1
674D
LEGACY
t
13 SEER SINGLE--PACKAGED HYBRID HEAT DUAL FUEL
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--2
. . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECEIVING AND INSTALLATION
2--13
. . . . . . . . . . . . . . . . .
Check Equipment
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identify Unit
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Shipment
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Unit Support
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roof Curb
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slab Mount
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Fabricate Ductwork
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Condensate Drain
7
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Flue Hood
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Gas Piping
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Duct Connections
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Units for Downflow (Vertical)
Discharge
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections
12
. . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections
12
. . . . . . . . . . . . . . . . . . . . . . . .
Special Procedures for 208--V Operation
12
. . . . . . . . . . . . . .
Control Voltage Connections
12
. . . . . . . . . . . . . . . . . . . . . . .
Balance Point Setting Thermidistat or Hybrid Heat
Thermostat
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection
13
. . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP
14--17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Refrigerant Leaks
14
. . . . . . . . . . . . . . . . . . . . . . . . .
Unit Sequence of Operation
14
. . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Heating and Make Adjustments
14
. . . . . . . . . . . . . . .
Checking Heating Control
15
. . . . . . . . . . . . . . . . . . . . . . . . .
Check Gas Input
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Gas Input
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Burner Flame
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Cooling and Make Adjustments
18
. . . . . . . . . . . . . . .
Physical Data
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Cooling Control Operation
17
. . . . . . . . . . . . . . . .
Checking and Adjusting Refrigerant
17
. . . . . . . . . . . . . . . . .
Indoor Airflow and Airflow Adjustments
17
. . . . . . . . . . . . .
MAINTENANCE
29--34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower and Motor
29
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue Gas Passageways
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit Switch
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Ignition
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Burners
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan
30
. . . . . .
A09034
Fig. 1 -- Unit 674D----A
Outdoor Fan
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring
31
. . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Input
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Airflow
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Defrost Thermostat
32
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron
R
Items
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
VERTICAL ECONOMIZER
39--56
. . . . . . . . . . . . . . . . . . . . . . .
General
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
39--45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Small Chassis
39--40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Large Chassis
43--45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONFIGURATION
46--52
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION
53
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Installation and servicing of this equipment can be hazardous due
to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on
labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have 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
Содержание Legacy 674D
Страница 3: ...3 A09473 Fig 2 674D A24 36 Unit Dimensions 674D A...
Страница 4: ...4 A09474 Fig 3 674D A42 60 Unit Dimensions 674D A...
Страница 24: ...24 A10207C Fig 14 208 230 1 60 Connection Wiring Diagram Unit 674D 674D A...
Страница 25: ...25 A10207L Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram Unit 674D A 674D A...
Страница 26: ...26 A10208C Fig 15 208 230 3 60 Connection Wiring Diagram Unit 674D A 674D A...
Страница 27: ...27 A10208L Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram Unit 674D A 674D A...
Страница 28: ...28 A08019 Fig 16 Cooling Charging Table Subcooling 674D A...
Страница 49: ...49 A10059 Fig 49 Economizer Wiring Diagram 674D A...