4: Installation 3000PB, 3700B, 4500B, 3000PVB, 3700VB, 4500VB User Manual
02250216-786 R01
44 Subject to EAR, ECCN EAR99 and related export control restrictions.
utilizing an aftercooler. Cooler water will reduce water-
flow requirements and warmer water will increase water-
flow requirements.
Water piping to and from the compressor unit must be a
minimum of 1 inch diameter. Isolation valves with side
d
rains should be installed on both input and return lines.
Input water should have a 2 mm strainer installed in-line.
A no
rmally closed solenoid valve should be connected to
the water outlet of the compressor. The compressor con-
trol circuit switches this circuit.
Consult the Sullair Service
Department for assistance in these setups.
Water quality is critical to proper cooling of the compres-
sor. Excessive build-up of lime, scale or other deposits
can
restrict the flow of water to the compressor. These
deposits act as a thermal insulator and reduce the effi-
ciency of the water cooler.
The cleaning of piping and water coolers is the cus-
tomer’s responsibility. Inspect all piping for deposits and
clean as
necessary. Refer to Section 4.2.5: Water quality
recommendations on
page 45.
Table 4-2: Ventilation requirements indicates the mini-
mum ventilation requirements necessary to keep the
com
pressor running at its normal operating temperature.
The fan air requirement is the amount of air, which must
flow through the compressor for proper ventilation. The
heat rejection requirement is the amount of heat that is
radiated by the compressor. This heat must be removed
to assure a normal operating temperature. With air-
cooled compressors it is possible to use this heat for
space heating, providing additional pressure drop across
the fan does not exceed 0.2 in H
2
O. Consult a Sullair
office for assistance in utilizing this heat. If ductwork is
added, the high static fan option is required.
Do not in
stall a water-cooled or an air-cooled/after-
cooled compressor where it will be exposed to tempera-
tures less than 32°F (0°C). Consult factory for machine
op
eration in ambient temperature less than 32°F (0°C).
If machine is equipped with wat
er regulating valve, use
the water regulating valve to adjust compressor tempera-
ture to maintain a minimum of 180°F (82.2°C); 190°F
(
87.8°C) for 24KT
®
.
Temperature and pressure gauges should be installed in
the
water piping for use in troubleshooting of the water
system. Water pressure should ideally be between 25
and 75 psig (1.7 and 5.2 bar) but must not be above
14
5 psi (10 bar).
4.2.3 Water system venting
Vent the system upon installation or after draining the
system on start-up:
1. Open the water valve(s) allowing water to
flow
to the system.
2. Open the vent cocks (located on top of the
aftercooler and the lubricant cooler) and
allow all air to escape from the system.
When water is observed at the vent cocks,
close them.
The system is now vented.
4.2.4 Draining the water system
If the system needs to drained completely, follow the
steps outlined below:
Table 4-1: Water flow requirements
Motor size
Water temperature and
required water flow
1
70°F (21°C) 80°F (27°C)
gal/min L/min gal/min L/min
40 hp (30 kW) 5.6 21.2 8.4 31.8
50 hp (37 KW) 7.0 26.5 10.5 39.7
60 hp (45 kW) 9.0 34.1 11.5 43.5
1
Water pressure should be maintained between 25 and 75 psig (1.7
and 5.2 bar), but not to exceed 145 psig (10 bar).
Table 4-2: Ventilation requirements
Cooling type Motor size
Fan air
Ventilating air—
heat rejection
Cooling water—
heat rejection
cfm m
3
/h BTU/h kcal/h BTU/h kcal/h
Air-cooled with aftercooler
40 hp (30 kw) 4,000 6,796 114,500 28,800 — —
50 hp (37 kW) 4,000 6,796 142,000 35,700 — —
60 hp (45 kW) 5,500 9,345 171,000 46,216 — —
Water-cooled
40 hp (30 kw) 730 1,240 10,600 2,670 114,500 28,800
50 hp (37 kW) 730 1,240 13,300 3,350 142,000 35,700
60 hp (45 kW) 730 1,240 15,800 4,000 171,100 43,040
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