Page 3
Installer’s Guide
Read this manual carefully before attempting to install, oper-
ate, or perform maintenance on this unit. Installation and
maintenance should be performed by qualified service techni-
cians only. This unit is listed by Underwriters Laboratory.
Packaged units are designed for outdoor mounting with a
vertical condenser discharge. They can be located either at
ground level or on a roof in accordance with local codes. Each
unit contains an operating charge of refrigerant as shipped.
The indoor fan motor speed adjustment is provided in the
Maintenance section.
Extreme mounting kits are available for slab (BAYEXM-
K003A), curb (BAYEXMK001A), and utility curb (BAYEX-
MK0002B) mountings.
Supplemental heaters are installed separately per the appro-
priate Supplemental Electric Heaters Installer's Guide.
Single power entry kits are installed separately per the ap-
propriate Single Power Entry Kit Installer's Guide.
This guide is organized as follows:
Step 1 - Inspect Shipment
Step 2 - Determine Unit Clearances
Step 3 - Review Location & Recommendation Information
Step 4 - Unit Installation
Step 5 - Unit Startup
Sequence of Operation
Maintenance
Introduction
Contents
Safety Considerations
2
Introduction 3
Step 1-Inspect Shipment
3
Step 2-Determine Unit Clearances
4
Step 3-Review Location & Recommendation
Information
10
Step 4-Unit Installation
11
Ground Level Installation
11
Rooftop Installation -- Curb Mounting
11
Covert Horizontal Airflow to Down Airflow
11
Install Full Perimeter Roof Mounting Curb
11
Lifting and Rigging
12
Placing the Unit on the Mounting Curb
12
Rooftop Installation -- Frame Mounting
13
Rooftop Installation -- No Frame/Curb
13
Ductwork Installation
16
Attaching Downflow Ductwork to Roof Curb
16
Attaching Downflow Ductwork to Roof Frame
16
Attaching Horizontal Ductwork to Unit
16
Condensate Drain Piping
16
Air Filter Installation
16
Electrical Wiring
17
Electrical Connections
17
Electrical Power
17
Disconnect Switch
17
Overcurrent Protection
17
Power Wiring
17
Field Wiring Diagram
18
Control Wiring (Class II)
19
Thermostat Heat Anticipator
19
Step 5-Unit Startup
19
Pre-start Quick Checklist
19
Starting the Unit in the Cooling Mode
19
Operating Pressures
19
Voltage Check
19
Cooling Shutdown
19
Starting the Unit in Heating Mode
20
Heating Shutdown
20
Sequence of Operation
20
General
20
Cooling Mode
20
Heating Mode
20
Final Inspection Checklist
20
Maintenance 20
Owner Maintenance
20
Service Maintenance
21
Cooling Season
21
Heating Season
21
ECM Fan Motor Adjustments
21
Step 1—Inspect Shipment
1. Check for damage after the unit is unloaded. Report promptly
to the carrier any damage found to the unit. Do not drop the
unit.
IMPORTANT:
To prevent damage to the sides and top of the
unit when hoisting, use “spreader bars” as shown on page 14.
2. Check the unit’s nameplate to determine if the unit is correct for
the intended application. The power supply must be adequate
for both the unit and all accessories.
3. Check to be sure the refrigerant charge has been retained
during shipment. Remove the Compressor access panel to
access the 1/4" flare pressure taps.
4. If this unit is being installed on a curb, verify that the correct
curb is provided with the unit.
•
4TCY4024 through 4TCY4036 use BAYCURB050A.
•
4TCY4042 through 4TCY4060 use BAYCURB051A.
5. If the unit is being hoisted, accessory kit BAYLIFT002A is
recommended. It includes a kit of four (4) lifting lugs and
instructions.
NOTE:
If practical, install any internal accessories to the unit
at the shop.
Summary of Contents for 4TCY4024
Page 5: ...Page 5 Installer s Guide Figure 2 4TCY4024 through 4TCY4036 2 of 3...
Page 6: ...Page 6 Installer s Guide Figure 3 4TCY4024 through 4TCY4036 3 of 3...
Page 8: ...Page 8 Installer s Guide Figure 5 4TCY4042 through 4TCY4060 2 of 3...
Page 9: ...Page 9 Installer s Guide Figure 6 4TCY4042 through 4TCY4060 3 of 3...
Page 18: ...Page 18 Installer s Guide Figure 20 Typical 4TCY4 Field Wiring Diagram...
Page 22: ...Page 22 Installer s Guide Notes...
