Second Water Temperature Control - Hisense Hi-Therma Series Service Handbook

Control function
(2) Cycle 2
The configuration of this option should be done through the master controller.
Configuration → Space heating → Cycle 1→Room temperature Compensation
Mark
Rfacth_c2 Compensation factor
Maxfacth _c2 Max Compensation value
Minfacth _c2 Min Compensation value
Compenh_c2= Rfacth_c2 × Maximum difference of room setting temperature and room temperature for
Thermo On Rooms on Cycle 2
Minfacth _c2 ≤ Compenh_c2 ≤ Maxfacth _c2
NOTE:
1. [Compensation factor] on Configuration set as [OFF] to inactive room thermostat compensation.
2. Use room thermostat compensation to increase target outlet water temperature dynamically according to room heating
load with relative low set-point.

10.2.2.2 Second water temperature control

The mixing valve is controlled to maintain the second heating supply temperature at the second heating target outlet water
temperature. The mixing valve position is calculated with a proportional integral action (P+I) control algorithm based on the
difference between the heating target outlet water temperature and the heating supply temperature.
cycle_2_room_1
Wired1
ACT3
Tow2
WP2
Vmix
Cycle 2 mixing valve position
Cycle 2 Target outlet
water temperature
+
Tow2
Where:
PB: Proportional band of mixing valve.
IRF: Integral reet factor of mixing valve.
RTV: running time factor of mixing valve.
Description
cycle_2_room_2
Wired2
ACT4
P（PB）
⊿T
I（IRF）
-
Default Value Range
2 OFF-1-5
10 0~10
-10 -10~0
Z
226
Steps
1
1
1
Cycle 2 outlet water
temperature
Mixing Outlet
valve water
Units
°C
°C
°C
Tow2