27
Fig. 26 — Typical Piping and Wiring, 30MPA Unit with 09DP Remote Air-Cooled Condenser Shown
LIQUID
HOT GA
S
CHILLED FLUID PIPING
NOTES:
1. Chiller must
b
e 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
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 software Refrigerant Piping program, or appropriate
ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engi-
neers) hand
b
ook for details on proper piping sizes and design.
5. See product data 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. With 30MPA/
09DP matched condensers, this is accomplished internally in the 09DP unit. Dou
b
le
riser may
b
e re
q
uired; Check 30MPA line sizing chart.
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 refrigerant flow.
9. For piping lengths greater than 50 ft (15 m), 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 Refrigeration.
11. Operating environment — Chiller should
b
e installed in an indoor environment where
the am
b
ient temperature is
b
etween 40 to 104°F (4 to 40°C) with a relative humidity
(non-condensing) of 95% or less. To ensure that electrical components operate
properly, do not locate the chiller in an area exposed to dust, dirt, corrosive fumes, or
excessive heat and humidity.
12. Inverted trap re
q
uired at condenser for 09DPM065-130.
