5 - Instructions for the Installer
The installer must read the following and provide instructions to the purchaser.
5-1 Unit controller and parameters
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 required.
•The meaning of the 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
2)TC can be set between 45°C
T1≥TC+1C, Compressor and fan motor stop. When compressor is running, if T2≤12°C, the four way valve2 on; if T2≥12°C, 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)
b)compressor runs continuously for more than 5 minutes
c)Compressor runs accumulative total for 45 minutes
While the system begins to defrost, compressor and fan motor stop first and four way valve1 is on after 1 minute and begins to work. The compressor restarts after it has stopped for 3 minutes. If the sensor for T4 is damaged, the system begins to defrost, after the compressor has run continuously for 45
Premier Heat Pumps – Water Heater and Chiller Manual | Page 16 |
