Content 1. Introduction ......................3 2. Safety ........................3 3. Construction and application ................8 Construction ....................9 Configuration ....................9 Components ....................10 Accessories: ....................10 Overall and joined dimensions ..............11 4. Transport and storage ..................13 Transport ......................13 Loading ......................13 Storage ......................13 5.
1. Introduction The high efficient heat recovery units, manufactured by TANGRA, are produced in accordance with all applicable Bulgarian and EU requirements. Their installation and usage should be done according to the following instruction.
Page 5
• Before carrying out repairs or maintanance on the ventilator sections make sure that the power supply is disconnected and it could not be switched back on unexpectedly by another person. • Before opening the fan section safety doors turn off the electrical power supply of the motors using the safety switches mounted outside the fan housing.
Page 6
High humidity. Direct entry of water. The electrical board should be installed in designed place covering the requirements for “IP” protection and fire safety. • Do not leave objects in front of mounted electrical board that could prevent the freely access and visibility to the board (e.g.
Page 7
• Before starting the unit, ensure that all safety devices have been correctly installed and are in perfect working order; if the above is not the case, do not start the unit and inform the head of safety or department manager immediately. •...
Page 8
• During maintenance and cleaning of the fan rotor, be particular careful of the rotor. This can lead to parts of the body becoming trapped and seriously injured between the rotor itself and fixed parts of the fan housing. • Even when the fan is disconnected from the power supply, the rotating parts can still turn due to any air movement through the fan.
3. Construction and application Highly efficiency heat recovery units for second time use of heating / cooling of the exhaust air in the ventilation and air conditioning systems. They are intended for work into non- aggressive and non- sparking environment. The series of heat recovery units covers debits from 250 up to 3200 m3/h (fig.1).
As standard heat recovery units are designed for climate conditions and air specifics of the Sofia region, Bulgaria. The air density factor should be corrected when these units are calculated for higher altitude. Operation temperature from -20°C up to +40°C. Construction The supporting construction is made by anodized aluminum profiles from each side closed with heat...
Components • Fan Exhaust and supply fan - double inlet centrifugal fan with built in motor - CBM - "S&P" - Spain. Protection class IP20. (IP44 - on request) • Plate heat exchanger High efficient plate heat exchanger – air-to-air (efficiency up to 85%) •...
4. Transport and storage Transport The units are supplied fully assembled on a pallet. When transport the unit use its original packing and follow instructions given. All operations involving the lifting and handling of the unit must be carried out with the utmost caution, avoiding any knocks that could compromise the functionality or damage the unit components.
5. Installation and maintenance Installation There are four possible installation types, in compliance with UNI 10615 specifications: • Type A: open intake and outlet. • Type B: outlet connected to a pipe and open intake. • Type C: intake connected to a pipe and open outlet. •...
fig.2 fig.3 6. Commissioning Construction • Ensure that there are no foreign bodies inside the device, and that all the components are securely in place. • Manually check that the fan does not come into contact with the sides. • Make sure that mounting bolts or duct do not interfere inspection panels.
Page 17
fig.3 • On/off and variable speed control е - fig.4 Power supply 50Hz N -neutral 2-Fuse holder with spare ( fast, ceramic) 3-Regulated output to motor 4 –Not regulated output for connecting lamp, valve, dampers…or tree wire connection branched off after switch (Imax :2A) fig.5 Input: to by-pass switch.
Page 18
• Automatic PLC control with LCD display - fig.6 Номинален ток Типоразмер Номинална мощност Rated current Type size Nominal power EVB 04 HiE 2 х 180 2 x 0.85 EVB 06 HiE 2 х 300 2 x 1.38 EVB 08 HiE 2 х...
S1, and turn off the power supply to the electrical board. Take all necessary measures to prevent fire, electrical shock or environmental pollution and contact TANGRA’s local service team Contacts:...
9. Applications Check card We recommend that you carefully fill it, during and after the initial star up of the unit. 1. Supply fan: /measured/ /nominal/ Model: Phase: (from (from Installer) Manufacturer) 2. Exhaust fan: /nominal/ /measured/ [A] Model: Phase: (from Manufacturer) (from Installer)