Ventilation Control Module - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

General Information
Figure 1. Humidity vs. Voltage

Ventilation Control Module

VCM
The Ventilation Control Module (VCM) 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 fresh air section,
allows the VCM to monitor and control the quantity of fresh 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 fresh air preheater.
An optional CO
the minimum CFM upward as the CO
setpoint value for fresh air entering the unit is limited to the systems operating CFM. The following
table lists the Minimum Outside Air CFM vs. Input Voltage.
Table 3.
The velocity pressure transducer/solenoid assembly is illustrated below. Refer to the "Traq Sensor
Sequence of Operation" section for VCM operation.
16
sensor can be connected to the VCM to control CO
2
Minimum Outside Air Setpoint w/VCM Module and Traq Sensing
Unit (AC/EC) Input Volts
20 & 25, 24 & 29 Ton 0.5-4.5 VDC
30/36 Ton 0.5-4.5 VDC
40/48 Ton 0.5-4.5 VDC
50/59, 55 Ton 0.5-4.5 VDC
60-75, 73-89 Ton 0.5-4.5 VDC
90-130 Ton 0.5-4.5 VDC
concentrations increase. The maximum effective (reset)
2
CFM
0-14000
0-17000
0-22000
0-28000
0-33000
0-46000
reset. The reset function adjust
2
RT-SVX36G-EN