Viconics HP727 - Manual (Page 2)

2 2
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.
The control features full diagnostics messages, simplifying both installation and service. The HP727 is an excellent alternative to
electromechanical controls offering improved water temperature control accuracy, accurate defrost control, anti-short cycle timer,
and solid-state reliability all in a single package.
The HP727 features three speeds fan motor control for optimum efficiency and minimum acoustic noise.
All calibration and user parameters are stored in an EEPROM memory. There are no trimmer potentiometer adjustments. All
adjustments including sensor calibrations are done through the front panel. The HP727 features full self-test diagnostic capability
and sensor re-calibration if needed.
The HP727 offers maximum corrosion and vibration protection. All printed circuit board interconnections are soldered. The main
PCB is dipped in silicone. This assures maximum board protection even underneath the PCB components, against humidity, air
pollutants, chlorine vapors and vibrations.
2. VICONICS HP727 SWIMMING POOL HEATPUMP CONTROL SPECIFICATIONS
OPERATING CONDITIONS:
Rated Operating Conditions: 33 °F to 120 °F; R.H. 0% to 100 %, Non-Condensing
Storage: - 40 °F to 120 °F; R.H. 0% to 100 %, Non-Condensing
PERFORMANCE:
Accuracy: ± 1.8 °F
Repeatability: ± 0.2 °F
Resolution: ± 1 digit
INPUTS:
Swimming Pool Water Return Temperature Thermistor Sensor ( 0 °F To 120 °F )
Evaporator Defrost Temperature Thermistor Sensor ( 0 °F To 120 °F )
Contact From Remote High Pressure Switch Dry Contact Input
Contact From Remote Low Pressure Switch Dry Contact Input
Contact From Main Flow Switch Dry Contact Input
Contact From Remote Spa Select Flow Switch Dry Contact Input
OUTPUTS:
Compressor Relay Output:: 1A @ 24 Vac
3 Speeds Fan Relay Outputs: 4A @ 240 Vac
Circulating Pump Relay Output: 1A @ 24 Vac
GENERAL:
• Complete Diagnostic Error Messages
• Display: 3 Digits Display 0.56" High
• LED Status Indicators: Pool mode LED, Spa mode LED and Heat on LED
• Power supply : 0 / 12 / 24 Vac center tap transformer ±10% 50\60 Hz
- 5 VA required on 12 Vac for controller only
- 100 VA maximum for 24 Vac power connection
• Dimensions: approx. 5.5" x 6.0"
• Weight: 700 gm (1.51 lb.)
• Protection Against Humidity: Unit dipped with silicone based conformal coating
• Connectors: 1/4" fast-on connectors; screw terminals for field connections
• cCSAus file # LR92123
Important note: Heatpump unit should not be operated when outdoor air temperature is near or under freezing point; or as
specified by manufacturer of heatpump.