Honeywell WP230A-M, Service Data

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7 4 8 3 X
A I R U N L O A D E R
A S S E M B L Y
- H E A D
WP230-n
Fig. 7. Air Unloading of Intake Valves on 3/4 HP Units.
Disconnect power and loosen motor clamping bolts
and slide motor towards unit. If the compressor has a
totally enclosed belt guard, it will have to be removed.
Remove and replace belts. Motor should be held snug
against belts when retightening so that the belt(s) do not
have
more than 1/2 inch (12 mm) total play. Make
certain alignment is correct, reinstall guard and turn on
power.
NOTE: Sometimes new belts stretch excessively after
being installed; recheck after one week. See
Data Table.
If motor is considered Af fective, disconnect power
and replace motor. When installing motor, reset belt
tension.
Many motors are dual voltage. Check motor
internal wiring against diagrams on motor or inside
of wiring cover plate for proper connections for
voltage being used.
INTAKE AND EXHAUST VALVES, UNLOADER
The intake valves, exhaust valves, and unloader
mechanisms can be disassembled for inspection, clean-
ing, or repair in all sizes except the 1/2 HP, The 1/2 HP
unit is a sealed assembly
in
the head. In the event the
valves are deemed defective in this unit, replace the head
assembly (Quincy Part No. 2400-X2P).
On the 1/4 HP unit, remove the two valve locking
nuts in the head and the valve parts can now be removed
for inspection. See Figure 5 for proper order of re-
assembly. The 1/4 and 1/2 HP units
have
check valve on
the pressure switch and an unloader.
The 3/4 HP unit and larger units have automatic
unloaders on intake valve(s). The unloader for the 1 HP
unit is shown in Figure 6. All other units (3/4 HP and
up) use the unloader shown in Figure 7. Access to the
intake valves is gained by unscrewing the unloaders from
the head assembly. Exhaust valves can be removed by
unscrewing the hold down caps covering them. See the
Parts
List
for the replacement numbers for these units.
Fig. 8, Three-Way Valve Assembly HP).
Fig. 9. Hydraulic Unloader Assembly.
9
75-7131