OWNER’S MANUAL
© 2010 MILLER Electric Mfg. Co.
OM-823 029 899V
2010−05
RHC-3, RHC-3GD34A, And
RHC-14 Remote Hand Controls
DANGER! − Indicates a hazardous situation which, if not
avoided, will result in death or serious injury. The possible
hazards are shown in the adjoining symbols or explained
in the text.
Wear safety glasses with side shields.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury. The possible ha-
zards are shown in the adjoining symbols or explained in
the text.
Arc rays can burn eyes and skin − wear a welding helmet
with correct filter, and cover exposed skin with nonflam-
mable clothing.
NOTICE
Indicates statements not related to personal injury.
Indicates special instructions.
Welding sparks can cause fire or explosion. Move flam-
mables away. Do not weld on closed tanks or barrels −
they can explode. Clean tanks or barrels properly.
Beware of electric shock from welding electrode or wiring.
Touching the electrode while in contact with the work or
ground can cause electric shock. Always wear dry
gloves. Keep all panels and covers closed.
Breathing welding fumes and gases can harm your
health. Welding requires good ventilation. If ventilation is
impossible, such as when welding in a confined space,
use an air-supplied respirator.
CALIFORNIA PROPOSITION 65 WARNINGS
Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to cause birth defects and, in
some cases, cancer. (California Health & Safety Code Section 25249.5 et seq.)
This product contains chemicals, including lead, known to the state of California to cause cancer, birth defects, or other reproductive harm.
Wash hands after use.
1. Specifications And Connections
141 127-A
1 Twistlock Plug
2 5- Or 14-Pin Amphenol Plug
Units are equipped with a 20 ft
(6 m) cord. If a longer cord is required, see
Section 2.
A 7-1/2 in.
(191 mm)
B 9-1/2 in.
(241 mm)
C 8-3/4 in.
(222 mm)
B
C
A
1
2
OM-823 Page 2
2. Selecting Interconnecting Cord
Conductor Size (*AWG)
Cord Length Amperage Or Voltage Control RHC-14
Up to 20 ft (6 m) No. 16
Up to 20 ft (6 m) (GD Models) No. 14
21 to 100 ft (6 to 30 m) (GD Models) No. 12 No. 18 For Any Length
21 to 50 ft (6 to 15 m) No. 14
51 to 100 ft (16 to 31 m) No. 12
101 to 200 ft (31 to 61 m) No. 10
*AWG − American Wire Gauge
OM-823 Page 3
3. Adjusting Amperage Or Voltage
. On some welding power
sources, the front panel output
control setting does not matter
and the Remote Hand Control
adjusts the full range of the
welding power source output.
Ref. 122 023-A / Ref. 141 127-A / 039 411-D / Ref. 159 059 / Ref. 130 214-A
Example Of Remote Amperage Control Without Output (Contactor) Control
Set Switch Set Control Adjust Remote Amperage
Example Of Remote Amperage Control With Output (Contactor) Control
Min
(40 A)
Max
(200 A)
In Example: Min = 40 A In Range B,
Output = 120 A (50% of 40 to 200)
Max = 200 A In Range B
Set Switches Set Control
Min
(5 A)
Max
(200 A)
Place switch in On position for open-circuit
voltage. When switch is in Off position no
output is present.
In Example: Min = 5 A
Output = 200 A (100% of 5 to 200)
Max = 200 A
OM-823 Page 4
4. Routine Maintenance
! Turn Off all power before maintaining.
3 Months
Everyday
Replace
Cracked
Parts
Replace
Unreadable
Labels
Cord(s)
Move Control From
Min. To Max.
5. Troubleshooting
Trouble Remedy
No amperage or voltage control. Set switches and controls on welding power source or generator (see Section 3*).
Check weld output on welding power source or generator.
Secure cord connections or replace cords, if necessary.
No output (contactor) control. Remote Hand Control switch in wrong position or control not so equipped.
Check switch settings and weld output on welding power source or generator.
Secure cord connections or replace cords, if necessary.
*See welding power source or generator Owner’s Manual.
6. Circuit Diagrams
150 670-C
RHC-3
094 231-B
RHC-3-GD34A
053 656-A
RHC-14RHC-3 (100 ft)
210 458-B
OM-823 Page 5
7. Parts List
3
Description
Part
No.
Dia.
Mkgs.
Item
No.
Figure 7-1. Complete Assembly
Model
RHC-
14
RHC-
Quantity
RHC-3
GD34A
RHC-3
(100ft)
(100ft)
RHC-1
4
1 R1 222 736 Rheostat, WW 150W 15 Ohm 1 1... .... ..... .. ......... ..................
1 R1 035 897 Potentiometer, C Sltd Sft 1/T 2W 1K 1 1... .... ..... .. ......... ..................
1 R1 605 960 Rheostat, WW 300W 34 Ohm 1... .... ..... .. .......................
2 085 220 Label, Caution Electric Circuit 1 1 1 1 1... ............. .. ......... .... .... .... .....
3 +021 475 Wrapper 1 1 1... ............ .. ........................... ........... ....
3 +014 417 Wrapper 1 1... ............ .. .................................. ..................
4 217 193 Case Section, Base/Front/Rear 1 1... ............. .. ....... ...........
4 109 974 Case Section, Base/Front/Rear 1 1... ............. .. .............. ..................
4 234 522 Case Section, Base/Front/Rear 1... ............. .. ............................
5 PLG1 605 797 Plug, Twlk 3P3W 20A 125V 1 1... ... ... .. ........... ..................
5 PLG1 144 310 Housing Plug & Pins, (Consisting Of) 1 1... ... ... .. ......... ..................
134 732 Terminal, Male 1 Pin 24-20 Wire 14 14................... .... ............ .................
143 922 Clamp, Cable Strain Relief Sz 17 & 20 1 1................... .... ....... ..................
5 PLG1 032 898 Plug, Twlk Grd 2P3W 15A 125V 1... ... ... .. .....................
6 217 029 Bushing, Strain Relief 1 1 1... ............. .. ................ ........... ....
217 030 Nut, Locking Strain Relief 1/2 In Npt .270 1 1 1................... .. ........... ....
7 204 213 Cable, Pwr 16Ga 3/C (Order By Ft) 1... ............. .. ....
7 175 284 Cable, Pwr 20Ga 5/C (Order By Ft) 20Ft 100Ft... ............. .. ........... ..............
7 600 349 Cable, Port No.14 3/C (Order By Ft) 20Ft... ............. .. ................
7 600 795 Cable, Port No.12 3/C (Order By Ft) 100Ft... ............. .. ......................
8 186 019 Label, Model/Stock Number 1... ............. .. ..........
8 210 459 Label, Model/Stock Number 1... ............. .. ...............................
9 097 926 Knob, Pointer 1 1... ............. .. ....................... ..................
9 193 919 Knob, Pointer 1 1... ............. .. .............................. ..................
9 148 723 Knob, Pointer 1... ............. .. .....................................
10 148 719 Nameplate 1 1... ............. .. ......................... ..................
10 130 214 Nameplate 1 1... ............. .. ................................ ..................
10 148 717 Nameplate, Rhc-3Gd 34A 1... ............. .. ..........................
S1 011 609 Switch, Tgl SPDT 15A 125VAC 1 1.......... ...... .. .............. ..................
1
2
3
4
5
9
10
6
7
8
141 128-A
Figure 7-1. Complete Assembly (RHC-3 Illustrated)
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
BE SURE TO PROVIDE MODEL AND STYLE NUMBER WHEN ORDERING REPLACEMENT PARTS.
/