8 P—P28 and P128 Series Lube Oil Controls with Built-in Time Delay Relay Product/Technical Bulletin
Ordering Information
Table 4: Ordering Information
Series Part
Number Pressure
Connections* Reset Type Refrigerant Time Delay
Relay Voltage Alarm
Terminal Runlight
Terminal
P28AA Style 13, Style 5,
or Style 15 Manual Non-corrosive
All-range 120/240 VAC No No
P128AA Style 5 Manual Non-corrosive
All-range 120/240 VAC No No
P28AN Style 15 Manual Ammonia 120/240 VAC No No
P28DA Style 13 Manual Non-corrosive
All-range 120/240 VAC Yes Yes
P28DN Style 15 Manual Ammonia 120/240 VAC Yes Yes
P28GA Style 13 Automatic Non-corrosive
All-range 120/240 VAC No No
P28NA Style 13 or Style 5 Manual Non-corrosive
All-range 24 VAC/VDC No No
P28PA Style 5 Manual Non-corrosive
All-range 24 VAC/VDC No No
* Style 5 connections are 1/4 in. / 6.4 mm SAE male flare connectors (no capillary tubing). Style 13 connections are 36 in. / 914 mm
capillary tubing and 1/4 in. / 6.4 mm flare nut. Style 15 connections are 1/4 in. / 6.4 mm female National Pipe Thread connectors.
Specifications
Product P28 and P128 Series Lube Oil Controls with Built-in Time Delay Relay
Power Requirements See Tables 1 and 2.
Pressure Specifications Adjustable Cut-out Pressure Difference: 8 to 70 psi (55 to 483 kPa)*
Maximum Differential: 70 psi (483 kPa)
Maximum Working Pressure: 250 psig (1724 kPa) on the high side
Maximum Overpressure: 325 psi (2240 kPa) oil and low side pressure
*The time delay relay is de-energized 3 to 5 psi (21 to 34 kPa) above the cut-out scale setting.
Pressure Switch Units Enclosed Dust-protected Pennswitch
Ambient Operating Conditions 32 to 104°F / 0 to 40°C
Material Case: 0.062 in. / 1.6 mm Galvanized Steel
Cover: 0.028 in. / 0.7 mm Cold Rolled Steel (plated and painted)
Mounting Flat Surface or with a Universal Mounting Bracket (Part No. 271-51)
Wiring Terminal Large 8-32 x 1/4 in. Binder Head Screws
Agency Listings UL Guide No. SDFY; File SA516**
CSA Class No. 1222 01; File LR948**
*
*Most models. Contact Johnson Controls for a complete listing.
Dimensions (H x W x D) 5.66 x 5.32 x 2.09 in. / 144 x 135 x 53 mm
Shipping Weight 3.0 lb / 1.36 kg
The performance specifications are nominal and conform to acceptable industry standards. For appli cation at conditions beyond these specifications,
consult the local Johnson Controls Refrigeration Application Engineering at (414) 274-5535. Johnson Controls, Inc. shall not be liable for damages
resulting from misapplication or misuse of its products.
Controls Group FAN 125
507 E. Michigan Street Master Catalog
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201