Hisense AHM-080HCDSAA - Boiler Combination; PI Control Method

252
Control function
10.6 Boiler combination
Boiler can be used as additional heating capacity or replacement heating capacity during cold outdoor temperatures. Boiler
can also be used for emergency operation in case of outdoor unit malfunction. Boiler can o󰀨er additional heating capacity
during space heating / DHW / swimming pool depending on setting.
Boiler and Heater can never work at the same time. The decision as to how to operate is based on ambient temperature
and heat source selection as below.
Boiler will only operate when Boiler is selected as heat source ([Heating Source] is set to [HP + Boiler] or [HP + Heater +
Boiler] ).
The conguration of this option should be done through the master controller.
Conguration →Complementary Heating →Heating Source
Mark Description Default Value Range Steps Units
Defrost_EH1 Defrost by Electrical heater Disabled Disabled /Enabled - -
NOTE:
1. Hydraulic separator and water sensor [Tow3] must be available to use boiler (referring to 10.2.5).
2. Optional Output signal can be congured as function of [boiler combination] and be used to activate boiler with the dry
contact (referring to10.10.2) .
3. Hot water temperature detection sensor [Tow3] of the hydraulic separator must avoid to be installed too closely to the
outlet pipe of boiler.
4. Keep distance between outlet pipe of boiler and outlet pipe of the hydraulic separator.
10.6.1 PI control method
The desired heating supplied by Boiler is determined by the Load factor, which is calculated by a P+I function ranging from
0 to 100%. Actual Boiler output will be translated from percentage to ON/OFF output.
(1) Boiler Target temperature
Boiler operation is controlled by the Boiler target temperature.
(2) Boiler load factor
Load Factor determines the desired heating supplied by Boiler. Load factor is calculated by a P+I function ranging from 0 to
100%.
P（HEPB）
Z
Boiler Target
temperature
+
Hot water
temperature of the
hydraulic separator
Tow3
⊿T
Boiler
Outlet
water
I（HEIRF）
Tow3
-
Where:
HEPB: Proportional band of Boiler.
HEIRF: Integral reset factor of Boiler.
The conguration of this option should be done through the master controller.
Conguration →Complementary Heating →Electrical Heater
Mark Description Default Value Range Steps Units
HEPB Proportion Factor 2.0 0-20 0.2 %/°C
HEIRF Integral Factor 1.0 0-20 0.1 %/°C.min
NOTE:
1. [HEPB] and [HEIRF] use the same parameters as Electrical Heater (referring to 10.5.1) .