Oilless Tankmount Duplex
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product
described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in
personal injury and/or property damage! Retain instructions for future reference.
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
1-888-769-7979 • www.powerexinc.com
IN256903AV 1/12
Description
The OTD Series Powerex Duplex Air Compressors have
been designed and tested to meet the most demanding
specifications for reliability in the pneumatic oil-free industry.
All Powerex air compressors have reliable operation and
feature high quality construction and components. An
unloading feature is included on all compressors to provide
loadless starting. Powerex oilless pumps use composite piston
technology, low compressor speeds and PTFE compression
ring(s) at low maintenance costs.
All 2 through 15 HP models are also equipped with an
auxiliary cooling fan and air control shroud to achieve low
head temperatures, further minimizing ring wear.
Powerex compressor motors are NEMA Class B or better
design. Single-phase motors have built-in overload protection
and a DPST disconnect switch. Three-phase motors require
a manual or magnetic starter and three overload heater
coils which may be ordered as a factory mounted-and-wired
option.
Features
• Oilless reciprocating compressor pump
• High efficiency ODP motors
• Three year warranty on compressor pump
• Optional Isolation pads
• Optional R134 dryer
• ASME tank
• UL listed controls (with optional panel)
NOR
GREN
N
OUTLET
INLET
IN
OUT
1/2 X
1/4
2"
X
1
1/
2"
RESET
RESET
0 0 0 0
0 0 0
PUMP
NO. 2
ALT.
PUMP
NO. 1
0
0
0
0
0
80
PRESSURE GAGE
40
20
60
PSI
100
0
ON
min.
TEST
OFF
45
sec.
0.5
2
4
10
5
0.5
20
8
6
30
40
PSI
160
200
60
0
20
100
180
PRESSURE GAGE
80
140
120
40
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Powerex office. Powerex shall not be liable for damages resulting from misapplication or misuse of its products.
Specifications
Product
OTD Series Powerex Duplex Air Compressors
Performance
Specifications
See Page 2
Lubrication
Grease Filled Bearings
Operating
Voltages
1Ø 1
HP - 1-1/2 HP 115 - 280 / 230 Volts, 60 Hz
2 HP - 5 HP 280 / 230 Volts, 60 Hz
3Ø
280 - 230 / 460 Volts, 60 Hz
Compression
Cycle
Single-Stage (1 HP - 3 HP Models)
Two-Stage (5 HP - 15 HP Models)
Motor
Overload
Protection
1Ø
Built-in Thermal Overload (Standard)
3Ø
IEC Magnetic Starter with Adjustable
Overload (Optional)
Pressure
Settings
Lead Cut-In: Factory Set at Approx. 90 psig (621 kPa)
Cut-Out: Factory Set at Approx. 120 psig (827 kPa)
Lag
Cut-In: Factory Set at Approx. 80 psig (552 kPa)
Cut-Out: Factory Set at Approx. 110 psig (758 kPa)
Overpressure
Protection
ASME Safety Valve Factory Set and Sealed
Outlet Air
Connections
1/2 inch NPT (30, 60, and 80 Gallon Tanks)
1 inch NPT (120, 200 and 240 Gallon Tanks)
Tank Sizes
See Page 2
California
Ordinance
462 (L) (2)
Meets Requirements of this Ordinance
Tank Isolation Standard All Units
Drive
V Belt
Control Panel Optional Panel UL508A Listed
