3:15
Provide Appropriate
Grounding
DANGER
THE USER IS RESPONSIBLE
TO MEET ALL CODE RE-
QUIREMENTS WITH RE-
SPECT TO GROUNDING ALL
EQUIPMENT. FAILURE TO
OBSERVE THIS PRECAU-
TION COULD RESULT IN SE-
VERE BODILY INJURY OR
LOSS OF LIFE.
1. Run a suitable equipment
grounding conductor or
bonding jumper unbroken from
the chassis ground (G) terminal
on the controller faceplate
(Figure 3-11) to the grounding
electrode conductor (earth
ground).
Note that, with an enclosed
controller, the chassis ground
(G) terminal is connected to the
ground terminal near the top of
the enclosure; therefore,
connect the enclosure ground
to earth ground.
2. Connect a suitable equipment
grounding conductor or
bonding jumper to the motor
frame, the remote operator’s
control station (if used), the
input power transformer (if
used), and the controller
enclosure. Run this conductor
or jumper unbroken to the
grounding electrode conductor
(earth ground).
Make Power Wiring
Connections
CAUTION
Motor Leads U, V, and W must
be connected to terminals 601
(U), 602 (V), and 603 (W),
respectively. Failure to observe
this precaution could result in
damage to, or destruction of,
this equipment.
1. Size and select input and
output power wire according to
all applicable codes so that it is
adequate for the voltages and
currents to which it will be
subjected.
2. Connect motor leads U, V, and
W to terminals 601 (U), 602
(V), and 603 (W), respectively,
on the faceplate of the
controller as shown in Figure
3-12. Note: the motor could
operate erratically if leads are
not connected to the
respectively labeled terminals.
3. Connect blower motor leads, if
supplied, in Delta Connection
(see Figure 3-11a) and to
terminals 281, 282, and 283 on
the faceplate of the controller
as shown in Figure 3-12.
Note
:
Motor blower leads are
located in small round conduit box
on the end of the motor opposite
the motor shaft. Refer to Figure
3-11a for lead identification.
4. Connect thermostat leads as
shown in Figure 3-12.
W2
U1
L1
U2
V1
L2
V2
W1
L3
(Delta)
– LINE –
W2
U1
L1
U2
V1
L2
V2
W1
L3
(Star)
LOWER VOLTS
HIGHER VOLTS
NOT USED
1*
1* L1, L2, and L3 connect to 281, 282, and 283.
NOTE: Verify rotation. With correct rotation, fan blows air from fan end to shaft.
Lead Guide
T1 = U1 = Black
T2 = V1 = Blue
T3 = W1 = Brown
T4 = U2 = Green
T5 = V2 = White
T6 = W2 = Yellow
Figure 3-11a. Blower Motor Connection Diagram.
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