Aircooled chiller Lennox 570 kW
- Brand: Lennox
- Power: 570 kW
- Year: 2001
- Article: 52/19
| Cooling capacity | 570 kW |
| Year of manufacture | 2001 |
| Options | with economizer |
| Type of refrigerant | R407С |
| Refrigerant circuit | 3 pcs. |
| Compressors | 3 pcs. Kobe (screw) |
| Number of fans | 9 pcs. |
| Dimensions | 7,4 x 2,3 x 2,3 m. |
| Weight | 5237 kg. |
| Condition | very good |
Chiller was fully renovated some years ago, equipped with a new heat exchanger and a new external covering.
CONSTRUCTION
The chiller is constructed on a solid rugged base frame constructed of “C” section steel beams welded together to form a ridged base. The base is structurally able to carry the unit weight and is torsion ally ridged with no vibrating sections The base is hot dipped galvanised for corrosion protection. The chiller is lifted, moved and mounted via the base frame that contains AVM mounting and lifting points as standard.
The Evaporator is DX type with independent refrigeration circuits. The shell is carbon steel trace heated (option) and insulated. The tubes are copper with enhanced surface area mounted in a U bundle. The evaporator is protected from freezing via the Climatic II control via both temperature and pressure monitoring. The evaporator connections are flanged as standard. Option for a dp flow switch fitted and wired.
The condenser is constructed with enhanced surface seamless copper tubes arranged in a staggered pattern mechanically expanded onto high efficiency aluminium fins. The fins have full fin collars to enhance heat transfer. The fins are rippled but not lanced to provide a surface that can be cleaned to maintain efficiency. The condenser contains an intergral sub-cooler circuit that increases the chiller performance with out additional costs.
ELECTRICAL CONTROL CENTRE
The components of both power and control are split into two sections of one panel. Individual key locked doors access each section, which prevents unauthorised entry. The panel is manufactured to insure protection in all weather conditions.
The electrical system is designed to be plug and play as a customer needs only to connect a power supply to enable the unit to operate all the necessary controls and safety devices are already installed. The panel has an internal thermostatically controlled ventilation system to maintain ideal operating conditions.
Power section contains contactors, thermal overloads for compressors and fans, phase protection, mains isolation and customer connection points. All 3-phase connections are fully shrouded to prevent any accidental contact.
Control is via the CLIMATIC™ II controller that provides full control of the chiller and refrigeration system. All the safety and scheduling of the refrigeration system, compressors and condenser fans. Control of the chilled water system to provide the design off water temperature at the maximum efficiency by matching the system load, ambient and operating conditions at the minimum power consumption.
The Climatic II has a full digital display with trend logging, reading 2050 points of data. Display of all system conditions on a single screen. Alarm signalling and display. Diagnostics by individual refrigerant circuit. Full PID control of chilled water and electronic TEV per circuit with adaptive control logic. Hours run and automatic compressor scheduling. High pressure and low pressure adaptive control to prevent nuisance trips. Anti freeze protection, remote control options.
Options can be added to enhance the level of control and external communications capabilities.
“HUSH TONE” CONDENSER FAN
The new Hush tone condenser fan features six aerofoil pitched blades statically and dynamically balanced. The blades have sickle end section in a bell mouth orifice for reduced noise and improved performance. This fan design is unique to LENNOX.
The fans are direct driven via a three phase motor with permanently lubricated ball bearings. The motors are designed for external operation and are available in 3 different speeds with the option of two-speed motor.
