Page 9 - F09-BPS-YZ101A-Installation-Manual

Pressurization Unit Operation

1. Ensure Protected Enclosure Power is OFF, Enclosure 6. Class I Only - Allow unit to purge protected enclosure for
Pressure Control Regulator is closed, Protective Gas the required time marked on Unit Start Up Instructions.
Supply is ON and alarm system is activated (if utilized). (5 minutes minimum) See “Unit Set Up” on page 8.
2. If utilized, test Purge Vent for proper operation. See “Unit 7. Confirm protected enclosure “Safe” pressure is stable.
Set Up” on page 8. Energize protected enclosure equipment.
3. Class II Only - Remove all Dust from protected enclosure. 8. Loss of “safe” pressure requires immediate attention.
4. Close and Seal Protected Enclosure. Protected enclosure power should be deenergized if
“Safe” pressure cannot be restored within a reasonable
5. Slowly turn Enclosure Pressure Control Regulator amount of time.
CW until a “Safe” 0.25” w.c. reading is shown on the
Enclosure Pressure Gauge.

Enclosure Pressure
Gauge

Enclosure Pressure
Control Regulator

Unit Start Up
Instructions

Optional EXP
Pressure Switch

Model YZ101A-CI/CII-L-U
Less Pressure Switch
Front View

Model YZ101A-CI/CII-W or B-V
With Pressure Switch Front View

© 2018 - Best Purging Systems Corporation BPS YZ101A IOM-R1.0 Page 9 of 14