Bosch HP270-2 Bedienungsanleitung

DOMESTIC HOT WATER

HEAT PUMP 200 / 250 / 270 L

This document is confidential and restricted to exclusive use by the official technical

assistance of Bosch in the countries of destination of this product.

TECHNICAL MANUAL FOR AFTER SALES AND

SERVICE TECHNICIANS

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1) Introduction

Domestic Hot Water Heat Pumps (DHW-HP), with or without air connections ducts, use the heat existing in the

surrounding air, or the wasted heat from the indoor air, as energy source for DHW preparation.

This model of domestic hot water heat pump provides hot water for residential purposes, using a closed refrigerant

unit filled with R134a. This ensures the energy production taking out the energy from the air –the cold source –

and delivers the energy to a secondary circuit –the water –where a simple circulation pump, ensures the water

movement through a plate heat exchanger, heating the water that is stored in a tank.

2) Working Principle

There are 2 variants of heat pumps, depending on the working conditions:

-Positive working temperatures: +5ºC / +35ºC

-Negative working temperatures: -10ºC / +35ºC

Note: In case the air temperature is out of the specified working range, the appliance automatically activates the

electrical back up (if in Combi mode). One hour after the warning display (HOT or COLD) has appeared; the

appliance checks the air temperature and, in case it is within the range values, returns to heat pump mode

operation.

The control loop for air temperature check is done every hour, while the electrical backup is in operation.

Stand-by mode

HMI actuation

LCD Backlight ON

Active Operation Mode

(default from factory: combi mode + manual operation)

LCD Backlight OFF

(after 15 sec without any selection)

Current Temperature of the Tank

(measured at the top)

Clock & Day Function

(defined at start up and/or current day and hour)

Temperature Selection

(default from factory = 50ºC)

(except FD>555: software

7003/5003 = 54ºC)

Temperature Blinks

until confirmation with

OK button

Temperature remains as

previous after 10 sec in

case of any other selection

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2.1) Operation Modes

Operation Modes (HP 270-2)

Comment

Combi Mode

(default selection from factory)

T set = 50ºC / 54ºC (default value depends

software version)

Temperature adjustment: 30ºC to 70ºC

Heat Pump Mode

Temperature adjustment: 30ºC to 60ºC

Electric Heater Mode

Temperature adjustment: 30ºC to 70ºC

New Platform (HP270-3 and HP200/250-1)

Combi Mode

(default selection from factory)

Standby

Operation

T set = 53ºC

Temperature adjustment: 30ºC to 70ºC

Economic Mode

Temperature adjustment: 30ºC to 60ºC

Electric Heater Mode

Temperature adjustment: 30ºC to 70ºC

Table 1 –Operation Modes

Conditions for operation:

The heat pump compressor is activated according to the following conditions and control unit settings,

nevertheless, following sequence is always verified when connecting to the main power, when an error code is

reseated or the appliance stops due to reaching the selected temperature.

In the current service manual version, the software specific functions are indicated according Software Version at

control unit identification sticker.

0 –1 min: Water Pump

1 –3 min: Standby (Duct off)

1 –2 min: Standby (Duct on)

3 –4 min: Fan activation when

Duct OFF

2 –4 min: Fan activation when

Duct ON

> 4 min: Compressor and water

pump activation

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From FD ≥ 306 (June 2013) until FD ≤ 453 (May 2014):

HPAF0501 (-10ºC / + 35ºC models)

HPAF0701 (+5ºC / +35ºC models)

Operation Mode described during manual.

From FD ≥ 454 (June 2014):

HPAF0502 (-10ºC / + 35ºC models)

HPAF0702 (+5ºC / +35ºC models)

Changes done in new version:

- “Syst” message indication in case of detection of PV energy production;

- Introduction of new parameter “Rcir” (see IM) for software information about existence of external recirculation of

domestic hot water;

- E09 / E11 lockout activates automatically electrical heater to ensure minimum 40ºC hot water in tank (in combi or

in heat pump mode).

From FD ≥ 555 (July 2015):

HPAF0503 (-10ºC / + 35ºC models)

HPAF0703 (+5ºC / +35ºC models)

oSet Point –default set point of 50ºC was changed to 54ºC due to ErP directive;

oOperation in Automatic Mode –in previous version was not possible to deactivate the external booster

heater (boiler = boil ON) according the defined automatic program mode (P1, P2, P3) in combination with

boiler. The boiler did not switch off after reaching the set point and the correction was using only manual mode.

oFull Mode –the manual (FULL) activation will have from now on, priority even in inactivity periods defined in

P1 / P2 / P3.

Current New

Pict.1 –Behaviour of FULL = Compressor + E-heater / Compressor + Boiler

OFF

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oComfort Improvement –to improve comfort a waiting time was introduced, so while heating, the appliance will

be able to detect if the user is tapping water. In situations where the storage tank has an uniform temperature

near the set point and a tapping is detected, the heat pump will stop for 1 hour to maximize the use of hot water

in top part.

oChanges in Air Defrost sequence

(Attention: only +5ºC / +35ºC model)

Current Behavior:

Air defrost sequence is activated during 10 min with fan On and compressor Off when 5ºC < Tair (3d) < 10ºC for

more than 60 min and compressor is ON for more than 60 min. The number of air defrost (8d) will depend on other

conditions listed in this manual.

This new software version brings additionally an air defrost sequence activated during 45 min when 0ºC < Tair <

5ºC, as due to ErP directive and to decrease electrical consumption for cold climate the appliance wilkl be allowed

to operate when possible below minimum limit.

2.2) HMI Configuration (see Installation Manual for details)

HP 270-2: From FD ≥ 306 (June 2013) until FD ≤ 660 (Dec 2016):

HPAF0501 / 0502 / 0503 (-10ºC / + 35ºC models)

HPAF0701 / 0702 / 0703 (+5ºC / +35ºC models)

HP Heating Water

T bot < 25ºC

Check Tapping Process

(T top - Tbot < 8ºC

T set –Ttop < 5ºC for 5 min)

False

True

HP stops for 1 h

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Pict.2 –Parameters overview in main and sub menu of HP270-2

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Pict.3 –Heat Pump Diagram (Model HP270-2: -10ºC / +35ºC)

Operation Modes

Applicable to HP-2 with software version:

HPAF0501 / 0502 / 0503 (-10ºC / + 35ºC models)

HPAF0701 / 0702 / 0703 (+5ºC / +35ºC models)

Operation Mode

Evaporator

Compressor

Solenoid

Pump

E-Heater

Combi Mode

Conditions (Man / Aut)

ON if compressor is

Note: If Duct On

starts 2 min before

compressor and if

Duct Off starts 1

min before

compressor in order

to update air

temperature value

ON if -10ºC < Tair <

+35ºC

and T bot < 55ºC

and T top < 60ºC

OFF

ON if compressor

is ON or

1 min ON

everyday if

compressor is

OFF

ON if compressor

cannot work due air

temperature

conditions

(Tair < -10ºC or Tair >

35ºC)

or Tbot > 55ºC or T

top > 60ºC

Heat Pump Mode

Conditions (Man / Aut)

ON if -10ºC < Tair <

+35ºC

and T bot < 60ºC

OFF

Electric Heater Mode

Conditions (Man / Aut)

OFF

1 min ON every

hour

Full Mode Conditions

ON if compressor is

ON:

Note: If Duct On

starts 2 min before

compressor and if

Duct Off starts 1

min before

compressor in order

to update air

temperature value

ON if -10ºC < Tair <

+35ºC

and T bot < 55ºC

and T top < 60ºC

OFF

ON if compressor

is ON or

1 min ON every

hour if E-heater

ON when

compressor is

OFF

Table 2 –Operation Modes Conditions

Ttop

Tbottom

Tair

Tfins

Start Up Condition:

Ttop < (Tset –3ºC)

Stop Condition:

Ttop ≥ Tset

module

tank

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From FD ≥ 660 (Dec 2016):

HPAF2501 (-10ºC / + 35ºC models) (HP270-3)

HPAF2701 (+5ºC / +35ºC models) (HP270-3)

Introduction of HP 270-3 Model

Product Changes:

-New HMI concept;

-Remove of “Rcir” parameter;

-Replacement of Tank Bushes;

-Replacement of charging / measurement point cover;

-Magnesium Anode in tank bottom but possible control by measuring current;

-Electric heater integration in module;

-Change of pump: Electronically controlled with variable speed;

-Change of Fan: Electronically controlled;

Pict. 4 –Detail of impact in hydraulic circuit with electric heater in top of module and new pump

From FD ≥ 660 (Dec 2016):

HPAF2801 (+5ºC / +35ºC models) (HP200/250-1)

Introduction of HP 200/250-1 Platform

Product Changes:

-New Tank Platform (200 / 250 litres)

-New Module design with side connections for air

-Electric heater integrated in module

-Anode in top of tank

Pict. 5 –Detail of new module platform in HP200/250-1

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Pict.5 –Parameters overview in main and sub menu of HP270-3 / HP200/250-1

Applicable to HP-3 with software version:

HPAF2501 (-10ºC / + 35ºC models) (HP270-3)

HPAF2701 (+5ºC / +35ºC models) (HP270-3)

HPAF2801 (+5ºC / +35ºC models) (HP200/250-1)

Operation Mode

Evaporator

Compressor

Solenoid

Pump

E-Heater

Combi Mode

Conditions (Man /

Aut)

ON if compressor is

Note: If Duct On

starts 2 min before

compressor and if

Duct Off starts 1 min

before compressor in

order to update air

temperature value

ON if -10ºC <

Tair < +35ºC

and T dis < 61ºC

and T top < 58ºC

(same for +5ºC

model)

OFF

ON if

compressor is

if E-heater ON

when

compressor is

OFF

ON if compressor

cannot work due air

temperature

conditions

(Tair < -10ºC or Tair

> 35ºC)

or T dis > 63ºC or T

top > 60ºC

Economic Mode

Conditions (Man /

Aut)

ON if -10ºC <

Tair < +35ºC

and T top < 60ºC

OFF

ON if T air < -10ºC

T air > 35ºC

(same for +5ºC

model)

Electric Heater

Mode Conditions

(Man / Aut)

OFF

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Boost Mode

Conditions

ON if compressor is

ON:

Note: If Duct On

starts 2 min before

compressor and if

Duct Off starts 1 min

before compressor in

order to update air

temperature value

ON if -10ºC <

Tair < +35ºC

and T dis < 61ºC

and T top < 58ºC

OFF

ON if

compressor is

ON if E-heater

ON when

compressor is

OFF

Table 3 –Operation Modes Conditions

2.2) Protection Modes

Anti-Freeze Protection

The anti freeze protection is designed to protect both the module and the tank and is active in all conditions,

specially, when the appliance is set in Heat Pump, standby, OFF and Holyday (Hol) modes.

Note: In order to ensure the anti freeze protection activation, the mains plug must not be disconnected.

Pict.6 –Heat Pump Diagram (Model HP270-2: -10ºC / +35ºC)

Module Protection

Start Up Condition:

TBottom < 4ºC

Module Protection

Stop Condition:

Until T bottom > 6ºC + Water Pump

ON during 1 min

Tank Protection

Start Up Condition:

Ttop < 5ºC

Tank Protection

Stop Condition:

E-Heater ON until Ttop > 8ºC

(not in case of Full or Legionela activation)

Pump + Electric Heater ON

Pump + Electric

Heater ON

Only HP270-3 and HP200/250-1:

Integrated E-Heater in module

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