Installation

Supply fan adjustment

Use the following procedure to determine the proper adjustment of the supply fan for a specific application.

1.Determine total external static pressure about system and accessories.

a.Obtain the design airflow rate and the design external static pressure drop through the distribution system.

b. Add static pressure drop of the accessories installed on the unit. (Table 7,8 & 9)

c. Add the total accessory static pressure drop (from step 1b) to the design external static pressure (from step 1a).The sum of these two values is the total system external static pressure.

2.Using the Tables 10 through 20 to find the external static pressure that most closely approximates total system external static pressure. Then locate the appropriate airflow rate for your unit. The value obtained represents the brake horsepower for the supply fan motor and the fan RPM.

3.Adjust motor sheave according to Table 6.

Table 6 - Motor sheave / Fan speed

Fan Speed (RPM)

Standard Drive

 

6 turns

5 turns

4 turns

3 turns

2 turns

1 turns

 

UNIT

Open

Open

Open

Open

Open

Open

Closed

 

 

 

 

 

 

 

 

YKD/YKH 155

566

601

637

672

708

743

N/A

YKD/YKH 175

724

769

815

860

906

951

N/A

YKD/YKH 200

513

550

586

623

659

696

N/A

YKD/YKH 250

588

619

650

681

712

743

N/A

 

 

 

 

 

 

 

 

TKD/TKH 155

566

601

637

672

708

743

N/A

TKD/TKH 175

724

769

815

860

906

951

N/A

TKD/TKH 200

513

550

586

623

659

696

N/A

TKD/TKH 250

588

619

650

681

712

743

N/A

 

 

 

 

 

 

 

 

WKD/WKH 125

533

566

600

633

667

700

N/A

WKD/WKH 155

566

601

637

672

708

743

N/A

WKD/WKH 200

513

550

586

623

659

696

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan Speed (RPM)

 

 

 

 

 

 

 

Oversized Drive

 

 

 

 

 

 

 

 

 

 

 

 

6 turns

5 turns

4 turns

3 turns

2 turns

1 turns

 

UNIT

Open

Open

Open

Open

Open

Open

Closed

 

 

 

 

 

 

 

 

YKD/YKH 155

672

714

756

798

840

882

N/A

YKD/YKH 175

791

840

890

939

989

1038

N/A

YKD/YKH 200

680

711

742

773

804

835

N/A

YKD/YKH 250

690

722

754

786

818

850

N/A

 

 

 

 

 

 

 

 

TKD/TKH 155

672

714

756

798

840

882

N/A

TKD/TKH 175

791

840

890

939

989

1038

N/A

TKD/TKH 200

680

711

742

773

804

835

N/A

TKD/TKH 250

690

722

754

786

818

850

N/A

 

 

 

 

 

 

 

 

WKD/WKH 125

724

769

815

860

906

951

N/A

WKD/WKH 155

513

550

586

623

659

696

N/A

WKD/WKH 200

588

619

650

681

712

743

N/A

 

 

 

 

 

 

 

 

RT-SVX19A-E4

15

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Image 15
Trane RT-SVX19A-E4 manual Supply fan adjustment, Motor sheave / Fan speed, Fan Speed RPM Standard Drive

RT-SVX19A-E4 specifications

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