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54
MAINTENANCE
6.12
PRESSURE ADJUSTMENT
The intervals at which the compressor loads and unloads, are controlled by adjustable settings within the T1
microprocessor.
The unload setting is typically 10 psi over the customer’s required system pressure
.
The
load pressure setting controls the set pressure. The Variable Frequency Drive (VFD) will speed up the motor
or slow it down to maintain the set pressure.
6.12.1
CHANGING LOAD AND UNLOAD PRESSURES
To change the load and unload pressures, access the P01 menu in the T1 microprocessor, then select the
PL or PU parameters. Raise or lower the settings by using the
+
or
-
buttons. Select
ENTER
to save the new
setting. The T1 microprocessor will keep a minimum of 3 psi between the load and unload pressures.
Summary of Contents for UD Series
Page 6: ...vi About This Manual ...
Page 12: ...4 Introduction ...
Page 42: ...34 Component Description ...
Page 52: ...44 Operation ...
Page 66: ...58 Troubleshooting ...
Page 74: ...66 Parts Catalog 8 5 COMPRESSOR FRAME AND DRIVE ASSEMBLY Figure 8 1 AS801 25UD 50UD VFD R00 ...
Page 76: ...68 Parts Catalog 8 6 CONTROL ASSEMBLY OPEN Figure 8 2 1072190415 609 R00 ...
Page 78: ...70 Parts Catalog 8 7 STARTER ASSEMBLY ENCLOSED Figure 8 3 AS802 405060 PANEL R03 ...
Page 94: ...86 Parts Catalog 8 15 COOLING ASSEMBLY AIR COOLED Figure 8 11 AS804 50UDAC INLINE R00 ...
Page 100: ...NOTES ...
Page 101: ...NOTES ...