Application: Stair Pressurisation Fan With External Pid - Zener MSC-3 Instruction Manual

Quick Setup for Config 3.

Application: Stair pressurisation fan with external PID

This setup is for a typical HVAC stair pressurisation fan application that requires air pressure control
using an air pressure transducer and a PID controller external to the MSC-3. The MSC-3 is configured
to run in essential services override (ESO) mode. Prior to commissioning, you will need to know the type
of speed signal that is to be used (0-10V, 4-20mA etc) between the output of the external PID controller
and the MSC-3.
Procedure
STEP 1 Complete the power wiring according to the instructions on pages 9 to 18
STEP 2 Connect the control wiring as shown.
CAUTION
Do not connect the wire
to terminal 6 yet.
The terminal configuration
should not be changed
while the MSC-3 is
enabled.
i
Essential Services
Override (ESO)
See page 51 for
detailed information
STEP 3
Connect the signal wiring from the external PID controller as shown. Consult the PID
controller manufacturer's literature for other connections and power supples required by
the PID controller.
STEP 4 Follow the instructions on page 47 for MSC-3 startup, setting the parameters
according to the table below. Alternate values may be used to suit the application.
Menu Menu Item
G00 INPUT/OUTPUT G01 Inpt fxn CFG
(Input terminal
configuration)
G00 INPUT/OUTPUT G03 RL1
G04 Rl2
B00 MOTOR B01 MOTOR VOLTS
B02 MOTOR AMPS
B03 MOTOR HZ
B04 MOTOR RPM
D00 PROTECTION D01 CURRENT LIM
D02 I2t Thermal overload
E00 STOP/START E03 AUTO RESTART
E04 Reset by PF
F00 REFERENCES F03 ESO REF
C00 PERFORMANCE C03 RAMP
Step 5
Now connect the wire to terminal 6.
End of procedure
40
MSC - 3 Control Board
+5V D1 D2 D3
1 2 3 4
Power up start
Suggested Setting
I02 ~STOP = D1(2)
I00 FWD & LATCH = D2(3)
I08 ESO = D3(4)
I11 REMOTE = D4(5)
G030 RL1 Signal = RUN (default)
G040 RL2 Signal = TRIP (default)
Motor nameplate voltage
Motor nameplate amps
Motor nameplate frequency
Motor nameplate RPM
Motor nameplate current +10%
Motor nameplate current
E030 ARs ALLOWED = 5
ENABLED
AI(10,11)
C030 ACCEL TIME = 10 sec
C031 DECEL TIME = 10 sec
C034 ESO RAMP = 10 sec
IM00120 IM00120
DIG
D4 EN COM SCN Vref IN+ IN -
5 6 7 8 9 10
+
External PID controller output
11
-
Page for detailed
information
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