Exodraft MEC24, Инструкция по установке и эксплуатации

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1. Product information
1.1 Function
UUse The exodraft MEC24 is a Mechanical Exhaust Control used to monitor and maintain a constant pres-
sure in a duct system. This is achieved by modulating the speed of a fan or ventilator. The MEC24 can
be used with the exodraft models EFH, RSV and the EXHAUSTO models BESB and BESF. It can control
the fan speed directly or via a Variable Frequency Drive (VFD). The MEC24 is typically used to control
the pressure in duct systems serving clothes dryers, bathrooms, kitchen hoods and other building
venting applications.
Function The control monitors the pressure in a duct system via connection to a pressure sensor (XTP) , and
maintains the pressure by modulating the fan speed.
The control has an integrated safety system that assures the appliance shuts down in the event of fan
and/or control failure.
The use of the MEC24 is not restricted to any type of duct or venting application. When the appliance
is activated, the control sends maximum voltage to the fan or VFD. Once the specified pressure is
achieved, the control regulates the voltage to the fan or VFD to manintain the specified pressure (the
value can be viewed on the display).
If desired, the control can be interlocked with an appliance. When the appliance is activated, the
control sends maximum voltage to the fan or VFD. Once the specified pressure is achieved, the con-
trol releases the appliance for operation and continues to regulate the voltage to the fan or VFD to
maintain the specified pressure (the value can be viewed in the display). In the event of insufficient
pressure, the control assures the appliance(s) shuts down after 15 seconds. When the appliance shuts
down, the control turns off the fan.
The control can be used in one of two ways:
• Interlocked with the appliance to pre-purge the duct prior to appliance start-up and post-purge the
duct for 3 minutes after appliance shut down.
• Set to run the fan continuously.
In most cases, local codes will require continuous fan operation.
Other functions The control has an integrated safety function. It can be operated with a manual reset function (reset
button) or an automatic reset function. All terminal connections are monitored by LED’s for easy ser-
vice and troubleshooting.
1.2 Shipping
The MEC24 standard packing list
y
MEC24 control unit
y
Pressure transducer (XTP)
y
Silicone tubing
y
Stack probe
If other components are shipped, these will appear as separate items on the shipment packing list.
1.3 Warranty
Complete warranty conditions are available from ENERVEX, Inc.
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3120066 MEC24 US 20210325