Compound stacked low-temperature chiller consists of two or more independent refrigeration systems, each of which can be single-stage or two-stage compression refrigeration system. These two parts are linked by a condensing evaporator, which is both the low-temperature cycle of the condenser and the high-temperature cycle of the evaporator, that is, the evaporation of refrigerant in the high-temperature cycle is used to condense the refrigerant in the low-temperature cycle. In this way, the heat absorbed by the low-temperature cycle (refrigerant) is transferred to the refrigerant of the high-temperature cycle, and the refrigerant of the high-temperature cycle transfers the heat to the ambient medium (air or water).
Compound low-temperature chiller refrigeration cycle can meet both in the lower evaporating temperature has the right evaporating pressure, but also to meet the ambient temperature in the moderate condensing pressure. 1. According to the scheduling instructions, open the equipment specified in the instructions in a timely manner.
2. Open the gate opener, such as electricity off start, the handle must be detached from the rotating shaft, such as manpower, turn off the power will be inserted into the handle shaking.
3. The gate opener should be used to guard the machine when opening and closing, to be stopped before leaving the machine, never allowed to put into operation, then leave.
4. Open the rotating grille should be strictly in accordance with the requirements of the use of rotating grille implementation, and guard the machine ten minutes, check the mechanical equipment for abnormalities before leaving the machine, never allowed to be put into operation, then leave.
5. In the pool water level to reach the elevation of the process regulations, before starting the pump, while according to the pool water level and on-duty scheduling to get in touch. 1. According to the scheduling instructions to open the switching wells in and out of the water gate, close the other gates.
2. Before starting the pump, should be to the packing box on the receiver, the introduction of water lubrication rubber bearings, to be pumped out of the water can be turned off small, there is water dripping out of the appropriate, check the pump bearing oil level, to ensure that all parts of the water, oil circuit is smooth.
3. Before starting the pump, check the connecting parts should not be loose, rotate the coupling by hand to see if it is flexible, and whether there is a loud noise in the pump.
4. When the pump starts, the machine shall not stand next to people, after the start should be at least five minutes to check the equipment, such as abnormal vibration and sound or water out of the situation is abnormal should be utopian downtime to check, and never allowed to put into operation immediately leave the machine pump.
5. pump in operation, should pay attention to the following matters:
(1) check whether the work of each instrument is normal, stable, pay special attention to the ammeter is more than the rated current of the motor, the current is too large, too small should be immediately shut down to check.
(2) whether the pump flow is normal, check the water flow of the outlet pipe, according to the change of water level in the pool, estimate the running time of the pump, and timely contact with the scheduling.
(3) check whether the pump packing pressure plate is hot, drip is normal, not less than eight times per shift.
(4) pay attention to the unit's ringing, vibration.
(5) check the bearing motor temperature rise, abnormalities should be immediately shut down, notify the duty scheduling.
(6) Check whether the grille and water inlet are blocked, whether the water level is too low.
6. Pump motor in the cold state is generally allowed to start six times in a row, the interval between the two at least fifteen minutes. 1. To meet the process requirements or accept the scheduling instructions, should be immediately shut down, close its gate, after the shutdown, the use of equipment should be scrubbed clean, clean up around the equipment.
2. After the freezing season shutdown, the pump should be removed from the water to avoid damage to parts.