| Bil | Model | Column Name | | 1 | WZPY (Legacy) | HIGH EFFICENCY WATER COOLED SCREW CHILLERS, R134a (54-530RT) | | 2 | WZPY (321, 371, 421, 476 and 531) | HIGH EFFICENCY WATER COOLED SCREW CHILLERS, R134a (54-HIGH EFFICENCY WATER COOLED SCREW CHILLERS, R134a (54-531RT) | | 3 | WZY | WATER COOLED SCREW TYPE, R134a (100-520RT) | | 4 | WVY | VSD WATER COOLED SCREW CHILLERS, R134a (155-520RT) | | 5 | RCU/RCUG-WHYZ(-E) | TWIN SCREW COMPRESSOR TYPE, R407c & R22 (37-500RT) | | 6 | RCU-WFYZ-XB | FLOODED TYPE WATER COOLED CHILLER, R134a (143-458RT) | | 7 | RCUA-WHYZ-HE-E | HITACHI ROTARY SCREW CHILLERS, R410a (160-840RT) |
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