York AVC18BX21 - User Manual

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TECHNICAL GUIDE

SINGLE PIECE VARIABLE SPEED ECM

COMMUNICATING AIR HANDLERS

FOR USE WITH SPLIT-SYSTEM

COOLING & HEAT PUMPS

MODELS: AVC SERIES

Due to continuous product improvement,

specifications are subject to change without notice.

Visit us on the web at:

www.upgnet.com and www.york.com

dditional rating information can be found at:

www.ahridirectory.org

WARRANTY SUMMARY

Standard 5-year limited parts warranty.

Extended 10-year limited parts warranty when product is

registered online within 90 days of purchase for replacement

or closing for new home construction.

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

5151060-YTG-F-1116

DESCRIPTION

This fan coil line offers the ultimate in application flexibility. This

unit may be used for upflow, downflow, horizontal right, or

horizontal left applications.

All JCI Unitary Products air handlers and coils can use a TXV to

provide our customers with the optimum performance and

refrigerant control. Single piece air handlers are available with

“Flex-coils” (without a factory installed metering device). For

added flexibility, an R-22 or R-410A TXV or piston must be field

installed to meet the requirement of the desired refrigerant.

Some coil models available with factory installed TXV.

FEATURES

- Rigid Case Construction interior endoskeleton for

structural support, smooth side, and locks in insulation.

Powder-painted - G30 galvanized steel case provide a coated

edge that resists corrosion and rust creep.

MaxAlloy

Coil - Long life aluminum coils built to deliver

lasting performance, efficiency and reliability.

Quality Construction - Structural components are made of

Aluminum or G90 galvanized steel to prevent corrosion.

Improved Insulation Design - Single piece with no external

screws to reduce thermal transmission paths to prevent

sweating. Foil faced insulation for ease of cleaning.

Thermostatic Expansion Valve - The accessory chatleff style

TXV provides easy installation to convert the indoor coil to the

required refrigerant that does not require brazing to replace or

install. Some models are available with factory installed TXV.

Case Depth - These models have 20.5” casing which provide

ease of attic access and tight applications.

Thermoset Drain Pan - Low retention and positive slope for

drainage to reduce potential mold or contaminants.

Factory Sealed - Achieves 2% or less total airflow leakage rate

at duct leakage test conditions in positive and negative

pressure for system airflow verification.

Enhanced Filter Rack - All models have integrated internal

filter racks provided for use with 1” thick standard size filters.

Electric Heat Kits - 6HK series of field installed electric heat

kits are available for installation-friendly and easy service

applications.

Blowers - All models use direct-drive, variable speed ECM

motors.

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Summary

Technical Guide Overview

Product Description and Application Flexibility

This fan coil line offers ultimate application flexibility for upflow, downflow, and horizontal configurations.

Key Product Features and Construction

Highlights features like rigid case, powder-coated steel, MaxAlloy™ coils, and improved insulation for performance and durability.

Cooling Capacity Data

Cooling Capacity Tables

Presents MBH capacities at various evaporator temperatures and pressures for each model, along with rated CFM.

Electric Heat Specifications

Minimum Fan Speed and Heat Performance

Details minimum fan speeds for electric heaters and provides electric heat performance data (kW, MBH) for different voltages.

Single Source Electrical Data (208;230-1-60)

Lists minimum circuit ampacity and maximum overcurrent protection (MOP) for single-phase, 208/230V single-source electric heat.

Multi-Source Electrical Data (208;230-1-60)

Details minimum circuit ampacity and MOP for multi-source, single-phase, 208/230V electric heat applications.

Single Source Electrical Data (208;230-3-60)

Thermostat and Wiring Connections

Typical Thermostat Connections

Heat Pump and Communicating Wiring

Summary

Technical Guide Overview

Product Description and Application Flexibility

This fan coil line offers ultimate application flexibility for upflow, downflow, and horizontal configurations.

Key Product Features and Construction

Highlights features like rigid case, powder-coated steel, MaxAlloy™ coils, and improved insulation for performance and durability.

Cooling Capacity Data

Cooling Capacity Tables

Presents MBH capacities at various evaporator temperatures and pressures for each model, along with rated CFM.

Electric Heat Specifications

Minimum Fan Speed and Heat Performance

Details minimum fan speeds for electric heaters and provides electric heat performance data (kW, MBH) for different voltages.

Single Source Electrical Data (208;230-1-60)

Lists minimum circuit ampacity and maximum overcurrent protection (MOP) for single-phase, 208/230V single-source electric heat.

Multi-Source Electrical Data (208;230-1-60)

Details minimum circuit ampacity and MOP for multi-source, single-phase, 208/230V electric heat applications.

Single Source Electrical Data (208;230-3-60)

Thermostat and Wiring Connections

Typical Thermostat Connections

Heat Pump and Communicating Wiring

This document describes the YORK Single Piece Variable Speed ECM Communicating Air Handlers, specifically the AVC Series, designed for use with split-system cooling and heat pumps.

Function Description:

The AVC Series air handlers are designed to provide ultimate application flexibility, capable of being configured for upflow, downflow, horizontal right, or horizontal left installations. They are a core component of a split-system HVAC setup, responsible for circulating conditioned air throughout a space. These units are compatible with various refrigerants (R-22 or R-410A) and can be equipped with a Thermostatic Expansion Valve (TXV) or piston for optimal performance and refrigerant control. Some coil models come with a factory-installed TXV, while others require field installation.

Important Technical Specifications:

Models: AVC Series (e.g., AVC18BX21, AVC24BX21, AVC30BX21, AVC36BX21, AVC36CX21, AVC42CX21, AVC48CX21, AVC48DX21, AVC60CX21, AVC60DX21).
Cabinet Widths: Available in 14.5", 17.5", 21.0", and 24.5" to accommodate various installation requirements.
Motor Type: Utilizes direct-drive, variable speed ECM motors, which contribute to energy efficiency and precise airflow control.
Coil Type: MaxAlloy™ Coils, constructed from aluminum for long life, lasting performance, efficiency, and reliability. Coils are available in 2 or 3 rows deep, with 12 or 14 fins per inch, and use 3/8" sine wave tube geometry.
Refrigerant Connections: Liquid line sizes are 3/8", and vapor line sizes are 3/4" or 7/8", depending on the model.
Drain Pan: Thermoset drain pan with low retention and positive slope to reduce potential for mold or contaminants.
Airflow Leakage Rate: Factory sealed to achieve 2% or less total airflow leakage rate at duct leakage test conditions, ensuring system airflow verification.
Electrical Data (Cooling Only):
- HP: 1/3 HP or 1/2 HP or 3/4 HP, depending on the model.
- Nominal RPM: 1050 for all cooling-only models listed.
- Voltage: 208/230V.
- Full Load Amps @230V: Ranges from 2.9 to 7.0, depending on the model.
Electric Heat Kits: Compatible with 6HK series field-installed electric heat kits, available in various kW ratings (e.g., 2.4 kW to 24 kW at 240V). These kits include sequential operation and temperature dual limit switches for safety.
Minimum Circuit Ampacity (MCA) and Maximum Overcurrent Protection (MOP): Detailed tables are provided for single-source and multi-source power supplies (208/230-1-60 and 208/230-3-60), indicating required breaker sizes and wire sizing. MOP devices must be HACR type circuit breakers or time delay fuses.
Cooling Capacity (MBH): Detailed tables provide cooling capacities at various entering air dry/wet bulb temperatures and evaporator temperatures/R-410A pressures, ranging from approximately 24.4 MBH to 133.6 MBH, depending on the model and operating conditions.
Airflow Data (CFM): Comprehensive tables detail airflow rates for both cooling and heating at high/low speeds, with various "Cool Tap" and "ADJ Tap" settings. Airflow ranges from 228 CFM to 1935 CFM, depending on the model and settings. Air handler units are tested up to 0.50" w.c. external static pressure.
Voltage Limits: Normal operating voltage range is 187-253V.

Usage Features:

Rigid Case Construction (RC2): Features an interior endoskeleton for structural support, smooth sides, and insulation locks, contributing to durability and reduced thermal transmission.
Powder-painted Case: G30 galvanized steel case with a coated edge resists corrosion and rust creep.
Improved Insulation Design: Single-piece, foil-faced insulation with no external screws reduces thermal transmission paths and is easy to clean.
Enhanced Filter Rack: Integrated internal filter racks are provided for use with 1" thick standard size filters.
Communicating System: Designed to work with communicating AC or HP systems, including York touch screen thermostats with proprietary hexagon interface for optimal performance.
Thermostatic Expansion Valve (TXV): Accessory chatleff style TXVs allow for easy field installation without brazing, simplifying conversion for different refrigerants.
Case Depth: Models have a 20.5" casing depth, facilitating attic access and tight applications.
Combustible Floor Base Accessory: Required for downflow operating positions on combustible floors when an electric heat accessory with zero clearance rating is installed. Specific models (S1-1FB1917, S1-1FB1921, S1-1FB1924) are available.
Breaker Moisture Seal Accessory: An optional clear circuit breaker moisture barrier (S1-02435672000) seals breakers from humidity and dust, allowing ON/OFF operation without removing the cover.

Maintenance Features:

Foil-faced Insulation: Designed for ease of cleaning.
Integrated Filter Racks: Facilitate easy replacement of standard 1" thick filters.
Installation-friendly Electric Heat Kits: Designed for easy service applications.
Thermoset Drain Pan: Low retention and positive slope design helps reduce potential for mold or contaminants, simplifying cleaning and maintenance.
Breaker Moisture Seal (Optional): Protects circuit breakers from moisture and dust, potentially extending their lifespan and reducing maintenance needs.

The document emphasizes that all units must be wired and installed in accordance with national and local safety codes, and airflow must be within specified minimum and maximum limits for electric heat, evaporator coils, and outdoor units. Continuous product improvement means specifications are subject to change without notice.