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2. Specifications

2.1 Dimensions and capacities

exodraft MEC24 Control
Power supply

V

1x120 VAC / 60 Hz

Fuse Size Control/Motor

A

0.4/6.3

Max. Motor Load

kW/hp

0.35/0.5

Operating temperature

°F/°C

-4 to 122/-20 to 50

Range of operation

inWC/Pa 0-0.6/0-150

Tolerance

inWC/Pa 0.01/3+/-10%

Control signal VFD

VDC/mA 0-10/max. 10

Control and Alarm relay

Max 

230 VAC/4A AC1 - 24 VDC/2A DC1

Boiler Inputs

10-48 VDC / 10-132 VAC

VFD Relay

Max

230 VAC/2A AC1 - 24VDC/2A DC1 

Output TRIAC

 VAC

10-120

Dimensions

A in/mm 6.88/175
B in/mm 8.48/215
C in/mm 4.33/110

Weight

lbs/kg

3.0/1.5

IP-Rating

NEMA 4X / IP54

Ashcroft XTP-sensor
Power supply

 VDC

14-36

Amperage

mA

6

Output

 VDC

0-10

Operating temperature

°F/°C

0 to 160/-17 to 70

Tolerance

inWC/Pa 0.01/3+/-10%

Weight

lbs/kg

.9/.4

Chimney Probe
Dimensions

H in/mm 4.25/108
I in/mm

3.50/89

B

A

C

D

F

G

E

H

I

Fig. 1

Symbols

Fig. 1-A  Fuse holder Exhaust Fan

Fig. 1-B  Fuse holder Control

Fig. 1-C  Display 128 x 64 pixels

Fig. 1-D   USB port

Fig. 1-E  Up button

Fig. 1-F  Select / Confirm button

Fig. 1-G  Down button

Fig. 1-H  Reset / Back button 

Fig. 1-I  LEDs (green) showing ON/OFF status

 

1.45

2.90

3.33

1.89

1.32

.37

P OWER

HI

LO

SPAN

ZERO

.56

5

3120066 MEC24 US 20210325

Summary of Contents for MEC24

Page 1: ..._______ USA CAN Product information Chapters 1 2 Mechanical installation Chapter 3 Electrical installation Chapter 4 Start up and configuration Chapter 5 Maintenance and troubleshooting Chapter 6 READ...

Page 2: ...uch as those published by the National Fire Protection Association NFPA and the American Society for Heating Refrig eration and Air Conditioning Engineers ASHRAE and the local code authorities 5 This...

Page 3: ...ervention de maintenance ou de nettoyage de l appareil le mettre hors tension au niveau du panneau de service et verrouiller le panneau de service afin d emp cher toute mise sous tension accidentelle...

Page 4: ...ired 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...

Page 5: ...ions A in mm 6 88 175 B in mm 8 48 215 C in mm 4 33 110 Weight lbs kg 3 0 1 5 IP Rating NEMA 4X IP54 Ashcroft XTP sensor Power supply VDC 14 36 Amperage mA 6 Output VDC 0 10 Operating temperature F C...

Page 6: ...annot be mounted inside an airtight enclosure It uses the boiler room pressure atmos pheric pressure as reference pressure 3 2 Mounting of control The control can be mounted directly on a wall or simi...

Page 7: ...Pressure Probe Fig 4 3 4 Mounting of stack probe The probe Fig 2a on page 5 is inserted into the chimney or vent at the point where the draft should be kept constant This could be at the appliance out...

Page 8: ...rom Appliance Boiler 2 thermostat Optocoupler 10 230 VAC DC 17 Voltage Input from Appliance Boiler2 thermostat Optocoupler 10 230 VAC DC Terminal Use 18 Burner 2 relay contact Normally Open max 230 VA...

Page 9: ...e start signal from the burner to terminals 14 and 15 y To connect the chimney fan If using a 1x120V chimney fan connect it to terminals 4 5 and 6 Refer to the fan s Installation Manual If using a 3 p...

Page 10: ...e boiler start signal to terminals 12 and 13 The start signal to the burner is now activated by terminal 14 Connect Neutral to terminal 15 y To connect the chimney fan If using a 1x120V chimney fan co...

Page 11: ...er to terminals 14 and 15 y To connect the chimney fan If using a 1x120V chimney fan connect it to terminals 4 5 and 6 Refer to the fan s Installation Manual If using a 3 phase fan and VFD connect the...

Page 12: ...drive VFD connect the VFD to terminals 20 and 21 of the MEC24 DO NOT connect the fan directly to the control Wire the ABB ACS355 series variable frequency drive according to fig 10 Fig 10 Wire the En...

Page 13: ...DS to the MEC24 The external PDS is a backup to the integrated PDS and both must be satisfied by sufficient draft to release the appliance y Remove the factory installed jumper over terminals 30 and 3...

Page 14: ...ust will be pulled through the appliance The chimney is always primed and there is no real need for pre and post purge functions The energy consumption in this mode is minimal In intermittent mode the...

Page 15: ...XTP 0 1024 The value between 0 1024 is a fraction of 10V meaning that a value of 423 equals 4 13 V Menu 365 Firmware upgrade The MEC24 can be firmware upgraded using a USB memory stick Insert the USB...

Page 16: ...troduction of excessive dilution air 5 XTP sensor not responding correctly A2 Power Fault Indicates there has been a power fault A3 Exhaust Error Indicates a disconnected signal from the XTP Sensor on...

Page 17: ...HAUST Ti Integral gain 0 30 8 167 Sampling rate SAMPLING RATE Set the sampling rate for the PID Loop 1 10 10 168 Pressure type PRESSURE MODE Positive or negative pressure in the stack Positive or Nega...

Page 18: ...on the USB flash drive YES NO NO 364 Load config file LOAD CONFIG FILE Selecting YES will download the current configuration to the USB flash drive YES NO NO 365 Upgrade firmware UPGRADE FIRM WARE Th...

Page 19: ...19 3120066 MEC24 US 20210325...

Page 20: ...Distributor in USA Canada ENERVEX Inc 1685 Bluegrass Lake Parkway Alpharetta GA 30004 P 770 587 3238 F 770 587 4731 T 800 255 2923 info enervex com www enervex com www exodraft com...

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