Dhw Preparation; Basic Heating Using The Heat Pump; Attainable Hot Water Temperatures; Hot Water Temperatures Dependent On The Heat Source - Dimplex WPM 2006 R Installation And Start-Up Instructions Manual

8

8 DHW Preparation

Hot water cylinders with a sufficient heat exchanger area should
be used for DHW preparation. These must be capable of
permanently transferring the maximum heat output of the heat
pump.
Regulation is carried out using a sensor installed in the hot water
cylinder. The sensor is connected to the heat pump manager.
The temperatures attainable in heat-pump-only operation are
below the maximum flow temperature of the heat pump.

8.1 Basic Heating Using the Heat Pump

A request for domestic hot water is recognised if the current
hot water temperature < (is lower than)
Set temperature – hysteresis DHW.
A request for domestic hot water is ended if
hot water temperature > set temperature
Menu
Preconfiguration
Preconfiguration
Tab. 8.1: Settings for basic heating of domestic hot water (user settings carried out in compliance with the operator's manual)
8.1.1

Attainable Hot Water Temperatures

The maximum hot water temperature which can be attained with
heat-pump-only operation is dependent on:
The heat output of the heat pump
8.1.2

Hot Water Temperatures Dependent on the Heat Source

The heat pump manager automatically calculates the maximum
possible hot water temperature. It is designated as HPMaximum.
HP Maximum is - along with the influencing factors described in
Chap. 8.1.1 on p. 26 - also dependent on the current temperature
of the air, brine or water heat source. To ensure that the
maximum possible hot water temperature is always attained, the
permissible range of the heat source temperature is divided into
temperature ranges. Each range has a specific HPMaximum

8.2 Reheating with Flange Heater/2nd Heat Generator

Reheating means that the heat pump undertakes DHW
preparation until the HP Maximum Temperature is reached.
Subsequently, an additional heat generator takes over DHW
preparation until the desired set temperature is reached.
Reheating is only activated if the desired set temperature is
higher than the current HPMaximum Temperature.
Reheating is started if
Hot water temperature > (is higher than)
current HP Maximum Temperature.
Menu
Preconfiguration
Preconfiguration
Tab. 8.2: Enables for selective reheating using a flange heater (user settings carried out in compliance with the operator's manual)
E-26
For higher hot water temperatures, the heat pump manager
offers optional control of a flange heater.
Regulation can also be carried out using a thermostat. With this
application, selective reheating using a flange heater is not
possible.
NOTE
The additional setting options for heat pumps with an additional heat
exchanger installed in the hot gas are described in Chap. 12 on p. 34.
NOTE
DHW heating can be interrupted by defrosting or by the high-pressure
safety program.
Submenu
DHW preparation
Flange heater
The heat exchanger surface area in the cylinder and
The volume flow in relation to the pressure drop and the
capacity of the circulating pump.
Temperature and each HP Maximum is pre-assigned with a
default value of 65°C.
If the high-pressure pressure switch activates during DHW
preparation with the heat pump, the current heat source
temperature is measured and the associated HP Maximum
Temperature is calculated as follows:
1 K is deducted from the currently measured hot water
temperature and is stored as HP Maximum.
Reheating is ended if
Hot water temperature > (is higher than)
set temperature
If the hot water temperature falls below the Set temperature –
hysteresis DHW during reheating, the reheating process is
stopped and basic heating is started using the heat pump.
Selection of the respective heat generator for DHW generation is
dependent on the operating mode of the heat pump system, the
configuration, and the current statuses of the system.
Submenu
DHW preparation
Flange heater
Setting
Yes
No
Setting
Yes
Yes