Viconics HP727S - Manual (Page 2)

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1. GENERAL DESCRIPTION
The HP727SS 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 HP727S controls the
main compressor contactor, the evaporator fan, and the water circulating pump. The HP727S 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 HP727S 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.
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 HP727S features full self-test diagnostic capability
and sensor re-calibration if needed.
The HP727S 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 HP727S 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
Fan Relay Output: 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