Installation - King Electric
Contents
1. 8 Fan Relay Heavy duty dual speed fan relay may be ordered with furnaces for air conditioning or summer fan 2 Limit Control Integral automatic high temperature limit control in each heating element bank prevents the delivery of air at unsafe temperatures 20 35KW also use a manual reset limit control to completely shut the furnace off should an overtemperature condition occur Jumper Bar for circuit breaker 7 Terminal Block For Field Wiring Optional Special Order KFSTB 3 Overcurrent Protection 60 Amp Circuit breakers may be built in to comply with code requirements and offer ultimate safety in overcurrent protection Front mounted for easy reset Multiple circuits or single power source options 11 Motor 4 KF Series has terminal block Long life thermally protected permanently only used when total current lubricated direct drive motor no belts to is under 48 amps See item 7 adjust or slip This low noise three speed motor is designed for use with air conditioning capability as well as heating 14 Air Filter Convenient access for replacement 12 Capacitor of standard 16 x 20 x 1 filter ITEM PARTNUMBER DESCRIPTION 21 2405 00 Heating Element 5 kW 240V 21 2405 07 Heating Element 5 kW 208V 21 2405 9 Heating Element 5 kW 480V 21 2405 2 Heating Element 5 75 kW 240V 21 2405 12 Heating Element 5 75 kW 240V 21 2405 1 Heating Element 4 kW 240V2. has a buzzing sound e Low voltage transformer Replace or tighten when not in use defective or loose e Defective sequencer e Replace Unit continues to heat after e Defective thermostat e Replace room is up to set temperature e Thermostat wires to ground e Repair does not shut off e Motor wires to ground e Repair e Thermostat accidentally shorted e Replace amp contacts are welded Make sure all connections are tight e Repair e Reset e Replace e Repair or replace e Reset e Check the power source Unit will not start e Dirty air filter Unit goes off on high limit Defective sequencer e Defective limit control e Power failure 2007 KFUH indd 3 08 Mobile Home Bracket A ia Optional Unique Fan Orifice KFS MB Louver directs air over all heating elements and sidewalls evenly insuring longer life performance No insulation necessary 9 Low Voltage Terminal Block 5 Transformer Each furnace is equipped with a heavy 7S duty low voltage 24 volt transformer for the thermostat control circuit 6 Contactor or 7 Manual Reset Time Delay Sequencer Actuates heating element banks at ZY random intervals to minimize electrical RS l surges in compliance with EEI Y and NEMA standards 1 Heating Elements Quick heating long life nichrome elements are sized to provide proper watt density for maximum heat dissipation by fan forced air convection currents
3. 21 2405 6 Heating Element 4 kW 480V 21 3413 00 Heating Element 3 Ph 5 kW 240V 21 3413 01 Heating Element 3 Ph 5 kW 480V 60711 201936 Auto Limit Control 60711 QOU260 Circuit Breaker 60 Amp 1 Ph Square D QOU360 Circuit Breaker 60 Amp 1 Ph Square D EB 200 nput Terminal Block 1 Ph 2P 240V ED 2 nput Terminal Block 1 Ph 2P 480V ERB 201 nput Terminal Block 3 Ph 3P 240V ED 3 Input Terminal Block 3 Ph 3P 480V 4000 09 E07K999_ Low Volt Transformer 240 208 4000 03 E07J999 Low Volt Transformer 277 24 4000 04 E07K999 Low Volt Transformer 480 24 Sequencer used prior to 1981 anual Reset Limit Manual Reset Button Capacitor 3MP 370V Capacitor 7 5MF 370V Capacitor 10MF 370V Blower Small for 1 5 HP Motors 13 Blower Large for 1 3 1 2 HP Motors Blower X Large for 1 2 HP Motors E S terri 2007 KFUH indd 3 08 21 2405 00 20240507 2124059 212405 2 21 2405 12 2124051 212405 6 213413 0 21 3413 01 _ 2 60711 201936 O m EB 200 e ERB 201 PED 4000 09 E07K999 4000 03 07999 _ 4000 04 07K999
4. 8 threaded rod A minimum of 6 inches clearance to vertical and horizontal surfaces and 6 feet minimum above floor are required Louvers can be adjusted for desired airflow Application Tips First calculate the heating loads in the con ventional way using the N E M A handbook or ASHRAE guide Next determine quantity and size of heaters to be used In instances where large groups of people are normally settled in the same location use a large number of smaller kW unit heaters Example people on a production line or skilled machine opera tions By utilizing heaters in this manner one can best distribute uniform heat prevent hot drafts reduce potential noise levels and bal ance the electrical operating demand When considering warehouse areas or storage rooms where heat distribution and constant temperatures are less important use fewer heaters of higher capacity To maintain uniform heat and reduce strati fied air it is recommended that the total CFM of the units turn the air over approximately 3 times per hour Horizontal Mount Smaller rooms can be heated by one unit heater Where two walls are exposed heaters should be mounted as shown In larger rooms units should be located so their air streams wipe exposed walls without Ceilings under 12 feet HORIZONTAL FLOW CEILING MOUNTED Adustable Louvers Ceilings over 12 feet VERTICAL FLOW WALL OR POST MOUNTED blowing at them Units should be located so th
5. SAVE THESE INSTRUCTIONS KFUH Electric Unit Heater Installation Instructions Gi A DANG ER WARNING RISK OF ELECTRIC SHOCK CAN CAUSE INJURY OR DEATH DISCONNECT ALL REMOTE ELEC SHOCK HAZARD Shut off circuit breaker now TRIC POWER SUPPLIES BEFORE SERVICING CAUTION Turn off power source supplying the heater before attempting installation maintenance or repairs Lock or tag circuit breaker or fuse panel door Failure to do so could result in serious electrical shock burns or possible death It is extremely important you verify the electrical power supply is the same voltage as the heater being installed 240 and 480 Volt heaters are not interchangeable Powering a 480 Volt unit with 240 Volt supply wires will reduce the heater output by approximately 75 and is never recommended Powering a 240 Volt unit with 480 Volt supply wires will destroy the heater and voids all warranties CHECK Ensure blower wheel is free turning and that element assemblies are in place Be sure filter is in proper position and not torn or damaged Check that blower housing and motor have not separated from element compartment during shipment FIELD WIRING 208 and 240 Volt heaters are equipped with circuit breakers over 48 Amps to provide internal circuit protection and a field disconnect on the unit A terminal block provides a single strike for field wiring 480 Volt units do not have circuit breakers but are fused when internal protection is required
6. The finish is not intended for direct salt spray exposure in marine applications or the highly corrosive atmospheres of swimming pools chemical storage bins etc Please refer to the factory for explosion proof or marine application heater information Do not install unit heaters above recom mended maximum mounting height Obstruc tions must not block unit heater air inlet or discharge To prevent possible injury heaters must be mounted at least 6 feet above the floor to prevent accidental contact with the heating element or fan blade AIR DELIVERY CHART 2 static 380 460 19 Wire Color Re Bue Air Volume Cubic Feet per Minute CFM Air Velocity Feet per Minute FPM 1 Pole thermostat factory installed l TS F 283 2 Stage thermostat factory installed 2 Stage control 3 Phase models 2 Summer fan switch factory installed 2 7 ND No diffuser 1 duct collar provided on discharge i side for connection to 14 x 14 duct 2007 KFUH indd 3 08 CONTROL WIRING Connect thermostat to terminals R and W for heating R and G for air only This can be done with a single stage heat cool thermostat or a single stage heat only thermostat and a separate fan only switch to control the fan relay optional installed on furnaces Some models of furnace have two stage operation optional and are provided with terminals W1 and W2 Ifa single stage thermostat is used it should be connected to terminals R and W1
7. and are also supplied with terminal blocks for field wiring Consult the National Electric Code for proper wire size and service circuit breaker protection Terminal Block 1 Phase and 3 Phase Furnace Low Voltage Terminal Block Low Voltage Thermostat Transformer ojojo p caticades 1 i R i a O a a E RH 240VAC 1 w 60 A 1 Jote We E E eee ee k L6 mp 4 T O w Heat Relays es er a Circuit Breaker 1 1 G 1 Oa pke OH 240VAC 1 O Fan Only Relays To Limit Controls 1 1 Y L4 60 Amp and ose Circuit Breaker ee Heater Elements 1 ae eee O O E 1 I 1 1 240VAC i i Thermostat Control Wiring diagram 1 1 60A 1 1 for use with electric furnaces and a Sieu E Eaker 1 1 showing cooling coil relay hook up r 1 I Le Ni a a a a a d Cooling Coil Relay provided by others Electronic Air Cleaner Wiring diagram for use with electric furnaces and utilizing an airflow interlock switch 37 e 19 gt 5 e 20 H center to center center to center lt Mounting gt 0 lt Mounting _ gt NZ0O nNZ2ZMSE 0 Filter 2007 KFUH indd 3 08 King Electrical Mfg Company 9131 10th Avenue South Seattle WA 98108 phone 206 762 0400 fax 206 763 7738 Mounting KFUH heaters can be mounted vertically or horizontally as shown 3 8 weldnuts are weld ed into brackets and will accept 3
8. and a jumper wire installed form terminals W1 to W2 see enclosed control circuit wiring diagram Some models of furnace have the 24 VAC power available between terminal C and R for use with external air conditioning relay option Never short or cross these two terminals The transformer will fail OPERATION When control thermostat is turned up to demand heat the blower and heating elements should be energized Furnaces with sequences installed will have up to 30 seconds delay in start up When turned to cool position heat cool thermostats should bring on the blower only for air only MAINTENANCE CAUTION Disconnect power at the main service panel before inspecting or cleaning this heater Lock or Tag breaker to prevent accidental shock Because of its rugged design superior engineering and quality craftsmanship the King KFUH Unit Heater requires little maintenance With minimum care your electric heater should last a lifetime King recommends changing the air intake filter at least twice a year and checking the motor and blower for excessive dust lint accumulation to maintain the efficiency of the heater While King recommends the filter be changed twice a year your environment may require more frequent changes WARRANTY The King KFUH unit heater is warrantied against defects in workmanship and materials for five years from date of installation Extended warranty applies to heating element only all other components are covered for
9. at the air stream of one supports that of another thus setting up a circulatory air move ment Distance between units to be approxi mately 1 times published air throw Units should not be mounted horizontally in areas having ceiling heights in excess of 10 to 12 feet Vertical Mount exposee Units should be mounted vertically where they may otherwise interfere with assorted material handling equipment and in high bay areas Heaters should be situated to provide free air circulation Size and selection of units should be based on recommended mounting height Unit heaters are frequently used to combat cold air inrush when loading dock doors are opened For such applications one or more units should be arranged to blow warm air vertically in front of opening The following accessories and or options may have been ordered with your unit Model Description 24V Wall Thermostat range 50 90 90 Degree Elbow w adjustable louver diffuser Radial Diffuser 90 Degree Elbow w radial diffuser Kit includes casters and mounting bracket to create a Portable KFUH no power cord KFUH PTBL Dual Mounting t Tt vf fv 4 4 T Where square footage is large and comfort essential both horizontal and vertical installa tions may best serve your requirements Mounting Limitations P Pep h DPOF p 4 4 w A A H KFUH unit heaters should not be used in potentially explosive atmospheres
10. two years This warranty does not apply to damage from accident misuse or alteration nor where the connected voltage is more than 5 above the nameplate voltage nor to equipment improperly installed wired or maintained in violation of this instruction sheet All claims for warranty work must be accompanied by proof of the date of installation The customer shall be responsible for all costs incurred in the removal or reinstallation or products including labor costs and shipping costs incurred to return products to King Manufacturing King will repair or replace at our option at no charge to you with return freight paid by King King shall not be liable for consequential damages arising with respect to the product whether based upon negligence tort strict liability or contract No other written or oral warranty applies nor any warranties by Representatives Dealers Employees of King or any other person King Manufacturing can be contacted in Seattle Washington U S A by phone at 206 762 0400 fax 206 763 7738 or website www king electric com TROUBLESHOOTER TROUBLE POSSIBLE CAUSE REMEDY e Thermostat wire is not connected e Circuit breaker is off e 24 Volt transformer burned out e Wire connection off or there are broken wires e Reset button tripped e Wrong voltage e Replace e Replace e Replace e Reset manual limit push button 20 35 kW units Vibration noise e Blower assembly loose e Secure blower and motor cage Unit
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