Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
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FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION<br />
Also see “Proflo PF1 Setup Alarm Time and Mode:” on page 4-40.<br />
3. Remote mounted Proflo PF1 and proximity switch. The Proflo will excite the proximity<br />
switch circuit with 3 volt battery power to detect the state of the proximity<br />
switch. <strong>Ariel</strong> has defined a maximum wire distance between the proximity switch<br />
and the remote mounted Proflo:<br />
Maximum DistanceCondition<br />
600 feet (183 m)Using standard Proflo PF1 batteries<br />
10,000 feet (3050 m)Powering Proflo PF1 from other power source<br />
The above distances are conservatively calculated based on the following<br />
assumptions/considerations:<br />
1. Standard 22 gage instrumentation wire at 68°F (20°C) in a continuous run.<br />
2. Not significantly degrading battery life.<br />
No electrical noise injected into wire run.<br />
If the Proflo PF1 is to be panel mounted, <strong>Ariel</strong> recommends removing the batteries<br />
and using the power supply from CCT. See “Proflo PF1 Accessories Available:”<br />
on page 4-47.<br />
4. The Proflo PF1 will record any setup changes to the EEPROM.<br />
5. The white wires on the Proflo PF1 can be used for other applications than reading<br />
divider block cycle times. The Proflo can record history of any dry contact switch.<br />
Example: history of a liquid dump valve, history of a high temperature switch, history<br />
of a valve limit switch.<br />
6. The Proflo PF1 electronics is equipped with reverse polarity protection/correction.<br />
The electronics will automatically correct a reverse polarity output connection on<br />
both the pulse and alarm outputs.<br />
Proflo Normally Open and Normally Closed Definition:<br />
There has been some confusion among PLC programmers and electrical people over the definition<br />
of Normally Open (NO) and Normally Closed (NC) as applied to the Proflo and DNFT.<br />
Most electrical components define NO or NC operation as the default state or on the shelf state.<br />
Example: A NO solenoid valve is open when the coil is not energized. When the coil is energized<br />
the valve will close. A NC solenoid valve is closed when the coil is not energized. When<br />
the coil is energized the valve will open. This logic is not used when defining the DNFT or Proflo<br />
electrical contacts. The DNFT and the Proflo use the same definition of NO and NC switch contacts.<br />
Definitions for Proflo and DNFT contact are switch states after the divider block has cycled.<br />
NO = Normally Open when Running. Switch is open when the divider block is<br />
cycling. This is a non-fail-safe operation because if the unit is running and a wire<br />
falls off, the control system will not alarm/shutdown.<br />
NC = Normally Closed when Running. Switch is closed when the divider block is<br />
cycling. This is the fail-safe operation because if the unit is running and a wire falls<br />
off the control system will alarm/shutdown.<br />
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