17
FIELD
POWER
SUPPLY
CONTROL
WIRING
CONTROL
WIRING
09DP
CONDENSER
DOUBLE
HOT GAS
RISER MAY
BE
REQUIRED
LIQUID
LINE
RELIEF
VALVE (IF
REQUIRED
BY CODE)
HOT GAS LINE
a38-7098_gs
Fig. 11 — Typical 30MPA Refrigerant Piping to 09DP Remote Condenser
(30MPA030 and 09DPS030 Units Shown)
NOTES:
1. Chiller and condenser must be installed
levelly
to maintain proper
compressor oil return.
2. Wiring and piping shown are general points-of-connection guides
only and are not intended for a specific installation. Wiring and
piping shown are for a quick overview of system and are not in
accordance with recognized standards.
3. All wiring must comply with applicable local and national codes.
4. All piping must follow standard piping techniques. Refer to Carrier
System Design Manual part 3, Carrier E20-II software Refrigerant
Piping program, or appropriate ASHRAE (American Society of
Heating, Refrigerating, and Air Conditioning Engineers) hand-
book for details on proper piping sizes and design.
5. See Tables 1-6 for approximate refrigerant charge.
6. Double discharge riser may be required; check unit minimum
capacity.
7. Trap should be installed on hot gas lines to prevent condenser oil
and refrigerant vapor migration from accumulating in the com-
pressor during off cycle.
8. Pitch all horizontal lines downward in the direction of refrigerant
flow.
9. For piping lengths greater than 100 ft (30 m), provide discharge
line check valve.
10. For pressure relief requirements, see latest revision of ASHRAE
Standard 15, Safety Code for Mechanical Refrigeration.
11. All 09DP units have factory-installed contactors.
a09-589
