9
Fig. 9 — Typical Piping with 30MPA Unit and 09DP Remote Air-Cooled Condenser
a30-5409
NOTES:
1. Chiller must
b
e installed level 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
q
uick overview of system
and are not in accordance with recognized standards.
3. All wiring must comply with applica
b
le local and national
codes.
4. All piping must follow standard piping techni
q
ues. Refer to
Carrier System Design Manual part 3, Carrier E20-II
®
soft-
ware Refrigerant Piping program, or appropriate ASHRAE
(American Society of Heating, Refrigerating, and Air Condi-
tioning Engineers) hand
b
ook for details on proper piping sizes
and design.
5. See Ta
b
les 1A and 1B for minimum system fluid volume. This
system may re
q
uire the addition of a holding tank to ensure
ade
q
uate volume.
6. Hot gas lines should rise a
b
ove refrigerant level in condenser
circuit. Dou
b
le riser may
b
e re
q
uired; check unit minimum
capacity.
7. Trap should
b
e installed on hot gas lines to prevent condenser
oil and refrigerant vapor migration from accumulating in the
compressor during off cycle.
8
. Pitch all horizontal lines downward in the direction of refriger-
ant flow.
9. For piping lengths greater than 50 ft, provide support to li
q
uid
and gas lines near the connections to the condenser coil.
10. For pressure relief re
q
uirements, see latest revision of
ASHRAE Standard 15, Safety Code for Mechanical Refrigera-
tion.
