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BACNET™ MOTORIZED VAV DIFFUSER
TWO YEAR WARRANTY
Acutherm warrants that its Model EF-B diffuser, exclusive of any options and accessories (whether factory or field installed) shall
be free from defective material or workmanship for a period of two (2) years from the date of shipment and agrees to repair or
replace, at its option, any parts that fail during said two (2) year period due to any such defects which would not have occurred
had reasonable care and proper usage and all parts and controls remain unaltered. Acutherm makes NO WARRANTY OF
MERCHANTABILITY OF PRODUCTS OR OF THEIR FITNESS FOR ANY PURPOSE OR ANY OTHER EXPRESS OR
IMPLIED WARRANTY WHICH EXTENDS BEYOND THE LIMITED WARRANTY ABOVE. ACUTHERM'S LIABILITY FOR
ANY AND ALL LOSSES AND DAMAGES RESULTING FROM DEFECTS SHALL IN NO EVENT EXCEED THE COST OF
REPAIR OR REPLACEMENT OF PARTS FOUND DEFECTIVE UPON EXAMINATION BY ACUTHERM. IN NO EVENT
SHALL ACUTHERM BE LIABLE FOR INCIDENTAL, INDIRECT OR CONSEQUENTIONAL DAMAGES OR DAMAGES FOR
INJURY TO PERSONS OR PROPERTY. Acutherm shall not be responsible for freight to or from its plant in connection with the
inspection, repair or replacement of parts under the terms of this limited warranty nor for cost of removal or installation.
Network Wiring Notes from ASHRAE 135
The BACnet MS/TP protocol uses EIA-485 (RS485) as its physical layer. EAI-485 is a three conductor network. All network wiring
should be to the ASHRAE Standard 135 (summarized below) with the twisted pair used for '+' and '-', maintain polarity, and use
the drain wire as the third conductor for the 'COM'.
ASHRAE Standard 135 9.2.1 Media for network wiring:
•
Topology: daisy chain, bus
•
Wire: shielded twisted pair (with drain), 18 AWG 0.82mm
•
Impedance: 100-130Ω
•
Capacitance, distributed: between conductors <100pF/m (30pF/ft) and between conductors and shield <200pF/m (60pF/ft)
•
Max length: 1200m (4000ft) per segment
•
Use terminating 120Ω ¼W 5% resistors at each end
EF-B-M BACnet MOTORIZED VAV DIFFUSER
INSTALLATION OPERATION AND MAINTENANCE
FIG. 2 WIRING DIAGRAM
Factory Wiring
Fuse
Fuse
500mA
500mA
24VAC
(POWER IN)
8
BACNET™ MOTORIZED VAV DIFFUSER - Manual | acutherm.com
Fuse
24VAC Supply
24VAC Supply
500mA
Power
EF-B-M BACnet MOTORIZED VAV DIFFUSER
INSTALLATION OPERATION AND MAINTENANCE
ON
1A 2A 1B 2B - SW +
ROOM GRD D UCT
ON
Factory Wiring
Factory Wiring
1A 2A 1B 2B - SW +
Factory Wiring
Factory Wiring
OFF
24VAC
(+)
(-) COM
AIP
COM
AOP
1W
COM
+5v
AIP
(+)
COM
(-)
AOP
COM
1W
COM
+5v
(+)
(-)
COM
ETHERNET
(POWER IN)
(BACnet)
(0-10V)
(0-10V)
(1-WIRE)
(0-10V)
(SENSOR NET)
(0-10V)
(1-WIRE)
(SENSOR NET)
BACnet Network
BACnet Network
Power
Power
Connection
Connection
+ -
+ -
Power
LED
LED
COM
Fig. 7 Wiring Diagram
Fig. 7 Wiring Diagram
conductor area
2
FORM 091.205 REV 1403
FORM 091.205 REV 1403
(Supersedes nothing)
(Supersedes nothing)
FORM 091.205 REV 1403
ON
(Supersedes nothing)
1A 2A 1B 2B - SW +
+ PWM -
+ PWM -
ROOM GRD D UCT
Factory Wiring
Fuse
LED to confirm
LED to confirm
500mA
button press
button press
Button to re-send
Button to re-send
I AM message
I AM message
24VAC
+ PWM -
ROOM GRD D UCT
Dip Switches 1-64
Dip Switches 1-64
(POWER IN)
set MAC address
set MAC address
LED to confirm
24VAC Supply
ON
OFF
ON
1
1
button press
Power
2
2
4
4
8
8
Button to re-send
16
16
32
I AM message
32
64
64
Dip Switch AUTOM
Dip Switch AUTOM
AUTOM
AUTOM
must be off to allow
must be off to allow
OPTN1
OPTN1
OPTN2
OPTN2
Dip Switches 1-64
OPTN3
MAC address to be
OPTN3
MAC address to be
TERM
TERM
set MAC address
set with dip switches
set with dip switches
OFF
ON
1-64
1-64
1
2
4
8
Dip Switch TERM
Dip Switch TERM
(+)
(-) COM
16
ETHERNET
(BACnet)
32
enables a 120 end
enables a 120 end
64
Dip Switch AUTOM
AUTOM
of line resistor
of line resistor
must be off to allow
OPTN1
OPTN2
OPTN3
MAC address to be
TERM
COM
set with dip switches
1-64
ON
1A 2A 1B 2B - SW +
ROOM GRD D UCT
Factory Wiring
Factory Wiring
OFF
(+)
(-) COM
AIP
COM
AOP
1W
COM
+5v
(+)
(-)
COM
(BACnet)
ETHERNET
(0-10V)
(0-10V)
(1-WIRE)
(SENSOR NET)
BACnet Network
Power
Connection
+ -
LED
COM
Fig. 7 Wiring Diagram
FORM 091.205 REV 1403
(Supersedes nothing)
+ PWM -
LED to confirm
button press
Button to re-send
I AM message
Dip Switches 1-64
set MAC address
ON
1
2
4
8
16
32
64
Dip Switch AUTOM
AUTOM
must be off to allow
OPTN1
OPTN2
OPTN3
MAC address to be
TERM
set with dip switches
1-64
Dip Switch TERM
enables a 120 end
of line resistor
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