD unit is fitted with electric heaters with the following power ratings:

The heaters can be activated as a replacement or additional source of heat, as described below.

Parameter AS00 defines the DHW storage heating mode (AS00=1 factory setting)

27GB 01/2009 AWR MTD - AWR MTD/B

ADDITIONAL HEATER (OUTSIDE THE UNIT) (KM4)

The additional heater may be configured as:

- DHW storage heater.

- Boiler replacing the heat pump.

Additional DHW storage heater

The additional heater may be a electric heater or a boiler, to be connected as shown in the chapter on “installer connections”.

The device is activated if the storage temperature (sensor BT4) is less than the value calculated by:

Water storage temperature (BT4) < AS01-AS07-AS06

The device is deactivated if the storage temperature (sensor BT4) is above the value calculated by:

Water storage temperature (BT4) > AS01-AS07

Parameter Value Description

0 Domestic hot water management disabled

1 Domestic hot water production with heat pump only

AS00 2 Domestic hot water production with additional DHW storage heater only (e.g. electric heater)

3 Domestic hot water production with heat pump and additional DHW storage heater

(e.g. electric heater)

AS01 50 Domestic hot water set point

AS06 3 Additional heater domestic water hysteresis

AS07 0 Additional heater domestic water differential

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 51 52

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MTD 400 Manuel de service Page 27

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