Download (spec E-F) Transfer Switch Service manual (12

Preheat Time Delay
1. Open the transfer switch cabinet door.
2. Determine the preheat time delay required (Refer
START
DISCONNECT
RELAY
OVERCRANK REL.AY
OPTIONAL
PREHEAT TIME DEILAY
to the generator set Operators Manual). The preheat time delay has a range of 0.6 to 60 seconds.
3. The relay adjustment settings are marked in
increments that range from 0 to 100 percent. A
100 percent setting equals a 60 second delay, a 50
percent setting equals a 30 second delay, etc.
Turn the knob clockwise to increase the delay
and counterclockwise to decrease the delay.
4. Close the cabinet door and reconnect the normal
power source.
5. Connect the negative battery cable to the starting
battery and place the set operation selector
switch in the automatic position.
SC-1140
FIGURE 11. TWO TO THREE WIRE CONVERTER
High voltages within the cabinet
present an electrical shock hazard
that can cause severe personal injury or death. Disconnect all sources of AC power from the transfer
switch before servicing.
Overcrank Relay
1. Open the transfer switch cabinet door.
2. Determine the overcrank time delay required.
The standard overcrank relay has a range of 0.6 to
60 seconds. The optional relay with the Failed to
Start contacts has a range of 6 to 60 seconds.
3. The relay adjustment settings are marked in
increments that range from 0 to 100 percent. A
100 percent setting equals a 60 second delay, a 50
percent setting equals a 30 second delay, etc.
Turn the knob clockwise to increase the delay
and counterclockwise to decrease the delay.
4. If the optional preheat time delay is included, go
on to the next section. If the preheat time delay is
not included, close the cabinet door and reconnect the normal power source.
5. Connect the negative battery cable to the starting
battery and place the set operation selector
switch in the automatic position.
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