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Summary of Contents for VTS Medical Systems ventus PRO 2022
- Page 1 2022 VENTUS PRO AIR HANDLING UNITS OPERATION, INSTALLATION AND MAINTENANCE MANUAL OIMM – VENTUS PRO Ver. 1.0.0 (31-05-2022)
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Page 2: Table Of Contents
CONTENTS GENERAL INFORMATION AND SAFETY INSTRUCTIONS TRANSPORT AND STORAGE FOUNDATION, ASSEMBLY, CONNECTION OF UNIT-RELATED SYSTEMS AHU SUPPLIED IN SECTIONS AHU SUPPLIED IN PACKAGES FOR ASSEMBLY ON SITE AMBIENT CONDITIONS FOR AHU INSTALLATION / WARUNKI ZEWNĘTRZNE DO PRACY INSTALACJI URZĄDZENIA CONDITIONS FOR AHU ASSEMBLY CARRIED OUT BY VTS AUTHORIZED SERVICE INSTALLATION CONNECTIONS 3.6.1... -
Page 3: General Information And Safety Instructions
GENERAL INFORMATION AND SAFETY INSTRUCTIONS In-depth familiarization with the content of this manual, assembly and operation of the air-handling unit in line with the instructions provided and obeying all safety regulations constitute the basis of efficient, safe and non- failure operation of the device. Works related to unloading packages with AHU subassemblies, transportation of the packages, AHU blocks and elements, connecting AHU-related systems as well as maintenance and repair are carried out by qualified specialists or they are supervised by authorized staff. -
Page 4: Transport And Storage
TRANSPORT AND STORAGE The VENTUS PRO can be delivered as fully assembled, assembled in sections or in packages, placed on closed palettes, containing elements to be assembled on-site by the Manufacturer Authorized Service. This manual does not contain instructions and guidelines on assembly of the unit. Delivery of AHUs elements, in the closed, properly marked and not broken palettes is going to belong to customer after signing of consignment note by client representative. -
Page 5: Foundation, Assembly, Connection Of Unit-Related Systems
FOUNDATION, ASSEMBLY, CONNECTION OF UNIT-RELATED SYSTEMS AHU SUPPLIED IN SECTIONS Sections connection is out of the standard offer of VTS. It is possible to purchase additional option to connect to the section by Authorized Service VTS. When the customer connect the section by himself should follow the separate instructions, supplied with AHU in the mounting set. -
Page 6: Conditions For Ahu Assembly Carried Out By Vts Authorized Service
If a unit operates with the low inlet temperature of the air, it is recommended to use the mixture of the glycol (up to 45%) as the heating medium. All installation pipes of the water heating, condensate drying, hydraulic valves should be well isolated. -
Page 7: Installation
• put into service a clean AHU labelled with provided pictograms and VTS labels, ready to be connected to a power source (wiring), utilities and control systems, • hand control elements over to the client’s representative if at his request they were not assembled in the AHU, •... - Page 8 The outlet condensate connections, led outside the AHU’s casing are assembled in the drain plates of coolers, counter–flow heat exchangers (the diameter of drain pan connection pipe is 32mm). To avoid damage drain pipe of the counter-flow heat exchanger section during transportation, they are not installed and attached separately in the package.
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Page 9: Connections
» TYPICAL AHU CONCRETE BASE Height of the foundation slab or base frame must allow for assembly of the u-trap which drains the condensate out of the draining tray. In case of the drain plates installed in the lower AHU sections, the unit has to be mounted onto additional foundation slab or a special hollow must be made directly under the u-trap. -
Page 10: Ducted Outle Connections
Appropriate operation of the flexible connection occurs if it is stretched to about 110 mm. The ducts connected to the AHU have to be suspended or underpinned with dedicated support elements. Conducting the ducts with the fittings should be done in a way to eliminate possible increase of noise level in the ventilation system. -
Page 11: Piping Connections
» RULES DUCTED OUTLET CONNECTIONS WITH DIRECTION CHANGE 3.6.2 PIPING CONNECTIONS Coils should be piped in counter flow arrangement to achieve required capacity. This arrangement requires that the entering heating or cooling fluid contacts the air leaving the coil. The diameter of the connection and the type of connection of the exchanger are available in the technical parameters sheet delivered with the device and at the customer's request. - Page 12 COIL CONNECTION RULES » Hydronic Steam • • » COIL INSTALLATION – HYDRONIC COILS » COIL INSTALLATION – STEAM COILS OIMM – VENTUS PRO...
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Page 13: Condensate Drain Lines
3.6.3 CONDENSATE DRAIN LINES Moisture condensed out of the airstream on cooling or dehumidifying coils should be drained out from the unit in order to sustain the proper use of the air handling unit and the ductwork system. Following precautions should be observed in piping of condensate drain lines. - Page 14 Electrical installation and wiring works should be carried out by qualified and competent electricians. In case of the humidifier, frequency converter, electric heater, EC motor applications their own installation and connection manuals should be used. For the other equipment the installation instructions and the wiring diagrams which stuck in the terminal box should be followed.
- Page 15 Before connecting the fan set one should check carefully the rated parameters of both power supply and the converter’s output. In fan sections equipped with more than one fan synchronous operation of fans should be ensured. The fan control system should be prepared in such a way so as to provide simultaneous start- up, rotary speed control and stoppage.
- Page 16 THERMAL OVERLOAD RELAY SETTING » Fans' motors with belt drive are powered by 3x400V/50Hz voltage. The connection should be done through the overload and short-circuit protection suitable for rated current of the motor. • direct-on-line starting: The thermal overload really should preferably be set to the motor full load current shown on the motor rating plate.
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Page 17: Setting Up Of Components
INTERMEDIATE FAN DRIVE – 2-SPEED AC MOTOR Dahlander pole changing motor – switch Pole chnager with two separate windings (2-speed) (2-speed) SETTING UP OF COMPONENTS 3.7.1 CONTROL SYSTEM Complete automatic control which should be an integral part of each air-conditioning system, enables continuous operation of a device, in many cases it is an indispensable element and lack of it may lead to serious operational problems or failures. -
Page 18: Air Filters
3.7.3 AIR FILTERS Panel filters and zigzag filters are normally fitted within the unit prior to shipping. Bag filters are normally shipped in closed carton boxes to avoid any collection of dust and loss of efficiency prior to commissioning. Each bag filter is housed within a special holding frame with necessary locking spring to ensure proper sealing. -
Page 19: Humidifiers
3.7.5 HUMIDIFIERS Mat type or steam type humidifiers may be assembled in the unit. For the piping and wiring instructions please refer to humidifier manufacturer’s manual. The supply water, overflow / drain piping should be done before the start-up of mat type. The supply piping should have a valve for cutting off during the maintenance. -
Page 20: Use Of The Unit
3.8.1 USE OF THE UNIT KLS air handling unit are used for heating, ventilating and air conditioning purposes. Any other use is considered not in conformity with general provisions. The manufacturer is not responsible for damages resulting; the user will be the only responsible. Air handling units can be used between -30˚C and +60˚C ambient temperatures. -
Page 21: Prevent Of Common Dangers And Risks
3.8.4 PREVENT OF COMMON DANGERS AND RISKS Air handling units are supplied with locked access doors as an option. So, unauthorized persons are not permitted to enter the sections which represent a danger. The most important potential dangers for life and health are described below. -
Page 22: The Hidden Danger
3.8.6 THE HIDDEN DANGER In addition to the dangers of rotation machinery, fans present another potential danger by virtue of their ability to draw in loose material. Solid objects passing through a fan represent potentially dangerous projectiles. Solid objects can cause fan failure by physically damaging the impeller blades. If the guard is removed for any reason, the fan must be disconnected and locked out. - Page 23 » OPERATIONS OF FANS • check that pulleys are secure on shafts, • check tightness of belts, • check that all moving parts of the fan and motor are free to rotate, • check that no loose materials are left near the fan inlet, •...
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Page 24: Maintenance
» AFTER TWO WEEK OPERATION After start up and initial satisfactory operation of two weeks, it is recommended to have the following checks: • belt drive alignment and belt tension, • motor running current, • bearing temperature immediately after stop. Bearing temperature should not exceed 70 C, •... -
Page 25: Fan Sections
MAINTENANCE ONCE A WEEK Check the conditions of filters every week. Clean, wash or replace if necessary. ONCE A MONTH Check belt drive alignment and tension, adjust if necessary. Check the condition of float and valve in humidifier. Check the condition of drain for free flow. Check the condition of access door hinges and seals lubricate hinges if necessary. -
Page 26: Coil Sections
3.10.2 COIL SECTIONS Coils should be cleaned to remove any accumulation of dust between the fins and tubes should be checked for any leakage. Cleaning process can be done in 3 ways: • vacuum, • compressed air, • water or steam spray (opposite to the air flow direction). During the application the water / steam / air pressure should not exceed 5 Bar. -
Page 27: Humidifier Sections
PREVENT OF COMMON DANGERS AND RISKS INITIAL PRESSURE RECOMMENDED MAXIMUM FILTER GRADE FILTER GRADE DIFFERENTIAL PRESSURE DIFFERENTIAL 25 Pa 150 Pa (65% ≤ Am ≤ 80%) Panel Filter 40 Pa 150 Pa (80% ≤ Am ≤ 90%) 50 Pa 150 Pa (90% ≤... -
Page 28: Belt Tension And Alignment Control
3.10.6 BELT TENSION AND ALIGNMENT CONTROL BELT TENSION AND ALIGNMENT CONTROL • A simple “Rule of thumb” for checking belt tension is illustrated at right. • When the belt is grasped as shown, a total deflection of approximately 25mm (1”) should be easily attained. •... -
Page 29: Lubrication Of Bearings
3.10.8 LUBRICATION OF BEARINGS Bearings have to be controlled and cleaned regularly; have to be lubricated adequately to prevent direct metallic contact between rolling elements, to prevent wear and to project bearing surfaces against corrosion. The fans with low shaft power are equipped with bearings in a rubber housing which absorbs a part of vibration. When you change the bearing it is very important to change the rubber housing too. - Page 30 Temperature correction factors kT (for lithium soap grease) Temperature of bearings (ºC ) Temperature 0.35 0.12 0.07 0.04 correction factor, kT Surround factor kS considers in particular the external influences such as humidity, shocks and vibrations GREASE STRESS SURROUNDING FACTOR, kS Medium High 3.10.8.1...
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Page 31: Troubleshooting
3.10.8.3 RENEWING THE GREASE FILL When the end of the relubrication interval t, has been reached, the used grease in the bearing should be completely removed and replaced by fresh grease. As stated before, under normal conditions, the free space in the bearing should be completely filled and the free space in the housing filled to between 30 and 50 % with fresh grease. - Page 32 TROUBLESHOOTING POSSIBLE CAUSE PROBLEM SYMPTOMS OTHER CAUSES OR ACTION Impeller hits inlet ring Damaged impeller Correct or change impeller NOISE Damaged inlet ring Correct or change inlet ring Impeller not centered on shaft Center the impeller Shaft loose in bearing Tighten shaft Impeller loose on shaft Tighten impeller...
- Page 33 TROUBLESHOOTING (cont.) POSSIBLE CAUSE PROBLEM SYMPTOMS OTHER CAUSES OR ACTION Current is not reaching Electric power failure Locate fault and restore power NO AIR FLOW motor Faulty wiring motor. Loose Motor is not Starter overload tripped terminals. running Control panel fault Locate and correct fault.
- Page 34 TROUBLESHOOTING (cont.) POSSIBLE CAUSE PROBLEM SYMPTOMS OTHER CAUSES OR ACTION Cooling fluid Refrigeration plant capacity is COOLING COIL temperature is high insufficient. Circulating pump or No cooling Refrigeration plant cycles on- off compressor fault. Excessive heat gain in piping system. Insufficient coolant Valves are partially closed or Circulating pump or compressor...
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