27
4.12 COOLANT TYPE CHANGE
OBJECTIVE
To drain coolant from compressor as completely as
possible when changing types of coolant to avoid cont-
amination or dilution of new fluid.
CAUTION
If optional Ultra Coolant is used, it is not compati-
ble with certain “Compressor Conditioner” fluids
often utilized to remove varnish deposits from
machines running on petroleum products. Addition
of these products to Ultra Coolant can lead to
plugged filters and bearing lines, potentially lead-
ing to severe mechanical problems. Therefore, do
not flush the compressor system with a
“Compressor Conditioner” prior to filling with Ultra
Coolant.
ITEMS REQUIRED
In addition to the tools normally found in any reason-
ably equipped serviceman’s toolbox, the following
items should be available at the work site:
Suitable clean drain pan or container to hold approxi-
mately 3.6 gal. (13.5 L) of coolant drained from unit.
A quantity of new coolant sufficient to refill the com-
pressor.
A minimum of one replacement coolant filter. One sep-
arator element.
PROCEDURE
1. Operate the unit to bring the complete system up to
operating temperature.
2. Shut compressor down by depressing the Start/Stop
push button to the OFF position.
Before beginning any work on the compressor,
open, lock and tag the main electrical disconnect
and close the isolation valve on the compressor
discharge. Wait 2 minutes after stopping to allow
internal pressure to dissipate. Vent residual pres-
sure from the unit by slowly unscrewing the
coolant fill plug one turn. Unscrewing the fill plug
opens a vent hole, drilled in the plug, allowing the
pressure to release to atmosphere (See Figure 4.3-
1). A slight mist or oil droplets may be visible dur-
ing venting. Do not remove fill plug until all pres-
sure has vented from the unit. Also vent piping by
slightly opening the drip leg valve . When opening
the drain valve or removing the coolant fill plug,
stand clear of the valve discharge, wear work
gloves and appropriate eye protection.
3. Place drain pan under coolant drain plug.
4. Remove drain plug and allow coolant to drain from
the tube separator.
5. Remove coolant filter.
6. Allow to drain thoroughly.
7. Drain all hoses and low points within the system.
8. Install a new coolant filter (See Section 4.10).
9. Install a new separator element (See Section 4.14).
10. Install and tighten coolant drain plug.
11. Remove coolant fill plug (See Figure 4.10-1).
12. Using a funnel, refill unit with the new coolant to be
used. Exercise care to prevent entry of any contami-
nants.
13. Replace fill plug.
14. Start unit and check for leaks.
15. Install proper decals for the fluid now installed in
the compressor.
HOT COOLANT
USE CARE
CAN CAUSE
WHEN
SEVERE INJURY DRAINING
! WARNING
Summary of Contents for EP 20-ESP
Page 35: ...33 6 0 REFERENCE DRAWINGS 6 1 ELECTRICAL SCHEMATIC FULL VOLTAGE 39884143 REV 01...
Page 36: ...34 6 2 ELECTRICAL SCHEMATIC STAR DELTA 39884150 REV 01...
Page 38: ...36 6 4 FOUNDATION PLAN TANK MOUNTED CONTINUED 39871975 REV 03...
Page 39: ...37 6 4 FOUNDATION PLAN TANK MOUNTED 39871975 REV 03...
Page 40: ...38 6 5 FOUNDATION PLAN BASE MOUNTED CONTINUED 39872835 REV 03...
Page 41: ...39 6 5 FOUNDATION PLAN BASE MOUNTED 39872835 REV 03...
Page 44: ...42 39876461 REV 02...
Page 46: ...44 39880844 REV 01...
Page 48: ...46 39872031 REV 01 SEE PIPING ASSEMBLY OPTIONS...
Page 52: ...50 39872023 REV 02 TO AFTERCOOLER TO AFTERCOOLER...
Page 57: ...55 DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY 8 0 MAINTENANCE RECORD...
Page 58: ...56 DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY MAINTENANCE RECORD...
