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

Quick Setup for Config 3.

Application: Stair pressurisation fan with internal PID

This setup is for a typical HVAC stair pressurisation fan application that requires air pressure control
using an air pressure transducer and PID controller function provided by the MSC-3 extended
features option. The MSC-3 is configured to run in essential services override (ESO) mode. Prior to
commissioning, you will need to know the type of air pressure transducer signal that is to be used
(0-10V,4-20mA etc).
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 air pressure transducer as shown. Consult the
pressure transducer manufacturer's literature for power supply requirements of the
transducer.
Go to the G00 INPUT/OUTPUT menu and select G10 AI(32,34). Set G100 for the type of
pressure transducer signal (mA or voltage). Set G101 Min Input and G02 Max Input to
reflect the range of the signal, typically 4-20mA or 0-10V. For more information, see page
105
38
MSC - 3 Control Board
+5V D1 D2 D3 D4 EN
1 2 3 4 5 6
Power up start
MSC-3 Extended
Features Option
IN+
32
+
IM00120 IM00120
DIG
COM SCN Vref IN+ IN -
7 8 9 10 11
See page 45
IN-
for additional
34
details
-
Air pressure
transducer