OPERATION MANUAL Air Curtains MultiMAXX HT. Air Curtains for Industrial Application

OPERATION MANUAL Air Curtains MultiMAXX HT Air Curtains for Industrial Application

DencoHappel Product Range MultiMAXX HT DencoHappel Product Range 2 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Unit Type Code Unit Type Code MultiMAXX HT Accessories H T 8 2. U W A R A T. S S C Z H 2. 2 0 0 2 Model size 8 = Size 8 9 = Size 9 Capacity stage 2 = 2 fans* 3 = 3 fans 4 = 4 fans Aerodynamic function U = Recirculating-air unit Medium specification W = Only heating (PWW and PHW) 1 = Contact protection (only without heat exchanger) Heat exchanger A = Cu/Al, max. 130 C; 1.6 MPa C = Cu/Cu, max. 130 C; 1.6 MPa K = No heat exchanger Coil connection (front view) R = From right L = From left K = No heat exchanger** Model size 8 = Size 8 9 = Size 9 Suspensions 59 = For vertical installation 60 = For horizontal installation Material/Design 0 = Metal sheet Configuration for ZH..59../60.. Installation with wall clearance 0 = vertical installation (ZH.59..) 2 = 2 fans (ZH.60..) 3 = 3 fans (ZH.60..) 4 = 4 fans (ZH.60..) Installation without wall clearance 5 = vertical installation (ZH.59..) 6 = 2 fans (ZH.60..) 7 = 3 fans (ZH.60..) 8 = 4 fans (ZH.60..) Heat exchanger connection A = External screw thread K = Without connection Outlet P = Profile ceiling/wall T = Gate nozzle Ohne Auslass Motor/speeds S = 3 phases 400 V 3-speed - sickle-blade fan Electric equipment S = Fan isolator Design D = Industrial configuration - metal sheet in RAL 7000 * only for model size 8 ** available only on request PR-2011-0144-GB Subject to modifications R2-04/2016 3

Table of Contents MultiMAXX HT Table of Contents DencoHappel Product Range... 2 Unit Type Code... 3 Table of Contents... 4 1 Safety and User Instructions... 5 1.1 Scope of the operation manual... 5 1.2 Used symbols... 5 1.3 Safety-conscious working... 7 1.4 Proper use... 7 1.5 Safety regulations and codes... 8 1.6 Modifications and changes... 8 1.7 Spare parts... 8 1.8 Personnel selection and qualification... 8 2 Technical Description... 9 2.1 Unit configuration and scope of supply... 9 2.2 Specification of material... 10 2.3 Unit variants... 10 2.4 Unit components... 10 2.5 Operating conditions... 10 2.6 Unit dimensions... 11 2.7 Unit weight and water charge of heat exchanger... 13 2.8 Operating limits... 13 2.9 Sound and electric data... 13 3 Shipping and Storage... 14 3.1 Shipping... 14 3.2 Shipping and handling of unit... 14 3.3 Storage... 14 4 Assembly... 15 4.1 Load-bearing capacity of the installation site... 15 4.2 Horizontal installation... 15 4.3 Vertical installation... 16 4.4 Safety clearance... 17 4.5 Unit installation... 17 5 Coil Connection... 18 5.1 Pipe connections... 18 5.2 Dimensions of heat exchanger connections... 18 6 Electrical Connection... 19 6.1 Wiring diagrams... 19 6.2 Fan isolator... 20 6.3 Motor terminal diagram for 3-speed three-phase external rotor motor 3 x 400 V, 50 Hz (motor type S)... 21 6.4 Wiring with control units MC 303 or controls by others... 22 6.5 Wiring room thermostat... 22 7 Commissioning... 24 7.1 Pre-commissioning checklist... 24 7.2 Unit air venting... 25 7.3 Operation... 25 7.4 Operating instructions... 25 7.5 Deactivating unit... 25 8 Maintenance and Troubleshooting... 26 8.1 Maintenance... 26 8.2 Half-yearly maintenance... 27 8.3 Annual maintenance... 27 8.4 Operating faults... 28 9 Disassembly and Disposal... 29 9.1 Disassembly... 29 9.2 Recycling... 29 4 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Safety and User Instructions 1 Safety and User Instructions This is an original operation manual verified by the manufacturer. The MultiMAXX HT air curtains are developed and manufactured in accordance with the state-of-the-art technological standards and established technical safety codes and meet the requirements of the EC Directive on Machinery. The MultiMAXX HT gate air curtains are reliable in operation and satisfy strict quality standards. This product range combines future-oriented technology with a high level of user friendliness and ease of maintenance. Nevertheless, an air curtain unit could pose unavoidable residual risk of injury or risk of equipment or property-damage only accidents. Therefore your personal safety and the proper operation of the unit depend on the strict observance of the safety instructions. Failure to follow the safety precautions could result in death, serious injury or equipment or property-damage-only accidents. Observing the safety instructions in the current operation manual will help avoid the risks, ensure economical operation of the unit and enjoy full benefits of the product. The safety aspects covered by this chapter are valid for the entire operation manual. 1.1 Scope of the operation manual 1.2 Used symbols This operation manual covers critical points on the following subjects: Shipping Assembly Installation Electrical connection Medium connection Commissioning Operation Maintenance, cleaning and disposal The following symbols are used to highlight specific text sections in this operation manual: Indicates text paragraphs Indicates work steps Indicates work results Refer to this section for additional information on energy-efficient operation of the MultiMAXX HT gate air curtain units. RECYCLING! This symbol is used to highlight instructions on proper reuse of packaging material and disused assembly groups (separated according to recyclable materials). PR-2011-0144-GB Subject to modifications R2-04/2016 5

Safety and User Instructions MultiMAXX HT The following designations and symbols are used for specifying safety instructions. RISK OF ACCIDENT DUE TO ELECTRICAL CURRENT! This symbol indicates a risk of accident due to electric shock. PERSONAL INJURY! This section specifies procedures and precautions for preventing personal injury. DANGER DUE TO OVERHEAD LOADS! This symbol warns about personal injury and damage caused by overhead loads and suspended heavy objects. DANGER OF HOT SURFACES! This section specifies procedures and precautions for preventing personal injury resulting from contact with hot surfaces. DANGER SHARP CUTTING EDGES! This section specifies procedures and precautions for preventing personal injury resulting from cuts on thin metal fins. HIGH PRESSURE HAZARD! This section specifies procedures and precautions for preventing personal injury resulting from high pressure. WARNING: RISK OF ROTATING COMPONENTS! This section specifies procedures and precautions for preventing personal injury resulting from rotating unit components. RISK OF ACCIDENT DUE TO HOT MEDIUM! This section specifies procedures and precautions for preventing personal injury resulting from contact with hot medium. DANGER OF INFLAMMABLE SUBSTANCES! This section specifies procedures and precautions for preventing personal injury resulting from fire hazard. ENVIRONMENTAL DAMAGE! This symbol warns about damage to the environment and turns attention to all existing national environmental protection regulations. EQUIPMENT DAMAGE! This section specifies procedures and precautions for preventing damage to MultiMAXX HT air curtain unit. 6 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Safety and User Instructions 1.3 Safety-conscious working Observe the following instructions during installation, settings, service and maintenance tasks: ELECTRICAL HAZARD! Disconnect all electric power of the unit and ensure the power cannot be inadvertently energised, earth, short-circuit and block off all neighbouring live parts. Noncompliance can lead to death or serious injury. Fluctuations and imbalance in supply voltage must not exceed tolerance limits specified on the unit identification plate; otherwise this could cause severe unit malfunction or failure. 1.4 Proper use The MultiMAXX HT gate air curtains can be installed in industrial facilities, warehouses, sales and exhibition buildings. Mounting brackets, control units and control devices can be supplied as optional accessories. Proper use also stipulates the observance of the current operation manual as well as adherence to all inspection and maintenance intervals specified by DencoHappel. For operating Cu/Al (Cu/Cu) heat exchangers the following limit values must be observed: Parameter Unit Value ph value (at 20 C) 7.5-9 Conductivity (at 20 C) ms/cm < 700 Oxygen content O 2 mg/l < 0.1 Total hardness dh 1-15 Dissolved sulphur S not detectable Sodium Na + mg/l < 100 Iron Fe 2+, Fe 3+ mg/l < 0.1 Manganese Mn 2+ mg/l < 0.05 Ammonium content NH + 4 mg/l < 0.1 Chloride Cl - mg/l < 100 Sulphate SO 2-4 mg/l < 50 Nitrite NO - 2 mg/l < 50 Nitrate NO - 3 mg/l < 50 Tab. 1-1: Limit values for different medium types in closed-loop heating circuits EQUIPMENT DAMAGE! In open systems (e.g. when using well water) observe the limit values specified in table Tab. 1-1. If the limit values are exceeded, a filter must be installed to clean the medium. Excess of these values can cause formation of deposits in the medium and creates a risk of erosion. At the same time the unit must be protected against dust and other elements that can result in acidic or alkaline reaction with water (aluminium corrosion). Improper use Any use other than that described above is considered improper. The manufacturer/ supplier is not liable for any damages arising from improper use. The user alone bears the risk. PR-2011-0144-GB Subject to modifications R2-04/2016 7

Safety and User Instructions MultiMAXX HT PERSONAL INJURY! The MultiMAXX HT gate air curtains must not be operated: in explosion risk areas, in rooms with high dust or moisture content, in rooms with strong electromagnetic fields, in rooms with aggressive environment that may attack plastics. The following accident prevention regulations are valid (VBG1, BGV A2 (previously: VBG4), VBG7w, VBG9a) and generally recognized codes for machinery and principles of engineering, in particular DIN VDE 0100, DIN VDE 0105. 1.5 Safety regulations and codes When carrying out assembly, electric installation, commissioning, maintenance and service of the MultiMAXX HT gate air curtains - relevant national safety regulations and codes as well as generally established technical practices must be considered. 1.6 Modifications and changes It is not allowed to modify, add components, or convert the MultiMAXX HT gate air curtain unit in any way. Changes or modifications of the DencoHappel units will invalidate the CE conformity and render and all warranty claims as null and void. 1.7 Spare parts Only original DencoHappel spare parts are allowed, since DencoHappel is not liable if third-party spare parts are used. 1.8 Personnel selection and qualification Before beginning any work on the MultiMAXX HT gate air curtain the personnel must have read through this operation manual carefully and understood it. Please read this document fully before commencing the task, and not while performing a task. Electrical connection must only be carried out by qualified licensed staff or other individuals with proper professional training and experience in the following areas: Regulations concerning health and safety in the workplace Accident prevention regulations Directives and recognized codes of practice All skilled staff must be able to assess the entrusted work and must be able to recognize and avoid all associated dangers. 8 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Technical Description 2 Technical Description 2.1 Unit configuration and scope of supply 7 2 5 3 4 6 1 Fig. 2-1: Unit configuration 1: Sickle-blade fan with contact protection grille 2: Fan module 3: Heat exchanger 4: Heat exchanger casing 5: Profile outlet ceiling 6: Plastic terminal box 7: Fan isolator PR-2011-0144-GB Subject to modifications R2-04/2016 9

Technical Description MultiMAXX HT 2.2 Specification of material Unit part Material Fan with contact protection grille Various materials Fan module Galvanized sheet steel or galvanized sheet steel with paint finish Heat exchanger Cu/Cu or Cu/Al Heat exchanger casing Galvanized metal sheet Outlet Aluminium fins + painted galvanized metal sheet RAL 7000 Terminal box / switch Various materials Tab. 2-1: Specification of material 2.3 Unit variants Fig. 2-2: Air curtain unit with suspension for horizontal installation Fig. 2-3: Air curtain unit with suspension for vertical installation 2.4 Unit components The MultiMAXX HT air curtain unit is performed with 2 to 4 fans. The heat exchanger casing shall be galvanized and painted metal sheet in RAL 7000. The casing is optionally available in other RAL colours selected by the customer. One of two possible outlet variants is installed on the discharge side (refer to unit type code). The rear side of the unit is fitted with axial fans with an integrated contact protection grille that prevents risk posed rotating parts. This requirement meets the EN ISO 13857 standard. For securing horizontal and vertical unit suspensions the sides of the fan section are fitted with 2 x 4 rivet nuts. 2.5 Operating conditions The unit is not designed for medium types that can damage or destroy the surface coating due to corrosive, chemical or abrasive effects. Only non-corrosive and non-combustible liquids or steam must be used as a medium (refer to Tab. 1-1). 10 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Technical Description 2.6 Unit dimensions 2.6.1 Unit dimensions MultiMAXX HT, heat exchanger in Cu/Al, Cu/Cu 2 fans 3 fans 4 fans Fig. 2-4: Unit dimensions MultiMAXX HT PR-2011-0144-GB Subject to modifications R2-04/2016 11

Technical Description MultiMAXX HT Fig. 2-5: Unit dimensions MultiMAXX HT Dimensions [mm] / unit size HT 82 HT 83 HT 84 HT 93 HT 94 A 1555 2280 3005 2760 3645 B 555 555 555 652 652 C 486 486 486 564 564 D 0 56 56 56 56 E 1447 2172 2897 2652 3537 F 724 724 724 884 884 G 1 1/4" 1 1/4" 1 1/4" 2" 2" H 725 725 725 885 885 J 700 700 700 860 860 L 707 707 707 867 867 M 150 150 150 230 230 N 957 957 957 1024 1024 P 1274 1274 1274 1449 1449 T 417 417 417 525 525 Dimensions [m] / accessories ZH8 59 00 ZH8 59 05 ZH9 59 00 ZH9 59 05 K 687 257 527 97 Dimensions [m] / accessories ZH8 60 02(3,4) ZH8 60 06(7,8) ZH9 60 02(3,4) ZH9 60 06(7,8) S 680 250 520 90 Tab. 2-2: Unit dimensions MultiMAXX HT 12 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Technical Description 2.7 Unit weight and water charge of heat exchanger Model size Tab. 2-3: Weight including heat exchanger Water charge of heat exchanger Cu/Al [kg] Cu/Cu [kg] Cu/Al a Cu/Cu with T outlet with P outlet with T outlet with P outlet [l] HT82 129 133 139 143 5.3 HT83 174 180 190 196 8.6 HT84 229 237 251 259 12.0 HT93 275 281 297 305 13.4 HT94 390 398 424 432 18.8 Unit weight and water charge of heat exchanger 2.8 Operating limits All other important data on unit capacity, weights, connections and sound power is specified in the MultiMAXX HT Air Curtain Units - Data and Facts". Unit Max. ambient temperature -20 C to +40 C Operating voltage 3 x 400 V or 1 x 500 V~ 50 Hz Protection class IP54 Power consumption see unit identification plate Corrosion-resistance class C3 - EN ISO 12944-2 Max. dust concentration in the air 10 mg/m 3 Heat exchanger Cu/Al and Max. operating temperature 130 C Cu/Cu Max. medium pressure 1.6 MPa 2.9 Sound and electric data Model size Speeds Speed RPM Sound power db(a) A-rated sum level Sound pressure* db(a) Max. power consumption kw Max. current A Motor S - 3 x 400 V 3-speed 1 450 61 47 0.18 0.52 HT82 2 680 71 57 0.54 0.88 3 900 76 62 0.76 1.46 1 450 63 49 0.27 0.78 HT83 2 680 73 59 0.81 1.32 3 900 78 64 1.14 2.19 1 450 64 50 0.36 1.04 HT84 2 680 74 60 1.08 1.76 3 900 79 65 1.52 2.92 1 420 69 55 0.36 1.38 HT93 2 660 78 64 1.23 2.22 3 870 83 69 2.04 4.05 1 420 70 56 0.48 1.84 HT94 2 660 79 65 1.64 2.96 3 870 84 70 2.72 5.40 Tab. 2-4: Sound and electric data * Sound pressure: standard values at 5 m distance to the unit side, at maximum air flow rate and low reflection room. Industrial hall volume 1500 m 3, absorption surface 200 m 2 Sabin, hemispherical radiation = direction coefficient 2. These values can be significantly influenced by the indoor characteristics in a positive or negative way. PR-2011-0144-GB Subject to modifications R2-04/2016 13

Shipping and Storage MultiMAXX HT 3 Shipping and Storage 3.1 Shipping Manufacturer s instructions regarding transporting and storing the unit must be followed (see labels on the packing). When the air curtain is delivered and unpacked, check that the delivery is correct according to the despatch note, and also check for completeness and transit damage. Ship and store air curtains in original packing! EQUIPMENT DAMAGE! After the shipment ensure that the unit is not damaged. Claims for damage or missing parts can only be filed with the insurance company only if shipping damage is confirmed by an authorized worker of the transportation company. 3.2 Shipping and handling of unit Attach lifting gear to the designated points of the assembly unit. Chains/slings should not be knotted and/or be exposed to sharp edges. Special attention must be given to equal weight distribution. Only lifting gear with sufficient load carrying capacity is allowed. DANGER OF OVERHEAD LOADS! Do not raise units overhead with personnel below units. PERSONAL INJURY! Do not use damaged transport devices. Use a fork lift truck only if the unit is placed on a pallet. DANGER SHARP CUTTING EDGES! Use personal protective equipment such as safety gloves, footwear and clothes for unit shipping. 3.3 Storage Protect the MultiMAXX HT unit from humidity and dirt. The unit must be stored in a weather-proof manner indoors in accordance with class IE12 and EN 60 721-3-1 standard. Allowed storing conditions: Air temperature: -25 C to +40 C Air humidity: between 50 and 85 % (relative humidity with no condensation) 14 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Assembly 4 Assembly 4.1 Load-bearing capacity of the installation site The assembly site must be vibration-free and suitable for permanently supporting the weight of the gate air curtain unit. If necessary, the approval of a structural engineer or architect has to be received. For mounting the unit, 2 sets with 4 M8 nuts are placed on the fan module refer to Fig. 2.4 and Fig. 2.5. The fixing material is enclosed with suspensions. Unused M8 riv-nuts should be covered by M8 screws that hold the unit to the transport pallet. 4.2 Horizontal installation It is necessary to consider the suspension height and minimum distance to ceiling. Horizontal installation with profile outlet (P) Horizontal installation with gate nozzle (T) Fig. 4-1: Max. suspension height with horizontal installation - P and T outlet. Dimension Model size (m) HT82 HT83 HT84 HT93 HT94 A 1.6 2.3 3.1 2.8 3.7 B 5 5 5 5.5 5.5 C 5.5 5.5 5.5 6.0 6.0 The data in the chart are approximated values and apply to 3rd fan speed and discharge temperature exceeding indoor temperature by Δ15 to 20 K. PR-2011-0144-GB Subject to modifications R2-04/2016 15

Assembly MultiMAXX HT The maximum suspension height for horizontal installation depends on the fan speed - the lower the speed, the smaller the height. Minimum clearance to ceiling (see figures) provides enough space for air intake and service and maintenance. If the minimum clearance to ceiling is not adhered to, unit capacity can change and fan can be damaged. 4.3 Vertical installation Vertical installation with profile outlet (P) Vertical installation with gate nozzle (T) Fig. 4-2: Max. gate width for vertical installation - P and T outlet. Dimension (m) Model size HT82 HT83 HT84 HT93 HT94 A - 4.5 (8.0) 4.5 (8.0) 5.0 (8.5) 5.0 (8.5) B - 2.2 2.9 2.7 3.5 C - 5.5 (10.0) 5.5 (10.0) 6.0 (10.5) 6.0 (10.5) The data in the chart are approximated values and apply to 3rd fan speed and discharge temperature exceeding indoor temperature by Δ15 to 20 K. Values in brackets apply to two units that are installed at two opposing gate sides. 16 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Assembly For wide gates two opposite air curtain units can be installed. (see table page 16) Minimum clearance to wall (see figures) provides enough space for air intake and service and maintenance. If the minimum clearance to wall is not adhered to, unit capacity can change and fan can be damaged. 4.4 Safety clearance When installing your air curtain unit, the following safety clearances must maintained: at least 400 mm from unit sides and 1000 mm in air flow direction (as specified by CSN 06 1008 and CSN 13501-1). 4.5 Unit installation For horizontal configuration units must be installed level to allow access for air venting and draining of the heat exchanger. Draining the heat exchanger with a vertical installation is carried out using the drain valve which is located at the bottom side of the heat exchanger. An air vent valve must be installed by others on site. The casing of the heat exchanger must be protected during soldering of connection fittings. EQUIPMENT DAMAGE! The unit must be installed in a stain-free, vibration-free and twist-free way. Gate air curtains must be installed in a safe, reliable and visually adequate manner. For these reasons, it is recommended to use manufacturer s suspensions and mounting brackets. PR-2011-0144-GB Subject to modifications R2-04/2016 17

Coil Connection MultiMAXX HT 5 Coil Connection 5.1 Pipe connections The supply and return piping shall be run in such a way as to prevent mechanical stress and without placing a strain on the heat exchanger. Sufficient clearance around the gate air curtain unit must be ensured to allow for maintenance and servicing. Connected piping: pipe and heat exchanger venting must be performed by others on site! Attention! Inlet and outlet heating coil connections: give special attention to fitted labels! EQUIPMENT DAMAGE! Use a pipe wrench when attaching piping to coil fittings to prevent damage (refer to Fig. 5.1). Fig. 5-1: Connecting unit to pipework 5.2 Dimensions of heat exchanger connections For dimensions refer to Fig. 2-4 and Fig. 2-5 as well as heat exchanger connections in Tab. 2-2. 18 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Electrical Connection 6 Electrical Connection HAZARDOUS VOLTAGE! The electrical installation of the MultiMAXX HT air curtain unit must only be carried out by qualified electricians in observance of the current operation manual and the following regulations: VDE regulations, including safety regulations Accident prevention regulations Installation instructions 6.1 Wiring diagrams The electrical connection of MultiMAXX HT air curtain units must be performed in accordance with the valid connection diagrams. The connection diagram is attached to the inside cap of the fan isolator (see Fig. 6.1) or is enclosed separately. HAZARDOUS VOLTAGE! The connection diagrams do not specify any protective measures. Currently valid standards and regulations must be observed and checked with the local power company. 6.1.1 Cable connections The cable connections must be performed in compliance with the local regulations and code of practice. The selection of cable type and cable cross section must be performed by a qualified electrical engineer. Addition of components by others and field line runs must be designed for high temperatures and fitted with spacers. Electrically screened line must be used for the thermal contact and earth screen must be connected on one side to the protective conductor terminal (PE) in the control unit. The decision to apply electrical shielding at both ends can only be made on site (e.g. in case of severe interference) and the relevant applicable local regulations and codes of practice must be observed. After successful cable installation all cable entry points must be sealed in a splashproof manner. 6.1.2 Motor protection using thermal contact Fan motors of the MultiMAXX HT units are standard fitted with thermal contacts.the fusing and fan motor overtemperature protection is performed by wiring thermal contact to the control cabinet. Thus unit disconnection is ensured in a fault case. If the unit is operated by an external regulation system the thermal contact must be incorporated in the safety circuit. In this case DencoHappel can not assume any warranty obligations for such unit. 6.1.3 Operation of basic unit Air curtains can be operated with control units designed for recirculating-air units (refer Fig. 6-5). Operation with frequency converters or switch units with voltage reduction (e.g. transformer) is not possible. PR-2011-0144-GB Subject to modifications R2-04/2016 19

Electrical Connection MultiMAXX HT 6.2 Fan isolator The MultiMAXX HT air curtain units are supplied with a fan isolator. 1 2 Fig. 6-1: Position of fan isolator and terminal box Pos. 1 - Fan isolator (unit connection) Pos. 2 - Intermediate terminal box Fan isolator The fan isolator is only used to deactivate the fans for servicing and maintenance. It is not allowed to use this isolator for regular activation and deactivation of the unit. At the same time this isolator is used for incorporating the unit in the electrical circuit. 20 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Electrical Connection 6.3 Motor terminal diagram for 3-speed three-phase external rotor motor 3 x 400 V, 50 Hz (motor type S) With thermal contacts With pole-changing capability Winding ΔΔ/YY/Δ Without voltage change-over! For operating voltage refer to the unit identification plate. 6.3.1 3-speed operation at operating voltage 3 x 400 V with three-speed control unit (MC 303) (3 x 400 V) Connection cable: 9 + PE = 10 wires Electrically screened cable: 2 TC connecting wires Fig. 6-2: Motor terminal diagram - 3-speed operation 6.3.2 1-speed operation at operating voltage 3 x 400 V Connection cable: 3 + PE = 4 wires Electrically screened cable: 2 TC connecting wires 1-stage mode: stage III (ΔΔ) 1-speed mode: speed II (YY) 1-speed mode at speed I (Δ) Fig. 6-3: Motor terminal diagram - 1-speed operation In order to ensure proper operation of the unit, rotation direction marked with an arrow on the fan impeller must be maintained. To reverse the fan in case of wrong rotation direction, 2 phases must be changed. PR-2011-0144-GB Subject to modifications R2-04/2016 21

Electrical Connection MultiMAXX HT 6.4 Wiring with control units MC 303 or controls by others The components are connected via a terminal strip. ATTENTION! CONTROL UNITS! Wiring diagrams are enclosed with the corresponding MC 303 control units. NOTICE ON CONTROLS BY OTHERS! For details on connecting individual assemblies (e.g. fan, anti-freeze facility, etc.) refer to the unit-specific wiring diagram enclosed with the main unit. Before commencing connections, check that the order code of the unit's electrical equipment matches the wiring diagram. HAZARDOUS VOLTAGE! Before opening the connection box, the air curtain unit must be de-energised and isolated at all poles. Connections must only be performed in accordance with the unit-specific wiring diagram. 6.5 Wiring room thermostat Fig. 6-4: Wiring room thermostat 22 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Electrical Connection Room thermostat or gate terminal Intermediate terminal box Type: 981870 Power supply Control unit MC 303 Fig. 6-5: Wiring schematic for MultiMAXX HT and MC 303 control unit Required number of wires Control unit MC 303 3x400 V/50 Hz Cable 1 (power supply) 5 Cable 3 (fan motor) 10 Cable 4 (thermostat / gate contact) 4 / 2 Cable 5 (thermal contact) 2 The MC 303 control unit can be simultaneously used for two gate air curtain units (parallel operation). Wiring is performed using an additional intermediate terminal box. PR-2011-0144-GB Subject to modifications R2-04/2016 23

Commissioning MultiMAXX HT 7 Commissioning HAZARDOUS VOLTAGE! Before performing any work on the unit, ensure that the latter is isolated. Ensure that the unit is isolated and secured against being energised at an appropriate point of the on-site power supply. DANGER OF SCALDING! Prior to performing any work on the air curtain unit: Seal off the supply of heating medium before performing work on the valves or the inlet or outlet pipework. Ensure that the shut off pipework can not be opened inadvertently. Do not commence work before the heating medium has cooled down. WARNING: RISK OF ROTATING COMPONENTS! Rotating fan impellers pose a risk and may cause injuries. Before performing any work on the unit, ensure that the latter is isolated. Ensure that the unit is isolated and secured against being energised at an appropriate point of the on-site power supply. Before the commissioning make sure that the unit discharge (heat exchanger) is clean. Protect all electrical equipment and adjacent hardware against leaking water. 7.1 Pre-commissioning checklist Mechanical and electrical installation of the entire system comprising MultiMAXX HT unit is complete. The MultiMAXX HT unit is de-energised and isolated. All medium pipes were flushed and are free from residues and foreign matter. The unit is properly charged with medium (refer to "Proper use" on page 18). 7.1.1 Prior to commissioning the following checks must be carried out: Check all screwed pipe connections and fixing points. Check the unit for possible damage. (ensure that the air curtain is error-free). Checking plug fan: minimum clearance between impeller and air suction nozzle must correspond to a minimum 1% of impeller cross section. Open the valves in the pipework. If the pipework / heat exchanger were drained following the assembly, charge the system properly and perform its air venting.(refer to section 7.2). Give special attention to complete air venting of the unit in order to prevent formation of air bubbles in the heat exchanger. Check that the pipework and connections and tight and leak-free. Check electric connections and wiring, as specified in the wiring diagrams of the current operation manual or/and enclosed in the control box of the unit, MC 303 control box. Check correct air flow direction: fan rotating direction is correct, if air is discharged from the discharge louvres into the room. Perform adjustment of secondary-air louvre depending on desired air flow direction. Ensure that air draughts in the occupied zone are eliminated. After checks are carried out, close the plastic electrical control box. Prior to commissioning of the unit fitted with a fan isolator, switch the latter into ON position. 24 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Commissioning 7.2 Unit air venting Open all shut-off and control valves. Use an air venting key to open an air vent screw by others. Close the air-vent screw again, only if heating medium is still pouring out. 7.3 Operation 7.3.1 Fan Activation and deactivation is performed via a speed selection switch (mounted on MC 303 control box), or using a field-provided control contact. 7.4 Operating instructions Ensure free cross section and unobstructed air discharge at the outlet. Adjust the air flow to provide stable separation of air in the climate-controlled room from outside air. The fan isolator fitted on the unit is used for deactivation of the fan only. This switch is not used as the main isolator or emergency switch. 7.5 Deactivating unit Set the speed selection switch on the MC 303 control box to 0 position. PR-2011-0144-GB Subject to modifications R2-04/2016 25

Maintenance and Troubleshooting MultiMAXX HT 8 Maintenance and Troubleshooting 8.1 Maintenance We recommend to conclude a maintenance contract with a service company. The service firm staff should be trained by the unit manufacturer. HAZARDOUS VOLTAGE! Isolate all power supply connections to the air curtain unit and ensure the power cannot be inadvertently energised. WARNING: RISK OF ROTATING COMPONENTS! Wait to allow the fan rotational momentum to cease! RISK OF ACCIDENT DUE TO HOT MEDIUM! Wait until the heat exchanger of the air curtain unit has cooled down! For unit (air curtain) maintenance - inspections at regular intervals must be observed and possible malfunctions repaired (see Tab. 8.1). Maintenance must only be performed if the unit is fully isolated by authorized and qualified staff. Function test of the unit fan and heat exchanger must be included in the inspection. If necessary, possible dirt and solid deposits must be removed from the heat exchanger. Ensure that the impeller is not obstructed and rotate the fan impeller to ensure free movement. The impeller surface must maintain the same distance to the inlet nozzle. List of regular maintenance procedures The following maintenance tasks must be performed at the indicated time intervals. Maintenance interval Components Half-yearly Annually Before cooling season Checking air intake grille * x Checking air discharge grille * x Checking fan or fan section * x Checking screw connections of pipes** x Checking electrical connections x Checking earthing x Air venting heat exchanger ** x Checking antifreeze agent (if used) in medium * If necessary, clean and remove foreign objects Tab. 8-1: Regular maintenance 26 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Maintenance and Troubleshooting 8.2 Half-yearly maintenance 8.2.1 Checking fan Check: fan impeller to confirm it turns freely in the proper direction power supply cable of the fan motor for damage power supply cable of the fan motor on the terminal strip mounted on the fan module 8.3 Annual maintenance 8.3.1 Cleaning heat exchanger Compressed air can be used to clean a dirty heat exchanger. Remove the outlet louvre before cleaning the heat exchanger. Adhere to the specified sequence (1-3) when removing heat exchanger (see Fig. 8-1). Use a compressed-air jet (2) to clean the heat exchanger fins. Mount the louvre on the unit. For unit commissioning follow the relevant instructions specified in chapter 7 Commissioning. Fig. 8-1: Cleaning heat exchanger EQUIPMENT DAMAGE! Beware not to damage fins or louvres during cleaning of heat exchanger. Non compliance will result in the reduction of heating output. Drain water from the heat exchanger, if the air curtain is deactivated for the winter period. Otherwise this may cause water in the heat exchanger to freeze. PR-2011-0144-GB Subject to modifications R2-04/2016 27

Maintenance and Troubleshooting MultiMAXX HT 8.4 Operating faults Symptom Possible cause Action/remedy Fan fails to start Unit not switched on Switch on unit Fan isolator (optional) is activated Warning lamp "Operation" on the MC Missing supply voltage Check fuse/circuit breaker/power supply (technical personnel only) 3xx control panel is inactive Electric lines not connected Connect electrical cables (technical personnel only) Failure in unit fusing Replace fuses (technical personnel only) Controller switched off fan on reaching room temperature Refer to the operation manual for control panels, increase the setpoint on the control panel. Fan fails to start Fan isolator (optional) is activated Warning lamp "STOP" (fault) on the MC 3xx control panel is active Unit too noisy Unit fails to heat/heats insufficiently (pumped warm water) Water leakage around unit Motor protection was activated Unit running at too high RPM Air intake or discharge areas blocked Noisy fan bearings Fan not switched on Air flow rate of unit too low Air intake or discharge areas blocked Fan blocked/faulty Heating medium is not hot Water flow rate too low Leaking heat exchanger or hydraulic connections * Reactivation after cause is eliminated (troubleshooting): Use control panel to set speed selection switch to 0, switch to the required speed again Tab. 8-2: Causes of malfunctions and remedies Check temperature of the fan motor, allow time to cool down, if required, and activate again (in case of a repeated fault always make sure that the cause of the fault is identified). Set a lower RPM Clear discharge/air intake of obstructions or bends Replace faulty fan (technical personnel only) Switch on fan Select higher speed Clear or clean ducts Check fan, replace if necessary (technical personnel only); also refer to Fan fails to start Switch on the heating system (boiler) Switch on the circulating pump Unit air venting Check pump capacity (technical personnel only) Check pipe run balance and adjust using calculated pressure drop (technical personnel only) Check heat exchanger, vent and valve connections for leak-free state On valves, check screw connections for ease of movement, clean sealing surfaces and replace seals, if necessary (technical personnel only) Check soldered joints between collector and heat exchanger tubes and on heat exchanger deflection bends for leaks; in this case, replace heat exchanger (technical personnel only) If the malfunction cannot be eliminated by the maintenance personnel, please consult our authorized service department. 28 PR-2011-0144-GB Subject to modifications R2-04/2016

MultiMAXX HT Disassembly and Disposal 9 Disassembly and Disposal ENVIRONMENTAL DAMAGE! Dismantling and disposal of the MultiMAXX HT air curtain unit must only be performed by qualified and licensed staff. 9.1 Disassembly For dismantling the MultiMAXX HT unit consider the following instructions: HAZARDOUS VOLTAGE! When carrying out decommissioning and dismantling work on the air curtain, disconnect all power supply connections, ensure the power cannot be inadvertently energised and verify that electrical lines have been disconnected. When carrying out decommissioning and dismantling jobs on the unit, isolate all power supply connections and ensure that power cannot be inadvertently energised. Earth and isolate all adjacent live parts. Non-compliance can lead to death or serious injury. HIGH PRESSURE HAZARD! When carrying out decommissioning and dismantling jobs on the air curtain, shut off and evacuate/empty all connected piping until system pressure has equalized with ambient air pressure. Failure to follow safety precautions can result in serious injury. Isolate all connections and ensure there are no leaking materials such as oil, refrigerant and water-glycol mix. Loosen the connections. PERSONAL INJURY Secure the air curtain against slipping. Relevant shipping instructions for units must be followed. 9.2 Recycling RECYCLING! Ensure safe and environmentally friendly disposal of operating, auxiliary and packing materials as well as spare parts. Consider and follow local regulations and codes of practice regarding recycling procedures. For disposal - unit components must be separated and grouped according to their features and material type in the best possible manner (refer to unit specification on page 11). ENVIRONMENTAL DAMAGE! Dispose of all operating materials (e.g. oil, refrigerant and water-glycol mix) and components in an environmentally-friendly manner and in compliance with local laws and regulations. PR-2011-0144-GB Subject to modifications R2-04/2016 29

MultiMAXX HT PR-2011-0144-GB Subject to modifications R2-04/2016 31

MultiMAXX HT EC Declaration of Conformity pursuant to Directive 2006/42/EC of the European Parliament and of the Council (original EC Declaration of Conformity) 2016/092/5AA68788 Manufacturer: DencoHappel CZ a.s., Slovanská 781, 463 12 Liberec XXV - Vesec, Czech Republic, ID No.: 46708375 Entity authorized to compile technical documentation: DencoHappel CZ a.s., Slovanská 781, 463 12 Liberec XXV - Vesec, Czech Republic, ID No.: 46708375 Description and identification of machinery: Air curtains SAHARA MAXX / MultiMAXX type HTXX.XXXXXX.XXX including accessories and MC 303 control cabinet Air curtains SAHARA MAXX HT/MultiMAXX HT, including accessories and MC 303 control cabinet, are installed in industrial, warehouse, sale and exposition buildings, i.e. standard environment pursuant to EN 60721-3-3. It is used to prevent the passage of untreated outside air into the interior of the building and the leakage of conditioned air from within. It is possible to order accessories, such as brackets and control cabinets (controls) with corresponding sensors. Declaration: The machinery complies with all relevant provisions of Directives 2006/42/EC, 2014/30/EC and 2014/35/EC. List of harmonized standards applied in the conformity assessment: EN 953+A1:2009, EN 1037+A1:2009, EN ISO 12100:2011, EN ISO 13732-1:2009, EN ISO 13857:2008, EN ISO 3746:2011, EN ISO 11202:2011, EN 60335-1 ed.2:2003, EN 60335-2-40 ed.2:2004, EN 55014-2:1998, EN 62233:2008 List of other technical standards and regulations: EN 307:1999 This declaration relates exclusively to the machinery in the state in which it was placed on the market, and excludes components which are added and/or operations carried out subsequently by the final user. Issued at Liberec: 1.4.2016 Name, title: Ing. Jiří Doubrava, chairman of the board Signed PR-2011-0144-GB Subject to modifications R2-04/2016 33

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. DencoHappel CZ a.s. Subject to modifications R2-04/2016 PR-2011-0144-GB 735 5043 www.dencohappel.com