1, the requirements of water
When the sprinkler uses the river ditch or pond as a source of water, pay attention to that all the ends of the suction pipe are not in the water. Should choose a relatively clean water source, avoid inhaling stones or more sand, drift debris, and easy to plug the filter. If the water source is shallow, it is necessary to dig up the water absorption area in advance so as to ensure that it does not contain impurities and air.
2, plus water diversion
 When the sprinkler self-priming pump is used for the first time, it needs to divert water. If you are not idle for too long, you do not need to divert water. Old centrifugal pumps have been drained every time and have been eliminated by most manufacturers.
3, the inlet pipe must be vacuum
 When the sprinkler is absorbing water, the inlet pipe system must maintain a certain degree of vacuum in order to draw water into the tank. The inlet pipe system must be sealed reliably, the hose must not be damaged, and the hard pipe must not be cracked.
4, parking stalls
  Before the water sprinkling vehicle or water sprinkling, the power take-off device must be parked. Slowly loosen the clutch during gearing to avoid possible damage to the power take-off.
5, winter water
Before the advent of winter, the water in the sprinkler pumps and pipes should be vented to prevent freezing. Therefore, after the watering is over, the water in the water pump and the water pipe will be drained immediately to prevent future troubles. The water pump is equipped with a drain switch.
6, watering precautions
 The front sprinkler of the sprinkler is located at a lower position and close to the ground. The spray pressure is relatively large and is used for flushing the road surface. The position of the rear sprinkler is relatively high and the sprinkler surface is wider for watering the construction. When simply using the rear nozzle, the front nozzle should be closed to achieve better results.
7, lubrication and fastening
 During the use of the sprinkler , lubrication points of the transmission assembly must be regularly lubricated, and the joints are often tightened to ensure normal use.
8, regular sewage
 There is a filter setting at the sprinkler valve. After a period of use, it should be regularly cleaned and the sludge in the filter should be removed. Otherwise affect the pumping.
Characteristics
1. Rooftop packaged unit is single packaged type central Air Conditioning with its own cold source and air cooling. Factory assembled, tested and shipped complete with compressor, evaporator and condenser coils, fans and controls. They may be used for cooling only type, heat pump type, cooling only with electric heater type, constant temperature and humidity type etc.
2. The units are ideal for residential, commercial and industrial applications and are available in nominal cooling capacity from 10kW to 380kW/3TON to 100Ton.
3. Environment friendly refrigerant R407C, R410A and R134A.
4. It can be special design based on project needed, such as vertical type, stainless steel casing etc. Mainly used for office, commercial building, supermarket etc and easily installation and maintenance.
5. Operation range of outdoor temp. is from -10℃ to 45℃. And if T3 tropical design, the highest outdoor temperature could be 53 ℃.
6. Sturcture: Panels and frame are made from galvanized steel protected with polyester powder painting to ensure total resistance to atmospheric agents. Direct expansion coils with condensate drain tray.
7. Hermetic compressor: High efficiency scroll compressor for the whole range, with built-in thermal overload cut-out and crankcase heater, mounted on rubber vibration dampers.Ripple type acoustic insulation for compressor section, and thermal insulation for coil and fan section, low noise.
8. Centrifugal fan: Forward curve centrifugal fans for air treatment section and axial fans for condensation section. Front, side and underside air discharge of the treasment unit. High external pressure, long air supply distance.
9. Electric panel: Electric panel consists of breaker and contactors for compressors and fan motors, phase sequence relay and other necessary protection devices for the main components.
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Jinan Amrta Air Conditioning Co.,Ltd , http://www.amrtaac.com