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Unit heater LH
Unit heater LH
The casing is made from a sectional frame with galvanized profiles and sheet steel panels. It includes an intake nozzle and adjustable discharge louvre. The axial fan has an aluminum impeller and steel hub, driven by low-noise, maintenance-free motors suitable for various positions, with overheating protection and a temperature range of -20°C to +40°C.
Available in copper-aluminum or galvanized steel, suitable for LPHW, MPHW, or steam, with threaded and flange connections. The electric heating coil includes a high-limit lockout and requires specific air volumes to prevent overheating.
Details for LH models (25, 40, 63, 100) include motor output, current consumption, air volume, and sound pressure levels, along with heat exchanger connections and heating output stages.
Designed for explosion-proof environments (Ex-zone 2), featuring a fan-motor assembly with an aluminum impeller and plastic edges, suitable for wall or ceiling installation with fresh, return, or mixed air. Accessories include an explosion-proof ATEX-terminal box and a thermistor triggering unit.
Overview of controllers, switching options, and accessories such as shut-off sets, fastening accessories, and discharge accessories. Includes advice on induction louvre consulting and intake accessories.
Guidelines for installation, configuration, and electrical connections, with examples and notes on configuration. Includes information on weights and descriptions of the units.
Operating voltage: 3 x 400 V, Control voltage: 230 V, Switching capacity: Max. 3 kW, Weight: 0.6 kg, Degree of protection: IP 55. Part numbers: Without explosion-proof switch - 79 65 030, With explosion-proof switch - 27 39 000.
Automatic 2-stage control of unit heaters with a 2-stage room thermostat or timer, selecting speed 0, 1, or 2 based on heating requirements.
3-stage switch D 3-4 for three-speed control with full motor protection. 5-stage switch D 5-... for five-stage control with full motor protection, available in various types.
Stepless actuator for fresh air/return air dampers, operates with A1 automatic relay. OPEN/CLOSED actuator for fresh air damper operation with A1 automatic relay.
A1 automatic relay controls fresh air damper with OPEN/CLOSED actuator. A1S automatic relay includes position controller for fresh air/return air dampers with stepless actuator.
Room thermostat timer with weekly programming, temperature range 5-40°C, degree of protection IP 20. Room thermostat with 2-stage control suitable for A2 controller, temperature range 5-30°C, degree of protection IP 30. Industrial version with metal housing, temperature range 0-35°C, degree of protection IP 54.
Shuts down unit heater if air outlet temperature drops below preset value to prevent frost damage.
Configuration A: Heating and ventilating in return air mode without damper actuator. Configuration B: Mixed air mode with stepless damper actuator for variable fresh air/return air mix. Configuration C: Continuous operation with stepless damper actuator and room temperature control.
Pre-configured system for control and monitoring in ventilation systems, with communication capabilities for mobile networks.
Consists of a general controller and unit heaters with master modules, connected via a two-wire bus (ebus). Up to 32 unit heaters can be integrated.
Two-shell casing with protection class IP30, keyboard with 10 functional keys, and illuminated 4-line LCD display. Allows connection for external sensors and room temperature sensors.
Supports progressive or 2-speed control of fan-motor assemblies, various operating modes, and control of up to 8 temperature zones with programmable on/off times.
ISDN-Interface for service SMS, radio clock module for time synchronization, radio remote control for fan speed modification.
Managed via fan speed or mixing valve, with low fan noise and full motor protection. Offers different fan capacity variations through master modules.
Available for different voltage and control types, allowing for mixed air operation and specific fan/motor variations. System can be expanded with additional modules and accessories.
Selection of unit size, heat exchanger type, and fan motor is required. Installation kits and accessories are available for system customization.
Guidance on horizontal and vertical air throws for different unit sizes, with examples and calculations for effective air volume and heating output.
Lists part numbers for general controllers, master modules, group modules, and various accessories. Includes details on electrical connections and special drives for unit heaters.
Detailed specifications for LH unit heaters, including air resistance, sound pressure levels, and speed settings for various models. Includes tables showing performance metrics such as sound power and pressure levels at different speeds and configurations.
Guidelines for installation and configuration of unit heaters, with recommendations for ensuring warm air is not directed at people, maintaining specific distances between units, and using appropriate discharge accessories.
Suggests calculating heat requirements according to DIN 4701 standards, with correction factors for different building materials and configurations.
Lists accessories for optimizing air distribution, including discharge nozzles, cones, and louvres. Details options for explosion-proof designs and different motor configurations.
Illustrates optimal positioning of unit heaters for efficient air circulation and temperature distribution, emphasizing the use of multiple smaller units for uniform heating.
Provides weights for different unit types and accessories, along with dimensions for installation planning.
Includes air volume, heating output, motor speed, and operating voltage. Outlines construction materials and protection classes for various components.
Outlines installation of LH-Units on various bars and surfaces, specifying the use of galvanized sheet steel and options for inclination equalization.
Details various electrical accessories for fan operation, including single-stage, two-stage, three-stage, and five-stage switches, with descriptions of maximum current, operating voltage, control voltage, degree of protection, and dimensions.
LH/LH-ATEX units come with electrical accessories, including automatic controllers, explosion-proof switches, terminal boxes, and thermostats, designed for specific operational needs.
Describes the DigiPro control system, including general controllers, master modules, group modules, and additional modules for temperature zone management, with accessories for enhanced system communication and synchronization.
Details various sensors and thermostats, including room and ceiling temperature sensors, antifreeze thermostats, and differential pressure gauges, essential for maintaining optimal environmental conditions.
Concludes with contact information for Wolf GmbH, the manufacturer, and notes that specifications are subject to change.
Catalog excerpts
Direct fastening onhorizontal steel bardirect fastening oninclined steel barIndirect fastening onhorizontal steel bar >
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Operating voltage230 VCurrent max.10 A Degree of protectionIP 20 Part.No.27 01 063 closeopen Actuator open- closed 230V induction louvre surface/concealedtype switchauxiliaryclamp on site closeopen >
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*Jumper as per motor rating plateRoom thermostat **No jumper withroom thermostat for single-speed (on/off) control of one or moreunit heaters with full motor protection. Automatic start-up when winding temperaturedrops (motor). > Operating voltage400 VControl voltage230 V Leistung max.3 kW Weight0,9 kg Degree of protectionIP 54 Part.No.79 40 001 1) TK/11-12 for two-speed control of one or more unitheaters with full motor protection. Automatic start-up when winding temperaturedrops (motor). > Operating voltage400 VControl voltage230 V Switching capacity, max.4 kW Weight0,9 kg Degree of protectionIP...
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Notice: Max. cable length 3m from unit to control. Longer distances on request. Control type notpossible with electric heating coils.The control DigiPro provides a completely configurated system ready for connection, suitable forcontrol and monitoring functions in ventilation systems. The minimum assembly consists of a general controller and a unit heater with a master module. The components are connected by means of a two-wire bus (ebus). It is possible to integrate up to 32 unit heaters (furnished with either a master module or a group module) into the bus system. > GeneralcontrollerUnit heatermaster...
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An LH-master unit with a master module may be extended by max. up to 5 pcs. LH-slave units provided with a group module each to a system, consisting of 6 LH units. It has to be secured, that the max. nominal capacity of the master module is not exceeded. Mains supply and motor supply of the single group modules are provided by the master module. Group module Electrical connections on the LH-unit are internally wired and the group modules GME, GMZ, GMD are configured for mixed air operationē.3 different fan/motor vvariations may be selected:a) Group module GUE, GME for 230V~/2,2 kW progressiveb)...
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Radio outside sensorRadio outsidesensor receiver SMS alarmISDN-Interface Wolf Service interface RS232 eBuseBus Radio remote controlRadio clock module >
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with discharge louvres or spread dischargewith discharge louvres or discharge cross LH 25 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 40 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 63 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 100 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) >
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with discharge louvres/wide or spread dischargewith discharge louvres cone/discharge nozzle LH 25 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 40 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 63 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) LH 100 > Air volume (m/h) Air volume (mӳ/h) Air throw (m) Air throw (m) Heat increase (K)Heat increase (K) >
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LH 25 > Air volume (m/h) Air throw (m) Heat increase (K) LH 40 > Air volume (mӳ/h) Air throw (m) Heat increase (K) LH 63 > Air volume (m/h) Air throw (m) Heat increase (K) LH 100 > Air volume (mӳ/h) Air throw (m) Heat increase (K) >
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V= air volumem/hV ExampleAssuming: > B = reference air volumemӳ/hV Conversion: > O = catalogue air volumem/hV 1 Pa = 0,1 mm WS1 kPa = 1000 Pa > eff = effective air volumemӳ/ht > on = air intake temperature Ct LH 100 Type4, t = air discharge temperatureа Ct > on = -5C, LPHW 50/40From performance table on Page 12:(always take figures for high speed, because factors correcting for operation at lower speed are taken into account in the characteristics graph).V > off Aoff = effective air discharge temperatureа C ∆ t > A = air heat increaseK ∆ t > W = temperature difference of waterKW= water flow ratem/hQ=...
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with filter boxand brackets with filter box and brackets > with intake ductfor return air with discharge nozzleand brackets with discharge coneand brackets with weatherproof louvreon mixing box >
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Basic unitsLH 25LH 40LH 63LH 100 LPHWUnit heater,type 1CoAl24324876andUnit heater,type 2CoAl26355182 MPHWUnit heater,type 3CoAl27365284Unit heater,type 4CoAl28385488 Unit heater,type 2Stgalv5380127186Unit heater,type 3StҒgalv6585136212Control system Digi Pro7777SteamUnit heater,type DCoAl35456597ElectricUnit heater6 kW23Unit heater9 kW23on request Unit heater12 kW23 IntakeMixing box26324268Fresh air box15272947 Return air box16283150 Filter box13162037 Intake duct for recirc.34447397 Intake duct: 1 m extra24303644 Rain protection hood13193043 Roof lead-in box22273748 Intake hood25620 Non-return...
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Shut-off set for flow and return, straight way type Shut-off set for flow and return, rectangular type Fastening brackets for wall and ceiling installation of LH-Unit, galvanized sheet steel, Fastening set for the installation of an LH-Unit on a vertical concrete bar, galvanized sheet steel,for LH / LH-ATEX 25 - 40 Fastening set for the installation of an LH-Unit on a vertical concrete bar, galvanized sheet steel,for LH / LH-ATEX 25 - 40 Fastening set for the installation of an LH-Unit on a horizontal or inclined steel bar, without inclination equalization,galvanized sheet steel, fr LH / LH-ATEX...
Open the catalog to page 55
Five-stage switch D5-12 Full motor protection for five-speed fan operation. Max. current 7 A, operating voltage400 V, control voltage 230 V, degree of protection IP 20; dimensions W x H x D: 230 x 310 x 185 mm. > Five-stage switch E5-3 Full motor protection for five-speed fan operation with single-phase a.c. motorMax. current 3 A, operating voltage 230 V, degree of protection IP 40; dimensions B x H x T: 150 x 200 x 175 mm. Five-stage switch E5-7 T Full motor protection for five speed fan operation with single-phase a.c. motorMax current 7 A, operating voltage 230 V, Degree of protection IP 40;...
Open the catalog to page 56All WOLF catalogs and technical brochures
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