Assessments - 3, GPA: 3.7
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3) Press the timer-on button again, and the set up is cancelled. 4) If the on/off button is pressed while the unit is under the timer on setting, the unit will start immediately. The timer setting is at that point cancelled. Timer-Off Switch 1) When the heater is on, press the timer-on button to set time for the timer-on switch. Press the button once to change the time interval of 1 hour in a cyclic manner of 1,2,...24,1,2 (The display shows the previous time as the starting time of the present setting) Page 14 Premier Heat Pumps – Water Heater and Chiller Manual 2) When it reaches the switch-off time, the heat pump water heater will automatically shut down. 3) Press the timer-on button again, and the set up is cancelled. 4) If the on/off button is pressed while the unit is under the timer-off setting, the unit will shut down immediately. The timer setting is cancelled. 5) Timer-On and Timer-Off cannot be set at the same time. Coercive Defrosting 1) Press the button, the heater will go into the defrost mode. 2) After 3 minutes, when the units coil temperature has reached 10°C or the time of defrost reaches 8 minutes, defrosting is stopped. 3) After exiting the defrost mode, the heater will stop operation for 3 minutes, then it will run in the mode before defrosting. (This key is invalid for single mode water chiller) Page 15 Premier Heat Pumps – Water Heater and Chiller Manual 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 10C-35°C in cooling mode. Original TC is 18°C. When T1.T°C -1°C, Compressor and fan motor stop; When T1.T°C +1°C, Compressor and fan motor start. 2) TC can be set between 45°C -60°C in heating mode. Original TC is 50°C. When T1.TC-1C, Compressor and fan motor start; When 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) T4.-5°C lasts for a while; 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 Page 16 Premier Heat Pumps – Water Heater and Chiller Manual minutes. 2) Parameters for Exiting Defrost Mode: • When defrosting time reach 3 minutes and T4 reaches 10°C or defrosting time reaches 8 minutes, defrost exits and starts heating water mode. While defrost is exiting, after compressor and fan motor have stopped for 1 minute, the four way valve1 is turned off. • The Compressor will restart after it stops for 3 minutes, and the system will run the same mode as before defrosting. 5-3 Fault Codes and Fault Descriptions Failure Code: E1: sensor for T1 (water temperature) failure E2: sensor for T2 (ambient temperature) failure E3: sensor for T3 (exhaust temperature from compressor) failure E4: sensor for T4 (coil temperature in condenser) failure E5: Compressor stops three times in 24 hours because the current is too high. E6: While heating water, there is three times of T3.100°C in 24 hours. E7: There is electrical leakage in the compressor or outdoor motor or four-way valve Recommendation: Contact the installer or service agent 6 - Maintenance Instructions The following operational maintenance must be done by a qualified person each year: • Clean the back evaporator with a delicate brush and water jet without any pressure (karcher prohibited) • Check the mandatory labelling and the operation of the unit • Check the safety measures • Check the pressure of the refrigerating gas • Clean the electric box and control the connections • Check the electrical connections Page 17 Premier Heat Pumps – Water Heater and Chiller Manual 7 - Gas Flow Diagram Page 18 Premier Heat Pumps – Water Heater and Chiller Manual Page 19 Premier Heat Pumps – Water Heater and Chiller Manual 8 - Wiring Diagram Page 20 Premier Heat Pumps – Water Heater and Chiller Manual 9 - Problems and Solutions Please refer to the table below for the most common problems. These can often be solved by reading the table below. If nothing corresponds to the list,...
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