Installation, Operation and Maintenance Manual
Marvel Mini
14
Subject to change without notice.
120.9-IM (1218)
IMPORTANT: Please observe polarity of this sensor The “+”
is +24 vdc and the “–“ is the output (4-20 mA)
to the Analog Input of the controller
7
Connect from the positive terminal “+” inside the
pressure transducer to the unit’s electrical terminal
block TB-DMPT +
8
Connect from the negative terminal “–” inside the
pressure transducer to the unit’s electrical terminal
block TB-DMPT –
9
Connect the drain wire to ground at the unit end only
FIGURE 8 – PRESSURE TRANSDUCER
The factory provided static pressure transducer is preset
for application requirements The unit’s controller will read
the preset configuration. If a higher or lower pressure
configuration is required, use the manufacturer’s provided
literature to re-configure the sensor to read the desired
lower or higher pressure setting
NOTE:
When changing the configuration of the pressure
transducer, the range for the sensor must also be changed
within the unit’s controller/sensor setup area Refer to the
Marvel Controller’s Technician’s Menu – Sensor Setup area
for setting up the range of the sensor
Duct Mount Supply Air Temperature Sensor
The duct mount supply air temperature sensor(s) shown
in Figure 9 – Supply Air Sensor must be field installed in
the supply air ducting The location of the sensor must be
relatively close to the duct pressure transducer and must
not impede with airflow to the inlet of the transducer. A few
feet (2/3 feet) from the transducer is recommended
Mounting
1
Cut out the mounting template provided with the
sensor
2
Select the location to mount the sensor and drill a hole
through the supply air duct at least ¾” in diameter
3
Using a 7/64” drill-bit, drill the three fastening screw
holes located on the template for the fastening ring
4
Remove the duct sensor’s mounting ring from the duct
probe being careful not to lose the sealing gasket
5
Position the mounting ring over the ¾” hole drilled in
step 2
6
Use three (3) field provided #6 x ¾” Pan Head sheet
metal screws and fasten bracket to the duct
7
Place the probe through the mounting bracket and into
the supply air duct
8
Using the screw provided with the sensor installation
kit, place the screw into the clamping ring and tighten
the ring to secure the sensor to the clamping ring
