K28DSR - Ceiling fan KDK - Free user manual and instructions

Product Type	Ceiling Fan / Axial Flow Fan
Brand	KDK
Model	K28DSR
Power Supply	Single-phase, 220-240V, 50/60Hz
Number of Poles	6
Output Power	10 W
Air Volume (High)	774 m³/h (50Hz), 804 m³/h (60Hz)
Air Volume (Low)	642 m³/h (50Hz), 762 m³/h (60Hz)
Input Power (High)	21 W (50Hz), 24 W (60Hz)
Input Power (Low)	21 W (50Hz), 24 W (60Hz)
Noise Level (Suction Side, High)	39 dB (50Hz), 39.5 dB (60Hz)
Noise Level (Casing Side, High)	48.5 dB (50Hz), 49 dB (60Hz)
Weight	8.0 kg
Dimensions (A x B x C)	350 mm x 197 mm x 22 mm
Dimensions (D x E x F)	248 mm x 400 mm x 366 mm
Dimensions (G x H)	350 mm x 8 mm
Features	Low noise, compact size, axial flow fan
Installation	Indoor use only; avoid high temperature (>40°C), soot, and direct rain/sun; install horizontally; provide air supply port; use motor overload breaker; do not install upside down or vertically
Maintenance	Annual inspection; bearing service life ~20,000 hours; replace bearing if abnormal noise
Safety	Do not supply incorrect voltage; do not repeat start/stop >12 times/day; ensure proper grounding
Spare Parts Availability	Operational parts available for at least 6 years after discontinuation

Frequently Asked Questions - K28DSR KDK

What is the intended use of the KDK K28DSR fan?

The KDK K28DSR is a compact size axial flow fan designed for indoor ventilation. It is suitable for use in ducted systems and provides efficient air movement with low noise levels.

What are the installation requirements for the K28DSR?

Install the fan horizontally in an indoor location away from high temperatures (>40°C), soot, direct rain, and sunlight. Ensure the room has an air supply port, and connect the duct without sharp bends or reduced diameters. Use a motor overload breaker and provide access for maintenance.

How do I wire the K28DSR fan?

Wiring must be done by a qualified electrician following local regulations. For single-phase models, connect power to the terminal block according to the wiring diagram in the manual. For three-phase models, connect R, S, T to the corresponding terminals. Ensure proper grounding.

What is the recommended maintenance schedule?

Perform maintenance inspection and cleaning approximately once a year. Replace the motor bearing if abnormal noise occurs (service life about 20,000 hours). Always turn off power before maintenance.

How do I clean the K28DSR fan?

Disconnect power before cleaning. Remove dust and debris from the fan blades, casing, and duct using a soft brush or vacuum. Do not use water or harsh chemicals. Inspect for any damage or wear.

What should I do if the fan is noisy or vibrates excessively?

Check for poor foundation or faulty installation; reinforce foundation or recheck installation. Ensure no contact between rotating and stationary parts. Inspect for impurities or dust adherence and clean if necessary. Also check ducting for faults.

Can the K28DSR fan be used outdoors?

No, the fan is for indoor use only. Avoid locations exposed to direct sunshine or rain as it may cause malfunction.

What are the motor bearing specifications?

The model K28DSR uses bearing type 6202ZZ (for both sides). The bearing service life is approximately 20,000 hours. Replace if abnormal noise is heard.

How can I obtain spare parts for the fan?

Operational parts are available for at least six years after the model is discontinued. Contact the local dealer or distributor for replacement parts.

Where can I find the wiring diagram for the K28DSR?

The wiring diagram is provided in the user manual. For single-phase models, refer to the diagram showing HI and LO connections. For three-phase models, refer to the diagram with R, S, T terminals.

USER MANUAL K28DSR KDK

K25DSF1	K28DSR	K28DSM	K35DSM	K40DSL
K40DTL	K40DSH	K40DTH	K45DST	K45DTT
K45DSL	K45DTL	K45DTH	K55DTL	K55DTH

Low noise type compact size axial flow fan

K25USF1	K28USR	K28USM	K35USM	K40USL
K40UTL	K40USH	K40UTH	K45UST	K45UTT
K45USL	K45UTL	K45UTH	K55UTL	K55UTH

Line drawing of a mechanical fan or impeller with blades and mounting bracket (no text or symbols)

Compact size axial flow fan

Technical line drawing of a cylindrical mechanical component with flanged ends and mounting brackets (no text or symbols)

Low noise type compact size axial flow fan

Thank you for purchasing the KDK Compact or Low noise type compact size axial flow fans. Please be sure to always follow the details of these instructions in installing and using your unit, otherwise sudden accidents or breakdowns will occur. Hence we strongly urge both the installer and the final user to read these instructions carefully. So that the unit can be used safely throughout its service life.

1. Installation Cautions

- Observe the following precautions as to the place of installation and the installation procedure.

Avoid a location susceptible to high temperatures over 40° degree.(Trouble may be caused and the motor life may be shortened.)	Avoid a location susceptible to too much soot.	Install securely.(Otherwise noise and vibration may be generated.	Install a fan protection device like a motor over load breaker in the wiring.
The room shall have an air supply port for effective ventilation.	Provide an access door for inspection and maintenance.	Do not use the fan in the place where humidity is high.	Never install the fan upside down or vertically.
Connect the duct avoiding the following cases.(1) Sharp bending angle. (2) Bended more than once. (3) Reduced diameter at the connection. (4) Bending near the discharge port or suction port.		When connecting an electric flow rate control unit (inverter, slidac, etc.) be sure to check the safety of the equipment.(The motor may be burned.)	Do not supply power of an incorrect rating.Be careful not to
		The fan is for indoor use.Avoid the location exposed to direct sunshine or rain.	Do not repeat starting and stopping.(Otherwise the fan)may deteriorate.12 times or less per day

2. Names and Dimensions of Components

Compact size axial flow fan

K25DSF1

Dimensions (mm)

No.	Parts name	Q'ty
1	Casing A	1
2	Casing B	1
3	Motor	1
4	Wheel	1
5	Guide vanes	4
6	Hanger fittings	2

Compact size axial flow fan

K28DSR K28DSM K35DSM K40DSL K40DTL K40DSH K40DTH

K45DST K45DTT K45DSL K45DTL K45DTH K55DTL K55DTH

No.	Parts name	Q'ty.
1	Casing A	1
2	Casing B	1
3	Motor	1
4	Wheel	1
5	Guide vanes	7
6	Hanger fittings	4
7	Terminal cover	1

Detail of hanger fittings

Model number	A	B	C	D	E	F	G	H
K28DSR, K28DSM	350	197	22	248	400	366	350	8
K35DSM	410	206	21.5	298	460	426	415	8
K40DSL, K40DTL, K40DSH, K40DTH	480	206	26	347	525	491	480	8
K45DST, K45DTT, K45DSL, K45DTL, K45DTH	540	218	25.5	394	588	554	546	10
K55DTL, K55DTH	680	217	25	445	673	639	631	10

Applied model number

K28DSR K28USR

K28DSM K28USM

K35DSM K35USM

K40DSL K40USL

K40DTL K40UTL

K40DSH K40USH

K40DTH K40UTH

Applied model number

K45DST K45UST

K45DTT K45UTT

K45DSL K45USL

K45DTL K45UTL

K45DTH K45UTH

K55DTL K55UTL

K55DTH K55UTH

Low noise type compact size axial flow fan
Dimensions (mm)
K25USF1

K28USR K28USM K35USM K40USL K40UTL K40USH K40UTH K45UST K45UTT K45USL K45UTL K45UTH K55UTL K55UTH

Dimensions(mm)

Model number	A	B	C	D	E	F	G	H	I	J	K	L
K28USR, K28USM	882	600	77	205	22	30	248	249	400	366	350	8
K35USM	948	606	102	240	21.5	30	298	299	460	426	415	8
K40USL, K40UTL, K40USH, K40UTH	1049	571	137	341	26	30	347	347	525	491	480	8
K45UST, K45UTT, K45USL, K45UTL, K45UTH	1085	494	161	430	25.5	30	394	396	588	554	546	10
K55UTL, K55UTH	1232	413	231	588	25	30	445	447	673	639	631	10

No.	Parts name	Qty.
1	Casing A	1
2	Casing B	1
3	Motor	1
4	Wheel	1
5	Guide vanes	4
6	Hanger fitting	4
7	Sound absorbing material	—
8	Side panel assy	2
9	Duct assy	2

No	Parts name	Qty
1	Fan body	1
2	Motor	1
3	Wheel	1
4	Sound absorbing material	1
5	Duct assy	1
6	Side panel assy	1
7	Cover	1
8	Plastic nvet	+
9	Hanger fittings	4
10	Terminal cover	1

* Plastic rivet Qty.

Model number	Q ty
K28DSR K28USR	8
K28DSM K28USM
K35DSM K35USM
K40DSL K40USL
K40DTL K40UTL
K40DSH K40USH
K40DTH K40UTH
K45DST K45UST	12
K45DTT K45UTT
K45DSL K45USL
K45DTL K45UTL
K45DTH K45UTH
K55DTL K55UTL
K55DTH K55UTH

3. Maintenance Cautions

Perform maintenance inspection and cleaning approximately once a year so that the fan is operated safely for a long time. It is recommended that the maintenance inspection should be conducted by the subcontractor of the electrician to prevent the fan from having any accident due to damaged parts deriving from aging and ensure long life and safe operation of the fan.

3-1 Replacement parts

Motor bearing (Supposed service life-about 20,000 hours)

The bearing service life depends on how it is used.

Renew the bearing every time when an abnormal sound is heard

Model number	D and	Non-D and	Model number	D and	Non-D and
K25DSF1, K25USF1	6200ZZ	6200ZZ	K45DST,K45UST	6205ZZ	6203ZZ
K28DSR, K28USR			K45DTT,K45UTT	6204ZZ
K28DSM, K28USM			K45DSL,K45USL	6206ZZ
K35DSM, K35USM	6202ZZ	6202ZZ	K45DTL,K45UTL	6204ZZ
K40DSL,K40USL			K45DTH,K45UTH
K40DTL,K40UTL			K55DTL,K55UTL	6205ZZ	6204ZZ
K40DSH,K40USH			K55DTH,K55UTH
K40DTH,K40UTH

3-2 Overhauling procedure

When overhauling is necessary, like in the case when the motor has to be changed, observe the following procedure. (Be sure to wear gloves for safety)

graph TD
    A["1. Turn off the power supply switch|breaker|first."] --> B["2. Disconnect the power supply wiring. (There is no connecting terminal to K250SF1 and K25USF1)."]
    B --> C["Disassembly in order"]

1. Disassemble the body into each part.

(Compact size axial flow fan)

|Follow the sequence according to

the number described as below

K2SUSF1 is different from this construction

Applied model number

K28USR K45UST
K28USM K45UTT
K25USM K45USI
K350SM K450SL K40USL K45UTL
K400SL K450TL
K40UTL K45UTH
K40USH K55UTL
K40UTH K55UTH

graph TD
    A["3. Silencer"] --> B["4. Plastic rivet"]
    B --> C["5. Silencer to casing B assy."]
    C --> D["6. Plastic rivet"]
    D --> E["7. Hanger fitting"]

4. After-sale Service

(1) Trouble shooting

Examine the following table to determine and rectify the problem. If the fan still does not work, disconnect power source and contact to the local dealer.

CauseProblem	Inadequate air flow	Excessive noise	Excessive vibration	Overheated motor	Countermeasure
Poor foundation					Reinforce foundation
Faulty installation					Recheck installation
Reverse fan rotation					Change motor wiring
Inadequate fan speed					Check power source
Contact between rotary and stationary parts					Inspection
Impurities sucked in/dust adherence					Inspection/cleaning
Faulty ducting					Duct inspection

(2) Replacement parts kept for at least six years

The company will have available replacement operational parts for the Compact or Low noise type compact size axial flow fans for at least six years after these models are no longer sold. Operational parts refers to those parts which are essential for maintaining the functions of the Product.

(3) Complete after-sale service

If you have any questions about maintenance or other after-sale services, please inquire where you purchased your unit.

5. Specifications

Type	Model number	Power supply	Number of poles	Output (W)	Frequency	Air volume (m3/h)		Input (W)		Noise level (dB)						Weight (kg)
						High	Low	High	Low	Casing side		Suction side		Discharge side
										High	Low	High	Low	High	Low
Compact size axial flow tan	K25DSF1	Single-Phase	4	25	50Hz	600	550	34	25	41	39.5	48	46	48	46	5.0
					60Hz	720	650	40	32	42	41.5	49	48	49	48
	K28DSR	Single-Phase	6	10	50Hz	774	642	21	21	39	36.5	48.5	46	48	45.5	8.0
					60Hz	804	762	24	24	39.5	37.5	49	46.5	48.5	46
	K28DSM	Single-Phase	4	20	50Hz	1194	1050	48	48	44.5	42	54.5	52	54	51.5	8.0
					60Hz	1224	1062	59	55	45.5	43	55.5	53	55	52.5
	K35DSM	Single-Phase	4	60	50Hz	2016	1782	103	66	45.5	43	56.5	54	56	53.5	13.0
					60Hz	2154	1830	144	112	46.5	44	57.5	55	57	54.5
	K40DSL	Single-Phase	4	200	50Hz	2894	2765	226	217	54	52	66	64	65.5	63.5	23.0
					60Hz	3552	3390	240	328	55	53	67	65	66.5	64.5
	K40DTL	Three-Phase	4	200	50Hz	2943	2894	206	196	54	52	66	64	65.5	63.5	20.0
					60Hz	3600	3329	301	288	55	53	67	65	66.5	64.5
	K40DSH	Single-Phase	4	300	50Hz	3978	3146	242	217	55	53	67	65	66.5	64.5	23.0
					60Hz	3960	3774	375	328	56	54	68	66	67.5	65.5
	K40DTH	Three-Phase	4	300	50Hz	3210	2873	249	225	55	53	67	65	66.5	64.5	20.0
					60Hz	3702	3235	351	320	56	54	68	66	67.5	65.5
	K45DST	Single-Phase	4	550	50Hz	4224	4111	418	330	58	57.5	68	67.5	68	67.5	37.0
					60Hz	5613	5131	570	512	60	59.5	70	69.5	70	69.5
	K45DTT	Three-Phase	4	550	50Hz	4154	4088	424	366	58	57.5	68	67.5	68	67.5	37.0
					60Hz	5491	4794	619	553	60	59.5	70	69.5	70	69.5
	K45DSL	Single-Phase	4	700	50Hz	4898	4768	464	367	58.5	58	68	67.5	68	67.5	37.0
					60Hz	6342	5797	631	569	61	60.5	70.5	70	70.5	70
	K45DTL	Three-Phase	4	700	50Hz	4817	4741	479	415	58.5	58	68	67.5	68	67.5	37.0
					60Hz	6204	5416	706	643	61	60.5	70.5	70	70.5	70
	K45DTH	Three-Phase	4	900	50Hz	5454	5250	464	423	59	58.5	68.5	68	68.5	68	37.0
					60Hz	6522	6789	695	652	68	64.5	72.5	72	72.5	72
	K55DTL	Three-Phase	4	1,100	50Hz	-	7414	-	965	-	63	-	75	-	75	49.5
					60Hz	-	8986	-	1469	-	68	-	81	-	81
	K55DTH	Three-Phase	4	1,500	50Hz	8526	8054	1057	998	66	65.5	78	77.5	78	77.5	49.5
					60Hz	10086	9439	1685	1617	70	69.5	82	81.5	82	81.5
Low noise type Compact size axial flow tan	K25USF1	Single-Phase	4	25	50Hz	608	550	47	37.2	38	35	44	41	44	41	11.0
					60Hz	720	650	47	37.9	39	37	45	43.5	45	43.5
	K28USR	Single-Phase	6	10	50Hz	774	642	25	24	33	30	38	36.5	48	45.5	19.5
					60Hz	804	702	28	26	33.5	31.5	38.5	37	48.5	46
	K28USM	Single-Phase	4	20	50Hz	1194	1050	45	42	34.5	32	43	42	54	51.5	20.0
					60Hz	1224	1062	56	51	35.5	34	44	43	55	52.5
	K35USM	Single-Phase	4	60	50Hz	2016	1782	107	105	37.3	35	45.5	44.5	59	53.5	30.0
					60Hz	2154	1830	137	126	38.5	36	46.5	45	57	54.5
	K40USL	Single-Phase	4	200	50Hz	2894	2765	236	208	45	42.5	55	54	65.5	63.5	40.0
					60Hz	3552	3390	299	277	46	44	56	55	66.5	64.5
	K40UTL	Three-Phase	4	200	50Hz	2943	2894	243	223	45	43.5	55	54	65.5	63.5	40.0
					60Hz	3600	3329	336	309	46	45	56	55	66.5	64.5
	K40USH	Single-Phase	4	300	50Hz	3379	3146	323	266	46	42.5	56	55	66.5	64.5	40.0
					60Hz	3960	3774	399	363	47	44	57	56	67.5	65.5
	K40UTH	Three-Phase	4	300	50Hz	3210	2873	281	261	46	43.5	56	55	66.5	64.5	40.0
					60Hz	3702	3235	391	361	47	45	57	56	67.5	65.5
	K45UST	Single-Phase	4	550	50Hz	4224	4111	418	399	52	51.5	58.5	58	68	67.5	50.0
					60Hz	5613	5131	570	612	54	53	60	59.5	70	69.5
	K45UTT	Three-Phase	4	550	50Hz	4154	4088	410	380	52	51.5	58.5	58	68	67.5	50.0
					60Hz	5491	4794	569	565	54	53	69	59.5	70	69.5
	K45USL	Single-Phase	4	700	50Hz	4898	4768	529	485	53.5	53	58.5	58	68	67.5	50.0
					60Hz	6342	5797	788	745	56	55	61	60.5	70.5	70
	K45UTL	Three-Phase	4	700	50Hz	4817	4741	510	468	53.5	53	58.5	58	68	67.5	50.0
					60Hz	6204	5416	734	684	56	54	61	60.5	70.5	70
	K45UTH	Three-Phase	4	900	50Hz	5454	5250	535	489	53	52	58	57.5	68.5	68	50.0
					60Hz	6522	5789	811	763	57	56	62	61.5	72.5	72
	K55UTL	Three-Phase	4	1,100	50Hz	-	7414	-	965	-	56	-	64	-	75 .	80.0
					60Hz	-	8988	-	1469	-	59	-	67	-	81
	K55UTH	Three-Phase	4	1,500	50Hz	8528	8054	1657	998	59	58.5	67	66.5	78	77.5	80.0
					60Hz	10086	9439	1685	1617	62	61.5	70	69.5	82	81.5

(Note) 1. Values are specified at the static pressure of 0 Pa.
2. The air volume is measured according to the chamber method (JIS C9603).
3. Noise: suction side-Noise level measured at 1.5m from the suction side.
Casing side-Noise level measured at 1.5m from the side of the fan.
Discharge side-Noise level measured diagonally 1.5m from the discharge side.
* Noise measurement conditions
The suction side of the fan is equipped with a bellmouth and the discharge side is equipped with a duct (2D).

INSTALLATION INSTRUCTIONS

1. Precautions During Installation

- Check the following.

● Is there any breakage or deformation?

●Is the product as per your order? Name

- If any error is found, please contact the dealer you purchased from.

2. Installation

Connect the circular duct to the adaptor by taping.

Connect the rectangular duct with a flexible joint of non-flammable material such as a canvas cloth.

*Install Low noise type compact size axial flow fan according to Compact size axial flow fan.

Vibration proof rubber set (optional) can be applied.

Lift the body by firmly fixing it with the bolts and nuts. (to be prepared by the user.)

Install the body horizontally.

Install the exterior duct in a slightly declining slope toward outer side.

Compact size axial flow fan

Check the air direction referring to the name plate.

install with the drain port facing down.

Low noise type compact size axial flow fan

Wiring Cautions (With silencer installed on the discharge side) Follow the sequence according to the number described as below

※There is no connecting terminal for K25DSF1 and K25USF1

A Detailed view For single phase

For three phase

1. Remove the from silencer.

2. Cut the grommet of the cover to pass the power cable through it.

3. Connect the power cable to the terminal block according to the connection diagram.

4. Tighten the cover with screws the same as it was tightened before.

3. Electric Wiring Cautions

Ask the electrical shop for wiring.

● To the electrical shop who makes wiring.
- Kindly work in accordance with the electric equipment engineering standards and the working standard specified by the power company.
- According to the electrical installation standard, perform the grounding work.
- Connect the line after opening the terminal cover.
● Kindly connect as indicated in the following drawings.
● After wiring, check the rotation direction.
- For K55DTL and K55UTL, which do not have two-speed motor, connect the red, white and black lines to the R, S and T terminals, respectively.

WIRING DIAGRAM(SINGLE PHASE)K25DSF1K28DSRK28DSMK35DSMK40DSLK40DSHK45DSTK45DSLK25USF1K28USRK28USMK35USMK40USLK40USHK45USTK45USL

*HI*LO*There is no connecting terminal for K25DSF1 and K25USF1

WIRING DIAGRAM (THREE PHASE)

K40DTL K40DTH K45DTT K45DTL K45DTH K55DTH K40UTL K40UTH K45UTT K45UTL K45UTH K55UTH

graph LR
    A["POWER SUPPLY"] --> B["R"]
    A --> C["S"]
    A --> D["T"]
    B --> E["Terminal"]
    C --> E
    D --> E
    E --> F["MOTOR"]
    G["U"] --> F
    H["V"] --> F
    I["W"] --> F
    J["U1"] --> F
    K["V1"] --> F
    L["W1"] --> F
    M["E"] --> N["Ground"]
    style F fill:#fff,stroke:#000
    style N stroke-dasharray: 5 5

graph TD
    A["POWER SUPPLY"] --> B["U"]
    A --> C["V"]
    A --> D["W"]
    A --> E["U1"]
    A --> F["V1"]
    A --> G["W2"]
    B --> H["RED"]
    C --> I["WHT"]
    D --> J["BLX"]
    E --> K["BRW"]
    F --> L["YEL"]
    G --> M["BLU"]
    H --> N["MOTOR"]
    I --> N
    J --> N
    K --> N
    L --> N
    M --> N
    N --> O["E"]