Instruction For The Fitter; Devices Of Control And Safety; Defrost Operation; Instruction Of The Solar Coil - OEM KS25-C120 Installation And Operating Instructions Manual

5- Instruction for the fitter:

The fitter has to read the following notice and explain the instructions to the user.
5-1

Devices of control and safety:

The heat pump is equipped with:
2 control devices:
A defrost temperature probe located on the evaporator, starts the defrost sequence.
A thermal probe located on the exchanger, ensures the cut of the heat pump when the temperature of the water reaches
the temperature instructed
The meaning of code name:
T1: water temperature
T2: ambient temperature
T3: exhaust temperature from compressor
T4: coil temperature in outdoor heat exchanger
TC: water temperature setting
Control function:
1. TC can be set between 10℃-60℃ in heating mode. Original TC is 45℃. When T1≤TC-1℃, Compressor and fan motor
start; When T1≥TC+1℃, Compressor and fan motor stop.
When compressor is running, if T2≤14℃, the four way valve2 on; if T2≥16℃, the four way valve2 off.
5-2

Defrost operation:

1. Defrost:
The system begins to defrost if the following three terms are met in the same time:
a. T4≤-7℃ lasts for a while;
b. compressor runs continuously for more than 5 minutes
c. Compressor runs accumulative total for 45 minutes(the interval between two defrost is a cycle, time accumulates)
While the system begin to defrost, compressor and fan motor stop at first and four way valve1 is on after 1
minutes and
begins to work, compressor restarts after it stop for 3 minutes. If the sensor for T4 is damaged, the system begins defrosting
after compressor runs continuously for 45 minutes.
2. Terms of defrost exiting:
When defrosting time reach 3 minutes and T4 reaches 10℃ or defrosting time reaches 8 minutes, defrost exits and enter
heating water mode. While defrost exiting, after compressor and fan motor stop for 1 minute, four way valve1 is off.
Compress restart after it stops for 3 minutes, the system will run the mode the same as before defrost.
5-3

Instruction of the solar coil

Data
Thickness (mm)
Length (m)
Diameter(mm)
Connecting Size (inch)
Instruction of the solar coil
Type
150L
1.0
19
15.88
1/2' male thread
16
200L 300L
1.0 1.0
19 19
15.88 15.88
1/2' male thread 1/2' male thread