Trane IntelliPak 2 Series, Инструкция по установке, эксплуатации и обслуживанию

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12 RT-SVX24Q-EN
information which is used to maintain the space
pressure to within the setpoint control band. Refer to
“Figure 3,” p. 12 for the Humidity vs. Current input
values.
Figure 3. Humidity vs. current
Multi Purpose Module
(MPM - Optional 1U105 - Used with Return Fan Control,
Energy Recovery, and Evaporative Condensers)
The MPM supports three optional features. The first of
which is return plenum pressure control by receiving
analog voltage information for measuring return
plenum pressure, calibrating that reading, and
providing an output to control the return fan speed (if
variable speed configured) in response to control
algorithm requests.
This module also provides inputs and outputs for
control of all Energy Recovery feature devices
including the energy wheel, exhaust and outdoor air
bypass dampers, and recovery preheat.
The liquid line pressure sensor inputs for both
refrigeration circuits are received through the MPM in
support of head pressure control on water-cooled
condenser units.
Variable Speed Module
(VSM - Optional - Used with Fault Detection and
Diagnostics FDD)
The VSM is also used with FDD. The VSM will accept a
0-10 VDC actuator feedback position signal which will
then be used to determine the state of Outside Air
Damper system.
Modulating Hot Gas Reheat Module
(MDM - Optional - Used with Hot Gas Reheat Control)
The MDM supports specific control inputs and outputs
for Modulating Hot Gas Reheat control including
modulating Reheat and Cooling valve control as well as
the Reheat Pumpout Coil Relay output. The Modulating
Hot Gas Reheat control algorithm provides control
requests to the MDM to accomplish proper control.
Ventilation Control Module
(VCM)
The Ventilation Control Module is located in the filter
section of the unit and is linked to the unit’s UCM
network. Using a “velocity pressure” sensing ring
located in the outside air section allows the VCM to
monitor and control the quantity of outside air entering
the unit to a minimum airflow setpoint.
An optional temperature sensor can be connected to
the VCM which enables it to control a field installed
outside air preheater. An optional CO
2
sensor can be
connected to the VCM to control CO
2
reset.
The reset function adjusts the minimum CFM upward
as the CO
2
concentrations increase. The maximum
effective (reset) setpoint value for outside air entering
the unit is limited to the systems operating CFM. The
following table lists the velocity pressure vs. Input
Voltage (see also
Figure 7, p. 16 ).
Table 5. Minimum outside air setpoint w/VCM and
Traq™ sensing
Unit
Input Volts
CFM
90-162 Tons 0.5 - 4.5 VDC 0 - 46000
The velocity pressure transducer/solenoid assembly is
illustrated below. Refer to the
“Units with Traq™
Sensor,” p. 97 for VCM operation.
Figure 4. Velocity pressure transducer/solenoid
assembly
Ventilation
Control
Module
Transducers
Tee
Assembly is located
inside the filter
component
Tee
Tube from high
side of velocity
flow ring
Tube from low side of
velocity flow ring
Tube from Tee to low
side of transducer
Tube from solenoid to
high side of transducer
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