EQGA AND EQGB HYGIENIC VERSION, CODE SUFFIX I = 3 AND 4

Transcription

1 EQGA AND EQGB HYGIENIC VERSION, CODE SUFFIX I = 3 AND 4 ASSEMBLY AND MAINTENANCE INSTRUCTIONS Contents Page Hygienic version Delivery Safety precautions Mounting on the floor Suspending from the ceiling To install the drainage water trough To clean the casing To clean the finned-tube coils To clean the fan To clean the rotary heat exchanger To clean the plate heat exchanger To disinfect the air handling unit

2 2 Assembly and maintenance instructions HYGIENIC VERSION Recommendations for the selection of functions that meet requirements on hygiene, among others VDI 6022, are presented in the ACON product selection program for sizing and configuring a hygienic air handling unit. Internal docking Window for easy inspection Hygienically approved non-metallic components Thermal insulation to class T3 Condensation insulation to class TB3 Stainless or pre-painted casing Casing to leakage class L2 F7 bag filters, HEPA or Carbon filters Integrated or fully sealed fan beams without sharp edges Components which are simple to clean, for example coils, rotary heat exchangers and plate heat exchangers Large inspection spaces Provision for coil with withdrawable drip tray Floor without grooves and block joints DELIVERY The hygienic air handling unit is delivered in accordance with one of the following alternatives: As one delivery unit, i.e. one factory-assembled block unit. As one delivery unit, i.e. one factory-assembled unit mounted on a base frame. Several block units, which must be connected to form one unit on site. SAFETY PRECAUTIONS Lifting and transport of air handling units, mounting them on a base frame and fitting them with support feet, the docking of blocks, safety precautions and inspection prior to commissioning are specified in the General instructions, Safety Precautions, 8658 GB.

3 Assembly and maintenance instructions 3 MOUNTING ON THE FLOOR The floor on which the unit is placed must be flat, to ensure problem-free operation. Check the floor carefully to avoid distortion of the unit and thus ensure that the doors will not be difficult to open and close. EQAZ-05 adjustable feet are available to allow for individual height adjustment of the EQAZ-04 base frame. Place the support washer (supplied) under the foot as shown in Figure 8. It is important to make sure that the unit is level. If the air handling unit includes unit sections that are provided with drains, space must be available for a water trap (such as the EQAZ-08) as shown in Fig. 9. Adjustment of the lateral and longitudinal position of the air handling unit is best carried out by means of a roller crowbar or the like, as shown in Figures 10 and 11. Fig. 9 Block unit without base frame Free space for water trap = min. 150 mm N.B! The air handling unit should slope 2 % towards the inspection side to allow for drainage during cleaning. Flushing water can be collected in EQWZ-02 drainage water trough (accessory). Fig. 10 EQWZ-02 2% Block unit on EQAZ-04 base frame Fig. 7 MOUNTING ON ADJUSTABLE FEET Mount the feet spacing them evenly along the side beams if more than 4 feet are to be fitted. If 4 feet are used, fit one foot at each end of the side beams. To adjust the adjusting screw: 1) Back off the locking nut (A). 2) Adjust the height with set screw (B). 3) Lock the locking nut (A). Fig mm gap in the end of the base frame Fig. 8

4 4 Assembly and maintenance instructions SUSPENSION FROM THE CEILING Place the unit on a stand made on site as shown in the examples below. Suspend the unit from hangers. The larger units must be fitted with EQAZ-29 floor grating so that service personnel can enter the air handling unit. The stand must also be constructed so that the bottom panels are supported by either traversing or longitudinal support beams. Hanger Important! The position of the hangers can be easily adjusted with the stand according to the figure. A Hanger min. 800 Retaining flange A max. 35 mm along the inspection side on unit sizes Cut and remove the edge of the flange A at the hinge locations on unit sizes Retaining flange A max. 75 mm along the inspection side on unit sizes HEAVY-DUTY INSTALLATION Suitable installation for unit sizes Example 1 Hanger Clamp max. 1,5 m HEAVY-DUTY INSTALLATION Suitable installation for unit sizes Example 2 N.B! If the unit is fitted with a EQWZ-02 water drainage trough, the edge of the flange (A) should only be by the corner frame members of the casing. View A View A View B 2% View B 2% N.B! The tensile strength verification must be issued by an authorized HVAC installation engineer.

5 Assembly and maintenance instructions 5 TO INSTALL THE DRAINAGE WATER TROUGH, EQWZ-02 The drain water trough is supplied as a loose part and should be fitted after the air handling unit has been docked. Place the drain water trough onto the mounting angle bracket and fasten it with the screws supplied (see illustration). 2. Clean the coil with a high-pressure cleaner. If the coil is deeper than six tubes, a THD Power Clean is needed to ensure a full cleanability. 3. Point the nozzle at a 45-degree angle to have a free passage for the water jet through the coil. Make sure that the water penetrates the coil. 4. Remove all dirt. 5. Dry all surrounding parts in the unit. TO CLEAN THE CASING Carry out the following before cleaning the interior of the casing: Remove the filters Remove the withdrawable filter frame Remove the withdrawable sound attenuating baffles Remove the withdrawable droplet separators Remove anti-skid devices, if fitted Remove withdrawable drip trays CLEANING 1. Vacuum-clean surfaces to remove loose dust. 2. Apply suitable dirt and degreasing agent such as cold degreasing agent on interior surfaces. 3. Flush the surfaces clean with clean water after a few minutes. N.B! Do not use a high-pressure spray gun. The flushing water is collected in the drain water trough which can be connected to a drain or a collection vessel. CLEANABLE COILS FOR HYGIENE APPLICATIONS All coils with hygiene fins are fully cleanable according to the standards VDI3803 and VDI6022. This means that the coil can be cleaned with a high-pressure water system right through the core. The cleaning nozzle used for coils with a fin pitch of mm and deeper than six tubes is THD Power Clean manufactured by TECHNISCHER HYGIENE DIENST GMBH ( info@thd.info, web: If the coil is six tubes deep or less, an ordinary nozzle can be used. 1. Make sure that no sensitive equipment, either inside or outside the unit, can be harmed by the water. Be extra careful not to damage the filter. If the unit has an empty section (EQTC), use the special drip plate to protect the rest of the unit. CLEANING THE FAN 1. Open the inspection panel if the centrifugal fan section has one. 2. Vacuum-clean the fan to remove dry dust. 3. Apply suitable dirt and degreasing agent such as cold degreasing agent on the fan blades, motor (degree of protection IP54) and other surfaces. 4. Flush with clean water after a few minutes. N.B! Do not use a high-pressure spray gun. 5. If the fan casing is equipped with a means for drainage, the water will run out on the floor of the unit casing and be collected in the drainage water trough. Otherwise, wipe the interior of the fan casing dry with a cloth. TO CLEAN THE FANS 1. Vacuum-clean the surface of the rotor to remove dry dust. 2. Apply suitable dirt and degreasing agent such as cold degreasing agent onto the rotor surface and other surfaces. 3. Flush after a few minutes with a high-pressure spray gun. Aim the jet of water at right angles towards the rotor structure. The spray nozzle should appropriately be held approx. 50 mm away from the face surface of the rotor. Suitable pressure: up to 80 bar. 4. Vacuum-clean to remove water or blow surfaces clean with compressed air. Important! Do not use methyl ethyl ketone, aceton or corrosive liquids.

6 6 Assembly and maintenance instructions TO CLEAN THE PLATE HEAT EXCHANGER 1. Vacuum-clean the surface of the rotor to remove dry dust. 2. Apply suitable dirt and degreasing agent such as cold degreasing agent onto the heat exchanger surfaces. 3. Flush after a few minutes with a high-pressure spray gun. The spray nozzle should be held 3-5 cm from the face surface. Suitable pressure: up to 80 bar. EQRZ-01 flushing water tray is an accessory for collecting flushing water on the supply air side. 4. Vacuum-clean to remove water or blow surfaces clean with compressed air. 5. Clean the flushing water tray and drip tray. 6. Clean the droplet separator, if fitted. DISINFECTION If disinfection is required, for example, in hospital environments, after finishing the cleaning procedure described the above, the surfaces can be treated e.g. with any of the following agents: 5 % chlorinated solution 6 % hydrogen dioxide solution Hydrogen dioxide mist % isopropyl alcohol Hydrogen peroxide Apply the cleaning agent on all the surfaces inside the air handling unit. Warning! If a nozzle of a size delivering 2 litres/min at 7 bar is used, the supply pressure to the spray gun must not exceed 25 bar since the nozzle is inclined at an angle of 20 º to the face surface, and if the pressure is higher, the face surface may be deformed. Warning! Wear protective gloves and protective face mask. See the protection and safety instructions for the relevant cleaning agent. Supply air at the bottom Extract air Supply air The droplet separator, if fitted, can be removed by lifting and folding it. Drip tray for collecting condensate and flushing water Flushing water tray EQRZ-01 Supply air uppermost Supply air Extract air Flushing water tray EQRZ-01 Drip tray for collecting condensate and flushing water Make sure that the damper blades are open when you flush them clean