Viconics HP727S User Manual
HP727S
Single speed swimming pool heat pump controller
Operation manual
TABLE OF CONTENTS
1. General Description
2. Specifications
3. Installation Instructions
4. Electrical Wiring
5. Instrument Wiring
6. Instrument Identification
7. Operation
8. Service and Calibration
9. Troubleshooting
10. Defrost Cycle Sequence
11. Temperature Sensor Chart
12. Advanced Applications
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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
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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.
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3. 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.
Install the board to the front panel using # 6-32 screws. Push ( or remove ) the fast-on connectors at a right angle to prevent bending
the board connectors.
Align and install the lexan cover membrane to the metal door.
4. ELECTRICAL WIRING
CAUTION:
NO HIGH VOLTAGES ARE PRESENT ON THE TERMINALS OF THIS INSTRUMENT ( EXCEPT AT THE FAN RELAYS
TERMINATIONS ) PLEASE READ ALL THE INSTRUCTIONS IN THIS MANUAL CAREFULLY, AND HAVE THE WIRING
DONE BY A SKILLED PROFESSIONAL.
THE INSTRUMENT HAS UNDERGONE RIGOROUS TESTS AND VERIFICATIONS PRIOR TO SHIPMENT TO ENSURE
PROPER AND RELIABLE OPERATION IN THE FIELD. IT IS THE RESPONSIBILITY OF THE USER OR ELECTRICAL
PANEL DESIGNER TO INCORPORATE SAFETY FEATURES ( SUCH AS OVER / UNDER TEMPERATURE CUTOUT
DEVICES ) TO PROTECT THE ENTIRE SYSTEM FROM GENERAL FAILURES.
• All wiring must conform with local or national electrical code regulations.
• See fig. 2 for electrical wiring diagram
• Some wiring to the board is done using 1/4" fast-on connectors.
• The instrument should be wired before applying power !
• 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
• The instrument front panel needs to be splash proof, and protected against the elements.
• The HP727S electronic controller should be mounted inside the control panel is NOT waterproof. The electrical panel must
therefore be properly protected against rain, dust and excessive water vapor condensation.
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5. INSTRUMENT WIRING DIAGRAM
Wiring Diagram
Water sensor
Defrost sensor
High pressure switch
Closed = OK
Opened = high pressure
Low pressure switch
Closed = OK
Opened = low pressure
Flow switch
Closed = flow
Opened = no flow
Black
Black
Light Blue
Light Blue
Purple
Purple
HP727-S
Control Board
RLY1
12345678910 13 14 15 16 1711 12
FILTER
PUMP
Blue
Blue
Red
Yellow
Yellow
Remote switch
Pool (opened)
Spa (closed)
24 Vac
12 Vac
0 Vac
24 Vac transformer
24 Vac filter
pump contactor
Black & White
FAN
White
Brown
Black
Orange (240 Vac)
Red (208 Vac)
L1
L2 or Neutral
Brown
CAP
F
C
COMPRESSOR
S
R
C
24 Vac compressor
contactor
or
Ground
208 / 240 Vac
50 / 60 Hz
Herm.
L1
L2
Wiring727 .dsf
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