DRY Coil Delta P Supply AIR Drive Adjustment

035-19046-002-B-0104

Predator DJ 150 Units

Indoor Coil Pressure Drop vs. Airflow

	1
	0.9
	0.8
(IWG)	0.7
(IWG)	0.6
P	0.6
P
Coil Delta	0.5
Coil Delta	0.4
Dry	0.4
Dry	0.3
	0.3
	0.2
	0.1
	0
	3500	4000	4500	5000	5500	6000	6500

Airflow (CFM)

FIGURE 25 - DRY COIL DELTA P

SUPPLY AIR DRIVE ADJUSTMENT

Before making any blower speed changes review the installation for any installation errors, leaks or undesirable systems effects that can result in loss of airflow.

Even small changes in blower speed can result in substantial changes in static pressure and BHP. BHP and AMP draw of the blower motor will increase by the cube of the blower speed. Static pressure will increase by the square of the blower speed. Only qualified personnel should make blower speed changes, strictly adhering to the fan laws.

At unit start-up, the measured CFM may be higher or lower than the required CFM. To achieve the required CFM, the speed of the drive may have adjusted by changing the datum diameter (DD) of the variable pitch motor sheave as described below:

(Required CFM ) • Existing DD = New DD Measured CFM

Use the following tables and the DD calculated per the above equation to adjust the motor variable pitch sheave.

EXAMPLE

A 12.5 ton unit was selected to deliver 4,000 CFM with a 3 HP motor, but the unit is delivering 3,800 CFM. The variable pitch motor sheave is set at 2 turns open.

Use the equation to determine the required DD for the new motor sheave,

( 4,0003,800 CFMCFM ) • 4.0 in. = 4.21 in.

Use Table 21 to locate the DD nearest to 4.21 in. Close the sheave to 1 turn open.

New BHP

=(Speed increase)3 • BHP at 3,800 CFM

=(Speed increase)3 • Original BHP

=New BHP

New motor Amps

=(Speed increase)3 • Amps at 3,800 CFM

=(Speed increase)3 • Original Amps

=New Amps

32	Unitary Products Group

DJ150 specifications

The York DJ150 is a standout model in the world of portable DJ equipment, designed to cater to both budding DJs and seasoned professionals. Its sleek and compact form factor makes it highly portable, allowing for easy transporting to gigs, parties, or personal events.

One of the main features of the DJ150 is its user-friendly interface, which includes a simplified control layout. This design boils down essential functions into accessible buttons and knobs, enabling DJs to focus on their mixes without distractions. The large jog wheels are not only responsive but also provide precision when scratching and cueing tracks, making it a joy to use for both live performances and practice sessions.

In terms of sound quality, the York DJ150 is equipped with high-performance audio circuitry. It ensures that sound clarity is maintained, with a dynamic range that captures the intricacies of music. The device supports multiple audio formats, offering versatility for DJs that work with various types of digital music files.

The DJ150 integrates advanced technologies that facilitate seamless mixing and creative expression. With features such as built-in sound effects, loops, and samples, DJs can add their personal touch to sets. Additionally, the model includes an intelligent beat matching function which automatically syncs the tempo of different tracks, allowing for smooth transitions and uninterrupted flow.

Connectivity is another strong point for the York DJ150. It offers multiple input and output options, including USB ports for quick connections to a laptop or external devices, line inputs for instruments or microphones, and headphones output for monitoring. This ensures that users can connect a wide range of equipment while maintaining a clean setup.

Durability plays a key role in the DJ150's design, as it is built to withstand the rigors of frequent use. Its robust construction and quality materials contribute to its longevity, appealing to those who value reliable gear.

In conclusion, the York DJ150 represents a versatile solution for DJs seeking a blend of portability, functionality, and sound quality. Its comprehensive features and professional-grade technologies position it as a strong contender in the DJ equipment market, making it suitable for performances of all levels. Whether you are a novice starting your DJ journey or a seasoned pro looking for an efficient tool, the DJ150 ticks all the boxes.