Section 6 − Operation; Controls - Miller SRH-444 Manuel D'utilisation

5-10. Connecting 3-Phase Input Power (Continued)
! Installation must meet all National
and Local Codes − have only qualified
persons make this installation.
! Disconnect and lockout/tagout input
power before connecting input con-
ductors from unit. Follow established
procedures regarding the installation
and removal of lockout/tagout
devices.
! Make input power connections to the
welding power source first.
! Always connect green or green/yel-
low conductor to supply grounding
terminal first, and never to a line ter-
minal.
See rating label on unit and check input volt-
age available at site.
1 Input Power Conductors (Customer
Supplied Cord)
Select size and length of conductors using

6-1. Controls

5
4
1 Power Switch
2 Amperage Adjustment Control
Use control to adjust amperage within range
for Negative Weld Output terminal (see Sec-
tion 5-6). Use A (inner) scale for low amper-
age range and B (outer) scale for high am-
Section 5-8. Conductors must comply with
national, state, and local electrical codes. If
applicable, use lugs of proper amperage
capacity and correct hole size.
Welding Power Source Input Power Con-
nections
2 Strain Relief (Customer Supplied)
Install strain relief of proper size for unit and
input conductor. Route conductors (cord)
through strain relief. Tighten strain relief.
3 Welding Power Source Grounding
Terminal
4 Green Or Green/Yellow Grounding
Conductor
5 Welding Power Source Line Terminals
6 Input Conductors L1, L2 And L3
Connect input conductors L1, L2 and L3 to
welding power source line terminals.
Close and secure access door on welding
power source.
SECTION 6 − OPERATION
3
perage range.
.
This amperage adjustment scale ap-
plies to the SMAW process only. If using
this machine for the GTAW process, the
scale does not apply. The actual output
current while using the GTAW process
is higher than the scale setting.
Disconnect Device Input Power Connec-
tions
7 Disconnect Device (switch shown in
OFF position)
8 Disconnect Device (Supply) Grounding
Terminal
9 Disconnect Device Line Terminals
Connect green or green/yellow grounding
conductor to disconnect device grounding
terminal first.
Connect input conductors L1, L2, And L3 to
disconnect device line terminals.
10 Over-Current Protection
Select type and size of over-current protec-
tion using Section 5-8 (fused disconnect
switch shown).
Close and secure door on line disconnect de-
vice. Follow established lockout/tagout pro-
cedures to put unit in service.
2
3 Remote Amperage Control Recep-
tacle (See Section 5-7)
4 Supplementary Protector CB1 (See
Section 7-2)
5 Remote Amperage Switch (See Sec-
tion 6-2)
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