95
Air Separation — For proper system operation, it is essential
that water loops be installed with proper means to manage air
in the system. Free air in the system can cause noise, reduce
terminal output, stop flow, or even cause pump failure due to
pump cavitation. For closed systems, equipment should be pro-
vided to eliminate all air from the system.
The amount of air that water can hold in solution depends on
the pressure and temperature of the water/air mixture. Air is
less soluble at higher temperatures and at lower pressures.
Therefore, separation can best be done at the point of highest
water temperature and lowest pressure. Typically, this point
would be on the suction side of the pump as the water is return-
ing from the system or terminals. This is generally the optimal
place to install an air separator, if possible.
1. Install automatic air vents at all high points in the system.
(If the 30XV unit is located at the high point of the
system, a vent can be installed on the piping leaving the
heat exchanger on the
1
/
4
in. NPT female port.)
2. Install an air separator in the water loop, at the place
where the water is at higher temperatures and lower pres-
sures — usually in the chilled water return piping. On a
primary-secondary system, the highest temperature water
is normally in the secondary loop, close to the decoupler.
Preference should be given to that point on the system
(see Fig. 36). In-line or centrifugal air separators are read-
ily available in the field.
If it is not possible to install air separators at the place of the
highest temperature and lowest pressure, preference should be
given to the points of highest temperature. It is important that
the pipe be sized correctly so that free air can be moved to the
point of separation. Generally, a water velocity of at least 2 feet
per second (0.6 m per second) will keep free air entrained and
prevent it from forming air pockets.
Automatic vents should be installed at all physically elevated
points in the system so that air can be eliminated during system
operation. Provisions should also be made for manual venting
during the water loop fill.
Units Field Piping — When facing the evaporator side of the
unit, the inlet (return) water connection is on the bottom. It is
required that a field-supplied strainer with a minimum size of
20 mesh be installed within 10 ft (3.05 m) of the evaporator
inlet to prevent debris from damaging internal tubes of the
evaporator. The outlet (supply) water connection is on the top.
When single pass evaporator is selected, it will have nozzles
on either end of the evaporator. The nozzle opposite the control
box side is entering water. The evaporator has water-side
Victaulic-type connections (follow connection directions as
provided by the coupling manufacturer). Provide proper sup-
port for the piping. If accessory security grilles have been
added, holes must be cut in the grilles for field piping and insu-
lation. See Fig. 37 for a typical piping diagram of a 30XV unit
with Greenspeed
®
intelligence. A drain connection is located at
the leaving water (supply) end of evaporator. See Fig. 2-20 for
connection location. Insulate the drain piping (in the same
manner as the chilled water piping) for at least 12 in. (305 mm)
from the unit.
Dual Chiller Control — The Touch Pilot
™
controller allows 2
chillers (piped in parallel or series) to operate as a single chilled
water plant with standard control functions coordinated through
the master chiller controller. This standard Touch Pilot feature re-
quires a communication link between the 2 chillers on the CCN
bus.
Dual Chiller Leaving Water Sensor — If the dual chiller al-
gorithm is used, and the machines are installed in parallel, a
dual chilled water sensor must be installed for each module. In-
stall the well in the common leaving water header. See Fig. 38.
The connection size for the thermowell is
1
/
4
in. npt. A dual
chiller accessory kit (P/N 00EFN900005600A) is available.
Parallel Dual Chiller Operation — Parallel chiller operation
is the recommended option for dual chiller control. In this case,
each chiller must control its own dedicated pump or isolation
valve. Balancing valves are recommended to ensure proper
flow in each chiller. Two field-supplied and installed dual
chiller leaving water temperature sensors are required, one for
each module, for this function to operate properly.
Consider adding additional isolation valves to isolate each
chiller to allow for service on a machine, and still allow for
partial capacity from the other chiller. See Fig 38.
Dual Chiller Operation — Series chiller operation is an alternate
control method supported by the Touch Pilot
™
control system.
Certain applications might require that the two chillers be con-
nected in series.
Consider adding additional piping and isolation valves to iso-
late each chiller to allow for service on a machine, and still
allow for partial capacity from the other chiller. See Fig. 39.
Fig. 34 — Flow Switch Location
FLOW
S
WITCH
a30-3185
BAD
BAD
GOOD
GOOD
Fig. 35 — Tank Baffling
Summary of Contents for 30XV140-500
Page 5: ...5 Fig 2 30XV 140 160 180 Std Tier 140 Mid Tier Air Cooled Chiller...
Page 6: ...6 Fig 2 30XV 140 160 180 Std Tier 140 Mid Tier Air Cooled Chiller cont...
Page 7: ...7 Fig 2 30XV 140 160 180 Std Tier 140 Mid Tier Air Cooled Chiller cont...
Page 8: ...8 Fig 3 30XV 140 High Tier 160 180 Mid Tier 200 Std Tier Air Cooled Chiller...
Page 9: ...9 Fig 3 30XV 140 High Tier 160 180 Mid Tier 200 Std Tier Air Cooled Chiller cont...
Page 10: ...10 Fig 3 30XV 140 High Tier 160 180 Mid Tier 200 Std Tier Air Cooled Chiller cont...
Page 11: ...11 Fig 4 30XV 160 180 High Tier 200 Mid Tier Air Cooled Chiller...
Page 12: ...12 Fig 4 30XV 160 180 High Tier 200 Mid Tier Air Cooled Chiller cont...
Page 13: ...13 Fig 4 30XV 160 180 High Tier 200 Mid Tier Air Cooled Chiller cont...
Page 14: ...14 Fig 5 30XV 200 High Tier Air Cooled Chiller...
Page 15: ...15 Fig 5 30XV 200 High Tier Air Cooled Chiller cont...
Page 16: ...16 Fig 5 30XV 200 High Tier Air Cooled Chiller cont...
Page 17: ...17 Fig 6 30XV 225 Std Tier Air Cooled Chiller...
Page 18: ...18 Fig 6 30XV 225 Std Tier Air Cooled Chiller cont...
Page 19: ...19 Fig 6 30XV 225 Std Tier Air Cooled Chiller cont...
Page 20: ...20 Fig 7 30XV 225 Mid Tier Air Cooled Chiller...
Page 21: ...21 Fig 7 30XV 225 Mid Tier Air Cooled Chiller cont...
Page 22: ...22 Fig 7 30XV 225 Mid Tier Air Cooled Chiller cont...
Page 23: ...23 Fig 8 30XV 225 High Tier Air Cooled Chiller...
Page 24: ...24 Fig 8 30XV 225 High Tier Air Cooled Chiller cont...
Page 25: ...25 Fig 8 30XV 225 High Tier Air Cooled Chiller cont...
Page 26: ...26 Fig 9 30XV 250 275 Std Tier Air Cooled Chiller...
Page 27: ...27 Fig 9 30XV 250 275 Std Tier Air Cooled Chiller cont...
Page 28: ...28 Fig 9 30XV 250 275 Std Tier Air Cooled Chiller cont...
Page 29: ...29 Fig 10 30XV 250 275 Mid Tier 300 Std Tier Air Cooled Chiller...
Page 30: ...30 Fig 10 30XV 250 275 Mid Tier 300 Std Tier Air Cooled Chiller cont...
Page 31: ...31 Fig 10 30XV 250 275 Mid Tier 300 Std Tier Air Cooled Chiller cont...
Page 32: ...32 Fig 11 30XV 250 275 High Tier 300 Mid Tier 325 Std Tier Air Cooled Chiller...
Page 33: ...33 Fig 11 30XV 250 275 High Tier 300 Mid Tier 325 Std Tier Air Cooled Chiller cont...
Page 34: ...34 Fig 11 30XV 250 275 High Tier 300 Mid Tier 325 Std Tier Air Cooled Chiller cont...
Page 35: ...35 Fig 12 30XV 300 High Tier 325 Mid Tier Air Cooled Chiller...
Page 36: ...36 Fig 12 30XV 300 High Tier 325 Mid Tier Air Cooled Chiller cont...
Page 37: ...37 Fig 12 30XV 300 High Tier 325 Mid Tier Air Cooled Chiller cont...
Page 38: ...38 Fig 13 30XV 325 High Tier Air Cooled Chiller...
Page 39: ...39 Fig 13 30XV 325 High Tier Air Cooled Chiller cont...
Page 40: ...40 Fig 13 30XV 325 High Tier Air Cooled Chiller cont...
Page 41: ...41 Fig 14 30XV 350 Standard Tier Air Cooled Chiller...
Page 42: ...42 Fig 14 30XV 350 Standard Tier Air Cooled Chiller cont...
Page 43: ...43 Fig 14 30XV 350 Standard Tier Air Cooled Chiller cont...
Page 44: ...44 Fig 15 30XV 350 Mid Tier Air Cooled Chiller...
Page 45: ...45 Fig 15 30XV 350 Mid Tier Air Cooled Chiller cont...
Page 46: ...46 Fig 15 30XV 350 Mid Tier Air Cooled Chiller cont...
Page 47: ...47 Fig 16 30XV 350 High Tier Air Cooled Chiller...
Page 48: ...48 Fig 16 30XV 350 High Tier Air Cooled Chiller cont...
Page 49: ...49 Fig 16 30XV 350 High Tier Air Cooled Chiller cont...
Page 50: ...50 Fig 17 30XV 400 Standard Tier Air Cooled Chiller...
Page 51: ...51 Fig 17 30XV 400 Standard Tier Air Cooled Chiller cont...
Page 52: ...52 Fig 17 30XV 400 Standard Tier Air Cooled Chiller cont...
Page 53: ...53 Fig 18 30XV 400 Mid 450 Standard Tier Air Cooled Chiller...
Page 54: ...54 Fig 18 30XV 400 Mid 450 Standard Tier Air Cooled Chiller cont...
Page 55: ...55 Fig 18 30XV 400 Mid 450 Standard Tier Air Cooled Chiller cont...
Page 56: ...56 Fig 19 30XV 400 High 450 Mid 500 Std Tier Air Cooled Chiller...
Page 57: ...57 Fig 19 30XV 400 High 450 Mid 500 Std Tier Air Cooled Chiller cont...
Page 58: ...58 Fig 19 30XV 400 High 450 Mid 500 Std Tier Air Cooled Chiller cont...
Page 59: ...59 Fig 20 30XV 450 High 500 Mid Tier Air Cooled Chiller...
Page 60: ...60 Fig 20 30XV 450 High 500 Mid Tier Air Cooled Chiller cont...
Page 61: ...61 Fig 20 30XV 450 High 500 Mid Tier Air Cooled Chiller cont...
Page 62: ...62 Fig 21 30XV Split Unit 40A B High 45A B Mid 50A B Standard Tier Air Cooled Chiller...
Page 63: ...63 Fig 21 30XV Split Unit 40A B High 45A B Mid 50A B Standard Tier Air Cooled Chiller cont...
Page 64: ...64 Fig 21 30XV Split Unit 40A B High 45A B Mid 500A B Standard Tier Air Cooled Chiller cont...
Page 65: ...65 Fig 22 30XV Split Unit 45A B High 50A B Mid Tier Air Cooled Chiller...
Page 66: ...66 Fig 22 30XV Split Unit 45A B High 50A B Mid Tier Air Cooled Chiller cont...
Page 67: ...67 Fig 22 30XV Split Unit 45A B High 50A B Mid Tier Air Cooled Chiller cont...
Page 103: ...103 Fig 44 Field Control and Power Wiring...
Page 104: ...104 Fig 44 Field Control and Power Wiring cont...