MRH Installation and Operating Instructions for English Originalversion
Previous issues: IMO_MRH_en_06_04_2017 Changes: Chapter 7 changed App. 4, 6, 7 changed App. 5 - new IMO_MRH_en_17_02_2017 Changes: App. 4: wiring and explanation changed IMO_MRH_en_31_07_2018 Changes: Chapters 2.3, 5.1, 10.1: size 1250 added, condensation warning App. 1 - additional sizes App. 2 - size 1250 added, installation examples, MRH 1120 and 1250 change of roof angles App. 3 – wirings added App. 4, 5 - size 1250 added App. 4, 5 - end switches functioning scheme added App.
Contents 1 General information ................................... 4 9 Operation ................................................. 12 1.1 List of information ........................................ 4 9.1 Operation/use generally ............................. 12 1.1.1 Specific safety symbols ................................. 4 9.2 Emergency use (use in case of fire) ............. 12 1.1.2 List of instructions for action ........................ 5 9.
General information 1 General information 1.1 List of information DANGER Direct danger Failure to comply with this warning leads directly to death or to serious bodily harm. WARNING Possible danger Failure to comply with this warning potentially leads to death or to serious bodily harm. CAUTION Hazard with a low risk Failure to comply with this warning potentially leads to moderate injuries. ATTENTION Hazard with risk of property damage Failure to comply with this warning leads to property damage.
Important safety information WARNING Hazard from hot surface! This warning identifies situations with a danger from overheating. Failure to comply with this warning potentially leads to property damage. 1.1.2 List of instructions for action Instruction for action Carry out this action. (if applicable, further action) 1.2 Notes on the documentation WARNING Hazard as a result of improper dealing with the device These operating instructions describe safe use of the device.
Warranty 2.2.2 Work on the electrical equipment Work on the electrical equipment of the fan may only be done by a qualified electrician or electro technically educated person. This person must know the relevant safety rules to recognise and avoid potentially risks. 2.2.3 Personnel for operation, use, maintenance and cleaning Operation, use, maintenance and cleaning may only be carried out by trained and authorized personnel.
Transport, storage 4 Transport, storage 4.1 Transport Each device leaves our plant in an electrically and mechanically proper condition. The devices are delivered in wooden crates or on pallets. We recommend transporting the fans to the installation site in original packaging. WARNING Hazard of impact if the device falls down! Load and unload the device carefully in order to avoid possible damage. Pay attention to the weight and dimensions of the packaging.
Description 5 Description The casing is made as a double metal layer with mineral wool insulation. The hatch casing is made of pre-galvanised steel while the hatch cover of AlMg3. Insulation thickness: walls 120 mm (k = 0,29 W/m2K), cover 150 mm. Directly powered impeller from aluminium alloy is arranged with the motor inside the air flow. Impeller is fastened together with hub and secured screw directly on to the motor shaft. Dynamically balanced to BV-3, ISO 14694.
Electrical connection Avoid distortions of the casing at installation. Check the air gap impeller/housing after fixing the MRH, the minimum air gap should remain over allowed minimum from the fan`s test protocol. Ensure unobstructed and uniform intake into the fan as well as free outlet. Install connecting ducts and accessories. The suction side of the fan is provided with a connection for flange-type mounting of the air duct according Eurovent 1/2, dimensions see Appendix 1 or www.systemair.com.
Commissioning WARNING Hazard from electrical voltage! Electrical connection only by a trained electrician rsp. trained and instructed qualified personnel! Electrical connection in accordance with the valid regulations. Prevent the ingress of water into the connection box.
Commissioning 8.2 Commissioning WARNING Hazard from electrical voltage! Commissioning by trained and instructed qualified personnel only! Check: service switch of the fan is in off position and the actuator`s service switch is in 0 (middle) position. Check also the instructions of the fan – since different fans can be built in, different requirements could apply. Check if the power supply is provided. Switch the actuator`s service switch to position 1 (open the cover).
Operation DANGER Hazard from crushing/shearing by the hatch cover! The hatch cover can be stopped in any position by turning the actuator`s service switch to middle (0) position. Check the functioning of system – observe instructions of actuator, especially intermittence and time of presence of control voltage (see also Appendix 4). After checking set the actuator`s service switch to position 1 (ready to open) and secure it. 9 Operation 9.
Operation 9.3 Dual use of hatch + fan (daily powered ventilation + emergency use) In addition to serially equipped device it is necessary to provide following safety measures: Protective guard to completely prevent access to opened/closed hatch cover – it is to provide by installer up to roof design. Hazard signs. Once safety assured with above measures, it is to observe: Safety components must not be bypassed or put out of function. Prevent sucking of foreign particles, this can destroy the fan.
Maintenance/troubleshooting 10 Maintenance/troubleshooting DANGER Hazard from touching impeller, if not covered with protective grid! The outlet protective grid is serially provided. At maintenance and service observe: Impeller must stand still; Electrical circuit must be interrupted and secured against restarting; Observe the rules for safe work. Only then the outlet protective grid can be temporarily removed.
Maintenance/troubleshooting 10.1 Malfunctions and troubleshooting (generally) The ventilator does not run Air volume is too low Thermal protection of the fan switches off Possible reasons Connection to the mains fault. Thermal protection triggers. Motor fault. Wrong direction of rotation. Too high pressure drop in system. Obstacles in duct. Short-circuit. Damage to the bearings. Impeller blocked or grinding.
Maintenance/troubleshooting Maintenance and check points of fans similarly to VDMA 24186-1 (type, scope and maintenance intervals to be specified in dependence of use and operating conditions). VDMA 24186-1 Description Maintenance interval Monthly 1.1.11 6.1.1 6.1.2 10.1.6 10.1.9 6.1.4 10.1.3 6.1.3 10.1 10.1.7 10.1.12 5.5.1 5.5.4 5.2.1 5.2.3 5.1.1 10.
Uninstalling/dismounting 11 Uninstalling/dismounting DANGER Hazard from crushing/shearing by the hatch cover! The hatch cover can be stopped in any position by turning the actuator`s service switch to middle (0) position.
Appendix 1: Dimensions MRH for flat or inclined roof, mounting with adjustable sidebars Lifting eye position; remove them after installation øD øD1 nxM A A1 A2 B B1 B2 MRH 400 400 450 8 x M8* 1010 750 1070 1010 750 1050 MRH 450 450 500 8 x M8* 1010 750 1070 1010 750 1050 MRH 500 500 560 12 x M8 1010 750 1070 1010 750 1050 MRH 560 560 620 12 x M8* 1010 750 1070 1010 750 1050 MRH-H 560 H=1500 560 620 12 x M8* 1010 750 1070 1010 750 1050 MRH 630 630
MRH for flat roof, mounting with fixed sidebars Lifting eye position; remove them after installation øD øD1 nxM A A1 A2 B B1 B2 MRH 400-2-XX-F400 400 450 8 x M8* 1010 750 1070 1010 750 1050 MRH 450-2-XX-F400 450 500 8 x M8* 1010 750 1070 1010 750 1050 MRH 500-2-XX-F400 500 560 12 x M8 1010 750 1070 1010 750 1050 MRH 560-2-XX-F400 560 620 12 x M8* 1010 750 1070 1010 750 1050 MRH 630-2-XX-F400 630 690 12 x M8* 1010 750 1070 1010 750 1050 MRH 710-4-X
Appendix 2: Installation examples General requirements Avoid possible interference of air streams with another MRH! Better installation to avoid possible interference of air streams with another MRH! MRH too close to each other – no place for service! Leave enough place for service – at least B2 between both units (B2 – see dimensions)! Service switch must not be covered with snow! Keep access to service switch always free of snow! Hatch allows snow deposit up to SL class.
Possible vertical positions and adjustment of sidebars to roof pitch – MRH with adjustable sidebars MRH ~HG 400 - 630 0 1 2 3 5 0 – 12° 0 – 12° 250 500 0 – 2° min 21° max. 33° MRH ~HG 1 2 3 710, 800 0 4 5 0 – 12° 0 – 12° 250 500 0 – 2° min 20° max. 31° MRH ~HG 1 2 3 900, 1000 0 4 5 0 – 9° 0 – 9° 250 500 0 – 2° min 14° max. 21° MRH ~HG 1 2 3 1120, 1250 0 4 5 0 – 8° 0 – 8° 250 500 4 0 – 2° min 12° max.
Mounting of MRH with adjustable sidebars 1 - Three height positions of sidebars (0, 250, 500 mm from the bottom); 2 - The sidebars adjust to the roof pitch and fasten all bolts (2 or 3 bolts each sidebar, depending on the sidebar position); 3 - Fasten the bars to the roof frame with bolts or studs; 4 - Fasten the sidebar with attached screws to the wall of MRH; 5 - Remove the hinges. *The MRH centreline can deviate from the vertical for max. +/- 5° - this can be combined with the sidebar setting.
Mounting of MRH with fixed sidebars *The MRH centreline can deviate from the vertical for max. +/- 5° . **Avoid additional load to MRH due to weight of eventual duct with flexible connection. *** Fix MRH with bolts to the roof construction. Roof insulation and flashing is not shown in the installation example. MRH 18.08.
Appendix 3: Wiring diagram, connection NOTE 1. 2. 3. 24 PTC built-in motor on request only. NO+NC terminals always in switch. PTC terminals may be abandoned in some type of switches. MRH 18.08.
Service switch item (pos. 1) 9993431 Terminals Rated current (A) 3p + NO + NC 930637 8p + NO + NC 930638 8p + NO + NC 939790 9993612 Nominal motor power (kW) d max (mm) D max (mm) Serially equipped cable gland (pos.
Appendix 4: Connection of actuator to 24VDC actuator 1 service switch 24VDC * NO, NC switch position control ** actuator 2 (only MRH 1120, 1250) internal floating limit switches – drawn position closed hatch *** Connection of actuator in the actuator`s service switch * connect to 24VDC (+30/-20%) ** NO/NC are intended to control position of the actuator`s service switch (ON - OFF) Warning: the control voltage 24VDC to open or close hatch cover should apply max.
Appendix 5: Connection of actuator to 230VAC Power supply MRH 400÷1000 230VAC and Power supply MRH 1120÷1250 230VAC with service switch are optionally available pre-mounted to control via 230VAC (50/60 Hz) the position of hatch of MRH with adjustable sidebars. It is serially mounted on MRH for flat roof mounting with fixed sidebars. Inside control box there are also terminals for monitoring the position of the hatch and service switch. Product must be protected from direct influence of precipitation.
Color No.
**** Circuit diagram: drawn position “CLOSED” (Potential free NC contacts, load capacity 24VDC/1A) Connection of actuator`s internal floating limit switches in the control box (1 actuator up to MRH 1000) 1-2 opened, 2-3 closed in closed hatch position 1-2 closed, 2-3 opened in opened hatch position 1-2 closed, 2-3 closed in any intermediary position of the hatch cover ***** Instruction regarding Actuator 2 is relevant for MRH 1120 and MRH 1250 only Connection of actuator`s internal floating limit switches i
MRH 18.08.
Appendix 6: Bridging at MRH 1120÷1250 Improvement at power supplies 230VAC MRH 1120÷1250 (2 power supplies each MRH) To avoid start delays between both actuators at deliveries after 13.04.2021 (serial No. > 46700) following change was introduced at control box. The parallel connection of power supplies on the secondary side (24V output) has been shown to be a significant improvement in operational reliability. In case of failure one of the relays or power supplies the basic functionality remains.
Appendix 7: Connection of actuators to 230VAC NOTE This chapter is intended for future use. Consult Systemair support. Power supply MRH 400÷1000 230VAC and Power supply MRH 1120÷1250 230VAC are pre-mounted to control via 230VAC (50/60 Hz) the position of hatch of MRH hatch. Inside control box there are also terminals for monitoring the position of the hatch and service switch. Product must be protected from direct influence of precipitation. Temperature of ambient without switching: -40 ÷ 55°C, IP 65.
Description Mark Function PE PE BU N – neutral BN L1 – live 1, 230 VAC: OPEN BE L2 – live 2, 230 VAC: CLOSE 5 NC com 6 NC 7 NO 8 NO com Mains power supply 220-240 VAC** NO and NC information about actuators position of Service switch for monitoring purpose *** Actuator 1 – position information - internal floating limit switch **** (hatch position information) drawn position “CLOSED” Actuator 2 (only MRH 1120, 1250) – position information - internal floating limit switch ***** (hatch pos
**** Circuit diagram: drawn position “CLOSED” (Potential free NC contacts, load capacity 24VDC/1A) Connection of actuator`s internal floating limit switches in the control box (1 actuator up to MRH 1000) 9-10 opened, 10-11 closed in closed hatch position 9-10 closed, 10-11 opened in opened hatch position 9-10 closed, 10-11 closed in any intermediary position of the hatch cover ***** Instruction regarding actuator 2 is relevant for MRH 1120 and MRH 1250 only Connection of actuator`s internal floating limit s
MRH 18.08.
MRH 18.08.
Appendix 8: Mechanical hazards, safety warnings DANGER Hazard from touching impeller, if not covered with protective grid! The outlet protective grid is serially provided. DANGER Hazard from crushing/shearing by the hatch cover! The hatch cover can be stopped in any position by turning the actuator`s service switch to middle (0) position. Alternatively in case of pre-mounted Power supply MRH 230VAC MRH 18.08.
Appendix 9: EU-Declaration of Conformity The Manufacturer: Systemair d.o.o. Špelina 2, SI-2000 Maribor Tel.
Appendix 10: UKCA-Declaration of Conformity The Manufacturer: Systemair d.o.o. Špelina 2, SI-2000 Maribor Tel.
