York MA Section IV Electric Heater Installation, Section V LOW Voltage Control Connections

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262675-UIM-A-0806

HORIZONTAL SUSPENSION

For suspension of these units in horizontal applications, it is recom- mended to use angle steel support brackets with threaded rods, sup- porting the units from the bottom, at the locations shown in Figure 4.

SUSPENSION SUPPORT LOCATIONS FOR HORIZONTAL APPLICATIONS

MIN. 3/8”

 

 

 

THREADED ROD

 

 

 

MIN. 1-1/2” x 1-1/2” Angle

 

 

Recommended length

 

 

 

26” minimum

 

 

 

with 2” clearance on

 

 

 

both sides of Air Handler

 

 

 

2

 

 

1-1/2

WW

 

YY

 

 

 

XX

 

Units

 

Dimension

 

(Nominal Tons)

WW

XX

YY

1-1/2 - 3 Ton

16”

48”

22”

3-1/2 - 5 Ton

24”

53” - 58”

22”

SECTION IV: ELECTRIC HEATER INSTALLATION

If the air handler requires electric heat, install the electric heat kit according to the installation instructions included with the kit. After installing the kit, mark the air handler nameplate to designate the heater kit that was installed. If no heater is installed, mark the name plate appropriately to indicate that no heat kit is installed.

The HEAT ENABLE jumper (See Figure 5) must be moved to the HEAT position to enable operation of the heater.

Use only 4HK heater kits, as listed on Air Handler name plate and in these Instructions. Use data from Tables 11 through 18 for information on required minimum motor speed tap to be used for heating operation, maximum over-current protection device required and minimum electri- cal supply wiring size required for listed combination of Air Handler and Heater Kit.

For Upflow, Downflow and Horizontal right hand applications the kits can be installed without modification.

Field modification is required for Horizontal left-hand airflow application only. Follow instructions with heater for modification.

FIGURE 4: Typical Horizontal Installation

HEAT ENABLE

HUM OUT

EAC

RELAY OUTPUT

RELAY OUTPUT

JUMPER

 

 

LOW FAN

RELAY OUTPUT

MODE JUMPER

HUM STAT JUMPER

FUSE

SPARE JUMPER

FIGURE 5: Control Board

SECTION V: LOW VOLTAGE CONTROL CONNECTIONS

The 24 volt power supply is provided by an internally wired low voltage transformer which is standard on all models, However, if the unit is con- nected to a 208 volt power supply, the low voltage transformer must be rewired to the 208 volt tap. See the unit wiring label.

Field supplied low voltage wiring can exit the unit on the top right hand corner or the right hand side panel. Refer to Figure 3.

Remove desired knockout and pierce foil faced insulation to allow wir- ing to pass through. Use as small of a hole as possible to minimize air leakage.

Install a 7/8” plastic bushing in the selected hole and keep low voltage wiring as short as possible inside the control box.

To further minimize air leakage, seal the wiring entry point at the outside of the unit.

The field wiring is to be connected at the screw terminals of the control board. Refer to Figures 10 & 11.

Unitary Products Group

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Contents List of Sections Section II SafetyList of Figures List of TablesSection III Unit Installation AIR Handler and Coil Upflow and Horizontal Instructions Downflow and Horizontal ConversionAIR Handler and Coil Downflow Instructions Apply neoprene gasket to top of coilDimensions Wiring Knockouts1 Duct ConnectorsPower AIR FiltersUnits Dimension Nominal Tons Section IV Electric Heater InstallationSection V LOW Voltage Control Connections Horizontal SuspensionSection VI Required Control Humidity Switch InputSET-UP Functionality and OperationSection VII Line Power Connections Section Viii Blower Speed Connections Line Power ConnectionsSection IX Unit Data KW & MBH Conversions for Total Power Input RequirementModels MA 208V 230VW1 Only W2 Only W1 + W2 Models Heat Kit Single Max Min Total Heat1 KW Staging SpeedHeater ModelModels Heat Kit Max Min Total Heat1 KW Staging Speed Field WiringWire Size AWG Models Heat Kit Heater Field Wiring20D 4HK16502525 40.0 31.3 Min. Circuit Ampacity230 / 460 Volt 60 Hz ModelsVolt 60 Hz Bearings of the blower motor are permanently lubricated Section X MaintenanceLubrication Unitary 5005 Norman Product York Group Drive 73069

MA specifications

York, Maine, is a picturesque coastal town that embodies the charm and beauty of New England. Nestled along the shores of the Atlantic Ocean, this town is renowned for its stunning beaches, rich history, and vibrant community life. The natural landscape of York is characterized by its rugged coastline, rolling hills, and lush forests, making it a prime destination for outdoor enthusiasts and nature lovers.

One of the main features of York is its beautiful beaches, notably York Beach, Long Sands, and Short Sands. These sandy stretches attract visitors throughout the summer months, offering opportunities for swimming, sunbathing, and beachcombing. The picturesque lighthouse at Cape Neddick, often referred to as “Nubble Light,” is a beloved landmark that epitomizes the coastal aesthetic of the area and is a popular spot for photography.

York is steeped in history, with many historic sites that tell the story of its founding in the early 17th century. The Old York Historical Society offers insight into the town's past, featuring well-preserved structures and exhibits on colonial life. The charm of its historical architecture can also be seen in the area's classic New England homes and iconic buildings, such as the York Village Church.

In terms of technology, York has kept pace with modern advancements while preserving its historical identity. The town embraces sustainable practices, integrating technology in areas such as waste management and renewable energy initiatives. Residents enjoy access to high-speed internet, which has become increasingly vital for both remote work and education.

Community features in York include its bustling downtown area, where local shops, restaurants, and cultural attractions create a vibrant atmosphere. The blend of small businesses and artisanal shops provides a unique shopping experience, while local dining options celebrate the region's seafood bounty and farm-to-table concepts.

York also values education, with a strong emphasis on providing quality schooling for children. The town is known for its dedicated educators and active community involvement in fostering a nurturing environment for learning.

In summary, York, Maine, is a delightful combination of natural beauty, rich history, and modern amenities. The town’s commitment to preserving its character while embracing new technologies ensures that it remains a desirable destination for both residents and visitors alike. Whether enjoying the beaches, exploring historic sites, or relishing the local cuisine, York offers an enriching experience that captures the essence of coastal New England living.
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