SPYDER® BACNET® PROGRAMMABLE, VAV/UNITARY CONTROLLERS
5
62-0310—01
pneumatic controls) is recommended for the high
pressure line (marked as
+
) connected to the air
flow pickup.
—
The tubing from the air flow pickup to the control-
ler should not exceed three feet (0.914 m). Any
length greater than this will degrade the flow
sensing accuracy.
—
Use caution when removing tubing from a con-
nector. Always pull straight away from the con-
nector or use diagonal cutters to cut the edge of
the tubing attached to the connector. Never
remove by pulling at an angle.
Fig. 7. Air flow pickup connections (PVB6436AS and
PVB6438NS).
Wiring
All wiring must comply with applicable electrical codes and
ordinances, or as specified on installation wiring diagrams.
Controller wiring is terminated to the screw terminal blocks
located on the top and the bottom of the device.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect power supply before beginning wiring or
making wiring connections, to prevent electrical shock
or equipment damage.
NOTES:
—
For multiple controllers operating from a single
transformer, the same side of the transformer
secondary must be connected to the same power
input terminal in each controller. Controller
configurations will not necessarily be limited to
three devices, but the total power draw, including
accessories, cannot exceed 100 VA when
powered by the same transformer (U.S. only).
The earth ground terminal (terminal 3) must be
connected to a verified earth ground for each
controller in the group (see Fig. 9 on page 6).
—
All loads on the controller must be powered by the
same transformer that powers the controller itself.
A controller can use separate transformers for
controller power and output power.
—
Keep the earth ground connection (terminal 3)
wire run as short as possible.
—
Do not connect the universal input COM
terminals, analog output COM terminals or the
digital input/output COM terminals to earth
ground.
The 24 Vac power from an energy limited Class II power
source must be provided to the controller. To conform to Class
II restrictions (U.S. only), the transformer must not be larger
than 100 VA.
Fig. 8 depicts a single controller using one transformer.
IMPORTANT
Power must be off prior to connecting to or removing
connections from the 24 Vac power (24 Vac/24 Vac
COM), earth ground (EGND), and 20 Vdc power (20
Vdc) terminals.
IMPORTANT
Use the heaviest gauge wire available, up to
14 AWG (2.0 sq mm), with a minimum of 18 AWG
(1.0 sq mm), for all power and earth ground wiring.
Screw-type terminal blocks are designed to accept
up to one 14 AWG (2.0 sq mm) conductor or up to
two 18 AWG (1.0 sq mm) conductors. More than two
wires that are 18 AWG (2.0 sq mm) can be con-
nected with a wire nut. Include a pigtail with this wire
group and attach the pigtail to the terminal block.
IMPORTANT
Connect terminal 2, (the 24 Vac common [24 VAC
COM] terminal) to earth ground (see Fig. 8).
NOTE: Unswitched 24 Vac power wiring can be run in the
same conduit as the BACnet MS/TP cable.
Fig. 8. Power wiring details for one controller per
transformer.
More than one controller can be powered by a single
transformer. Fig. 9 shows power wiring details for multiple
controllers.
M23556A
AIR FLOW
PICKUP
Δ
P
1 2 3 4 5 6 7 8
1
0
9
2 3 4 5 6 7 8 0
9
1
1 1 1 1 1 1 1 1 2
1
1 2 3 4 5 6 7 8 0
9
2
2 2
2 2 2 2 2 2 3
3
1 2 3 4 5 6 7 8 0
9
3
3
3
3 3
3 3
3 4
RESTRICTOR
PORT
RESTRICTOR
PORT
CONNECTOR
TUBING
M29684
EARTH
GROUND
(TERMINAL 3)
TRANSFORMER
OUTPUT
DEVICE
POWER
Δ
P
1 2 3 4 5 6 7 8
1
0
9
2 3 4 5 6 7 8 0
9
1
1 1 1 1 1 1 1 1 2
1
1 2 3 4 5 6 7 8 0
9
2
2 2
2 2 2 2 2 2 3
3
1 2 3 4 5 6 7 8 0
9
3
3 3
3 3
3 3
3 4
EARTH
GROUND
1
LINE VOLTAGE
GREATER
THAN 150 VAC
WHEN CONNECTIONG POWER TO THE SPYDER BACnet
CONTROLLER, CONNECT THE COM LEG OF THE VAC SECONDARY
CIRCUIT TO A KNOWN EARTH GROUND.
1
COM
24 VAC
CONNECT POWER TO
TERMINALS 1 AND 2
