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Air handling units
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1. Specify the dimensions of the installation location, taking into account the service areas.
2. Environmental conditions
3. Breather valve: the presence of a spring return, resistance
4. Filter: pocket, clean/dirty resistance, filtration class from/to.
5. Class density installation
6. the number of decibels by frequency on all inputs and outputs, as well as to the environment
7. availability of the Eurovent certificate for the selection program
8. Recuperator: type of rotary or plate(plastic), efficiency of selection and minimum, requirements for a rotary or plate recuperator, resistance
9. The need for adiabatic cooling
10. radial Fan: pressure on the network, 10% margin on non-density, engine type EU or frequency-driven, SFP, number of revolutions unnecessary, factory balancing of the entire fan Assembly, ErP compliance, operating frequency
11. water Heater: resistance, complete three-way valve and pump with characteristics, parameters of the heat carrier, material of pipes and fins
12. Specify the temperature and humidity of outdoor, supply, exhaust air for winter and summer
13. water air Cooler: resistance, presence of a drop catcher, complete with a ball siphon and a regulating valve with characteristics, load depending on adiabatic cooling, additionally specify the load and cooling temperature, cooling water parameters(temperature, flow, water resistance), material of pipes and fins
14. Silencer: resistance, number of decibels by frequency
15. Steam device: the resistance, the water capacity, type of steam or adiabatic
16. The air recirculation section?
17. Availability of service sections
18. Starting currents
19. Weight in working condition
20. Availability of I-d diagram
21. Automation: built-in (Protocol)/without
22. The functionality/availability of sensors and mechanisms to ensure:
22.1. Regulation of the recovery in the dew point;
22.2. Blocking the activation of supply installations simultaneously with the start of fans;
22.3. Modes of operation setup set the air flow;
22.4. data Monitoring (flow, temperature, pressure drop on filters, SFP);
22.5. Setting up regulatory regimes for the supply and exhaust air;
22.6. control Modes: constant flow, constant pressure and 0..10V;
22.7. The air flow is considered on the basis of density;
22.8. The imbalance of supply and exhaust to reduce flow in the heat exchanger;
22.9. Regulation of the inflow temperature according to the room temperature for heating, cooling, optimization of the recuperator operation within certain limits;
22.10. Setting the inlet or exhaust air temperature;
22.11. Regulation of the inlet or exhaust temperature by the outdoor air temperature;
22.12. The average value of the sensors;
22.13. Time offset of the setpoint;
22.14. Setting the winter/summer mode by outdoor temperature;
22.15. Setting the heating/cooling sequence;
22.16. Management: heat recovery unit, heater, cooling section, recirculation, reduction and increase of air consumption;
22.17. Night cooling;
22.18. Timer, calendar;
22.19. Monitoring the efficiency of the utilizer, electric, heat, and refrigeration energy consumption;
22.20. Control of differential pressure on filters, alarm limit values;
22.21. Calibration of the filters when replacing;
22.22. Multiple air supply zones;
22.23. The pressure drop across the heat exchanger, freeze protection;
22.24. Control of dehumidification/humidification sections;
22.25. Switching on the pumps of mixing units on demand, idle run;
22.26. The control of the individual fans;
22.27. Control of air flow according to CO2, VOC;
22.28. Manual and automatic control of installations;
22.29. Automatic control of circulation pumps of the heat and cold supply circuit of ventilation systems;
22.30. Protection of air heaters from freezing;
22.31. Freezing control of recovery sections;
22.32. Automatic control of indoor air temperature;
22.33. Control of the outdoor and supply air temperature;
22.34. Air pollution control air filters;
22.35. Dynamic maintenance of air flow with consideration of filter contamination;
22.36. operation of installations in automatic mode, according to the schedule, scenario;
22.37. Automatic switching on of the reserve circulation pump of the heat carrier in case of failure of start-up or failure of the working pump to the mode within the set time;
22.38. Control and regulation of the water flow in the convectors;
22.39. Control and regulation of the coolant flow in the fan coil heating and cooling circuit;
22.40. Distributed zonal control of climate parameters;
22.41. Displays information about the status, alarms, and current readings of subsystem parameters on the graphical panel of control panels, on a removable or portable panel;
22.42. Output information about the status, alarms, and current readings of subsystem parameters in the IFC DP;
22.43. Monitoring the availability of power in subsystems;
22.44. Accounting for operating time and wear of the main equipment;
22.45. Manual and automatic selection of the main and backup unit, taking into account the operating time.
22.46. Protection against motor overheating
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