Carrier 48EZ(N)-A- Manual
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Table of Contents:
- Page 2 – INTRODUCTION; Step 1 — Check Equipment; CAUTION; except
- Page 5 – LARGE CURB; SMALL CURB; IMPORTANT
- Page 6 – Step 3 — Field Fabricate Ductwork; Step 5 — Rig and Place Unit; PERSONAL INJURY OR PROPERTY DAMAGE; WARNING; Inspection
- Page 7 – Step 6 — Connect Condensate Drain; Step 8 — Install Gas Piping
- Page 8 – OUT
- Page 9 – Step 9 — Install Duct Connections; Configuring Units for Downflow (Vertical) Discharge; ELECTRICAL SHOCK HAZARD; PROPERTY DAMAGE HAZARD; NOTE
- Page 11 – Table 2 – Maximum Gas Flow Capacity*; Table 3 – Heating Inputs
- Page 12 – Step 10 — Install Electrical Connections; Then
- Page 13 – FIRE, EXPLOSION HAZARD
- Page 14 – Step 1 — Check for Refrigerant Leaks; Step 2 — Unit Sequence of Operation; Heating Sequence of Operation; ments; UNIT COMPONENT DAMAGE HAZARD; Check Heating Control
- Page 15 – Check Gas Input; UNIT DAMAGE HAZARD; Adjust Gas Input; Pipe Plug
- Page 16 – FIRE AND UNIT DAMAGE HAZARD; Measure Manifold Pressure (Propane Units)
- Page 17 – Checking and Adjusting Refrigerant Charge; Indoor Airflow and Airflow Adjustments; Gas Heating Fan Speed Set-up
- Page 18 – Two Cooling Fan Speeds Set-up (Dehumidification; Continuous Fan Operation
- Page 32 – MAINTENANCE; Air Filter
- Page 34 – FEEDER TUBE; Outdoor Fan; UNIT OPERATION HAZARD; Electrical Controls and Wiring; Refrigerant Circuit
- Page 35 – Gas Input
- Page 37 – Accurater; LEGEND; Accurater; Refrigerant System
- Page 38 – TROUBLESHOOTING
- Page 39 – Table 12 – Troubleshooting Guide -- Cooling or Heat Pump Heating Mode
1
48EZ(N) --- A
Comfort
t
13 SEER Single --- Packaged HYBRID HEAT
r
Dual Fuel System with Puron
®
(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
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Fabricate Ductwork
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Condensate Drain
7
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Flue Hood
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Gas Piping
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Duct Connections
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Units for Downflow (Vertical)
Discharge
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections
12
. . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections
12
. . . . . . . . . . . . . . . . . . . . . . . .
Special Procedures for 208--V Operation
12
. . . . . . . . . . . . . .
Control Voltage Connections
13
. . . . . . . . . . . . . . . . . . . . . . .
Balance Point Setting Thermidistat or Hybrid Heat
Thermostat
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection
13
. . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP
13--14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP
14--17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Refrigerant Leaks
14
. . . . . . . . . . . . . . . . . . . . . . . . .
Unit Sequence of Operation
14
. . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Heating and Make Adjustments
14
. . . . . . . . . . . . . . .
Checking Heating Control
14
. . . . . . . . . . . . . . . . . . . . . . . . .
Check Gas Input
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Gas Input
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Burner Flame
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Cooling and Make Adjustments
16
. . . . . . . . . . . . . . .
Checking Cooling Control Operation
16
. . . . . . . . . . . . . . . .
Checking and Adjusting Refrigerant
17
. . . . . . . . . . . . . . . . .
Indoor Airflow and Airflow Adjustments
17
. . . . . . . . . . . . .
MAINTENANCE
32--38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower and Motor
32
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue Gas Passageways
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit Switch
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Ignition
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Burners
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan
33
. . . . . .
Outdoor Fan
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring
34
. . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A09034
Fig. 1 -- Unit 48EZ--A
Gas Input
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Airflow
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Defrost Thermostat
35
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron
R
Items
35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code
(NEC) NFPA 70.
In Canada refer to the current editions of the National Standards of
Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane
Installation codes, and Canadian Electrical Code CSA C22.1.
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which
will
result in severe personal injury
or death. WARNING signifies hazards which
could
result in per-
sonal injury or death. CAUTION is used to identify unsafe practic-
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