Technical task of the technical assignment for the modernization of ventilation in scientific research institutes

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Technical task

for the modernization of the technological equipment of the ventilation systems of the laboratory building No. 451.452 of building 17 at the address: Moscow

1. General Provisions

1.1. This technical task provides for the implementation of the modernization of the process equipment, control systems and automation of ventilation systems of the building, laboratories No. 451,452 of building 17.

1.2. To perform the work, develop working documentation for sections of AOB, EM, XC, AHS, AK grades, which should be agreed upon in the established order.

1.3. Works should be performed in compliance with the requirements of regulatory and technical documentation.

1.4. Upon completion of the work, submit the as-built documentation executed in accordance with the requirements of GOST and SNiP.

1.5. Hand over the work done to the customer.

1.6. Certain provisions of this Terms of Reference may be updated in the process of work in consultation with the Customer.

2. Technical requirements

2.1. Modernization of control units for heat, cooling supply of ventilation systems.

2.1.1. Heating control units.

Upgrades are subject to:

· Control units for heat supply of the first heating of ventilation units K1, K2, K2a, K4 of the MIK-V, P2, P6 building of the laboratory No. 452, P1 of the laboratory.

· Units for regulating the heat supply of the second heating of ventilation units K1, K2, K2a of the MIK-V building.

Existing heat supply control units are subject to dismantling, at the same time, a part of the equipment of control units (circulation pumps, valves) corresponding to the state and technical characteristics is to be used in the mounted control units.

The composition of the equipment of the installed control units, as well as the equipment used is indicated in Appendix No. 1.

To conduct hydraulic tests of the heating circuits and heaters of ventilation systems with the registration of the act of hydraulic tests.

Paint pipelines and heat insulation works.

2.1.2. Units for regulating the cooling of ventilation systems.

Cooling units of ventilation units K1, K2, K2a, K4 of the MIK-V, P2, P6 building of the laboratory “452, P1 of the laboratory No. 451 are subject to modernization.

The scope of work:

· Replacement of thermostatic valves of cooling supply control units;

· Disassembly / assembly of the K1 compressor / condensing unit fan;

· Dismantling / installation of filter driers of K1, K2 condensing units;

· Dismantling / mounting of the K4 ventilation unit evaporator;

· Pressure testing in inert gases, vacuuming, filling refrigeration circuits with freon;

· Restoration of thermal insulation of pipelines.

2.1.3. Humidification feed units.

At the nodes of the irrigation chambers of the air conditioners K1, K2, K2a, install cold water purification filters.

2.2. Control cabinets and automation of ventilation systems.

Control cabinets of ventilation units K1, K2, K2a, K4, RU3, B1, B2, B3, B6, B7, B8 of MIK-V, P2, P6, B1, B2, B3 laboratories No. 451, P1, B1 of laboratory No. 452.

The layout of the newly installed control panels:

SHUA K1 - control and automation cabinet of the air handling unit and the condensing unit (KKB) of the air conditioner К1 (МИК-В);

SHUA K2 - control and automation cabinet of the ventilation unit and ККБ conditioner К2 (МИК-В);

SHUA K2 - control and automation cabinet of the ventilation unit and air conditioner ККБ К2а (МИК-В);

SHUA K4 - control and automation cabinet of the air handling unit and air conditioner ККБ conditioner К4 (МИК-В);

ShUV– control cabinet of exhaust installations RU3, В1, В2, В3, В6, В7, В8 (МИК-В);

SHUA P2, P6 - control and automation cabinet for ventilation units and condensing units P2, P6 (laboratory №452);

ShUV– control cabinet of exhaust installations В1, В2, В3 (laboratory №452);

ShUA P1, B1 - control and automation cabinet for ventilation units P1, B1 (laboratory №451).

Modernized control cabinets should provide:

· Selection, from the front panel of the cabinet, control mode of ventilation units (manual / automatic);

· Light signaling of regular and emergency modes of operation of technological equipment of ventilation systems (work / accident);

· Shutdown of ventilation systems in case of fire;

· Automatic activation of protection and blocking of equipment operation in case of emergency situations.

Frequency converters for controlling electric motors of fans and pumps are to be used further.

2.3. Automation and dispatching system

The automation and dispatching system is designed to control and monitor the operation of ventilation systems, as well as to collect, process, present and store incoming information.

2.3.1. Automation system.

The automation system should ensure, in the main, the autonomous functioning of the ventilation systems, which does not require the intervention of the operating personnel and, if necessary, switch to manual control mode. In any control options and regardless of the state of the local controller, the condition for automatic shutdown of the general ventilation system in case of fire should be maintained. Disconnection should be made individually for each system while maintaining the power supply of the antifreeze circuits.

Local automation of ventilation systems should include:

· Regulation of the supply air temperature at the outlet of the ventilation unit or, if necessary, the temperature of the exhaust air from the room served;

· Regulation of the humidity of the supply air;

· Stopping of fans and closing of air valves when fire alarm is triggered;

· Shutdown of air conditioning humidification when the fan stops;

· Opening and closing of the air valve, respectively, when the fan starts and stops;

· Automatic heating of heaters before starting systems in winter mode;

· Protection against freezing of air heaters through the air and water (shutting down the fan, closing the air damper, opening the heating valve for 100%);

· Shutdown of the fan in the absence of pressure drop;

· Control of pollution of filters of installations.

The remote effect on local automation with AWP is determined in the following scope:

· Changing the settings of temperature and humidity regulators;

· Enable / disable settings.

The existing peripheral equipment of the automation system is subject to verification, cleaning and further use in the following order:

· Temperature and humidity sensors of ventilation units are subject to verification;

· Differential pressure sensors are to be checked and cleaned;

· Thermostats for protection of heaters from ventilation units against freezing must be replaced.

· Drives of control valves of control units are to be replaced in accordance with clause 2.1.1.

· Drives of air valves are subject to check and further use;

To control the recirculation of the air conditioner K1, replace the on-off actuators of the air valves with a control signal of 0..10V.

2.3.2. Dispatch system.

The composition of the dispatch system include the following components:

· A set of measuring devices, actuators and automation equipment based on Honeywell software and hardware ;

· Multifunctional cable system;

· A set of software and hardware dispatch center.

For dispatching ventilation systems, provide for the display, archiving and logging of the following information:

· Graphic image of installations with temperature and humidity sensors, thermostats from freezing, differential pressure switches, control valves, air humidifiers, air valves;

· Installation numbers;

· Readings of temperature and humidity sensors;

· Readings of differential pressure sensors;

· Readings of the position of control valves 0..100%;

· Mode "work / stop" of fans;

· Mode "work / stop" of pumps;

· The position of the air valves "open / closed";

· System shutdown when fire alarm is triggered;

· System shutdown in case of a threat of freezing of the heater;

· Stop the installation in the absence of a pressure drop across the fan;

· Shutdown of the humidifier when the air conditioner fan is stopped;

· Systems work according to a specified time schedule or without it;

· Alarm of accidents and abnormal situations in case of malfunction of the equipment, as well as the output of the values of the technological parameters beyond the specified ranges;

· Registration of accidents and abnormal situations in the message log;

· Log of parameters for the current time, indicating the name of the monitored parameters, units of measurement, controller number and input / output channel.

2.3.3. The power supply of the automation and dispatching system should be carried out from the AC network of 380/220 V, 50 Hz with the use of uninterruptible power supply units on rechargeable batteries and provided as power supply to the first category electrical receivers

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