York BUZ024 User Manual

R-410A
BUZ024-060
2-5 Ton
ISO 9001
Certified Quality
Management System
268723-BIM-C-0908
TABLE OF CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . 8
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Phasing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Airflow Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Anti-short Cycle Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cooling Sequence Of Operations . . . . . . . . . . . . . . . . . . . 15
Heating Sequence Of Operations. . . . . . . . . . . . . . . . . . . 16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Normal Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Typical Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . 19
LIST OF TABLES
1 Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Unit Accessory Weights . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Unit Dimensions Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Side Duct Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Bottom Duct Application . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Additional Static Resistance . . . . . . . . . . . . . . . . . . . . . . 14
10 Electric Heat Minimum Supply Air . . . . . . . . . . . . . . . . . 15
11 Indoor Blower Specifications . . . . . . . . . . . . . . . . . . . . . . 15
12 Electric Heat Multipliers . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Demand Defrost Selection . . . . . . . . . . . . . . . . . . . . . . . 16
14 Thermostat Signals (Single Phase Units) . . . . . . . . . . . . 17
15 Thermostat Signals (Three Phase Units) . . . . . . . . . . . . 17
LIST OF FIGURES
1 Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Dimensions Front and Bottom . . . . . . . . . . . . . . . . . . . . . 6
5 Dimensions Back and Bottom . . . . . . . . . . . . . . . . . . . . . 6
6 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Typical Field Control Wiring Diagram . . . . . . . . . . . . . . . 9
8 Typical Field Power Wiring Diagram . . . . . . . . . . . . . . . 10
9 Demand Defrost “Curve” Selection Jumper . . . . . . . . . . 16
10 R-410A Quick Reference Guide . . . . . . . . . . . . . . . . . . 22
General
UPG Model BUZ units are factory assembled heat pumps
designed for outdoor installation on a roof top or a slab. Field-
installed electric heater accessories are available to provide
supplemental electric heat combined with electric cooling and
heating.
The units are completely assembled on rigid, removable base
rails. All piping, refrigerant charge, and electrical wiring is
factory installed and tested. The units require only electric
power and duct connections at the point of installation.
The electric heaters have nickel-chrome resistance wire
elements and utilize single point power connection.
Safety Considerations
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 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 damage.
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 maintenance can cause injury or
property damage. Refer to this manual for assistance or
for additional information, consult a qualified contractor,
installer or service agency.

York BUZ024 Specifications

General

Brand	York
Model	BUZ024
Category	Heat Pump
Language	English

Summary

Nomenclature

Installation and Limitations

Installation

Covers essential steps for proper unit installation, adhering to codes and standards.

Limitations

Details restrictions and guidelines for unit installation to ensure proper operation and safety.

Site Selection and Handling

Location

Provides guidance on selecting a suitable placement for the unit, considering airflow and environmental factors.

Rigging And Handling

Explains the safe methods and precautions for moving and lifting the unit during installation.

Clearances

Specifies required clearances around the unit for proper operation and servicing.

Unit Dimensions

Unit Dimensions Front

Presents detailed measurements of the unit's front dimensions and related features.

Unit Clearances

Details minimum clearance requirements for unit installation and servicing.

Dimensional Details

Dimensions Front and Bottom

Illustrates the unit's front and bottom measurements and port locations.

Dimensions Back and Bottom

Details the unit's back and bottom measurements and port locations.

Ductwork and Filters

Ductwork

Discusses requirements for designing and connecting ductwork for supply and return air.

Roof Curb

Information regarding the correct positioning of the unit on a roof curb.

Filters

Details the importance and maintenance of air filters for unit efficiency and longevity.

Service and Utilities

Condensate Drain

Instructions for installing the condensate trap and drain line, conforming to local codes.

Service Access

Identifies locations for accessing serviceable components for maintenance and repair.

Thermostat and Wiring

Guidance on thermostat placement, wiring, and power supply requirements for unit control.

Component Data

Electrical Data

Provides detailed electrical specifications including voltage, amperage, and fuse/breaker sizes.

Physical Data

Presents physical characteristics like capacity, EER, SEER, CFM, and dimensions.

Compressor and Phasing

Compressor Information

Details the specific type of compressor used and its compatibility with R-410A refrigerant.

Phasing Requirements

Explains how to identify and correct incorrect rotation for three-phase compressors.

Airflow and Resistance

Airflow Performance

Presents CFM data for various speed settings and static pressure conditions.

Side Duct Application

Table detailing airflow performance for side duct installations.

Bottom Duct Application

Table detailing airflow performance for bottom duct installations.

Static Resistance

Table showing static resistance values for various components and airflow.

Electric Heat and Blower

Electric Heat Airflow

Specifies minimum required supply air CFM for electric heat operation.

Indoor Blower Specifications

Details specifications for the indoor blower motor, including HP, RPM, and frame size.

Electric Heat Multipliers

Provides multipliers to adjust electric heat capacity based on applied voltage.

Operation Modes

Anti-short Cycle Timer

Explains the function and bypass method for the compressor anti-short cycle timer.

Cooling Operation Sequence

Describes the sequence of events when the unit operates in cooling mode.

Heating Operation Sequence

Describes the sequence of events when the unit operates in heating mode.

Defrost Operation

Details the unit's defrost cycle logic and initiation conditions.

Safety Switch Operations

Explains the function of safety switches protecting the refrigeration system and electric heat.

Thermostat Signals

Single Phase Thermostat Signals

Details thermostat signals and board functions for single-phase units.

Three Phase Thermostat Signals

Details thermostat signals and board functions for three-phase units.

Maintenance and Troubleshooting

Normal Maintenance Procedures

Covers routine tasks like filter changes and cleaning the outdoor coil.

Troubleshooting Guide

Provides guidance on diagnosing and resolving common unit issues.

Wiring Diagrams

Typical Wiring Diagrams Overview

Overview of wiring diagrams for different unit configurations.

Single Phase Wiring Diagram

Specific wiring diagram for the 208/230-1-60 volt single-phase unit.

Three Phase Wiring Diagrams

Specific wiring diagrams for the 230-3-60 and 460-3-60 volt three-phase units.

R-410A Quick Reference Guide