I-2 / I-3 Valve Preliminary Settings
August 2019 - 89130 v.3.0 7
Preliminary Settings
Oil Viscosity and Viscosity Control
Use extreme caution when making adjustments near moving belts. When operat-
ing the elevator from the controller, follow all safety precautions.
• Verify that the power unit is in a ventilated room that remains between 50°F and 90°F.
• Adjust the valve when the oil is at its operating temperature of 100°F to 170°F.
• Check the unit performance when the oil temperature is no less than 100°F.
• Changes in oil temperature cause changes in valve behavior.
Relief Pressure Setting
The I-2/I-3 Valve requires a minimum static system pressure of 90 PSI.
1. Ensure that the car is empty.
2. Turn OFF, Lockout, and Tagout the mainline disconnect.
3. Open the manual lowering valve to lower the car onto the buffers. See Figure 1.
4. Close the manual lowering valve.
5. Install a pressure gauge on the quick connector located on the far side of the valve.
6. Turn the relief pressure adjustment screw OUT until
5
/
8
" extends beyond the relief
assembly housing, and then tighten the locknut.
Figure 1 - Relief Pressure Setting
Manual Lowering Valve
5
/
8
"
Relief Pressure
Adjustment
Up Leveling
Adjustment
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