discount 70% in 2018-10-14 to 2018-10-16
price: USD$ 686.00
freight :USD$7.00,(Postal parcel)
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Application of variable frequency control of circulating pump in central air conditioning system. Variable frequency control of refrigerating pump and cooling pump. Automatic control of temperature, pressure or temperature difference and pressure difference can be set up. * general variable frequency operation mode * full frequency operation mode * variable frequency pump cycle, pump directly into power frequency pump mode * power frequency operation mode
* universal frequency conversion operation mode
In this mode, system of pump, the first to start the pump inverter, if in a given period of time can not meet the need of setting, the pump switch to power frequency, then the inverter restart a pump cycle; system stops, the pump will automatically remember the no.. The next start, the system will start from the next pump number, so that the pump working time balance.
This mode is suitable for most of the frequency conversion constant pressure water supply modes below 15KW
* full variable frequency operation mode
In this mode, each pump needs to configure a corresponding converter, start and cycle mode is the same
* frequency conversion pump cycle, pump directly into the power frequency pump mode
This mode is suitable for high power pump group to operate in simple control mode. Please note that in this mode, the circulating pump rotates regularly and rotates (the timing of pump changing is not zero). When the pressure is not enough, when the pump is added, the power frequency pump is operated directly. The power frequency pump can be operated by soft start or other step-down start-up mode. Note: the frequency conversion pump starts once every time, and then switches to the next one to run first. When the pump time is set, the system will stop, and then the inverter pump will be re run to the next one.
* power frequency operation mode
This mode is full power frequency operation of small power pump, and the pumps configured in operation are put into operation in turn
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