Accessories

APPLYING FILTER PRESSURE DROP TO DETERMINE SYSTEM AIRFLOW

To determine the approximate airflow of the unit with a filter in place, follow the steps below:

1.Select the filter type.

2.Select the number of return air openings or calculate the return opening size in square inches to determine the proper filter pressure drop.

3.Determine the External System Static Pressure (ESP) without the filter.

4.Select a filter pressure drop from the table based upon the number of return air openings or return air opening size and add to the ESP from Step 3 to determine the total system static.

5.If total system static matches a ESP value in the airflow table (i.e. 0.20 w.c. (50 Pa), 0.60 w.c. (150 Pa), etc,) the system airflow corresponds to the intersection of the ESP column and Model/Blower Speed row.

6.If the total system static falls between ESP values in the table (i.e. 0.58 w.c. (144 Pa), 0.75 w.c. (187 Pa), etc.), the static pressure may be rounded to the nearest value in the table determining the airflow using Step 5 or calcu- late the airflow by using the following example.

Example: For a 60,000 BTUH (17.58 kW) furnace with a bot- tom return opening and operating on high-speed blower, it is found that total system static is 0.58” w.c. To determine the system airflow, complete the following steps:

Obtain the airflow values at 0.50 w.c. (125 Pa) & 0.60 w.c. (150 Pa) ESP.

Airflow @ 0.50”: 1250 CFM (35.4 m3/min)

Airflow @ 0.60”: 1180 CFM (33.4 m3/min)

Subtract the airflow @ 0.50 w.c. (125 Pa) from the airflow @ 0.60 w.c. (150 Pa) to obtain airflow difference.

1180 - 1250 = -70 CFM (-12 m3/min)

Subtract the total system static from 0.50 w.c. (125 Pa) and divide this difference by the difference in ESP values in the

table, 0.60 w.c.	(150 Pa) - 0.50 w.c. (125 Pa), to obtain a
percentage.

(0.58 - 0.50) / (0.60 - 0.50) = 0.8

Multiply percentage by airflow difference to obtain airflow reduction.

(0.8) X (-70) = -56

Subtract airflow reduction value to airflow @ 0.50 w.c. (125 Pa) to obtain actual airflow @ 0.58 in. w.c. (144 Pa) ESP.

1250 - 56 = 1194

PROPANE (LP) CONVERSION KIT -

1NP0347 - 040, 080,100 MBH

1NP0348 - 060, 115, 130 MBH

This accessory conversion kit may be used to convert natural gas (N) units for propane (LP) operation. Conversions must be made by qualified distributor or dealer personnel.

SIDE RETURN FILTER -

1SR0302 - All Models

1SR0200 - All Models

BOTTOM RETURN FILTER -

1BR0114 or 1BR0214 - For 14-1/2” cabinets 1BR0117 or 1BR0217 - For 17-1/2” cabinets 1BR0121 or 1BR0221 - For 21” cabinets 1BR0124 or 1BR0224 - For 24-1/2” cabinets

INTERNAL FILTER WITH FIBER FILTER -

1HF0801 - All Models

HIGH ALTITUDE PRESSURE SWITCHES -

For installation where the altitude is less than 8,000 feet it is not required that the pressure switch be changed. For alti- tudes above 8,000 feet see kits below. Conversion must be made by qualified distributor or dealer personnel.

1PS0301 - 040, 060 MBH 1PS0302 - 080 MBH 1PS0311 - 100, 115, 130 MBH

ROOM THERMOSTATS - A wide selection of compatible thermosets are available to provide optimum performance and features for any installation.

1H/1C, manual change-over electronic non-programmable thermostat.

1H/1C, auto/manual changeover, electronic programmable, deluxe 7-day, thermostat.

1H/1C, auto/manual changeover, electronic programmable.

*For the most current accessory information, refer to the price book or consult factory.

Subject to change without notice. Printed in U.S.A.	036-21618-003	Rev. A (1205)
Copyright © by Unitary Products Group 2005. All rights reserved.	Supersedes: 036-21618-002	Rev. A (1004)

Unitary	5005	Norman
Products	York	OK
Group	Drive	73069

LY8S specifications

The York LY8S represents a remarkable advancement in the realm of commercial air conditioning units, offering cutting-edge technology, efficiency, and reliability for various applications. Designed for both new and retrofitted systems, the LY8S stands out with its extensive set of features and capabilities, making it an outstanding choice for facility managers and HVAC professionals.

One of the defining features of the York LY8S is its energy efficiency. The unit utilizes advanced compressor technologies, specifically a variable-speed compressor, which enables it to adapt its performance based on the specific cooling demands of the environment. This flexibility not only enhances comfort but also reduces energy consumption, leading to significant cost savings over time. With high Seasonal Energy Efficiency Ratio (SEER) ratings, the LY8S aligns with stringent energy regulations, making it an ecologically sound choice for modern buildings.

In terms of technology, the York LY8S is equipped with a state-of-the-art control system. The advanced microprocessor-based controls allow for precise temperature management, programming capabilities, and real-time monitoring. This feature enables facility managers to optimize system performance efficiently and ensures that maintenance needs are easily identified, thus prolonging the unit's lifespan.

Moreover, the LY8S incorporates robust construction designed for durability in diverse environments. With galvanized steel construction and high-quality insulation, the unit performs well in various climatic conditions, offering both reliability and longevity. The compact footprint of the unit allows for installation in spaces where larger units may not fit, giving it versatility in urban and constrained environments.

Noise reduction is another key feature of the York LY8S. Utilizing sound-dampening technology, the unit maintains quieter operation levels, making it ideal for hospitals, schools, and office environments where noise disruptions can be detrimental.

The York LY8S also integrates seamlessly with modern building management systems (BMS), enhancing operational efficiency and facilitating remote monitoring and control. This connectivity allows users to track performance data, manage energy consumption, and adjust settings from anywhere, leading to enhanced operational flexibility.

In conclusion, the York LY8S delivers a blend of energy efficiency, advanced technology, and robust construction that caters to the needs of commercial applications. With its focus on reliability, performance, and user-friendly controls, the LY8S stands as a leading solution for those seeking efficient climate control solutions in today’s demanding environments.