TM 5-3895-374-24-1
GP470FA
1.
Press the [SET UP] key until the controller display reads SET CONTRL.
2.
Press the [FUNCTION] key once. The lower display will read SP SRC and the upper display will read 1LOC.
3.
Press the
] key to change the upper display to 2LOC.
4.
Press [DISPLAY] once to exit the setup mode.
5.
Press [DISPLAY] until the lower display reads SP then use the
] or
] key to change the upper display to
0.20.
6.
Press [DISPLAY] again until the lower display reads 2SP and use the
] or
] key to change the upper
display to 0.50.
To use the 0.50" setpoint for system warmup proceed as follows:
1.
Start the exhaust fan and other equipment required for plant operation. Verify that the HOLD, OPEN and CLOSE
indicators are off.
2.
Press the [FUNCTION] key to illuminate the "R" indicator. The controller will utilize its second setpoint value and
control dryer draft at 0.50".
Press [FUNCTION] again to extinguish the "R" indicator and return to the normal operating setpoint of 0.20".
If the 4-20mA signal from the transmitter falls or is out of range due to over pressure, under pressure, open circuit or short
circuit: the lower display will flash IN1RNG. The controller may be configured to respond to an input failure in either of the
following modes:
If input 1 burnout is configured as DOWN, the controller will energize relay 2 in order to open the exhaust damper.
If input 1 burnout is configured as NONE the controller will de-energize both output relays and the exhaust damper will
maintain its last position.
The DPS is configured at the factory for DOWN scale burnout. Use the following procedure to change the burnout mode if
required.
1.
Press [SET UP] until the display reads SETUP INPUT1.
2.
Press the [FUNCTION] key until the lower display reads BRNOUT. The upper display will show the current
burnout mode.
3.
Use the
]key to change the burnout mode to either NONE or DOWN. Note that UP scale burnout will cause
the exhaust damper to close if an input failure occurs and is not recommended for aggregate drying applications.
4.
Press [DISPLAY] to exit the setup mode and return to normal operation.
(page 3-41)
