Caution, Warning, Pre-start procedure – Bell & Gossett 176R0649C Technologic 502 Series Pump Controller User Manual
Page 28
28
Section 4 Start Up
Pre-start Procedure
1. Input power to unit must be OFF and locked
out per OSHA requirements. Do not rely on
panel disconnect switches.
H
igH
v
oltagE
!
i
f
input
and
output
connEctions
HavE
bEEn
connEctEd
impropErly
,
tHErE
is
potEntial
for
HigH
voltagE
on
tHEsE
tErminals
. i
f
powEr
lEads
for
multiplE
motors
arE
impropErly
run
in
samE
conduit
,
tHErE
is
potEntial
for
lEakagE
currEnt
to
cHargE
capacitors
witHin
option
panEl
,
EvEn
wHEn
disconnEctEd
from
linE
input
. f
or
initial
start
up
,
makE
no
assumptions
about
powEr
componEnts
.
f
ollow
prE
-
start
procEdurEs
dEscribEd
bElow
. f
ailurE
to
follow
prE
-
start
procEdurEs
dEscribEd
bElow
could
rEsult
in
pErsonal
injury
or
damagE
to
EquipmEnt
.
2. Use AC voltmeter to verify there is no
voltage on input terminals L1, L2, and L3,
phase-to-phase and phase-to-ground, and
output terminals T1, T2, and T3, phase-to-
phase and phase-to-ground.
3. Use ohmmeter to confirm continuity of motor
by measuring T1-T2, T2-T3, and T3-T1.
4. Use ohmmeter to confirm open on input by
measuring L1-L2, L2-L3, and L3-L1. Note
that if an isolation transformer is between
the power source and panel, continuity will
be present. In this case, visually confirm that
motor and power leads are not reversed.
5. Inspect the panel for loose connections on
terminals.
6. Check for proper ground: option panel to
main building distribution ground, and to
motor ground.
WARNING
!
7. Confirm control connections terminated
per connection diagrams supplied with the
equipment.
8. Check for external devices between
drive option panel output and motor. It is
recommended that no devices be installed
between motor and drive.
9. Record motor nameplate data; hp, voltage,
full load amps (FLA), and RPM. It will be
needed to match motor and drive data later
on.
10. Confirm that incoming power matches drive
label voltage and motor nameplate voltage.
11. For multiple winding motors, motors must
be wired on run winding Delta, not Y-start
winding.
caution
E
quipmEnt
d
amagE
!
i
f
motor
fla (
full
load
ampEragE
)
is
grEatEr
tHan
unit
maximum
amps
,
controllEr
and
option
panEl
must
bE
rEplacEd
witH
onE
of
appropriatE
rating
. d
o
not
attEmpt
to
run
unit
. f
ailurE
to
matcH
fla
to
unit
maximum
amp
rating
may
rEsult
in
EquipmEnt
damagE
.
12. Confirm motor FLA is equal to or less than
maximum option panel output current. Some
motors have higher then normal NEMA
currents.
13. Check that overload relay(s) is set for FLA of
connected motor. Service factor is built into
overload relay.