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Denco CAIRplus Operation Manual

Modular air handling units
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OPERATION MANUAL
Modular Air Handling Units
CAIRplus
®
Solutions with Maximum Flexibility

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Summary of Contents for Denco CAIRplus

  • Page 1 OPERATION MANUAL Modular Air Handling Units CAIRplus ® Solutions with Maximum Flexibility...

  • Page 2: Table Of Contents

    Table of Contents CAIRplus Table of Contents Unit Type Code .................. 4 Safety and User Instructions ............5 Availability of the operation manual ..............5 Scope of the operation manual ............... 5 Symbols used ....................5 Labelling of safety instructions ................ 8 Used safety symbols ..................
  • Page 3 Dismantling ....................83 Disposal ......................83 Troubleshooting ................84 Appendix ..................85 11.1 Maintenance Log Book CAIRplus ..............85 – Original operation manual – Copyright note Disclosing, copying, distributing or taking any action in reliance on the contents of this document is strictly prohibited without express prior consent.

  • Page 4: Unit Type Code

    Unit Type Code CAIRplus Unit Type Code Unit part 2 * Example: CAIR plus Prefix General Unit part 1 CAIR plus (air handling unit) SX Unit Standard without accessories Standard with accessories Special design Automatic Complete Without Standard Standard, in conformity with RLT 01 Directive...

  • Page 5: Safety And User Instructions

    CAIRplus Safety and User Instructions Safety and User Instructions The CAIR units are constructed using the state-of-the-art technology and according to recognized safety regulations. Operation is only allowed if the unit is in perfect working order given that current operation manual and safety instructions are observed and...
  • Page 6 Safety and User Instructions CAIRplus 2.3.1 Special warning and danger symbols The following warning and instruction signs can be secured on the unit: To connect - counter hold with a pipe wrench. Attention: fire risk. Dust-laden filters are inflammable. Before opening, use the main isolator to disconnect power.
  • Page 7 CAIRplus Safety and User Instructions 2.3.2 Function signs Air heater/cooler with heat recov- Fan or compressor indicating ery function air flow direction Air/water ECOFLOW Air heater/cooler with heat recov- Sound attenuator in unit ery function Air/steam ECOSTAT General air filter...

  • Page 8: Labelling Of Safety Instructions

    Safety and User Instructions CAIRplus Labelling of safety instructions To designate the safety instructions the following symbols and notices are provided in appropriate places throughout this document: 2.4.1 DANGER - Death/serious irreversible injury Indicates an extremely hazardous situation which will result in death or serious irre- versible injury, if the safety instruction is not followed.

  • Page 9: Used Safety Symbols

    CAIRplus Safety and User Instructions 2.4.4 ATTENTION – Environmental or material damage ATTENTION Indicates actions that can result in equipment or property-damage only accidents. Examples: ATTENTION Risk of environmental damage! Heavily contaminated filters can have a negative impact on production processes.

  • Page 10: Safety-Conscious Work Procedures

    Safety and User Instructions CAIRplus Scalding Hot surfaces Cooling Environmental damage Damage to the unit Safety-conscious work procedures Observe the following instructions when carrying out installation, adjustment or repair jobs: • Wear suitable protective clothing during work, such as protective footwear, gloves, safety goggles, etc..
  • Page 11 CAIRplus Safety and User Instructions For all kinds of work: Risk of personal injury! No matter what kind of jobs are performed on the unit, there is always a risk of cuts by thin sheet metal and heat exchanger fins. In particular, this aspect applies when carrying out maintenance and cleaning work on the surfaces of heating and cooling coils.

  • Page 12: Proper Use

    – Remove contact lenses if you have any. – Rinse your eyes with lots of water. Proper use The CAIRplus units are only intended for handling air and performing the following jobs: – filtering normally polluted air – filtering air in cleanroom applications (special cleanroom design) –...

  • Page 13: Safety Devices

    CAIRplus Safety and User Instructions Proper use also includes observance of the operation manual and instructions from the manufacturer of the individual components, as well as the inspection and maintenance intervals stipulated by DencoHappel. Improper use Any use other than that described above is considered improper. If necessary, check if your units are suitable for your intended purpose and application.

  • Page 14: Selection And Qualification Of Personnel

    Safety and User Instructions CAIRplus 2.12 Selection and qualification of personnel Ensure that every person working on the unit has read and understood entire operation manual. Please read this document fully before commencing any work, and not while performing a task.

  • Page 15: Technical Description

    The aim is to meet the customer specifications concerning required air vol- ume and conditions. CAIRplus units are used at a central point for comfort air conditioning on commercial and industrial premises for the transportation and treatment of “normal” air. The units can also be manufactured in a customized design and adapted for cleanroom and hygiene applications.
  • Page 16 The following diagrams illustrate condensation limits depending on temperature and relative humidity at the installation site - for series CAIRplus SX M and CAIRplus SX K. The diagrams are based on normal air values and are calculated using a model box.
  • Page 17 Air temperature on unit external side in °C With ambient conditions of 27 °C and 60 % relative humidity, air temperature in unit may amount to -1 °C without formation of condensate. CAIRplus SX K Condensation diagram for kb-value: 0.5 = without thermal separation Relative humidity on unit external side in % Air temperature on unit external side in °C...
  • Page 18 Technical Description CAIRplus Relative humidity on unit external side in % Air temperature on unit external side in °C PR-2009-0096-GB • Subject to modifications • R8-10/2015...

  • Page 19: Shipping And Storage

    Shipping and Storage Shipping and Storage Delivery CAIRplus unit can ship as a single piece or multiple individual shipment units. Delivery is done on transport pallets. • When the unit is delivered, check that the shipment is correct according to the dispatch note, and also check for completeness.
  • Page 20 Shipping and Storage CAIRplus • For safety reasons, wear protective clothing when lifting or transporting the unit. • Before lifting or shipping the unit, make sure that all doors, dampers and panels are fixed and secured. • Only use lifting gear with sufficient load-bearing capacity.
  • Page 21 CAIRplus Shipping and Storage 4.2.2 Lifting the unit - transport gear on the base frame (provided with shipment units weighing up to 4000 kg) • Use only the transport gear attached to the base frame for lifting the units. •...

  • Page 22: Storage

    Shipping and Storage CAIRplus Storage Notice! • Observe the permissible storage conditions when storing the unit. Remove the original packaging only before installation. • If the unit is stored for a period of time before installation or commissioning, protect it from damage through elements, build-up of dust and dirt! •...

  • Page 23: Assembly

    CAIRplus Assembly Assembly Notice! Here you will find information on how to mount and install the unit. – Assemble and install exclusively by qualified staff. They must have proper pro- fessional training and experience in the relevant accident prevention regulations, as well as other generally recognized safety and occupational health codes, per- form unit jobs.
  • Page 24 Assembly CAIRplus – In units where a condensate drain is installed, ensure there is adequate height for condensate drain requirements - the height of the site base must at least correspond to the trap height (refer to "Condensate tray trapping").
  • Page 25 CAIRplus Assembly 5.1.3 Foundation requirements for indoor installation • The foundation/bottom base may protrude a maximum of 20 mm beyond the outer edge of the unit to enable mounting of cover plates or accessories, such as condensate traps. • The supporting points of the foundation must be located at every shipping split.
  • Page 26 Assembly CAIRplus 5.1.4 Foundation requirements for outdoor installation (weatherproof, roof frame) Notice! Units for outdoor installation are not roof substitutes! It is not allowed to use weatherproof units as supporting surfaces of a building or similar roof substitutes in accordance with prEN 13053 and VDI 3803.

  • Page 27: Assembling The Unit

    CAIRplus Assembly 5.1.5 Structure-borne noise attenuation In order to reduce the transmission of vibration from the unit to the supporting structure, provide vibration and noise-dampening pads. – We recommend to use rubber pads to isolate the foundation from the units installed on a level structure with no special requirements to structure-borne noise isolation.
  • Page 28 Assembly CAIRplus Required tools: – Electric screwdriver, drill – Bit holders/sockets – Sockets of sizes 8, 10 – Slotted head screw bits, sizes 2, 3 – Open-ended spanners sizes 8, 13, 17 – Screw drivers 4.5 - 6.5 – Hexagon socket size 6 –...
  • Page 29 CAIRplus Assembly • Disassemble the lifting lug secured on the base frame. Fig. 5-11: Lifting lug secured on the base frame Notice! • You may not use lifting lugsfor suspending the unit from the top on a permanent basis. •...
  • Page 30 Assembly CAIRplus ATTENTION Risk of damage to the unit! • Do not attach tensioning belts/hoisting devices to heat exchanger connections, condensate drains and door handles. Do not use the components to pull or push the equipment! • Before joining the sections for final assembly position them as close to one another as possible.
  • Page 31 CAIRplus Assembly • Install the seam cap. Fig. 5-17: External view • If the rear side of the unit is not accessible, screw together the interior joint connection in the corner. • Do not use partition joint connectors to pull the units together.
  • Page 32 Assembly CAIRplus Additional measure for double-deck and side-by-side units • Connect both unit sections using supplied plates. Fig. 5-21: Connecting unit sections • For offset double-deck units, use the screws as outlined. Fig. 5-22: Double-deck units • For offset side-by-side units, use the screws as outlined.
  • Page 33 CAIRplus Assembly 5.2.3 Additional measures for units for outdoor installation ATTENTION Risk of damage to the unit! Insufficient or improper sealing by others on site can cause water leakage and damage to the equipment and building materials! • Carefully seal all unit components.
  • Page 34 Assembly CAIRplus 5.2.5 Installing inclined/bossed roof (CAIRplus SX) • Secure the separately supplied joint strip. Fig. 5-26: Installing joint strip Single units 064.xxx to 160.xxx and side-by-side units 064.xxx to 096.xxx • Use the supplied sealant to caulk the roof panel seams (1).
  • Page 35 CAIRplus Assembly Single unit 188.xxx to 252.xxx with inclined roof design • Secure the separately supplied joint strip as described above. • Slide the separately provided joint strips (1) from both sides. • Use a screwdriver to ensure that the connecting plate is placed below the opposite joint strip.
  • Page 36 Assembly CAIRplus Single units 280.xxx to 312.xxx and side-by-side units 128.xxx to 160.xxx • Secure the separately supplied joint strip as described on page 34. • Use the supplied sealant to caulk the roof panel seams (1). • Slide the separately provided joint strips (2) from both sides.
  • Page 37 CAIRplus Assembly Centrally-split roof panels • With centrally-split roof panels slide the separately provided roof joint strips (1) over the flanges. • Secure in place a terminating angle plate (2) on each front wall. • Apply sealant (3) as presented in the figure.
  • Page 38 Assembly CAIRplus 5.2.6 Roof installation with double-deck units • Roof installation for double-deck units is identical to the in- stallation of single units – refer to the specification from page 33. • Apply sealant evenly on the surface. • Use the screws to attach the connecting panel to the end wall (1).
  • Page 39 CAIRplus Assembly 5.2.7 Roof installation of side-by-side unit with ECOROT • Roof installation side-by-side units equipped with ECOROT is identical to the installation of single units – refer to the specification from page 33. • Apply sealant evenly on the surface.
  • Page 40 Assembly CAIRplus 5.2.8 Intermediate or base frame cover panels • Mount the cover panels as outlined Fig. 5-34 • Mount the cover panels as outlined Fig. 5-35 • Mount the cover panels as outlined Fig. 5-36 PR-2009-0096-GB • Subject to modifications • R8-10/2015...

  • Page 41: Installation

    CAIRplus Installation Installation Danger of injury due to toxic substances! Glycols and other antifreeze agents are harmful for humans and animals, if swal- lowed. • Consult a doctor immediately if swallowed by mistake. Notice! Unit connections at coils and humidifiers shall only be performed by qualified licensed staff.

  • Page 42: Installing Air-Handling Components With Coil Connections

    Installation CAIRplus Installing air-handling components with coil connections Recommendations on water quality for heat exchangers operating with pumped warm water and pumped chilled water: Water in proper quality, e.g. salt and lime-free drinking water, considerably increases the service life and efficiency of the heat exchanger.
  • Page 43 CAIRplus Installation For units with outside-air or mixed-air operation consider the following: ATTENTION Risk of damage to the unit! • Protect the heat exchanger in unit from ice and freezing at ambient temperatures below the freezing point. • Use proper antifreeze agents in the water circuit.
  • Page 44 Installation CAIRplus 6.3.4 Installing humidifier Refer to the supplied documentation for instructions on assembly and installation. • Also observe the German Drinking Water Act (Trinkwasserverordnung – TWVo). The following recommendation applies “Guide values for the quality of water circulating in the spray humidifier (air washer)” (in accordance with: VDI 3803 “HVAC systems.
  • Page 45 CAIRplus Installation 6.3.5 Water drain trapping Types of condensate drains Condensate drain by unit profile Fig. 6-1 Condensate drain by unit profile Fig. 6-2: Tray drainage adapter 22/40 mm Condensate drain through base frame Fig. 6-3 Notice! Direct connection to a sewage network is not allowed! Fill the condensate trap with water prior to commissioning and after extensive downtime periods.
  • Page 46 Installation CAIRplus • Connect the trap to the sewage water system as shown in the figure. Caution: freeze-up risk! In the event of freeze-up risk, the drain pipe must be insulated and kept warm using heating wire. Fig. 6-5: Trapping for section under negative pressure Fig.
  • Page 47 CAIRplus Installation Injuries caused by smoking and open flames Smoking and open flames at the installation site of the unit or during work with refrigerants are prohibited. Open fire or flames can lead to the disintegration of a refrigerant and release of toxic gases.

  • Page 48: Installing Accessories

    Installation CAIRplus Prerequisites for commissioning All structural building prerequisites such as accessibility, installation of self-contained units and ducts, and the sustained availability of all supply media must be satisfied. Furthermore, it must be possible to operate the equipment in the required operating points.

  • Page 49: Electrical Connection

    CAIRplus Electrical Connection Electrical Connection Notice! The electrical connection may only be performed by a qualified licensed electri- cian. The electricial must have proper professional training and experience in the relevant accident prevention regulations, as well as other generally recognized safety and occupational health codes, perform unit jobs.

  • Page 50: Connecting Unit

    Electrical Connection CAIRplus 7.1.1 On-site routing of cables and cable penetrations by others • Avoid cable penetrations and routing of cables near doors, dampers, panel connections and cover strips. • Perform all screw connections and cable openings leak-free. • The connecting cables in the fan chamber must be long enough to allow the motor to be moved easily (e.g.
  • Page 51 CAIRplus Electrical Connection Motor full protection electronics For motor full protection, we recommend to use 912.MVS 1.0 tripping units. These are specially designed for PTC thermistors of motors. Full motor protection is based on the closed-circuit principle and is intrinsically safe. Motor protection tripping units 12.MVS 1.0 generally enable isolated disconnection and a restart following a power outage.
  • Page 52 Electrical Connection CAIRplus 7.2.2 Connecting electric motors For proper unit operation consider the clockwise rotating field for unit connection. • If necessary, check the rotating field using an instrument specifically designed for this purpose. ATTENTION Risk of damage to the unit! Improper connection to the motor/fan could result in equipment damage.
  • Page 53 CAIRplus Electrical Connection 7.2.3 Frequency inverter Make the parameter settings in the course of unit start-up. ATTENTION Risk of damage to the unit! • Do not activate the parameter "overmodulation" as this can damage the impeller. • Permanent magnet motors (PM motor) without integrated electronics may only be connected to suitable frequency inverters.
  • Page 54 Electrical Connection CAIRplus                                     ...

  • Page 55: Commissioning And Maintenance

    CAIRplus Commissioning and Maintenance Commissioning and Maintenance Notice! Data sheet and assembly instructions are located inside the unit, refer to the labelled positions for the documentation! Remove these documents prior to the unit commissioning. Certain assembly groups and unit components require individual commissioning. The relevant instructions are listed in the following chapter.

  • Page 56: Routine Cleaning And Maintenance

    Commissioning and Maintenance CAIRplus ATTENTION Risk of damage to the unit! • When entering CAIR units, ensure that no loads are applied on the floor panels. • For all installation work, take appropriate measures to ensure that the load is evenly distributed across the bottom profiles.
  • Page 57 CAIRplus Commissioning and Maintenance 8.1.1 Basic information about cleaning heat exchangers Injuries caused by sharp edges! Observe precaution when cleaning due to risk of cuts on thin and sharp edges. • Wear chemical resistant gloves. ATTENTION Risk of damage to the unit! •...

  • Page 58: Maintenance Frequency Checklist

    Commissioning and Maintenance CAIRplus Maintenance frequency checklist Observe maintenance frequency specified in the European guidelines and standards (e.g. VDI 6022). ELECTRICAL HAZARD AND DANGER OF ROTATING UNIT PARTS WITH SHARP EDGES! • OBSERVE PERSONAL PROTECTION MEASURES • Please consider the safety instructions on page 5 and page 55ff when...
  • Page 59 CAIRplus Commissioning and Maintenance Unit part Frequen- Action ✓ (months) • Every 3 Check filters for debris, damage and odour. Routines for months all filters • Clean filter chamber. (see page 69et • seq.) Every 6 Check if the maximum allowed pressure difference (refer to RLT 01 guideline -...
  • Page 60 Commissioning and Maintenance CAIRplus Unit part Frequen- Action ✓ (months) • Every 12 Check for leak-free condition and possible dirt on the air side. Cooler with- months out or with • To ensure frost protection, periodically check the safety devices and take proper droplet sepa- precautions such as draining the equipment or adding antifreeze agents.

  • Page 61: General Considerations

    CAIRplus Commissioning and Maintenance Unit part Frequen- Action ✓ (months) • Damper Every 6 Use a vacuum cleaner to blow off damper blades, never add grease! blades and months • Detach the actuator from dampers, check if dampers are moving freely.
  • Page 62 Commissioning and Maintenance CAIRplus 8.3.2 Maintenance of units for indoor installation • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! Notice! • Carry out additional cleaning in case of aggressive or oil-containing air.

  • Page 63: Fan Assembly And Drives

    CAIRplus Commissioning and Maintenance Fan assembly and drives ELECTRICAL HAZARD AND DANGER OF ROTATING UNIT PARTS WITH SHARP EDGES! • OBSERVE PERSONAL PROTECTION MEASURES • Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! 8.4.1 Commissioning of belt-driven fan assembly...
  • Page 64 Commissioning and Maintenance CAIRplus Carry out the following maintenance and inspection steps: • Check fan for secure mounting. • Check fans for dirt, damage and corrosion. • Check anti-vibration isolators for proper operation • Check belt protection grille for proper operation, clean if necessary.
  • Page 65 CAIRplus Commissioning and Maintenance Center lines Fig. 8-2: Pulley alignment and fan belt tensioning Adjusting or removing fan belt pulley • Slacken fan belt, see “Re-tensioning or replacing V-belt” on page 64, and: • remove the belt. • Loosen and remove both hexagon-socket screws (2).
  • Page 66 Commissioning and Maintenance CAIRplus • Consider the maximum tightening torque of hexagon-socket screws during the installation: Bush No. 1008 1108 1210 1610 1615 2012 2517 3020 3030 3525 3535 Max. tightening torque (Nm) Tab. 8-1: Maximum tightening torque • Check electric motors for dirt, damage, corrosion and secure mounting.
  • Page 67 CAIRplus Commissioning and Maintenance 8.4.3 Commissioning of direct-driven fan assembly • DANGER! Please consider the safety instructions on page 5 and page 56 when performing all the described activities! • Remove remaining installation debris and foreign matter from the impeller and air intake zone.

  • Page 68: Filter Assembly

    Commissioning and Maintenance CAIRplus 8.4.5 Commissioning and Maintenance of EC fans Hazardous voltage can result in death! Waiting time at least 3 minutes! Due to the use of condensers, danger of death continues even after switching off the unit by directly touching live components which are still live owing to fault states.
  • Page 69 CAIRplus Commissioning and Maintenance 8.5.2 Routine maintenance for all filters • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! Danger of inflammable materials! There is a risk of inflammable filter material that could cause fire.
  • Page 70 Commissioning and Maintenance CAIRplus • Replacing filter medium Ensure that unit is deactivated. Open the access door/maintenance panel. • Release the top and bottom spring clips on the filter rack or open the quick-release filter frame. • Pull out the filter frame.

  • Page 71: Heater Assembly

    CAIRplus Commissioning and Maintenance 8.5.7 Maintenance of other filters • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! Refer to the relevant maintenance instructions specified in the supplied documenta- tion.
  • Page 72 Commissioning and Maintenance CAIRplus 8.6.3 Commissioning of steam heater assembly • DANGER! Please consider the safety instructions on page 5 and page 56ff when performing all the described activities! Danger of injury from scalding! Hot steam escapes if an air vent is open! Consider scalding hazard.

  • Page 73: Cooler Assembly

    CAIRplus Commissioning and Maintenance Cooler assembly ELECTRICAL HAZARD AND DANGER OF ROTATING UNIT PARTS WITH SHARP EDGES! • OBSERVE PERSONAL PROTECTION MEASURES • Please consider the safety instructions on page 5 and page 55ff when performing all the described activities!

  • Page 74: Cooling/Heating Coil

    Commissioning and Maintenance CAIRplus Procedures before winterization • Drain water from the cooling coil before winter. As the coil piping diameter is small, residual water can remain in the unit following normal evacuation. For safety reasons, use compressed air to blow through the system in order to remove all remaining water.

  • Page 75: Heat Pipe

    CAIRplus Commissioning and Maintenance Complete the following commissioning steps: • For connection jobs ensure that nitrogen charge is present in coils. • Check supply and return lines for proper connection. • Check shut-off devices and other fixtures for proper installation, counterflow mechanism for medium inlet on the air-discharge side.

  • Page 76: Liquid-Coupled Energy Recovery Coil

    Commissioning and Maintenance CAIRplus Upright or horizontal with For commissioning see „Commissioning of dampers and shut-off dampers“ on bypass damper control page 79. 8.9.2 Maintenance of heat pipe • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing...
  • Page 77 CAIRplus Commissioning and Maintenance ATTENTION Risk of damage to the unit! • Avoid inadmissible high differential pressures between supply air and extract air. This could cause damage to the fins. In this case, DencoHappel neither accepts warranty claims nor assumes liability.

  • Page 78: Rotary Heat Exchanger

    Commissioning and Maintenance CAIRplus 8.12 Rotary heat exchanger Electrical hazard and danger of rotating unit parts with sharp edges and ro- tating storage mass! • OBSERVE PERSONAL PROTECTION MEASURES • Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! 8.12.1 Commissioning of rotary heat exchanger...

  • Page 79: Humidifier Assembly

    CAIRplus Commissioning and Maintenance 8.13 Humidifier assembly For steam humidifiers: Electrical hazard and danger of rotating unit parts with sharp edges! • OBSERVE PERSONAL PROTECTION MEASURES • Please consider the safety instructions on page 5 and page 55ff when performing all the described activities!

  • Page 80: Sound Attenuators

    Commissioning and Maintenance CAIRplus 8.14.2 Maintenance of dampers blades and shut-off dampers • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! Carry out the following maintenance steps: • Vacuum clean dampers (blow out), never apply grease! •...
  • Page 81 CAIRplus Commissioning and Maintenance Warning of high concentration of refrigerants in the air! High concentration of refrigerants in the air may have an anaesthetic effect and cause unconsciousness. Prolonged exposure may cause irregular heartbeat and sudden death. Very high concentration of refrigerant may cause suffocation by reduced oxygen content in the surrounding air.
  • Page 82 Commissioning and Maintenance CAIRplus 8.17.1 Recurrent tests • DANGER! Please consider the safety instructions on page 5 and page 55ff when performing all the described activities! The system and its system components are subject to partially recurring tests con- ducted by a qualified person or an approved inspection agency according to Art.15 of the German Law on Occupational Safety (BetrSichV).

  • Page 83: Disassembly And Disposal

    CAIRplus Disassembly and disposal Disassembly and disposal ATTENTION Risk of environmental damage! Have qualified licensed staff dismantle and dispose of the unit! Dismantling To dismantle the unit proceed as follows: Electrocution through hazardous voltage will lead to death or serious injury.

  • Page 84: Troubleshooting

    Troubleshooting CAIRplus 10 Troubleshooting Notice! Have qualified licensed staff perform troubleshooting and repair procedures. Qualified licensed staff or other individuals with proper professional training must be experienced in the relevant accident prevention regulations, as well as other generally recognized safety and occupational health codes.

  • Page 85: Appendix

    CAIRplus Appendix 11 Appendix 11.1 Maintenance Log Book CAIRplus Notice! Observe maintenance procedures for air handling units as these are critical for unit service life. Due to use of various chemical substances and cleaning agents for sanitizing and cleaning, unit surfaces may be affected.
  • Page 86 Appendix CAIRplus Date Signature: Maintenance Unit part Comment frequency Heat Exchanger Fan assembly Refrigeration plant Control Month 6 following com- Panels missioning Filters Condensate pan Damper blades Other components Defects/damage was directly communicated to company: on (date): Defect/damage was repaired by:...
  • Page 87 CAIRplus Appendix Date Signature: Maintenance Unit part Comment frequency Heat Exchanger Fan assembly Refrigeration plant Control Month 18 following Panels commissioning Filters Condensate pan Damper blades Other components Defects/damage was directly communicated to company: on (date): Defect/damage was repaired by:...
  • Page 88 DencoHappel is a global company with expertise in air treatment, air conditioning and air filtration. Our nearest sales and service teams will be glad to discuss ideas and develop creative and effective solutions with you. www.dencohappel.com...

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