Kroll LH Series Technical Manual
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Kroll LH Series Technical Manual

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TECHNICAL WORK SHEET
TECHNICAL MANUAL
Air Heaters
SERIES LH and LH-X

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  • Page 1 TECHNICAL WORK SHEET TECHNICAL MANUAL Air Heaters SERIES LH and LH-X...
  • Page 2 060026-01 / Mai 2021...
  • Page 3 INDEX Page Index Range General Information Important safety regulations Description of unit Product reception Handling and Transport Removing the packaging Identification Overall dimensions and weight Structure Technical data Abbreviation index-caption Air flow Spread sheets capacity Positioning Kit for Shelf installation Vertical fin kit installation Installation the ceiling mounting kit Water coupling dimensions...
  • Page 4 Type Art.no. Art. No. Standard housing Stainless steel housing RAL 7035 LHX... LH... LH/X130 038973-01 038989-01 LH/X230 038975-01 038991-01 LH/X330 038977-01 038993-01 LH/X430 038979-01 038995-01 LH/X530 038981-01 038997-01 LH/X630 038983-01 038999-01 Please read this manual carefully before setting the heater into operation ! This manual is an integral part of the product: always make sure the unit is accompanied by this manual! Modifications are subject to change;...

  • Page 5: General Information

    GENERAL INFORMATION This manual is an integral part of the product: Repair and/or maintenance work must be carried always make sure the unit is accompanied by this out by an Authorised Technical Service or manual so that it can be consulted by the user, personnel qualified as described in this manual.

  • Page 6: Important Safety Regulations

    IMPORTANT SAFETY REGULATIONS Before carrying out any cleaning and/or Do not place any objects on the unit or insert any maintenance work on the unit always disconnect objects through the cover grating. the unit from the mains power supply by turning the main switch to OFF.

  • Page 7: Handling And Transport

    HANDLING AND TRANSPORT Handling must be done by properly equipped personnel. All Units types LH/X630 are packaged in a cardboard equipment must be suitable to handle the weight of the unit. case with a wooden base. Raise the case with a Unit types LH/X 130- 530 are packaged in a cardboard case fork-lift truck by inserting the forks in the special with handles to aid transport.

  • Page 8: Overall Dimensions And Weight

    IDENTIFICATION If the plaque is damaged or lost request a The water-fed fan heateres are to be identified as follows: duplicate from an Authorised Technical Service. The TECHNICAL DATA plaque has to be on the rear of the unit. OVERALL DIMENSIONS AND WEIGHT TYPE LH/LH-X Ø...
  • Page 9 STRUCTURE Structure of heater types LH/X 130-530 Structure of heater types LH/X 630 Heat exchanger Cu/Al Fixing part Side panel, left Fixing plate Side panel, right Fan (s) Upper – lower panel Outflow grating Internal part...

  • Page 10: Technical Data

    TECHNICAL DATA U/min’ kcal/h m3/h °C Liter/h V / Hz MAX MED MIN 130 17,3 14900 1550 1020 0,34 230 23,8 20450 2300 1401 0,38 330 35,4 31300 3400 2141 0,58 430 42,7 36750 3900 2514 0,90 530 52,4 45100 4900 3086 0,95...
  • Page 11 Abbreviation index – caption Water intake temperature Thermal output Water outlet temperature Electrical current Air intake temperature dB(A) Noise level Air outlet temperature Water flow rate ∆p Size Water side head loss Air flow rate = Water flow rate [m³/h] 0,86 x Q = Heating capacity [kW] Ä...
  • Page 12 LH 130 Max fan speed Med fan speed Min.fan speed Air flow rate m³/h 1.550 1.150 700 – 900 - 1400 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. Max. 0,34 current Weight 18,2 Water flow rate Connection inch Noise level dB(A)
  • Page 13 LH 230 Max fan speed Med. fan speed Min. fan speed Air flow rate m³/h 2.300 1.850 1.550 700 – 900 - 1400 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. current Max. 0,38 Weight Water flow rate Connection inch Noise level...
  • Page 14 LH330 Max. fan speed Med. fan speed Min. fan speed Air flow rate m³/h 3.400 2.000 1.350 700 – 900 - 1400 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. current Max. 0,58 Weight Water flow rate 12,2 Connection inch Noise level...
  • Page 15 LH430 Max. fan speed Med. fan speed Min. fan speed Air flow rate m³/h 2.650 700 – 900 – 1400 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. current Max. 0,90 Weight Water flow rate 14,2 Connection inch Noise level dB(A) Δ...
  • Page 16 LH 530 Max. fan speed Med. fan speed Min. fan speed Air flow rate m³/h 4.900 3.150 2.200 700 – 900 - 1400 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. current Max. 1,95 Weight 35,7 Water flow rate 16,2 Connection inch...
  • Page 17 LH 630 Max. fan speed Med. fan speed Air flow rate m³/h 6.700 4.250 700 – 900 Fan speed rpm 1/min Electrical power Electr.power supply Max. electr. current Max. 1,04 Weight 44,4 Water flow rate 18,5 Connection inch 1¼ Noise level dB(A) Δ...
  • Page 18 POSITIONING For porper installation always observe the following minimum The heater installation point must be selected by the requisites: planner or a person qualified to handle such matters: all • Position the unit on a dry level surface capable of sustaining ist technical requirements, standards and laws in force must weight;...
  • Page 19 KIT FOR SHELF INSTALLATION The shelves can be mounted either above or beneath the unit depending on installation requirement. To assemble, proceed as follows: • Drill holes in the walls as per the template;. • Attach the shelves to the walls using suitable fixing items (not supplied). •...
  • Page 20 Drilling Template with shelves applied over heater unit LH/X The diameter of shelf plate fixing holes is 12mm. WARNING ! The support shelves are siezed to support one heater It is forbidden to climb up on the shelves unit only. The Manufacturer cannot be held liable for any damages, that may result from imporper attachment of the shelves to the wall.
  • Page 21 VERTICAL FIN KIT INSTALLATION To install the VERTICAL FIN KIT proceed as follows: • Change the position of the fins in order to ease the unscrewing of the fin kit (1). • Unscrew the fixing bolts of the fin kit (2). •...

  • Page 22: Water Circuit Diagram

    WATER COUPLING DIMENSIONS The unit is assembled in the factory with the water connection souplings on the left (as seen from the air outflow grating). Water outlet Water inlet Type Ø 1¼ 1¼ inch Connection For optimum performance it is essential that the water inlet-outlet directions always be observed as indicated by the adhesive label WATER CIRCUIT DIAGRAM outlet...

  • Page 23: Hydraulic Connections

    INVERTING THE HYDRAULIC CONNECTIONS To switch the water connections from one side to the other proceed as follows: • Turn the fins in order to ease the screwing of the fin frames (1). • Loose the bolts and remove them (2). •...

  • Page 25: Electrical Connections

    For the connections: • • Take off the plastic protection cap from the hydraulic connections • Connect the unit according to the plan on page 40. In order to avoid damages to the unit, the lock screw must be held up with an additional wrench for connecting the air heater.
  • Page 26 Chart for the dimensions of the supply line Cable cross- Max. input Fuse section Type Supply Max. input Fuse power (line + earth) protection LH/X voltage (V/ electicity protection ph/Hz) 230V  50Hz 0,34 230V  50Hz 0,38 230V  50Hz 0,58 230V ...
  • Page 27 WIRING DIAGRAM TYPES LH/X 630 ((lower revolution speed) (tri- phase 400V ~ 50Hz 3N) Key: FAN1 axial fan thermic protection axial fan 400V/50Hz/3N tri-phase power supply contactor minimum thermostat room thermostat motor protection switch (1) Not included in the delivery, must be mounted by the installer.
  • Page 28 WIRING CONNECTION DIAGRAM TYPES LH/X 630 ( TRIANGLE ) (tri-phase 400V ~ 50Hz 3N) Key: FAN1 axial fan 400V 50Hz 3N tri-phase power supply contactor room thermostat motor protection switch (1) Not included in the delivery, must be mounted by the installer. MOTOR- WINDINGS ELECTRICAL PLAN (For version with tri-phase 400V ~ 50Hz 3N) VERDE...
  • Page 29 WIRING CONNECTION DIAGRAM TYPES LH/X 620 - 930 ( STAR ) For version with 2 fans and derivation box (tri-phase 400V ~ 50Hz 3N) Key: Cable colours plan: Name Cable colour Black FAN1 Electric fan Brown FAN2 Electric fan Blue N.C.
  • Page 30 WIRING CONNECTION DIAGRAM TYPES LH/X 630 ( TRIANGLE ) For version with 2 fans and derivation box (tri-phase 400V ~ 50Hz 3N) Key: Cable colours plan: Name Cable colour Black FAN1 Electric fan Brown FAN2 Electric fan Blue Connecting terminal for derivation box Green N.C.
  • Page 31 step commutator DST1 Article-No. 022071 Overload cut-out (inherent protection) for 1-step ventilator operating max.heating capacity output 3 kW Operational power supply 400 V Control power supply 230 V Protection rating IP 54 Dimensions WxHXD:110x180x115mm Weight 0,73 kg No warranty on motor without overload cut-out ! Installations are to be executed observing all legal reglementation.
  • Page 32 Five-step-switch Five-step-switch DST 5 - 2 DST 5 - 4 DST 5 - 7 DST 5 - 10 Art.-no. 022074 022075 022076 022077 Overload cut-out (inherent-protection) für 5-step-ventilation max. capacity Operational power supply Control power supply Protection IP20 Dimension BxHxT 230x310x190 Weight...
  • Page 33 Roomthermostat - RT Article-No. 006859 In plastic housing 71 x 71 x 30 mm For mounting after finery. Switching capacity Heating 10 (4)A. Temperature range 6 - 30 °C Switching difference 0,5 K Protection rating IP 30 Roomthermostat - RTI Industrial version Article-No.
  • Page 34 Day-/ Night regulation RTA Article-no. 006708 in plastic housing for night reduction with digital times, power reserve, daily and weekly programmation, 1 sensor for wall-mounting included. Range of setting 0 - 35°C Power reserve 100 hours Protection rating IP 54 Switching difference 0,2 - 1,2 K Switching capacity...
  • Page 35 FILLING – EMPTYING THE UNIT • FILLING: Repeat the procedure after the heater has been running a few hours. Before starting filling: • Position the main switch to OFF • Check that there are no leaks. • Check that the water system drain vlave is closed. •...
  • Page 36 CONNECTING HEATING INSTALLATION Water outlet Connecting warm-water heating system Before connecting to existing heating system, make sure, that the respective demands of power, specific for each unit, are available at any time. Water connection of the unit has to be effected by means of Air entrance appropriate socket-unions and stop-valves at water entrance and outlet.

  • Page 37: First-Time Startup

    FIN ADJUSTMENT The zorizontal fins must be adjusted during installation so as to create an airflow suitable for the room/ area being heated. Such airflow must not distrub the persons occupying such room/area. The fins can be individually adjusted manually. Likewise, vertical fins must also be adjusted (where fitted).

  • Page 38: Setting Into Operation

    CHECKS DURING AND AFTER FIRST-TIME START- UP  Once the fan heater has been started check that it shuts Check that electrical absorption is less than down on reaching the required temperature and then restarts indicated in the TECHNICAL DATA chapter. ...
  • Page 39 DURING FIRST-TIME START-UP DURING FIRST-TIME START-UP Check correct mechanical mounting. During first-time start-up, the correct function and setting of all regulations, control and security units have to be checked. Check correct connection to existing heating system. Measure electrical absorption of the ventilator. Check that hot surfaces are protected against Nominal current must not exceed the value unintended touch.

  • Page 40: Maintenance

    MAINTENANCE CLEANING THE HELICAL FAN Periodic maintenance is essential for the safety, efficeieny and long-term performance of the unit. Before doing any maintenance work: Remove any dust and/or foreign objects that may have dposited on the fan and/or grating with compressed air. •...

  • Page 41: Troubleshooting

    TROUBLESHOOTING PROBLEM CAUSE SOLUTION No power Check unit is powered The fan does not start Main switch turned to OFF Turn to ON Room thermostat faulty Check room thermostat Fan faulty Check fan motor Condenser faulty Check condenser Overload cut-out tripped Check absorption Poor heating efficiency Heat exchanger dirty...
  • Page 43 Maintenances Wartungsintervalle / Servicing intervals / Intervalles de maintenance Tag der Wartung Name Bemerkungen Day of servicing Name Notes Jour de maintenance Notes...
  • Page 44 версии, поставленной изготовителем, приводит к тому, что любые гарантии теряют силу. Кроме того, действуют наши „Условия продаж и поставки“. В изделие могут без уведомления вноситься технические модификации, направленные на усовершенствование изделия. Kroll Energy GmbH Eduard-Breuninger-Straße 67 D-71522 Backnang Telefon: +49 (0)7191 / 9070 200...

This manual is also suitable for:

Lh-x series

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