York EVAPORATOR BLOWERS K2EU060

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Technical Guide

SPLIT-SYSTEM

EVAPORATOR BLOWERS

K2EU060, K4EU090, K3EU120 &

K3EU180

5 THRU 15 NOMINAL TONS

036-21300-002-A-0905

FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE

DESCRIPTION

These completely assembled units include a well-insulated cabinet, a

DX cooling coil with copper tubes and aluminum fins, expansion

valve(s), distributor(s), throwaway filters, a centrifugal blower, a blower

motor, an adjustable belt drive, a blower motor contactor and a small

holding charge of refrigerant-22.

The units are shipped in the vertical position ready for field installation.

They can be installed for horizontal operation by reversing the position

of the solid bottom panel with the return air duct flange on the front of

the unit.

ACCESSORIES—FIELD INSTALLED

SUPPLY AIR PLENUMS

These fully insulated plenums are available for free standing units

located within the conditioned space, are shipped knocked-down for

easy field assembly, are finished to match the exterior of the basic

unit, and have double deflection grills that can be adjusted to vary the

throw, spread and drop of the supply air.

RETURN AIR GRILLS

These expanded metal grills are available for free standing units

located within the conditioned space, are finished to match the exterior

of the basic unit and are shipped in one piece for easy installation.

BASES

Bases are available to raise vertical units above the floor. Outdoor air

may be introduced through these bases by cutting an access opening

to accommodate the outdoor air duct connection. These bases are fin-

ished to match the exterior of the basic unit. They may have to be insu-

lated in the field for certain applications.

THREE-PHASE ELECTRIC HEATERS

Electric heaters are available in several capacities to provide maxi-

mum flexibility. Both the air conditioning unit and the heater can be

selected to precisely match the cooling and heating requirements of

the conditioned space. These heaters are designed for easy field

installation over the supply air opening of the unit. They have been

tested by and will be shipped with a CSA label. Every heater will be

fully protected against excessive current and temperature by fuses

and two high limit thermostats.

Units with electric heat will require only one power supply for both the

heating elements and the supply air blower motor, and the power wir-

ing can be protected by either dual element/time delay fuses or an

inverse time circuit breaker.

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Summary

Unit Description

Field Installed Accessories

Details field-installed accessories such as supply air plenums, return air grills, and bases.

Electric Heater Accessory

Discusses electric heaters available for maximum flexibility and their installation.

Nomenclature and Application Flexibility

Installation Flexibility

Discusses installation flexibility for 5, 7-1/2, and 10-ton models in vertical or horizontal positions.

Field Wiring Diagrams

Cooling Only Unit Wiring

Details the field wiring for cooling-only units, covering 1-stage and 2-stage cooling configurations.

Steam;Hot Water Coil Unit Wiring

Details field wiring for units with steam or hot water coil accessories, covering 1-stage and 2-stage cooling.

Field Wiring for Electric Heat Units

Electric Heat Unit Wiring Diagram

Provides field wiring instructions for units equipped with electric heat accessories.

Overview

This document describes the York Split-System Evaporator Blowers, models K2EU060, K4EU090, K3EU120, and K3EU180, ranging from 5 to 15 nominal tons. These units are designed for heating and air conditioning applications.

Function Description

These are completely assembled air handler units that include a well-insulated cabinet, a DX cooling coil with copper tubes and aluminum fins, expansion valve(s), distributor(s), throwaway filters, a centrifugal blower, a blower motor, an adjustable belt drive, a blower motor contactor, and a small holding charge of refrigerant-22. They are shipped in a vertical position, ready for field installation, but can be configured for horizontal operation by reversing the solid bottom panel. The units are designed to provide conditioned air for various spaces, with options for cooling only or cooling with electric, hot water, or steam heat.

Important Technical Specifications

Nomenclature Breakdown (Example: K4EU090A33):

K: Product Category (Air Handler, Split System, AC)
4: Product Generation (Fourth Generation)
EU: Product Identifier (R-22, Standard Efficiency, 2-Pipe)
090: Nominal Cooling Capacity - MBH (060 = 5 Ton, 090 = 7-1/2 Ton, 120 = 10 Ton, 180 = 15 Ton)
A: Heat Type & Nominal Heat Capacity (Cooling Only - Suitable for field-installed electric heat)
33: Voltage Code (06 = 208/230-1-60, 33 = 208/230-3-60, 460-3-60, 58 = 575-3-60)

Operating Weights (LBS.):

K*EU060: 210 lbs
K*EU090: 235 lbs
K*EU120: 355 lbs
K*EU180: 425 lbs

Blower Motor and Drive Data (Example for KEU060):

Centrifugal Blower (Dia. X Wd. in.): 15 X 15
Fan Motor HP (Belt Drive): 3/4
Rows Deep (Evaporator Coil): 3
Finned Length (in.): 30
Fins per Inch: 13
Face Area (ft.²): 5.0

Coil Specifications:

DX Cooling Coil: Copper tubes and aluminum fins.
Hot Water Coils: 2 rows of 1/2" copper tubes, 12 aluminum fins per inch. Drainable, slide out for easy field installation.
Steam Coils: 1 row of 1" copper tubes, 5/8" copper tube inside each 1" tube, 8 aluminum fins per inch. Non-freeze, pitched for condensate drainage, slide out for easy field installation.

Electric Heaters:

Available in various capacities (10 KW to 72 KW).
Fully protected against excessive current and temperature by fuses and two high limit thermostats.
Require a single power supply for heating elements and blower motor.
Power wiring can be protected by dual element/time delay fuses or an inverse time circuit breaker.

Air Filters:

Quantity per unit (16" X 25" X 1"): 2 (for KEU060), 4 (for KEU090, KEU120).
Quantity per unit (20" X 20" X 1"): 0 (for KEU060, KEU090, KEU120), 6 (for KEU180).
Total Face Area (ft.²): 5.6 (KEU060), 11.1 (KEU090, KEU120), 16.7 (KEU180).

Refrigerant:

Holding charge of Refrigerant 22.
Holding Charge (lbs./oz.): 0/7 (KEU060, KEU090), 0/10 (KEU120), 0/0 (KEU180).

Electrical Data (Min. Circuit Ampacity / Max. Fuse/HACR Breaker):

Varies significantly based on unit model, voltage, and heater KW. For example, a KEU060 with a 26KW heater at 208V requires 77.3 AMPS MCA and 80 AMPS HACR.

Usage Features

Application Flexibility:

Models 5, 7-1/2 & 10 Ton (KEU060, KEU090, KEU120): Built in a single cabinet with two condensate drain pans, allowing for vertical or horizontal installation.
- Vertical applications: Air velocity across the cooling coil prevents condensate from dripping onto filters.
- Horizontal applications: Unit must be installed with the condensate drain pan under the entire cooling coil.
- Accessories: Supply Air Plenum and Return Air Grill can be used in either arrangement. The Base accessory is only for vertical arrangements.
- Horizontal suspension: Designed for ceiling suspension with four 3/8"-16 weld nuts provided in angle supports. Hanger rods must be supplied by the field.
Model 15 Ton (KEU180): Has two distinct modules (blower and coil). Shipped in vertical position with vertical air discharge, but the blower module can be repositioned for maximum flexibility (horizontal discharge).
- Arrangement (a) (vertical): Supply Air Plenum, Return Air Grill, and Base accessories can be applied.
- Arrangement (b) (vertical with repositioned blower): Return Air Grill and Base accessories can be applied.
- Arrangement (c) (horizontal): Supply Air Plenum, Return Air Grill, and Suspension accessories can be applied.

Accessories (Field Installed):

Supply Air Plenums: Fully insulated, shipped knocked-down for field assembly, finished to match the unit, with double deflection grills for adjusting throw, spread, and drop of supply air.
Return Air Grills: Expanded metal grills, shipped in one piece, finished to match the unit.
Bases: Used to raise vertical units above the floor. Can introduce outdoor air by cutting an access opening. May require field insulation.
Suspension Kit (1HH0451 for 15-ton units): Includes two channel iron supports and hardware. Hanger rods supplied by field.

Thermostats:

Wall-mounted 24-volt thermostats and subbases with system and fan switches are available to control unit operation.

Maintenance Features

Filter Access:

Filters can be removed through either side of the unit, depending on the model and configuration.
For KEU060, KEU090, and KEU120, filter access is typically on one side.
For KEU180, filters can be removed through either side.

Coil Removal:

Specific clearances are required for coil removal (e.g., 26" for normal service, 36" for removal for KEU060, KEU090, KEU120).
For KEU180, 26" is required for normal servicing, but 61" is needed for DX coil removal. If the coil needs to be removed, this dimension is required to loosen screws that secure the coil to the unit frame. This dimension is also required for blower motor access if piping connections are made on the opposite side of the unit.

Drain Connection:

A 7/8" O.D. drain connection is provided and must be trapped. Sufficient clearance must be allowed to trap the condensate drain line.

Access Panels:

Blower motor and drive access panels are provided for maintenance.
Filter access panels are also present.

Wiring Access:

Knockouts are provided in the rear and top panels for power and control wiring.
Specific instructions for routing power and control wiring are provided for units with and without electric heat, ensuring compliance with local and national electrical codes.
Holes with grommets are provided for liquid and suction lines.

General Maintenance:

All 1750 RPM motors are solid base, 56 frame with 1.15 service factor, inherent protection, and permanently lubricated ball bearings, reducing maintenance needs.
The units are designed for easy field installation and service, with components like hot water and steam coils designed to slide out of their casings.