Water System Venting; Draining The Water System - Sullair 3000PB User Manual

40, 50 & 60 hp (30, 37 & 45 kw)

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Table Of Contents

Table of Contents

4: Installation

utilizing an aftercooler. Cooler water will reduce water-

flow requirements and warmer water will increase water-

flow requirements.

Table 4-1: Water flow requirements

70°F (21°C)

Motor size

gal/min

40 hp (30 kW)

5.6

50 hp (37 KW)

7.0

60 hp (45 kW)

9.0

Water pressure should be maintained between 25 and 75 psig (1.7

and 5.2 bar), but not to exceed 145 psig (10 bar).

Water piping to and from the compressor unit must be a

minimum of 1 inch diameter. Isolation valves with side

drains should be installed on both input and return lines.

Input water should have a 2 mm strainer installed in-line.

A normally 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

compressor 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

Table 4-2: Ventilation requirements

Cooling type

Air-cooled with aftercooler

Water-cooled

3000PB, 3700B, 4500B, 3000PVB, 3700VB, 4500VB User Manual

Water temperature and

required water flow

80°F (27°C)

L/min

gal/min

L/min

21.2

8.4

26.5

10.5

34.1

11.5

Motor size

cfm

40 hp (30 kw)

4,000

50 hp (37 kW)

4,000

60 hp (45 kW)

5,500

40 hp (30 kw)

730

50 hp (37 kW)

730

60 hp (45 kW)

730

Subject to EAR, ECCN EAR99 and related export control restrictions.

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

office for assistance in utilizing this heat. If ductwork is

added, the high static fan option is required.

Do not install a water-cooled or an air-cooled/after-

cooled compressor where it will be exposed to tempera-

31.8

tures less than 32°F (0°C). Consult factory for machine

39.7

operation in ambient temperature less than 32°F (0°C).

43.5

If machine is equipped with water 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

145 psi (10 bar).

4.2.3