Trimming Refrigerant Charge

The 19XL is shipped with the correct charge for the de sign duty of the machine . Trimming the
charge can be best accomp lished when design load is available. To tr im, check the temperatu re
difference between le aving chilled water te mperature and coole r refri gerant temperatur e at full
load design conditio ns . If necessary, add or rem ov e refrigerant to bring t he temperature
difference to d esign condition s or minimum differential.
Initial Start-up

Preparation

Before starting the machine, check that the:
1. Power is on to the main starter, oil pump relay, tower fan starter, oil heater relay, and the
machine control center.
2. Cooling tower water is at proper level, and at or belo w design entering temp erature.
3. Machine is charged wit h r ef rigerant and all refri gerant and oil valve s are in their proper
operating position.
4. Oil is at the proper leve l in t he reservoir sight glas s e s.

Click here f or Table 9 — Refrigerant ( HCFC-22 or H FC-134a) Char ges