ECOLOGY UNIT AUTOMATIC WASHING SYSTEM
Technical Specification for Self Cleaning ECOLOGY UNIT AUTOMATIC WASHING System
ECOLOGY UNIT AUTOMATIC WASHING SYSTEM is consist of air inlet cell, metal pre-filter, automatic washing system, electrostatic filter, activated carbon filter,( also optional heat recovery coil ) and exhaust fan. In cold climates, since fresh air heating loads are huge, to decrease operating costs and to protect environment, restaurant HVAC systems must be solved by applying heat recovery.
– The unit body shall be composed of double wall panels with 60 mm rock wool insulation and aluminum profiles. Additionally, unit case has Eurovent heat, sound insulation and leakage certificates.
– The unit inlet size is same as the front-face of the ESP. There is an empty cell in order to ensure the uniform air flow at the unit inlet and through the metal prefilter and the ESP. The empty section length is not less than half the section height.
– Pre filter is metal. Metal panel filter is G3 class.
SELF CLEANING ECOLOGY UNIT AUTOMATIC WASHING SYSTEM
– Since the cleaning of the ESP is very important for its efficiency, the unit is equipped with automatic washing system.
– There is automatic washing system between metal pre filter and ESP. The automatic washing system washes both the pre filter and the ESP.
– Automatic washing system is at minimum dimensions suitable for easy installation in a panel of all mechanical and automation equipment. Its dimension is 80 x 120 x 30 cm or less.
– Automatic washing system operates with domestic water line pressure.
– Operates at least 2.5 bar and maximum 8 bar pressure. Operating pressure may be regulated up tu 5 bar.
– The package is ready to use, almost plug and play.
– For the automatic washing system the domestic hot water line is enough to feed the system.
– Automatic washing waste water connection is to a field supplied oil separator.
– The automatic washing system working hours can be adjusted weekly.
– Automatic washing system adjusts both the detergent concentration and the number of washing cycles according to the needs of the user. ( With optional kontrol panel )
ESP CELL
– ESP is selected as cells. Exhaust air flow more than 2,300 m3 / h is not allowed for each cell. ( Cell size 507x444x380 mm. For different flow rates the filter dimensions are calculated proportionally.)
– Exhaust flow rates must be calculated by a mechanical engineer according to the DW / 172 specification, which is also published by MTMD. Exhaust rate calculations must be submitted for approval and stored in a signed form for future references.
– ESP must be installed close to the hood as much as possible. Installation location, duct section, unit connection reducers etc. must be calculated and drawn by a mechanical engineer, and these calculations and drawings must be submitted for approval and stored in a signed form for future refence.
– Ecology unit is modular for the installation of the ESP close to the hood. The other sections ( active carbon filter, the heat recovery and the fan sections ) may also be installed elsewhere.
– The free passage area in the middle section of the ESP cell is least 2.000 cm2. (For 2.500 m3 / h flow rate)
– ESP cell has at least 9 ionizers. Ionizers are in wire structure. (For 2.500 m3 / h flow rate)
– ESP cell has at least 15 m2 collector area. (For 2.500 m3 / h flow rate)
– The ionizers of the ESP cell are loaded with 12 kV and the collectors with 6 kV DC + electricity.
– The power supply has short circuit, arc, over current and thermal protections.
– When the cabin cover is opened, the electricity supply is cut automatically.
– High voltage insulators are made of non-porous polyamide or cestomite. They are not cast porcelain or plastic. Insulators are guaranteed for life time.
– High voltage insulators provide full sealing with the side bearing plates in which they are installed, they prevent the leakage of oil and heat comes with the exhaust air.
– Automatic washing ESP may be made of 304 quality stainless steel ( As an option ). In this option all rods, nuts, etc. elements are made of stainless steel.
– Under prefiltrer, autowash and ESP section there is stainless steel drain pan.
– The ESP has performance test report performed in room conditions. ESP efficiency is 98% and above at a flow rate of 2.300 m3 / h for airborne particulates of 0.5 microns to 10 microns.
ESP and other filters cannot handle gas-like odors. Therefore, activated carbon filter is used after ESP.
EXHAUST FAN
– Temperature of the exhaust air is controlled by control panel as the efficiency of the ESP and activated carbon filters decreases due to increased temperature and increased humidity.
– Exhaust fan is radial type with sparse blade which is easy to maintain.
– Exhaust fan shall be direct coupled plug type to the motor. Belt driven option is available.
– Ecology unit external static pressure value must be calculated by a mechanical engineer. Automatic fan speed control is very important. Our control panel applies a very flexible demand controlled ventilation scenarios based on exhaust air temperature. Temperature based demand control decreases fan motor consumption upto 57%.
– When the fan cabinet door is opened, the power supply of the fan is cut off automatically.
– There is an emergency button for service beside the fan section.
CONTROL PANEL for ECOLOGY UNIT AUTOMATIC WASHING SYSTEM
Automatic control panel is used to keep the ESP and carbon filter efficiency constant. The automatic control panel has the following minimum:
– 7” – LCD touch screen on the stainless steel cabinet is installed in the kitchen where workers can easily see and reach.
– The fan speed is proportionally controlled according to according to exhaust air temperature. Also the fan speed can be adjusted with slide bar on LCD screen or it can be set to the highest speed by single touch.
– Fan Motor operation, electricity consumption and fault information are displayed on the screen.
– The ESP is running or fault information is displayed.
– Stainless steel cabinet has emergency stop button on the control panel.
– In case there is a fault in the automation system or in ESP, there is manual forced start fuse inside the cabinet to start the exhaust fan.
– The fan speed is switched to temperature controlled automatic operation after a user adjustable time. The desired temperature can be set via the display.
– Exhaust air temperature is measured continuously and the fan speed is adjusted automatically if the operating limits are exceeded. The instantaneous extract air temperature and humidity is displayed on LCD screen.
– The weekly operating hours of the automatic washing system is set on the screen.
– The power of automatic washing system is adjusted on the screen according to user needs.
– Control panel automatically adjusts the best washing performance according to the water pressure.
– And implements scenarios that reduce fire risk by continuous watching exhaust temperature.
– Alsol gives fan speed control signal for fresh air supply AHU. Also, for units with heat recovery system, control panel gives control signal for fresh air temperature.
– While heat recovery applications, fresh air supply AHU air outlet temperature control is done by driving the heat recovery circulaiton pump.
– Control panel communicates with central automation system ( BMS ) via ModBus.
– In addition to the above, the following parameters are followed by the automatic control panel and fault alarms are given on the display in case of malfunction.
1- Low hot water supply pressure
2- High hot water supply pressure
- Low water temperature
4- Main solenoid failure
5- Secondary solenoid failure
6- Cleaning chemicals over or dosing pump warning
8- Osilating motors fuse trip
9- ESP fuse trip
HEAT RECOVERY OPTION FOR COLD CLIMATES
The fresh air of the kitchen may be heated by heat recovered from the hot air of the hood exhaust. For this reason, after the activated carbon filter in the ecology unit, there may be a coil for the run-around heat recovery application.
– Coil is made of copper pipe, aluminum fin and copper collector.
– It is suitable for domestic hot water preheating in summer.
– Coil fin spacing is minimum 2.5 mm.
– The heating capacity and water temperatures obtained from heat recovery is sufficient to heat the fresh air from -20 C to 16 C.
Ecology Unit Cleaning and Care
While the ecology unit does not have an automatic washing system as mentioned above:
In order to prevent problems arising from the disruption of cleaning and maintenance, a professional maintenance team must be provided by the ecology unit supplier.
Supplier companies must offer the cleaning and maintenance price quotations covering the wash and change period as well as the filter system.
Following spare parts price list, including ionizer wire, ionizer wire insulator, high voltage transformer, a full ionizer+collector ESP cell, main power switch and complete ESP power panel.
Maintenance of ducts, filters and hoods is very important due to the density of industrial kitchens. Maintenance of hoods must be carried out at least once a week. The ESP of the ecology unit must be washed at least once a week in accordance with NFPA96.
When making the purchase and application contract, the company shall deliver a copy of the ESP maintenance plan, filter maintenance contract and hood maintenance contract to FAIR. During the operation, first Fair will approve the maintenance invoices and then the operation and payment will proceed. As a result, FAIR can check the compliance of the invoices to the maintenance plan.
For more information about ecology units you may visit Ashrae web page.
You may see details of electrostatic filter with automatic washing system