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8. ∆
∆∆
∆Ρ
ΡΡ
Ρ
Gauge & Message
– If unit is supplied with this option, the filter elements can be changed
whenever the differential pressure exceeds the setting on the switch. This switch is factory adjusted
to approximately 10 PSID and should not require adjustment. A light will illuminate along with a
message to alert the operator that the filter elements need changing.
9.
Hourmeter
– The hour meter will be energized any the generator is actually making nitrogen. The
hour meter does not run when the economizer is active. The pressure switch (PS1) controls when the
hourmeter runs.
8.0 Operation & Maintenance
8.1 Heater Controls
A. Initial Setup
With unit pressurized and On/Off Switch in the on position, locate the CAL controller on the
electrical enclosure door. Upon power up a new controller will need to be programmed. Initially
it will display “
inPt : none
”
1. Input Type
Initially “
inPt : none
” is displayed. Press and hold
*
and press"#keys to locate
tC K
and
release the buttons. Press " once and the display will now read “
unit : none
”.
2. Select Units
Press and hold
*
and press"#keys to locate
o
F
and release the buttons. Press " once and
the display will now read “
SP1.d : none
”.
3. Setpoint Device
Press and hold
*
and press"#keys to locate
SP1.d:SSd
and release the buttons.
4. Save to Memory
Press and Hold "#keys simultaneously for 3 seconds to enter initial configuration into
controller memory. The display will now read “
ParK”
because a setpoint has not been
entered yet..
Auto Tune needs to be performed before the final set point is entered.
B. Auto Tune
1. Set Temperature
Press the
*
and " until the temperature set point is about 15 degrees above the upper display
reading to allow autotune to perform properly.
2. Tune
Press the "#keys simultaneously for 3 seconds and “Tune” should appear in the display.
3. Tune at Setpoint
Press * and " until tune:At.SP appears Press "#keys simultaneously for 3 seconds. Unit
will auto tune to proper setting. If auto tune does not give desired results, PID values can be
input manually using the following procedure.
C. Manual Tuning
1. Enter Tuning
Press the "#keys simultaneously for 3 seconds and “Tune” should appear in the display.
2. Proportional Band
Press the " key until
bAnd
appears. Hold the
*
and " keys until a value of
5.8
is reached.
3. Integral
Press the " key until
int.t
appears. Hold the
*
and " keys until a value of
4.5
is reached.
4. Derivative
Press the " key until
dEr.t
appears. Hold the
*
and " keys until a value of
16
is reached.
D. Temperature Setpoint
Press and hold the
*
and "# until the lower display reaches the desired temperature set point.
Release keys and the new setpoint is established.
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