103
Fig 57
– Refrigerant pump assembly
9.3.8 Inspect Refrigerant Float System
For 19DV unit, the condenser has a high side ball type float system, and the economizer has a low side ball type
float system. This applies for both the high side float (first float downstream of condenser) and the low side float
(second float downstream of condenser). The float refrigerant level can be observed through the sight glasses
located on the float chamber. Perform the inspection every five years or if the following symptoms are seen.
• There is a simultaneous drop in cooler pressure and increase in condenser pressure. This will be accompanied
by a loss of EER.
• The liquid line downstream of the float valve feels warm and float valve seems stuck based on a visual inspection
through the end cover sight glass. This indicates condenser gas flowing past the float.
1. Transfer the refrigerant into a pumpout storage tank.
2. Remove the float access cover.
3. Clean the chamber and valve assembly thoroughly. Be sure the valve moves freely. Ensure that all openings
are free of obstructions.
4. Examine the cover gasket and replace if necessary.
See Fig.
58
for float detail. Inspect the float every five years. Clean the chamber and the float valve assembly. Be
sure that the float moves freely and the ball bearings that the float moves on are clean.
Summary of Contents for PIC 5+
Page 26: ...26 VFD not shown Fig 13 Sensors actuators location ...
Page 52: ...52 Fig 24 19DV control box ...
Page 53: ...53 1 Power supply 24V AC 2 LEN 3 CCN 4 Ethernet 5 USB Fig 25 19DV HMI box rear view ...
Page 54: ...54 Fig 26 19DV IOB1 wiring Fig 27 19DV IOB2 wiring ...
Page 57: ...57 ...
Page 113: ...113 APPENDIX A SmartView SCREEN AND MENU STRUCTURE ...
Page 114: ...114 Detailed menu description ...
Page 116: ...116 APPENDIX B MAINTENANCE SUMMARY AND LOGSHEETS Cont 19DV monthly Maintenance Log ...
