Scholar V Installation & Startup Manual 07/2016 New
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C. GreenWheel
®
ERV. Using best industry standards and practices, measure the fresh
air that is being brought into the classroom. For units with one speed controller (std.),
adjust the speed of the intake and exhaust blowers by inserting a slotted screw
driver into the opening on the controller. The speed controller is located in the control
box. Measure the intake air again and adjust the speed of the blowers. Repeat as
necessary to meet the fresh air requirements.
D. GreenWheel
®
ERV with optional controller for exhaust air and all GreenCube
ERV. First measure the air being introduced into the classroom using best industry
standards and practices. Adjust the speed of the intake air blower until the required
outside air is being brought into the classroom. The speed controller is located in the
control box. Measure the intake air again and adjust the speed of the blower. Repeat
as necessary to meet the fresh air requirement.
Now measure the exhaust air from the classroom. Adjust the speed of the exhaust
air fan until the required air is being exhausted from the classroom. The exhaust air
controller is in the control box. It is usual practice to pressurize the classroom by
exhausting slightly less air than is being brought into the classroom.
1.13 PROGRAMMABLE LOGIC CONTROLLER (PLC)
The control logic of the Scholar V is handled by a Siemens S7-1200 1215C
Programmable Logic Controller (PLC). This device is powered by 24 volts DC and has
14 digital inputs, 10 digital outputs, two analog inputs and two analog outputs. The PLC
has a model SM 1231 expansion module which provides four type K thermocouples for
measuring various temperatures throughout the unit.
Figure 12. PLC and Thermocouple Module
