York NF120 - User Manual

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Technical Guide

SPLIT-SYSTEM

EVAPORATOR BLOWERS

NE090, NE/NF120, NE180 & NE240

7.5 THRU 20 NOMINAL TONS

(Export Only R-410A)

679948-YTG-A-0111

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

DESCRIPTION

The 7.5 thru 10 Ton Evaporator Blowers are single piece units which

include a well-insulated cabinet, a DX cooling coil with copper tubes

and aluminum fins, expansion valve(s), distributor(s), throwaway fil-

ters, a centrifugal blower, a blower motor, an adjustable belt drive and

a blower motor contactor.

These units are shipped in the vertical position ready for field installa-

tion. 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.

The 15 and 20 ton evaporator blowers are designed with two distinct

modules to provide maximum application flexibility. The units are

shipped as single packages with the blower module mounted on top of

the coil module. The blower module can be repositioned in the field to

meet almost any installation requirement.

The 15 Ton blower module includes the blower wheel, motor and

drive. The 20 Ton blower module includes the blower wheels and room

for a field mounted motor and drive.

The coil modules include direct expansion coils, one inch throwaway

filters, liquid line solenoid valve for 50% capacity reduction, thermal

expansion valves, distributors and a condensate drain pan. Each coil

module also includes a solenoid valve for non-recycling pumpout.

When the cooling requirement in the condition space is satisfied, the

refrigerant is pumped into the high side of the system.

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 require field fur-

nished insulation for certain applications.

THREE-PHASE ELECTRIC HEATERS (7.5 THRU 15 TON

ONLY)

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

Product Description and Field Accessories

Evaporator Blower Unit Features

Details the physical and functional aspects of the evaporator blower units.

Installation and Application Flexibility

Flexible Installation for 7.5-10 Ton Units

Describes how these units can be installed vertically or horizontally.

Blower Module Repositioning for 15 Ton Units

Explains the flexibility in positioning the blower module for various installation requirements.

Model 20 Ton Unit Configuration and Accessories

Blower Module Repositioning for 20 Ton Units

Details the repositioning options for the 20-ton model's blower module.

Electric Heat Accessory Capacity and Specifications

Electric Heater Capacity Ratings

Steam and Hot Water Coil Performance Data

Supply Air Blower Performance NE090 (7.5 Ton)

Blower Performance Table NE090

Presents blower performance data including CFM, RPM, Wattage, and BHP for the 7.5-ton unit.

Supply Air Blower Performance NE;NF120 (10 Ton)

Blower Performance Table NE;NF120

Presents blower performance data including CFM, RPM, Wattage, and BHP for the 10-ton unit.

Supply Air Blower Performance NE180 (15 Ton)

Blower Performance Table NE180

Presents blower performance data including CFM, RPM, Wattage, and BHP for the 15-ton unit.

Blower Performance NE240 and Unit Accessory Resistance

Blower Performance Table NE240

Presents blower performance data including CFM, RPM, Wattage, and BHP for the 20-ton unit.

Unit Dimensions and Clearances for NE090;NE;NF120

Unit Dimensions Diagram NE090;NE;NF120

Minimum Clearances NE090;NE;NF120

Unit Dimensions and Clearances for NE180

Unit Dimensions and Clearances for NE240

Electrical Data for NE090, NE;NF120, and NE180

Electrical Data Tables

Presents electrical data including MCA and fuse/breaker sizes for models.

Electrical Data for NE240 Unit

Electrical Data Tables for NE240

Presents electrical data including MCA and fuse/breaker sizes for the NE240.

The YORK Heating and Air Conditioning Technical Guide describes split-system evaporator blowers, specifically models NE090, NE/NF120, NE180, and NE240, ranging from 7.5 to 20 nominal tons, designed for R-410A refrigerant and export only.

Function Description

The evaporator blowers are designed to provide cooling and heating (with optional accessories) for conditioned spaces. The 7.5 and 10-ton units are single-piece units, while the 15 and 20-ton units consist of two distinct modules (blower and coil) for application flexibility. The system works by pumping refrigerant into the high side when the cooling requirement is met, ensuring efficient operation.

Important Technical Specifications

General Unit Components:

Cabinet: Well-insulated.
Cooling Coil: DX type with copper tubes and aluminum fins.
Expansion Valves: Included.
Distributors: Included.
Filters: Throwaway type (1-inch).
Blower: Centrifugal.
Blower Motor: Included.
Drive: Adjustable belt drive.
Contactor: Blower motor contactor.
Solenoid Valve (Coil Modules): For 50% capacity reduction (liquid line) and non-recycling pumpout.

Physical Data (NE/NF Models):

Centrifugal Blower (Dia. X Wd. in.): 15x15 (90, 120 models), 18x18 (180 model), (2) 15x12 (240 model).
Fan Motor HP (Belt Drive): 1.5 HP (90), 2 HP (120), 3 HP (180), 3 or 5 HP (240).
Evaporator Coil:
- Rows Deep: 3 (all models).
- Finned Length (in.): 46 (90, 120), 54 (180), 83 (240).
- Fins per Inch: 13 (all models).
- Face Area (ft.²): 8.6 (90), 10.2 (120), 12.0 (180), 18.4 (240).
Hot Water Coil (Optional):
- Rows Deep: 2 (all models).
- Finned Length (in.): 46 (90, 120), 54 (180), 83 (240).
- Fins Per Inch: 12 (all models).
- Face Area (ft.²): 6.8 (90, 120), 10.3 (180), 14.5 (240).
- Inlet/Outlet Connection: 1" NPTE (90, 120), 1-3/8" O.D. (180, 240).
Steam Coil (Optional):
- Rows Deep: 1 (all models).
- Finned Length (in.): 45.5 (90, 120), 54 (180), 83 (240).
- Fins Per Inch: 8 (all models).
- Face Area (ft.²): 6.6 (90, 120), 10.13 (180), 13.8 (240).
- Inlet/Outlet Connection: 1-1/2" NPTE (all models).
Air Filters:
- Quantity Per Unit (16" x 25" x 1"): 4 (90, 120), 0 (180, 240).
- Quantity Per Unit (20" x 20" x 1"): 0 (90, 120), 6 (180), 0 (240).
- Quantity Per Unit (20" x 22" x 1"): 0 (90, 120, 180), 8 (240).
- Total Face Area (ft.²): 11.1 (90, 120), 16.7 (180), 24.4 (240).

Electrical Data (Evaporator Units):

Motor HP: 1.5, 2.0, 3.0, 5.0.
Power Supply: 208-3-60, 230-3-60, 460-3-60.
Electric Heat Options: Available in various KW capacities (10, 16, 26, 36, 72 KW) with 1 or 2 stages.
Minimum Circuit Ampacity (MCA): Varies by model, motor HP, and electric heat option.
Max Fuse/Breaker Size: Varies by model, motor HP, and electric heat option.

Usage Features

Application Flexibility:

7.5 & 10 Ton Models: Single cabinet design allows for vertical or horizontal installation. For horizontal installations, the unit is designed for ceiling suspension, with weld nuts provided for hanger rods (field supplied).
15 Ton Models: Two distinct modules (blower and coil) shipped in a vertical position, but the blower module can be repositioned in the field for maximum flexibility (vertical air discharge, vertical air intake, or horizontal air discharge).
20 Ton Models: Two distinct modules (blower and coil) shipped in a vertical position, with the blower module capable of being repositioned in various configurations for maximum flexibility (12 different arrangements shown in figures).

Accessories (Field Installed):

Supply Air Plenums: Fully insulated, available for free-standing units, shipped knocked-down for assembly, finished to match the unit, and include double deflection grills for adjustable air throw, spread, and drop.
Return Air Grills: Expanded metal grills, finished to match the unit, shipped in one piece.
Bases: Available to raise vertical units above the floor, allowing for outdoor air introduction through an access opening. Finished to match the unit, may require field-furnished insulation.
Three-Phase Electric Heaters (7.5 thru 15 Ton Only): Available in various capacities, designed for easy field installation over the supply air opening. Tested with CSA label, protected against excessive current and temperature by fuses and high limit thermostats. Only one power supply needed for both heating elements and blower motor.
Hot Water Coils: Drainable, 2 rows of 1/2" copper tubes, 12 aluminum fins per inch, casing matches unit. Slide out for easy installation. Mount over return air opening on 7.5/10-ton units, or between coil and blower sections on 15/20-ton units.
Steam Coils: Non-freeze, 1 row of 1" copper tubes (5/8" copper tube inside), 8 aluminum fins per inch, casing matches unit. Slide out for easy installation, pitched for condensate drainage. Mount over return air opening on 7.5/10-ton units, or between coil and blower sections on 15/20-ton units.
Suspension Kit: Available for 15 and 20-ton units installed horizontally, includes channel iron supports and hardware. Hanger rods must be field furnished.
Thermostats: Wall-mounted, 24-volt, with system and fan switches.
Blower Motors (20 Ton Units Only): Two different HP motors available, with inherent protection and permanently lubricated ball bearings, field-mounted.
Drive Packages (20 Ton Units Only): Two drive packages available to provide a blower RPM range. Variable pitch motor pulleys for adjustment. Rated at least 25% above nominal HP. Two-groove pulleys and two belts for 5 HP drive package.

Maintenance Features

Filters: Throwaway filters for easy replacement.
Coil Access: Hot water and steam coils slide out of their casings for easy field installation.
Filter Access Panel: Filters can be removed through either side of the unit (NE180).
Condensate Drain: Units designed with condensate drain pans, and sufficient clearance is required for trapping the condensate drain line.
Blower Motor and Drive Access: Access panels are provided for maintenance. For NE180, if piping connections are on the opposite side of the unit, additional clearance is needed for blower motor access.