Chapter 5 Maintenance and Inspection
UD-series Screw Compressor 5.4 Disassembly and Inspection
5-14
5.4 Disassembly and Inspection
5.4.1 Unloader Indicator Block
The UD/G-series unloader indicator has been changed to the new
type indicator (right picture) with the protection grade IP66 by
improving the performance of the dust and water proof from
December 2014 Moriya factory production.
This new indicator IND-052WP and IND-062WP are nearly same to
the traditional indicator in the following items: outer dimensions,
mounting method to the compressor, signal output of the loaded
capacity 0 % to 100 % by using a potentiometer, and contact output
function by using micro-switches.
Major changes (improvements) are described in Table 5-6.
Table 5-6 Difference of Unloader Indicator between old type and new type
Item Traditional type New type
Dust and water proof Equivalent to
protection grade IP20
Protection grade IP66
Quantity of housing parts 2 4
Potentiometer Wire wound type Conductive plastic
Micro-switch Wiring is screwed. Wiring is connected with connector
Terminal block 6P terminals 7P terminals
For more details of the new type indicator IND-052WP, refer to the another dedicated instruction
manual “2200TYJJ-DA-S11-N-2016.11 Unloader indicator IND-05”.
As the transition period after change of the unloader indicator, the traditional type indicator is described
as the target.
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