installation instructions cuh heavy duty unit heater - LUCKINSlive

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PROPER LOCATION INSTRUCTIONSOnce the total heating load is calculated, the quantityand capacity of the unit heaters must be determined. Alarge number of low-capacity heaters provides moreuniform heat distribution. This is recommended whenthe area will be occupied by a relatively large numberof sedentary personnel, (i.e. working on productionlines and at benches.)A large number of smaller capacity unit heaters tendsto prevent hot drafts, reduces noise levels, andincreases diversity of load to help reduce electricaldemand and operating costs.In warehouses where even heat distribution andconstant temperatures are less important, a smallernumber of high capacity units can be used -- in manycases reducing installation cost. To maintainreasonable heat distribution and reduce severestratification, even in lower bay areas, the total airvolume of the space should pass through the unitheaters about three times per hour.It is important that the rated voltage of the heatingequipment matches the supply voltage. Supply voltagein excess of the heater rated voltage can damageequipment. Supply voltage lower than the rated heatervoltage will decrease heater output as well as run therisk of damaging some components.Horizontal unit heaters are recommended in low bayareas with maximum 5 metre ceilings. These shouldbe concentrated along outside wall or other areas ofgreatest heat loss; spaced to set up a generallycircular air movement, each heater supporting the airstream of the other. Additional vertical down flow unitheaters with appropriate accessory diffusers can belocated to counteract ceiling heat losses (see Figure 1Location charts).GENERAL SAFETY INFORMATION.The heaters should be installed in accordance with thelatest edition of BS7671 :2001 “Requirements forElectrical Installation”To avoid possible electrical shock, be sure theelectrical current is turned off at the main switch priorto wiring or servicing of unit.If the power disconnect is not integral and is out ofsight, lock it in the open position and tag to preventunexpected application of power prior to performingany service or maintenance of the unit.Make certain that the power source conforms to therequirement of your equipment.Check heater voltage and phase on rating label toconfirm that it matches the electric service supplyWiring diagrams of the heater and supply connectionsare permanently attached to the inside of the heateraccess door. All terminals are coded in accordancewith the wiring diagram. Accessory wiring is shown onthe unit wiring diagram and supporting literature..The heater must be mounted at least 2.2 metres abovethe floor to prevent accidental contact with the fanblade which could cause injury. Install unit so there areno obstructions to the intake or discharge. Maintainclearances as shown on Fig.1 & 2.The wall/ceiling mounting structure and anchoringprovisions must be of sufficient strength to support thecombined weight of the heater and mounting bracket.CONTROLOn/off control of the heater and controls such as timeclocks must be connected to the control circuit not themain supply. This is to allow the fan run on device tooperate when the heater has been switched off. Theheater must NOT be switched by breaking the mainsupplyFigure 1 Location InstructionsHHHHHHHHHHVVHEXPOSEDHHHHEXPOSEDPage 2
PRINCIPLES OF OPERATIONUpon a call for heat from the remote low level oroptional unit mounted thermostat, the unit fan motorand heating elements will be energized and remainON until temperature reaches setting of thermostat; atwhich time the heating elements will be de-energized.The fan motor will continue to run and purge theheater casing of residual heat until the setting of fanoverride is reached, then the fan motor will be deenergized.For those units with a factory installed two speed fanswitch, the unit as shipped from the factory is set tolow speed. Customer option to set to high speed. Forthose units available with subdivided circuits, theoptional two stage thermostat will, upon a call forheat, energize fan motor and the first stage heatingelement. Should temperature continue to fall, thethermostat will energize the second stage heatingelement.Upon a rise in temperature towards the setting of thethermostat, the two stages of heating elements shallbe de-energized in reverse sequence.The fan motor shall continue to run and purge theheater casing of residual heat until setting of fanoverride is reached, then the fan motor will be deenergized.The optional unit mounted de-stratification thermostatwill energize the unit heater fan motor upon a rise intemperature above its setting.When the unit mounted stratification thermostat closeson a temperature rise and at the same time the floorthermostat calls for heat, the motor will be energizedimmediately and the heating element will be energized,as previously described.The automatic reset safety high limit shall de-energizethe heating elements and control circuits should thetemperature exceed the setting of this device. The fansafety override will energize the fan motor any time thesetting of this device is exceeded so as to purge heatercasing of excess residual heat.When the fan switch is placed in the ON position (forsummer air circulation), the unit heater fan motor will beenergized.NOTE:The wall thermostat should be set to the OFFposition during this mode of operation (units withcontactors).For thermostats equipped with an integral fan switch,place the switch in the HEAT or AUTO position , foroperation of the fan and elements which will then beunder control of the thermostat as described above.When switch is placed in the OFF position, the unit willbe de-energized. When switch is placed in the FANposition, elements shall be de-energized and fan shallbe immediately energized.SPECIFICATIONHeaterFan motorAir VolMax Mtg Ht (m)ThrowWtCat No kW Volts Phase Amp/phWattrpmm3/hrHorizVertmkgsCUH-03-1CUH-03-3CCUH-05-1CUH-05-3CCUH-07-3CCUH-10-3CCUH-15-3CCUH-20-3CCUH-25-3CCUH-30-3CCUH-40-3C3.33.35.05.07.510.015.020.025.030.040.02304002304004004004004004004004001P3P&N1P3P&N3P&N3P&N3P&N3P&N3P&N3P&N3P&N13.44.520.56.810.213.620.427.234.040.854.46.06.06.06.015.015.038.062.062.062.0186.01550155015501550155015501550155015501550155068068068068011901190187034003400340052002.82.82.82.83.03.03.43.73.73.73.72.82.82.82.83.74.36.16.76.76.17.33.73.73.73.76.76.79.89.813.712.216.71212121223233055555555Page 3
Page 1: Installation InstructionsCUH Heavy
Page 5 and 6: INSTALLATION INSTRUCTIONSTASKMASTER
Page 7 and 8: CUH HEAVY DUTY UNIT HEATERPARTS LIS

installation instructions cuh heavy duty unit heater - LUCKINSlive

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