Pressure differencial controller is a safety device in order to prevent compressor because of low lubrication oil pressure of compressor. If in
60 seconds after compressor starting, it still maintains low lubrication oil pressure ,the pressure difference controller will start to cut off to ensure system safety.
It must be installed at a small vibration position .The pressure chamber marked "Low pressure" must be connect to low pressure side (crankcase of compressor). Another pressure chamber marked "high pressure" must connect to outlet of lubrication oil pump.
Push reset button first after power supply. To reset because of system that leading to controller cut off, it have to be resetted after 5 minutes. Otherwise ,it won't function .The factory setting point is 0.1Mpa.
When wiring, comply with electic regulation and power supply requirement in order to avoid damages.
Factory setting is under 380V of power supply. If you want to use 220V power supply, you must disconnect D1 and X, then connects D2 and X terminal.
Shanghai Thermostat Factory Co.,Ltd. is a professional manufacturer of refrigeration and air condition auto-control unit .We have more than 60 years history in this industry.
In 1985,STF cooperated with ALCO to produce T series expansion valves .We are the only Chinese company having the mixed infusing technology in expansion valve production. In 1993, Shanghai Johnson Controller Co., Ltd. was established by us and Johnson to produce YK series controllers. In 1996, FDF-M diaphragm solenoid valve was certificated as National Grade New Product . As a high-tech enterprise ,we get innovation fund from the government.
Our main products include solenoid valves, thermostatic expansion valves, sight glasses, filter dryers, pressure controls, pressure difference controls, temperature controls,check valve and ball valves. We have gained approval for our quality control system in relation to international standard ISO9001:2008. UL/CUL、CE ＆ CQC approval can be supplied to order.
Products are widely used by Carrier, YORK, Trane , Dunhambush , McQuay , Midea , Gree etc. and exported to America, Europe, Australia, Africa, Korea, Hong Kong, Philippine and Taiwan.
We stick to the development of specialization ,give the best solution of localization and keep advanced in technology by continual innovation. We are always pursuing to be a leading enterprise in our area.