FORM 150.24-NM27
YORK INTERNATIONAL
21
REMOTE CONDENSER APPLICATION
The YCR units are sold less the self-contained shell
and tube condenser for use with remote condensers,
which may be of the air cooled type. The following guide-
lines should be followed:
1. Remote refrigerant lines shall not exceed 100 ft. of
equivalent length each for discharge and liquid to
achieve listed ratings.
2. Liquid lines and discharge lines shall be steel and
sized to match the connection sizes shown in Dl-
MENSIONS.
3. Minimum capacity is as shown in PHYSICAL DATA.
4. Liquid chiller, air cooled condenser and connecting
lines are located on the same elevation with hori-
zontal runs only or with condenser at elevated posi-
tion and proper means provided for head control and
prevention of operating problems associated with low
ambients. Vertical discharge pipes must be prop-
erly sized to ensure oil return. In some installations,
particularly ones with compressors unloading to a
small percentage of full load, it may be necessary to
use a double pipe riser.
5. Piping shall be as direct as possible limited by Items
#1 and #4. Any other configurations shall be referred
to YORK for application information.
6. Do not use a liquid receiver unless proper refrigerant
subcooling is maintained at the expansion valve. One
way to acheive this subcooling is to locate an
air-cooled heat-exchanger between the receiver and
the expansion valve. This heat exchanger should cool
refrigerant liquid to at least 10°F below the satura-
tion temperature. Another way to assure subcooling
is to locate the receiver at least 15 feet above the
expansion valve. This arrangement provides a liquid
column which raises the pressure of the refrigerant
above the saturation pressure and thus assures
proper subcooling at the expansion valve.
7. The condenser must provide liquid subcooling of 10°F
measured at the condenser outlet.
8. Remote air cooled condensers with reciprocating wa-
ter chillers require the proper design of intercon-
necting piping using accepted refrigeration piping
practice (as outlined in ASHRAE handbooks) and
proper head pressure control measures for all am-
bient temperatures that could occur. For multiple
units, additional measures must be taken as neces-
sary for satisfactory performance.
9. Minimum saturated condensing temperature to
achieve ratings is 80°F. The air cooled condenser
fan controls or other appropriate head pressure con-
trol devices must be provided using accepted refrig-
erant system practice.
10. Use discharge line check valves recommended in
Chapter 26 of ASHRAE Systems Handbook.
11. Piping must utilize appropriate supports and anchoring
to prevent the amplification of compressor discharge
gas pulsations and mechanical vibrations. Allowance
should be made for thermal expansion and contrac-
tion using appropriate elbows and three dimensional
piping configurations.
12. There must be a minimum of 15 pipe diameters of
piping between the compressor and the first pipe
support on both the discharge and suction lines. The
piping must be fully supported by appropriate hang-
ers, etc. without imposing its weight or moments on
the compressor.
13. Suction and discharge lines should be supported on
5-foot intervals. Small refrigerant or control piping
should be supported at 3-foot intervals. Controls must
be independently mounted; not supported by the con-
trol piping. A thin layer of resilient material (such as
FIG. 6
CONDENSER WATER PIPING -
COOLING TOWER
LD02351
Summary of Contents for YCWJ45EE0
Page 29: ...FORM 150 24 NM27 YORK INTERNATIONAL 29 CONTROL CIRCUIT With I O Expansion Board LD02106...
Page 30: ...30 YORK INTERNATIONAL FIG 9 SYSTEM WIRING...
Page 31: ...FORM 150 24 NM27 YORK INTERNATIONAL 31 LD02678...
Page 35: ...FORM 150 24 NM27 YORK INTERNATIONAL 35 LD02679...
Page 36: ...36 YORK INTERNATIONAL MICROPANEL CONNECTION DIAGRAM With I O Expansion Board LD02107...
Page 37: ...FORM 150 24 NM27 YORK INTERNATIONAL 37 LD02108...