KCF4-2450-1-S-T - Heating KING - Free user manual and instructions

Product Type	Fan-forced cabinet heater
Model	KCF4-2450-1-S-T
Brand	KING
Power Output	5000 W / 17,000 BTU/h
Voltage Options	208, 240, 277, 480 VAC (configurable)
Phase	Single-phase
Amperage (at 240V)	20.8 A
Cabinet Size	48 inches width
Weight	55 lbs
Number of Fans	4
Fan Power	102 W
Airflow (CFM)	285 CFM
Mounting Type	Surface mount (S suffix)
Built-in Thermostat	1-pole, adjustable 40°F – 90°F (T suffix)
Heating Element	Long-life with aluminum plate fins
Blower Type	Whisper-quiet squirrel cage, permanently lubricated bearings
Clearances	3 ft from front, 6 in from side walls, 1 in from floor, max 2 ft off floor
Warranty	1 year on product, 5 years on heating elements
Maintenance	Seasonal cleaning; KCF units: SAE 20 synthetic oil on motor shaft
Safety	Disconnect power before servicing; keep combustibles away

Frequently Asked Questions - KCF4-2450-1-S-T KING

What voltage does the KCF4-2450-1-S-T operate on?

The heater can be configured for 208, 240, 277, or 480 VAC. Check the nameplate or your order to confirm the voltage setting.

How do I install the heater?

Turn off power at the main service panel. Mount the heater on the wall using #10 screws, following the clearance requirements (3 ft front, 6 in sides, 1 in above floor, max 2 ft off floor). Connect wiring per the diagram, and ensure proper grounding. Replace the grill and test operation.

What are the clearance requirements?

Keep combustibles at least 3 feet from the front, 6 inches from side walls, and 1 inch from the floor. Do not install more than 2 feet above the floor.

How do I clean the heater?

Disconnect power. Remove the grill (4 screws). Use a soft brush, compressed air, or vacuum to remove dust from heating elements and fan blades. For KCF models, apply a few drops of SAE 20 synthetic oil to the motor shaft. Reattach the grill.

What is the warranty coverage?

The heater is warranted against defects for 1 year from installation. Heating elements are covered for 5 years. The warranty does not cover misuse, improper voltage, or unauthorized alterations.

Can I use a remote thermostat?

Yes, if the heater is ordered with the -RT option (line voltage terminal block) or -RT24 option (24V control). The -T suffix indicates a built-in 1-pole thermostat.

What is the difference between KCC and KCF models?

KCC models are convection-only cabinet heaters (no fan). KCF models are fan-forced with a whisper-quiet squirrel cage blower for better air circulation.

How do I determine the correct circuit breaker size?

Refer to the amperage chart: at 240V single-phase, the heater draws 20.8A. Use a breaker rated at 125% of the full-load current (approximately 26A), so a 30A breaker is typical. Always comply with local codes.

Is the heater suitable for recessed mounting?

The -S suffix indicates surface mount. If recessed mounting is desired, order the -R suffix version. The same model with -R is designed for recessed installation.

What maintenance does the heater require?

Seasonal cleaning of dust and lint from elements and fan blades. KCF models require periodic oiling of the motor shaft with SAE 20 synthetic oil. Keep the area around the heater clear of combustibles.

USER MANUAL KCF4-2450-1-S-T KING

SAVE THESE INSTRUCTIONS

for KCC & KCF SERIES CABINET HEATERS

Exterior view of a metallic industrial ventilation unit with multiple slatted ventilation slots (no text or symbols visible)

WARNING

THIS UNIT IS MANUFACTURED TO OPERATE ON A SPECIFIC CONTROL VOLTAGE IN COMPLIANCE WITH YOUR ORDER. STANDARD CONTROL VOLTAGES ARE 208 / 240 / 277 FOR 208 / 240 / 277 VOLT HEATERS. 24 VOLT CONTROL IS STANDARD ON 480 VOLT HEATERS. 208 / 240 OR 277 VOLT HEATERS MAY ALSO BE ORDERED WITH AN OPTIONAL 24 VOLT CONTROL. IT IS IMPORTANT THAT YOU VERIFY YOUR POWER SUPPLY VOLTAGE WITH THE HEATER THAT YOU HAVE CHOSEN. IMPROPER INSTALLATION OR FAILURE TO FOLLOW THE PROCEDURES AS OUTLINED IN THIS MANUAL CAN RESULT IN SERIOUS ELECTRICAL SHOCK. DISCONNECT ALL POWER FROM THE HEATERTATE MAIN SERVICE PANEL AND LOCK BEFORE ATTEMPTING TO INSTALL OR SERVICE THIS UNIT. ALL ELECTRICAL WIRING MUST CONFORM TO LOCAL ELECTRICAL CODES. HEATER CIRCUIT MUST BE PROTECTED WITH THE PROPER SIZE FUSES OR CIRCUIT BREAKERS.

Congratulations on the purchase of your new KING ELECTRICAL CABINET WALL HEATER. Your new heater has been designed and built to withstand heavy-duty commercial and institutional usage. KCF models feature a whisper-quiet squirrel cage blower, with permanently lubricated bearings. Both models feature long-life heating elements with aluminum plate fins for rapid heat transfer. A variety of factory installed options allow this heater to be tailored to your specific application.

Installation Instructions

WARNING

Before proceeding further with the installation of this heater, turn off the power and lock to the supply line for the heater at the main service box.

Clearances: CAUTION - High temperature, risk of fire, keep electrical cords, drapery, furnishings, and other combustibles at least 3 feet (0.9 m) from the front of the heater and away from the side and rear.

Unit cannot be installed greater than 2' off the floor.

Do Not Install Less Than 6" From Vertical Side Walls.

Do Not Install Less Than 1 in. Above Floor.

Remove the heater from the box and check for any damage. Verify that the factory installed options are correct for the application. Remove and set aside the grill.

Select power supply wire type and size to comply with local and national electric codes using heater rating given in table. Connect wire to heater as shown in wiring diagram attached to cover. Remove one of the knockouts from back of unit. Secure power supply cable with clamps (or run in conduit, if required by local codes). Also run the wiring for a remote thermostat, if required. Connect grounding conductor to the green screw.

Fasten the heater to the wall with #10 screws, as shown in the mounting diagrams. On recess models, be sure to leave enough clearance to install the grill.

Replace the grill. Test the heater for proper operation.

JUNCTION BOX
(Left side wiring only)

Maintenance

WARNING - All Power must be shut off at the main service panel before inspecting or cleaning the heater.

With proper care your electric heater should last a lifetime, however seasonal cleaning is recommended to maintain the efficiency of the heater. To clean the heater remove the four screws that hold the grill in place and remove the grill. Remove dust or lint from the heating elements and the fan blades with a soft brush, compressed air, or a vacuum cleaner. KCF units require a few drops of SAE 20 synthetic oil on the motor shaft. Replace the grill and tighten the screws.

SURFACE MOUNTING

Warranty

All products covered by this instruction sheet are warranted against defects in workmanship and materials for one year from date of installation, except heating elements which are warranted against defects in workmanship and materials for five years from date of installation. 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 cost incurred in the removal or reinstallation or products, including labor costs, and shipping costs incurred to return products to King Manufacturing. King Mfg. will repair or replace, at our option, at no charge to you with return freight paid by King. King Electrical Mfg. shall not be liable for consequential damages arising with respect to the product, whether based upon negligence, tort, strict liability or contract. King Manufacturing can be contacted in Seattle, Washington by phone at [phone], by fax at [phone] or by email at www king-electric.com

KCC SELECTION CHART

(convection cabinet heater)

CATALOG # PHASE WATTS			BTUH (000)	VOLTS	AMPS		CABINET SIZE	WT. (lbs.)
					1-PH 3-PH
KCC2-2020-KCC2-2420-KCC2-2720-KCC2-4820-*	Add Suffix	2000 6.8		208	9.6	5.6	24" 30
				240	8.3	4.8
				277	7.2	N/A
				480	4.2	2.4
KCC3-2030-KCC3-2430-KCC3-2730-KCC3-4830-*	1 for Single Phase	3000 10.2		208	14.4	8.3	36" 40
				240	12.5	7.2
				277	10.3	N/A
				480	6.5	3.6
KCC4-2040-KCC4-2440-KCC4-2740-KCC4-4840-*	or 3 for Three Phase	4000 13.6		208	19.2	11.1	48" 50
				240	16.7	9.6
				277	14.4	N/A
				480	8.3	4.8
KCC4-2050-KCC4-2450-KCC4-2750-KCC4-4850-*		5000 17		208	24	13.9	48" 50
				240	20.8	12
				277	18	N/A
				480	10.4	6

* All 480V models require neutral wire for 277V fan motor

KCF SELECTION CHART

(fan-forced cabinet heater)

CATALOG # PHASE WATTS			BTUH(000)	VOLTS	AMPS		CABINETSIZE	WT.(Ibs.)	# OFFANS	FANWATTS	CFM
					1-PH 3-PH
KCF2-2020-KCF2-2420-KCF2-2720-KCF2-4820-*	AddSuffix	2000 6.8		208	9.6	5.6	24" 35 1	34 95
				240	8.3	4.8
				277	7.2	N/A
				480	4.2	2.4
KCF3-2030-KCF3-2430-KCF3-2730-KCF3-4830-*	1forSinglePhase	3000 10.2		208	14.4	8.3	36" 45 2	68 190
				240	12.5	7.2
				277	10.3	N/A
				480	6.5	3.6
KCF4-2040-KCF4-2440-KCF4-2740-KCF4-4840-*	or3forThreePhase	4000 13.6		208	19.2	11.1	48" 55 3	102 285
				240	16.7	9.6
				277	14.4	N/A
				480	8.3	4.8
KCF4-2050-KCF4-2450-KCF4-2750-KCF4-4850-*		5000 17		208	24	13.9	48" 55 4	102 285
				240	20.8	12
				277	18	N/A
				480	10.4	6

* All 480V models require neutral wire for 277V fan motor

FACTORY INSTALLED OPTIONS

ADD SUFFIX	DESCRIPTION
-1 1-Phase (first extension after base model number)
-3 3-Phase (First extension after base model number)
-R Recessed Mounting
-S	Surface Mounting
-SB	Sub floor base, 3" high
-T	1-Pole Built-In Thermostat (40°F - 90°F)
-T2	2-Pole Built-In Thermostat (40°F - 90°F)
-RT	Line Voltage Terminal Block(for wiring to a remote thermostat)
-CX	Power Contactor for 208, 240 & 277V modelsline voltage holding coil
-RT24	Power Contactor and Transformer for 24V control(for wiring to a remote low voltage thermostat)Standard on 480V models
-3PS	3-Position Switch (Heat / Fan / Off)
-DS1	2-Pole Disconnect Switch for 1-Phase Models
-DS3	3-Pole Disconnect Switch for 3-Phase Models

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