Description And Operation Of The Controller - Astralpool BM100 Manuel D'instructions

TECHNICAL MANUAL. START-UP AND OPERATION
E. Description and operation of the controller
NA6888 User Guide
Main Function and Technique Index
Main Function:
the controller is the special controller for heat pump water heater, it contains 2 temperature sensors (water temperature,
outdoor temperature), 2 control outputs (compressor, defrost) and one alarm signal input (used for high and low pressure protection). Its
main function is showing below.
Temperature Display and Controlling:
tank between the temperature upper and lower limit.
Auto Defrost Controlling:
it has defrosting controlling logic of heat pump optimization design, and can defrost effectively in order to ensure
that the outdoor machine can run normally at low temperature, you can set several kinds of defrost way: four-way valve defrost, bypass
valve defrost or electric heat defrost.
External alarm:
one outside alarm input, it can be set to 5 modes: always open, always open locked, always closed, always closed
locked or forbidden.
Others:
temperature upper and lower limit can be set, direction of four-way valve can be set, compressor start delay protection,
temperature sensor error alarm and so on.
Main Technique Index:
- Temperature display range: -50/150°C (the step is 0.1°C) - Temperature setting range: -45/145°C (the step is 0.1°C) - Power
supply: AC 220V±10% or AC 380V±10% 50Hz (refer to the wiring diagram)
- Operating environment: temperature -20Cº/50Cº, humidity
load)
- Temperature sensor: NTC R25=5k
- Executive standard: Q/320585 XYK 01-2004 (NA8824-HTD)
Operating Guide
16
it can display water tank temperature and outdoor temperature, and control the temperature in water
92 , B (25/50) =3470K
Panel
<_
85%. - Relay contact capability: 2 A / 380 V AC (pure resistive