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EnForcer™ SCR
Service Manual
I.B. 1561
29
WARNING:
Be sure to install phase A, phase B, and phase C wires to their proper terminals in the front of the charger (A
is on the left, C is on the right).
When installing primary leads into the terminal blocks, take special precaution in preparing the double-wire
leads (wires #2 and #5) for insertion into the terminal blocks.
6) Connect the transformer’s control voltage wires to the fuses.
WARNING:
Be sure to install 7A, 7B, and 7C in proper order (A is on the left, C is on the right). If they are not connected
properly, a phase control problem will occur.
7) Connect the secondary leads to the SCR/Diode Blocks. Again, be careful to connect phase A to phase A, phase
B to phase B, etc.
SCR / DIODE BLOCK
Specifications for mounting SCR / Diode Blocks on Flat Aluminum Heat Sinks:
Surface
1) No scratches, gouges, or burrs allowed in the SCR / Diode block contact area.
2) No oil, dirt, paint, adhesive or other foreign substances are permitted in the contact area.
3) Apply a light coating of heat sink thermal compound to the flat side of the SCR / Diode Block.
Mounting Instructions
1) Tighten the nut with your fingers as far as possible. Then use the torque wrench. Do not exceed the torques
shown in the following table.
2) Do not use any other wrench to tighten the nut.
SCR / Diode Block Mounting Torque (in/lb)
Buss Bar Mounting Torque (in/lb)
SCR / Diode Block
Size
Bolt Size
Max
Bolt Size
Max
104 Amp
10-32 X 1.25
19.0
5mm
31
162 Amp
10-32 X 1.25
19.0
6mm
65
250 Amp
10-32 X 1.25
19.0
8mm
132
285 Amp
10-32 x 1.25
19.0
8mm
132
Removal
The SCR / Diode Blocks cannot be removed until the buss bars are removed first. These steps explain how to remove
the heat sink.
1) Remove the DC cable leads.
2) Remove the DC control leads (red) from the PC board.
3) Unplug the SCR / Diode Blocks gate leads.
4) Remove the secondary transformer leads from the input of the SCR / Diode Block.
5) Unscrew the two buss bars from the SCR / Diode Blocks. Note on the units where the buss bar is directly
attached to the jumper wire, leave the buss bar attached to the jumper wire and just move the buss bar away from
the SCR / Diode Blocks.
6) Now you can remove the SCR / Diode Block from the heat sink.
Replacement
1) Remove old silicone-heatsink compound from the heatsink.
2) Apply silicone heatsink compound (i.e., thermalloy 249, Aavid 1001, etc.) to the SCR / Diode Block and fasten it to
the heatsink. (Use the proper torque. See table above.)
3) Replace the heatsink into the charger case, being careful to slide it onto its holder.
4) Mount the two buss bars back to the SCR / Diode Blocks.
5) Connect the secondary transformer leads to the inputs of the SCR / Diode Blocks.
6) Reconnect the SCR / Diode Block gate leads.
7) Connect the DC control leads to the PC board.
8) Replace the DC cable leads.
Summary of Contents for Millennium-E
Page 1: ...Owner s Manual ...
Page 8: ...The Ultimate Ice Resurfacer ...
Page 96: ...The Ultimate Ice Resurfacer 88 8 9 10 11 12 13 14 18 15 16 17 ...
Page 100: ...The Ultimate Ice Resurfacer 92 ...
Page 101: ...The Ultimate Ice Resurfacer 93 ...
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Page 115: ...I B 1561 Rev B Model ES3 EnForcer SCR Battery Charger Service Manual ...
Page 148: ...EnForcer SCR Service Manual I B 1561 34 ES3 REPLACEMENT PARTS SCHEMATICS ...
Page 156: ...EnForcer SCR Service Manual I B 1561 42 SCHEMATIC DIAGRAM ES3 ...
Page 157: ...EnForcer SCR Service Manual I B 1561 43 ES3 ASSEMBLY DRAWING ...
Page 159: ...EnForcer SCR Service Manual I B 1561 45 INTERIOR VIEWS ...
Page 160: ...EnForcer SCR Service Manual I B 1561 46 SINGLE EXTRUSION HEAT SINK ASSEMBLY ...
Page 162: ...EnForcer SCR Service Manual I B 1561 48 THREE EXTRUSION HEAT SINK ASSEMBLY ...
Page 164: ...EnForcer SCR Service Manual I B 1561 50 SUB ASSEMBLY PANEL ASSEMBLY ...
Page 167: ...EnForcer SCR Service Manual I B 1561 53 DOOR ASSEMBLY ...
Page 168: ...EnForcer SCR Service Manual I B 1561 54 PARALLEL CABLES OPTIONAL ...
Page 169: ...EnForcer SCR Service Manual I B 1561 55 DISCONNECT SWITCH OPTIONAL ...
Page 170: ...EnForcer SCR Service Manual I B 1561 56 CABINET ASSEMBLY ...
Page 171: ...EnForcer SCR Service Manual I B 1561 57 CABINET ASSEMBLY EXPLODED VIEW ...
Page 174: ...EnForcer SCR Service Manual I B 1561 60 SCHEMATIC DIAGRAM ...
Page 175: ...EnForcer SCR Service Manual I B 1561 62 ES3 LARGE CABINET ASSEMBLY DRAWINGS ...
Page 176: ...EnForcer SCR Service Manual I B 1561 63 CHARGER INTERIOR VIEW ...
Page 177: ...EnForcer SCR Service Manual I B 1561 64 TRANSFORMER CONNECTIONS ...
Page 178: ...EnForcer SCR Service Manual I B 1561 65 HEAT SINK ASSEMBLY ...
Page 179: ...EnForcer SCR Service Manual I B 1561 66 HEAT SINK ASSEMBLY CON T ...
Page 180: ...EnForcer SCR Service Manual I B 1561 67 SUB ASSEMBLY PANELS ...
Page 181: ...EnForcer SCR Service Manual I B 1561 68 CABINET ASSEMBLY ...
Page 182: ...EnForcer SCR Service Manual I B 1561 69 CABINET ASSEMBLY CON T ...
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