Hycomp Air Boosters, Руководство по установке и эксплуатации

Страница: 34 / 60

34
product data sheets. Field adjustable controls may
include the following.
Oil Pressure Switch
- This switch is set at the factory
to activate at approximately 16 PSIG falling pressure
for the ‘B’, ‘C’, ‘D’, ‘E’ and ‘V’ blocks, and at 38 PSIG
falling pressure for the ‘F’ block machines. Adjustment
is a simple matter of turning the dial clockwise (from
the top) to raise the setpoint, and counterclockwise
to lower the setpoint. If possible, remove the switch
and calibrate the setpoint with a regulated air supply
source. Otherwise use the oil pressure gauge to
determine setpoint.
Low Oil Pressure (LOP) Timer
- This timer relay is set
at the factory to bypass the oil pressure switch during
the
fi rst few seconds when starting up the compressor.
The timer is usually set for 6 to 10 seconds to give the
compressor time to build oil pressure (see Figure 21a).
Changes in oil viscosity or ambient temperature may
require minor timer adjustment.
Discharge Temperature Switch
- This switch is factory
set at 20-30°F above expected running temperature.
If ambient or running conditions change, this switch
may need adjustment. Never adjust the discharge
high temperature shutdown above 340°F. Contact the
factory if adjustments of more than 5% are required.
Gas Pressure Regulators
- Inlet suction pressure
regulators, unloader gas supply pressure regulators,
and discharge receiver tank regulators are all
fi eld
adjustable. Consult the factory if more than minor
adjustment is contemplated.
Thermal Regulating Valve
- On liquid cooled units,
this regulating valve is adjusted at the factory to provide
the required coolant
fl ow. Adjustment may be required
to accommodate actual fi eld conditions. Valve action
is open on temperature increase. Adjustment is made
via a screw located on the top of the valve to increase
valve opening in relation to the coolant temperature
(normally 115°F to 150°F range, 25°F minimum above
maximum gas inlet temperature). Coolant pressure
must not exceed 100 PSIG. The valve has an integral
bypass ori
fi ce to permit accurate opening response to
increasing fl uid temperatures.
Warning! – Hycomp compressors are uniquely
engineered for service specific application.
Consult the factory before any alteration of
process variables, i.e. gas makeup, inlet pressure,
discharge pressure, compressor speed, etc.
PRE-STARTUP CHECKLIST
Follow the pre-startup checklist.
Failure to perform
the pre-startup checklist or Installation Checklist
may result in property damage, injury and loss of
warranty
.
1. Remove all tools from the compressor and check
for installation debris. Loose tools/debris may
be thrown upon start-up and injure personnel.
2. Check motor pulley and compressor sheaves
for alignment and proper belt tension. Typically
1/4” to 3/8” belt de
fl ection is acceptable. Contact
the belt manufacturer for details on proper belt
tensions.
3. Manually rotate compressor sheave through
several full rotations to be sure there is no
mechanical interference felt.
4. Check all pressure connections for tightness.
5. Make sure all pressure relief valves are properly
installed and free to operate.
6. Be sure all belt guards are in place and
secure.
7. Check fuses, circuit breakers and thermal
overloads for proper sizing.
8. Open all manual shut-off valves downstream of
the compressor discharge.
9. Fill water cooling system (if applicable), and
check for leaks. Purge of air.
10. Check oil levels in crankcase. If low, fi ll with
a high quality non-detergent oil of the proper
viscosity.
11. Connect unit to a proper power source.
12. Turn the compressor on brie fl y (1-2 seconds)
to check the direction of rotation. Be sure it
agrees with the rotation arrow embossed on the
compressor sheave.
13. Fill out and return compressor start-up sheet
to the factory. This is required for warranty to
apply.