Page 7 - BEST-Accessory-Technical-Bulletins

Conversion & Installation Details Model Number Matrix

Step 1: Typical Model Number: PMGK - 101A
Carefully remove the enclosure pressure gauge from the unit Model Series Number
and reverse or swap the positions of the tubing connector Kit Size
and vent fitting on the back of the enclosure gauge. Place 101A - Compatible with Model YZ101A
the sealing gasket on the enclosure pressure gauge and
carefully reinstall it, taking care to not over-torque the screws. 101B - Compatible with Model YZ101B
101C - Compatible with Model YZ101C
102 - Compatible with Model YZ102
103 - Compatible with Model YZ103
104 - Compatible with Model YZ104

Unit, Cutout & Bolt Hole Dimensions

Models YZ101A, YZ101B & YZ101C
(b)

BEFORE AFTER (a) Four (4)

DO NOT MOVE (b) 0.25” Ø
FITTINGS ON Bolt Holes
SIDE OF
GAUGE

Model Unit Plate Cutout (a) Hole Centers (b)
YZ101A 8” x 8” 6” x 6” 7”
YZ101B 9” x 9” 7” x 7” 8”
YZ101C 9” x 9” 7” x 7” 8”

Step 2: Models YZ102, YZ103 & YZ104
Apply the unit mounting plate gasket to the rear surface of (b) (b)
the unit.

(b)
To (a) Eight (8)
Suitable 0.25” Ø
Source of To Female Bolt Holes
Protective Bulkhead (b)
Gas Union
& Vent
Fitting Model Unit Plate Cutout (a) Hole Centers (b)
YZ102 12” x 12” 10” x 10” 5.5”
YZ103 12” x 12” 10” x 10” 5.5”
YZ104 14.5” x 14.5” 12.5” x 12.5” 6.75”
Step 3: IMPORTANT NOTES

Install the unit in the protected enclosure’s cutout and install 1. A properly sized and installed Model RR Redundant Regulator
the bulkhead unions through the protected enclosure’s or Model PV Purge Vent is strongly recommended when this kit
external surface. Using rigid or flexible tubing, connect the is utilized to install Model YZ101A, YZ101B or YZ101C Units.
unit regulator air supply fitting to a suitable protective gas 2. Tubing from the Enclosure Supply Fitting of Model YZ102,
source and connect the low port of the enclosure pressure YZ103 & YZ104 Units should be internally routed to attain the
gauge to the atmospheric pressure reference vent. Supplied maximum degree of cross ventilation from the Enclosure Purge
labels may then be applied to properly identify the bulkheads. Vent in complete accordance with NFPA 496 requirements.

This kit may be factory installed - please contact a sales associate for more information!

Specifications subject to change without notice, warranty & liability statements available upon request.
Best Purging Systems Corporation www.purgeit.com 4725 Lawndale • La Marque, Texas 77568 Phn: 844.PURGE IT