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York MA - User Manual

York MA
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262675-UIM-A-0806
MODULAR
NON-VARIABLE SPEED AIR HANDLERS
MODELS: MA
INSTALLATION MANUAL
ISO 9001
Certified Quality
Management System
SECTION I: GENERAL
This modular air handler provides the flexibility for installation in any
upflow, downflow, or horizontal application. These versatile models may
be used for cooling or heat pump operation with or without electric heat.
A BRAND LABEL (available from Distribution) may be applied to the
center of the blower access panel.
The unit can be positioned for bottom return air in the upflow position,
top return air in the downflow position, and right or left return in the hor-
izontal position.
Top and side power wiring and control wiring, accessible screw termi-
nals for control wiring and easy to install electric heaters all combine to
make the installation easy, and minimize installation cost.
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury
.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury
.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury.
It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer or service agency.
This product must be installed in strict compliance with the installa-
tion instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical
codes.
LIST OF SECTIONS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ELECTRIC HEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 5
LOW VOLTAGE CONTROL CONNECTIONS . . . . . . . . . . . . . . . . . . 5
REQUIRED CONTROL SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LINE POWER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
BLOWER SPEED CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .8
UNIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
LIST OF FIGURES
Typical Installation with MC or FC Evaporator Coil . . . . . . . . . . . . . . . 3
Coil and Air Handler Attachment Details . . . . . . . . . . . . . . . . . . . . . . . 3
Dimensions & Duct Connection Dimensions . . . . . . . . . . . . . . . . . . . . 4
Typical Horizontal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
460V - Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Blower Speed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
460V - Blower Speed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Cooling Models with Electric Heat Wiring . . . . . . . . . . . . . . . . . . . . . .15
Two-Stage Cooling Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
LIST OF TABLES
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Low Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Low Fan Control Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Blower Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Heat Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Physical and Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Data - Cooling Only (60 Hz) - 208/230 . . . . . . . . . . . . . . . . . 9
Electrical Data - Cooling Only (60 Hz) - 460 . . . . . . . . . . . . . . . . . . . . 9
Conversion Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Data - 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Data - (For Multi-Source Power Supply) -
Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Data - (For Single Source Power Supply) -
Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical Data - 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical Data - (For Multi-Source Power Supply) -
Copper Wire 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Electrical Data - (For Single Source Power Supply) -
Copper Wire 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Electrical Data - 460-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Electrical Data - (For Single Source Power Supply) -
Copper Wire 3 Ø - 460-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Air Flow Data - 60 Hz Models (230 & 460 Volt) . . . . . . . . . . . . . . . . .13
Air Flow Data - 60 Hz Models (208 Volt) . . . . . . . . . . . . . . . . . . . . . .14

Table of Contents

Other manuals for York MA

Preview: Technical Guide
Technical Guide16 pages
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Summary

General

Safety

Unit Installation

Clearances

Required spacing for servicing and installation of air handler components.

Location

Considerations for selecting a suitable installation site for the air handler.

Electric Heater Installation

Low Voltage Control Connections

Required Control Set-up

Jumper Positions

Configuration of jumpers for heat, humidity, and mode settings.

Status and Fault Codes

Understanding LED indicators for unit status and error codes.

Line Power Connections

Blower Speed Connections

Unit Data

Maintenance

Lubrication

Information regarding the lubrication of blower motor bearings.

Summary

General

Safety

Unit Installation

Clearances

Required spacing for servicing and installation of air handler components.

Location

Considerations for selecting a suitable installation site for the air handler.

Electric Heater Installation

Low Voltage Control Connections

Required Control Set-up

Jumper Positions

Configuration of jumpers for heat, humidity, and mode settings.

Status and Fault Codes

Understanding LED indicators for unit status and error codes.

Line Power Connections

Blower Speed Connections

Unit Data

Maintenance

Lubrication

Information regarding the lubrication of blower motor bearings.

Overview

  1. Function Description
  2. Important Technical Specifications
  3. Usage Features
  4. Maintenance Features

This document describes the installation and maintenance of Modular Non-Variable Speed Air Handlers (MA Models). These versatile units are designed for use in various applications, including upflow, downflow, and horizontal configurations, and can be integrated with cooling, heat pump, or electric heat systems.

Function Description:

The MA series air handlers circulate air within a heating, ventilation, and air conditioning (HVAC) system. They are designed to work with evaporator coils, electric heat kits, and outdoor units to provide heating and cooling for residential and light commercial spaces. The control board manages the operation of the blower motor, heat relays, and external accessories like humidifiers and electronic air cleaners based on thermostat inputs and system conditions.

Important Technical Specifications:

  • Voltage Limits:
    • 208/230-1-60 models: 187-253V (utilization range "A" per ARI Standard 110).
    • 460-3-60 models: 432-504V.
  • Entering Air Temperature Limits:
    • Wet Bulb Temp: Min 57°F, Max 72°F.
    • Dry Bulb Temp: Min 65°F, Max 95°F.
  • Blower Motors: All models feature 3-speed blower motors. Specific HP and Nominal RPM vary by model (e.g., 08B21 has 1/4 HP, 1075 RPM; 20D41 has 1 HP, 1075 RPM).
  • Filter Sizes: Vary by model (e.g., 16x20x1 for 08B21, 22x20x1 for 14D21). Permanent type kits are available.
  • Electrical Data (Cooling Only - 60 Hz):
    • 208/230V: Total Motor Amps range from 1.4A (08BN21) to 7.4A (20DN21). Minimum Circuit Ampacity ranges from 1.8A to 6.5A. Max O.C.P. (Over Current Protection) is 15 Amps/Type for all models. Minimum Wire Size is 14 AWG for all models.
    • 460V: Total Motor Amps range from 2.3A (12BN41) to 3.7A (20DN41). Minimum Circuit Ampacity ranges from 3.5A to 5.6A. Max O.C.P. is 15 Amps/Type for all models. Minimum Wire Size is 14 AWG for all models.
  • Electrical Data (with Electric Heat - 1Ø 208/230-1-60):
    • KW (Total Heat) varies significantly based on heat kit and voltage (e.g., 4HK*6500206 at 208V is 1.9 KW; 4HK16502506 at 240V is 24.0 KW).
    • Min. Circuit Ampacity and Max. O.C.P. Amps/Type vary widely based on heat kit and voltage.
    • Wire sizes range from 14 AWG to 1/0 AWG depending on the heat kit and voltage.
  • Electrical Data (with Electric Heat - 3Ø 208/230-3-60):
    • KW (Total Heat) varies significantly based on heat kit and voltage (e.g., 4HK06501025 at 208V is 7.2 KW; 4HK16502525 at 240V is 24.0 KW).
    • Min. Circuit Ampacity and Max. O.C.P. Amps/Type vary widely based on heat kit and voltage.
    • Wire sizes range from 10 AWG to 10 AWG depending on the heat kit and voltage.
  • Electrical Data (with Electric Heat - 460-3-60):
    • KW (Total Heat) varies significantly based on heat kit (e.g., 4HK06501046 at 480V is 9.6 KW; 4HK06502946 at 480V is 28.8 KW).
    • Min. Circuit Ampacity and Max. O.C.P. Amps/Type vary widely based on heat kit.
    • Wire sizes range from 12 AWG to 8 AWG depending on the heat kit.
  • Blower Delays:
    • Following call for cooling: 60 seconds.
    • Following call for heat pump heating: 30 seconds.
    • Following call for electric heat heating: 10 seconds.
  • External Relay Outputs: Three outputs for external 24 VAC relays, max rating 1.0 Amp pilot duty at 24 VAC.
  • Duct Connections: Specific dimensions for duct inlet and outlet connections are provided in Figure 3. Use 1/2" screws for ductwork connections to avoid piercing the drain pan.
  • Clearances:
    • Refrigerant piping: minimum 12".
    • Maintenance/servicing access: minimum 36" from front of unit.
    • Condensate drain lines: routed to clear filter and panel access.
    • Filter removal: minimum 36".
  • Suspension Kit: Model 1BH0601 (for unit sizes 018-060) is available for upflow applications.

Usage Features:

  • Flexible Installation: Can be installed in upflow, downflow, or horizontal (left or right) positions.
  • Easy Access: Top and side power wiring, accessible screw terminals for control wiring, and easy-to-install electric heaters simplify installation and minimize costs.
  • Humidity Control: The control board supports humidity switch input to manage humidification (via HUM OUT relay) and de-humidification (by lowering blower speed via LOW FAN output).
  • Heat Kit Configuration: The HEAT ENABLE jumper allows configuration for heat kit operation. The control provides flexibility to configure the amount of heat delivered with the first stage heating call, depending on the heat kit installed.
  • Mode Jumper: Configures the control for either Air Conditioner (AC) or Heat Pump (HP) operation.
  • Status and Fault Codes: An LED on the control board displays status and fault codes (e.g., limit switch open, fan failure, wiring related faults) to aid in troubleshooting.
  • Blower Speed Adjustment: 3-speed blower motors allow adjustment of airflow to meet specific requirements for evaporator coils, electric heat, and outdoor units.
  • Multi-Source Power Supply: The manual provides wiring diagrams and electrical data for both single and multi-source power supply configurations.

Maintenance Features:

  • Filter Maintenance: Filters must be cleaned or replaced monthly, or more frequently depending on usage and atmospheric conditions, to maintain unit efficiency. Equipment should never be operated without filters.
  • Lubrication: The blower motor bearings are permanently lubricated, requiring no periodic lubrication.

York MA Specifications

General IconGeneral
BrandYork
ModelMA
CategoryAir Handlers
LanguageEnglish

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