RAM DBS II
Refrigeration Solid State Starter
15
5.0 Set-Up Instructions
CAUTION! Equipment is at possibly lethal AC line voltage when AC power is connected.
All phases must be disconnected by shutting down main power feed to this
unit before it is safe to touch motor terminals or control equipment parts.
5.1 Inspection
• Ensure that the starter has been installed according to the preceding guidelines.
• Ensure that the controller has been wired according to the schematics and all electrical codes.
• Check that all connections are tight. Ensure that motor shaft rotates freely.
CAUTION! Before power is applied to the starter, the following settings and
adjustments should be reviewed and appropriate changes made as required.
5.2 Setup Switches
The DBS chassis has been factory set for normal operation via switches SW1, SW2, SW3, SW4, and
SW6, on its control board - See Figure 8.
5.2.1 Motor FLA - SW1
This 16-position rotary switch setting is based on DBS chassis size and the FLA rating of the motor. Per
Table 9, Section 5, select the value closest to the Motor Full Load Current from the box that corresponds
to the DBS chassis size.
5.2.2 Current Step - SW2
This 10-position rotary switch sets the initial current step of the controller when in either Constant
Current or Step Ramp mode. This switch is adjustable from 200-425% FLA in increments of 25%. - See
Table 15, Section 9.
When the controller mode is set for Constant Current, the maximum current the motor can draw during
starting is limited until the motor reaches full speed.
When the controller mode is set for Step Ramp, the initial current drawn during starting is limited. The
Step Ramp mode then allows the motor to draw up to 500% FLA to attain full speed over a set time range.
5.0 Set-Up Instructions
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