Orion System OE217-00 - Manual (Page 37)

Form: ORION-OE275-01-SuctionPressureTransducer-1E.doc
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Description
The OE275-01 Suction Pressure Trans-
ducer is used to monitor the suction line
pressure of a DX coil when the HVAC unit
is equipped with a digital compressor. The
Suction Pressure transducer is used in
applications requiring tight control of the
suction pressure in order to maintain coil
efficiency during varying coil load condi-
tions. The Suction Pressure Transducer
monitors the suction pressure at the coil
and this information is used to load/unload
or stage compressors to maintain the suc-
tion pressure at the DX coil within a pre-
determined optimum operating range.
The OE275-01 Suction Pressure Trans-
ducer metal wetted parts are made from
stainless steel and Haynes 214 alloy. The
Suction Pressure Transducer is weather
resistant. Connection to the pressure
source is accomplished by screwing the
1/4” SAE female Schrader fitting on the
Suction Pressure Transducer onto a 1/4”
Schrader male valve fitting (by others) that
is welded into the suction line. The Suction
Line Transducer provides a 0.5 to 4.5 VDC
output in response to a 0 to 250 PSIG
pressure. Transducer accuracy is
± 0.25%
of the full scale of the transducer.
For easy wiring the OE275-01 Suction
Pressure Transducer has a 3 pin Packard
connector that connects to a 6 foot long
prefabricated cable. The cable is supplied
with a 3 pin Packard Metripak 150 mating
connector for attachment to the sensor on
one end and has 3 color coded stripped
wires on the other end for attachment to
the digital compressor’s control board. The
stripped wire ends can be spliced to other
wires to extend the wiring length when re-
quired.
Technical Data OE275-01- Suction
Pressure Transducer
Operating Pressure Range -0 to 250 PSI Gauge Power Input 5 VDC
Operating Temp -40
°F to 185°F Signal Output 0.5 to 4.5 VDC
Wetted Parts Construction Stainless Steel Electrical Cable Connection 3 Pin Packard Connector
Sensor Construction Haynes 214 Alloy Electrical Cable Length 6 Feet
Pressure Fitting Construction Stainless Steel Accuracy ± 0.25% of Full Scale
Hysteresis ± 0.1% of Full Scale Pressure Fitting Size 1/4” SAE Female
Schrader Fitting Non-repeatability ± 0.05% of Full Scale
Weight 2.3 Ounces Response Time ± 0.05% of Full Scale
Three Year Warranty WattMaster reserves the right to change specifications without notice
OE275-01 – Suction Pressure Transducer
(For Units With Digital Compressor)
2.18
0.50
0.63
1.28
1.06
1/4” SAE Female
Schrader Fitting
Common
(Black)
Not Used
(Red)
+ Excitation
- Output
(White) Top View
Front View
Transducer Cable
Assembly - 6 Ft. Length
Suction Pressure
Transducer