Carrier 48EZ-A- User Manual
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Table of Contents:
- Page 2 – INTRODUCTION; Step 1 — Check Equipment; CAUTION; except; Step 3 — Field Fabricate Ductwork
- Page 5 – LARGE CURB; SMALL CURB; IMPORTANT; : Do not install large base pan HYBRID HEAT
- Page 6 – Step 4 — Provide Clearances; Step 5 — Rig and Place Unit; PERSONAL INJURY OR PROPERTY DAMAGE; WARNING
- Page 7 – Inspection; Step 6 — Connect Condensate Drain; Step 8 — Install Gas Piping
- Page 8 – OUT
- Page 10 – Table 2 – Maximum Gas Flow Capacity*; Table 3 – Heating Inputs
- Page 11 – Step 9 — Install Duct Connections; Configuring Units for Downflow (Vertical) Discharge
- Page 12 – Return Duct Panels; Supply Duct Panels
- Page 13 – Step 10 — Install Electrical Connections; UNIT COMPONENT DAMAGE HAZARD; ELECTRICAL SHOCK HAZARD; ELECTRICAL SHOCK AND EXPLOSION HAZARD; Then; Control Voltage Connections
- Page 14 – Balance Point Setting--Thermidistat or Hybrid; FIRE, EXPLOSION HAZARD
- Page 15 – Step 1 — Check for Refrigerant Leaks; NOTE; Step 2 — Unit Sequence of Operation; Heating Sequence of Operation; NOTE; ments; NOTE
- Page 16 – Check Heating Control; UNIT DAMAGE HAZARD; Adjust Gas Input
- Page 17 – FIRE AND UNIT DAMAGE HAZARD; Measure Manifold Pressure (Propane Units); Check Burner Flame; Table 5 – LED Indications; Rollout Switch
- Page 18 – Checking Cooling Control Operation; Indoor Airflow and Airflow Adjustments
- Page 19 – Continuous Fan Operation
- Page 28 – MAINTENANCE; Air Filter
- Page 30 – FEEDER TUBE; Outdoor Fan; UNIT OPERATION HAZARD; Electrical Controls and Wiring; Refrigerant Circuit
- Page 31 – Gas Input
- Page 33 – Accurater; LEGEND; Accurater; Refrigerant System
- Page 34 – TROUBLESHOOTING
- Page 35 – Table 11 – Troubleshooting Guide -- Cooling or Heat Pump Heating Mode
1
48EZ(N) --- A
Comfort
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
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Fabricate Ductwork
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Condensate Drain
7
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Flue Hood
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Gas Piping
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Duct Connections
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Units for Downflow (Vertical)
Discharge
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections
13
. . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections
13
. . . . . . . . . . . . . . . . . . . . . . . .
Special Procedures for 208--V Operation
13
. . . . . . . . . . . . . .
Control Voltage Connections
13
. . . . . . . . . . . . . . . . . . . . . . .
Balance Point Setting Thermidistat or Hybrid Heat
Thermostat
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection
13
. . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP
15--18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Refrigerant Leaks
15
. . . . . . . . . . . . . . . . . . . . . . . . .
Unit Sequence of Operation
15
. . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Heating and Make Adjustments
15
. . . . . . . . . . . . . . .
Checking Heating Control
16
. . . . . . . . . . . . . . . . . . . . . . . . .
Check Gas Input
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Gas Input
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Burner Flame
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Cooling and Make Adjustments
18
. . . . . . . . . . . . . . .
Checking Cooling Control Operation
18
. . . . . . . . . . . . . . . .
Checking and Adjusting Refrigerant
18
. . . . . . . . . . . . . . . . .
Indoor Airflow and Airflow Adjustments
18
. . . . . . . . . . . . .
MAINTENANCE
28--34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower and Motor
28
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue Gas Passageways
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit Switch
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Ignition
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Burners
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan
29
. . . . . .
A09034
Fig. 1 -- Unit 48EZ--A
Outdoor Fan
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring
30
. . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Input
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Airflow
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Defrost Thermostat
31
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron
R
Items
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
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2 words are used with the safety--alert symbol. DANGER identifiesthe 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- es which may result in minor persona...
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