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Control function
10.9.2 Defrost by DHW and electric heater
This function allows to perform defrost operation by DHW tank instead of by space heating water circuit.
The conguration of this option should be done through the master controller.
Conguration →Auxiliary Function →Defrost
Mark Description Default Value Range Steps Units
Defrost_Space Defrost By Space Heating Disabled Disabled /Enabled - -
Defrost_DHW Defrost By DHW Disabled Disabled /Enabled
Defrost_EH1
Defrost By Electrical
Heater
Disabled Disabled /Enabled - -
Usually Unit will perform defrost by space heating whenever [Defrost_Space] is set.
Perform defrost by DHW is permitted when all following conditions are met.
①
[Defrost_DHW] set as [Enabled].
②
TDHW is greater than 35 °C and Tow3 is greater than 25 °C if Hydraulic separator is available.
It is also possible to operate Auxiliary electric heater to accelerate defrost and prevent plate heat exchanger from freezing
during defrost.
Operate Auxiliary electric heater during defrost when all following conditions are met.
①
[Defrost_EH1] set as [Enabled].
②
Tiw is less than 25 °C.
10.9.3 Second Outdoor Ambient Temperature
Optional Second Outdoor Ambient Temperature sensor accessory can be connected to the Auxiliary sensor on PCB1 in
case that the heat pump is located in a non-suitable position for this measurement.
Water Cycle set-point and other applications will be determined by this Second Outdoor Ambient Temperature when sensor
is congured and plugged.
NOTE:
1. When Second Outdoor Ambient Temperature is available Auxiliary sensor on PCB1 of indoor unit need be congured as
function of [Ta_ao] to detect Second Outdoor Ambient Temperature. Refer to 10.10.
10.9.4 Energy conguration
An ESTIMATION of capacity can be checked due to usage of inlet water temperature, outlet Water temperature, feedback
water ow level, output of Auxiliary electric heater and output of DHW Electric Heater.
An ESTIMATION of power consumption can be checked with 2 measuring ways.
①
Use estimated power consumption feedbacked from outdoor unit invert, output of Auxiliary electric heater and output of
DHW Electric Heater.
②
Use power meter device to measure real power consumption. It can be done connecting an external power meter. The
number of pulses of the power meter is a variable that must be set through the master controller. Use Only one power
meter Or 2 separated power meter to measure real power consumption depending on setting.
● Use Only one power meter device for the whole installation (Indoor Unit + Outdoor unit).
● Use 2 separated power meter devices: One for the Outdoor Unit and another one for the Indoor Unit. Power consumption
is combination of power meter1 and power meter2.
ESTIMATION of capacity and power consumption will be presented by space heating, space cooling, DHW, SWP or their
total.
NOTE:
1. Capacity and power consumption is estimated.
2. Capacity and power consumption is based on Auxiliary electric heater with 3-step of 1kW/2kW/3kW if Auxiliary electric
heater is congured.