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CONTROL
BOX
ELECTRICAL
POWER
CONNECTION
TO NEC
DISCONNECT
LOW VOLTAGE
FROM INDOOR
CHILLER
CONTROL CIRCUIT
LEGEND
NEC — National Electrical Code
*Field supplied.
NOTES:
1. Wiring and piping shown are general points of connection guides
only and are not intended for or to include all details for a specific
installation.
2. All wiring must comply with applicable local and national codes.
3. All piping must follow standard piping techniques. Refer to Carrier
System Design Manual, Part 3, or the Carrier E20-II® Software
Refrigerant Piping program, for proper piping sizes and design.
4. Hot gas lines should rise above refrigerant level in condenser
circuit.
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HOT GAS LINES
(DOUBLE RISER IF REQUIRED)
SEE NOTE 4
PRESSURE
RELIEF DEVICE*
MOISTURE INDICATORS*
(SIGHT GLASS)
Fig. 5 — Typical Piping for 09AZ Condenser with a Dual Split System
Fig. 6 — 09AZ091-181 Header Detail
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SEE NOTE 7
FILTER DRIERS*
5. Trap should be installed on hot gas lines to prevent condenser
oil and refrigerant vapor migration from accumulating on com-
pressor heads during off cycle.
6. For piping lengths greater than 50 ft (15.2 m), provide support
to liquid and gas lines near the connections to the coil.
7. Pitch all horizontal lines downward in the direction of refrigerant
flow.
8. For pressure relief requirements, see latest revision of
ASHRAE (American Society of Heating, Refrigeration, and Air
Conditioning Engineers) Standard 15, Safety Code for Mechan-
ical Refrigeration.
8
SEE NOTE 3
DISCHARGE
GAS
FROM CHILLER
SHUT OFF*
VALVES
SEE NOTE 5
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