York BUZ024 Installation Manual

R-410A
BUZ024-060
2-5 Ton
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
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
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

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
labels or in manuals, be alert to the potential for personal injury.
Understand and pay particular attention the signal words
DANGER, WARNING or CAUTION.

TABLE OF CONTENTS

LIST OF TABLES
LIST OF FIGURES
. When you see this symbol on
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
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
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
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.
SO 9001
Certified Quality
Management System
268723-BIM-C-0908