1
574D----A
LEGACY
t
13 SEER SINGLE--PACKAGED AIR CONDITIONER AND
GAS FURNACE SYSTEM WITH PURON
R
(R--410A) REFRIGERANT
SINGLE AND THREE PHASE
2--5 NOMINAL TONS (SIZES 24--60)
Installation Instructions
NOTE
:
Read the entire instruction manual before starting the
installation.
NOTE
:
Installer: Make sure the Owner’s Manual and Service
Instructions are left with the unit after installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS
1
. . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECEIVING AND INSTALLATION
2--12
. . . . . . . . . . . . . . . . .
Check Equipment
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identify Unit
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Shipment
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Unit Support
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roof Curb
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slab Mount
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Fabricate Ductwork
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rigging/Lifting
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Condensate Drain
9
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Flue Hood
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Gas Piping
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Duct Connections
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Units for Downflow (Vertical)
Discharge
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections
11
. . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections
11
. . . . . . . . . . . . . . . . . . . . . . . .
Special Procedures for 208--V Operation
12
. . . . . . . . . . . . . .
Control Voltage Connections
12
. . . . . . . . . . . . . . . . . . . . . . .
Standard Connection
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Anticipator Setting
12
. . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection
12
. . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP
13--21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Refrigerant Leaks
13
. . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Heating & Make Adjustments
13
. . . . . . . . . . . . . . . .
Check Heating Control
14
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Gas Input
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Gas Input
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Burner Flame
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Operation
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow and Temperature Rise
22
. . . . . . . . . . . . . . . . . . . . . .
Heating Sequence of Operation
22
. . . . . . . . . . . . . . . . . . . . .
Limit Switches
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rollout Switch
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Cooling & Make Adjustments
22
. . . . . . . . . . . . . . . .
Checking Cooling Control Operation
22
. . . . . . . . . . . . . . . .
Checking & Adjusting Refrigerant Charge
22
. . . . . . . . . . . .
Indoor Airflow and Airflow Adjustments
23
. . . . . . . . . . . . .
Continuous Fan Operation
23
. . . . . . . . . . . . . . . . . . . . . . . .
Cooling Sequence of Operation
24
. . . . . . . . . . . . . . . . . . . . .
MAINTENANCE
31--34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A09034
Fig. 1 -- Unit 574D----A
(Low NOx Model Available)
Indoor Blower and Motor
31
. . . . . . . . . . . . . . . . . . . . . . . . .
Induced Draft (Combustion Air) Blower
32
. . . . . . . . . . . . . .
Flue Gas Passageways
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit Switch
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Ignition
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Burners
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of Gas Train
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan
32
. . . .
Outdoor Fan
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring
34
. . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Input
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator Airflow
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron Items
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
VERTICAL ECONOMIZER
40--57
. . . . . . . . . . . . . . . . . . . . . . .
General
40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories
40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Small Chassis
40--41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Large Chassis
44--46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONFIGURATION
47--55
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION
56
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local
building codes, the current editions of the National Fuel Gas Code
Summary of Contents for 574D----A
Page 3: ...3 A09469 Fig 2 574D A24 36 Unit Dimensions 574D A ...
Page 4: ...4 A09470 Fig 3 574D A42 60 Unit Dimensions 574D A ...
Page 16: ...16 A09282 Fig 14 208 230 1 60 Connection Wiring Diagram 574D A ...
Page 17: ...17 A09282 Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram 574D A ...
Page 18: ...18 A09264 Fig 15 208 230 3 60 Connection Wiring Diagram 574D A ...
Page 19: ...19 A09264 Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram 574D A ...
Page 20: ...20 A09265 Fig 16 460 3 60 Connection Wiring Diagram 574D A ...
Page 21: ...21 A09265 Fig 16 Cont 460 3 60 Ladder Wiring Diagram 574D A ...
Page 25: ...25 Table 7 Cooling Charging Chart A08490 574D A ...
Page 50: ...50 A10098 Fig 45 Economizer Wiring Diagram 574D A ...
Page 51: ...51 A10075 Fig 46 Connection Wiring Diagram 230 3 574D A ...
Page 52: ...52 A10075 Fig 46 Cont Ladder Wiring Diagram 230 3 574D A ...
Page 53: ...53 A10087 Fig 47 Connection Wiring Diagram 460 3 574D A ...
Page 54: ...54 A10087 Fig 48 Ladder Wiring Diagram 460 3 574D A ...
Page 58: ...58 A10064 Fig 49 574D A 30 36 3 Phase with Economizer 574D A ...
Page 59: ...59 A10065 Fig 50 574D A 42 60 3 Phase with Economizer 574D A ...