HP727 Single speed swimming pool heat pump controller Operation manual TABLE OF CONTENTS 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. General Description Specifications Installation Instructions Electrical Wiring Instrument Wiring Instrument Identification Operation Service and Calibration Troubleshooting Defrost Cycle Sequence Temperature Sensor Chart Advanced Applications 1 \\NTS40PDC02\BINDERS\1_BINDER\08_HP7XX\09_HP727\HP727_03.
1. GENERAL DESCRIPTION The HP727 is a powerful microcomputer control designed for use in an outdoor swimming pool heatpump. The control features 3 digit temperature display and 3 push button keys. All adjustments are performed by simple key operations. The HP727 controls the main compressor contactor, the 3 evaporator fan speeds, and the water circulating pump. The HP727 monitors both evaporator and water temperature using precise thermistor sensors for superior control.
. INSTALLATION INSTRUCTIONS UNPACKING Examine the package on reception for any signs of external damage it may have received during transit. If damage is found, notify the carrier immediately. Notify manufacturer or their agent immediately of any deficiencies. INSTALLATION: Take care in handling the Printed Circuit Board ( PCB ) so as not to damage or scratch the silicone conformal coating. Damage to this coating will affect the resistance to moisture and humidity.
5. INSTRUMENT WIRING DIAGRAM Wiring Diagram Brown Black & White CAP Low (Red) F FAN Med (Blue) COMPRESSOR S HP727 Control Board C RLY1 RLY2 RLY3 Yellow Yellow White Brown Remote switch Pool (opened) Spa (closed) Water sensor Black 24 Vac Defrost sensor Low pressure switch Closed = OK Opened = low pressure Flow switch Closed = flow Opened = no flow R 24 Vac compressor contactor 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 High pressure switch Closed = OK Opened = high pressure Herm.
6. INSTRUMENT IDENTIFICATION Pool LED Heat on LED Spa LED Increase key Decrease key Service / Select key DESCRIPTION OF FRONT PANEL: POOL LED: Indicates that the Pool setpoint is selected. SPA LED: Indicates that the Spa setpoint is selected. HEAT ON LED: Indicates that the pool heater ( heatpump compressor ) is on, heating the water. DIGITAL DISPLAY: Normally displays the actual water temperature. In set mode displays other parameters.
7. OPERATION: WHEN POWER IS FIRST APPLIED TO A FACTORY UNIT: • • The display will show [888] and the 3 status LED’s will come on for 4 seconds and then go off for 1 second. The pump will go on and then the actual water temperature will be displayed. Factory settings of main parameters: Pool setpoint: OFF Spa setpoint: OFF Filtration time FIL: 8 hours per day The actual temperature displayed is held in memory and displayed for 5 minutes until the water temperature sensor has sampled circulating water.
Note that each time the compressor turns off , there will be a 3 minute anti-cycling delay before it can be turned on again.
ADJUSTMENT OF MINIMUM FILTRATION TIME The HP727 features an adjustable minimum filtration period. Parameter FIL. • A daily 24 hours cycle is divided 6 daily periods of 4 hours ( 240 minutes ). • The adjusted parameter value represent the minimum total daily hours that filtration is required.
8. SERVICE AND CALIBRATION: CALIBRATION AND RECONFIGURATION SHOULD BE DONE WITH CAUTION BY QUALIFIED PERSONNEL ONLY. To enter the service mode, press down the Service key, for 8 seconds, until the display show the message Loc. You have 12 seconds from the time the last key was touched to make an adjustment. 12 seconds after the last key was depressed, any modified value will be stored into EEPROM memory. After that, the unit will return to normal operation mode.
9. TROUBLE SHOOTING: The instrument is capable of detecting a number of malfunctions, which may occur operating conditions. When a malfunction occurs: 1) The heatpump fan and compressor are turned off. 2) The display flashes an error code for 5 seconds. 3) The instrument goes into power-up and restart sequences. If the malfunction persists this process is repeated.
∗ ∗ To get out of the pump lockout mode ( FL3 error code), a button must be depressed. The unit may re-enter FL3 lockout mode if again there are 3 consecutive FLo error detection’s within an hour.
10. DEFROST CYCLE SEQUENCE: The HP727 has an evaporator temperature sensor to regulate the 3 speeds of the evaporator fan when the compressor operates. This sensor is also used in the defrost cycle sequence. The 3 speeds of the fan and the defrost cycle is controlled as follow. Whenever the compressor starts, the evaporator fan speed will be at high for 10 seconds.
11. TEMPERATURE SENSORS RESISTANCE & VOLTAGE CHART: Temperature °F 180.0 °F 175.0 °F 170.0 °F 165.0 °F 160.0 °F 155.0 °F 150.0 °F 145.0 °F 140.0 °F 135.0 °F 130.0 °F 125.0 °F 120.0 °F 115.0 °F 110.0 °F 105.0 °F 100.0 °F 95.0 °F 90.0 °F 85.0 °F 80.0 °F 75.0 °F 70.0 °F 65.0 °F 60.0 °F 55.0 °F 50.0 °F 45.0 °F 40.0 °F 35.0 °F 30.0 °F 25.0 °F 20.0 °F 15.0 °F 10.0 °F 5.0 °F 0.0 °F Temperature °C 82.2 °C 79.4 °C 76.7 °C 73.9 °C 71.1 °C 68.3 °C 65.6 °C 62.8 °C 60.0 °C 57.2 °C 54.4 °C 51.7 °C 48.9 °C 46.1 °C 43.
12. ADVANCED APPLICATIONS: Remote Poll / Spa mode toggle with a remote switch. The unit can control 2 different setpoints: The pool temperature and the Spa temperature. 2 methods can be used to switch the unit between ( Pool setpoint Mode ) or ( Spa setpoint Mode ).