> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supplyline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Startup

> Pump priming, valve adjustment, and calibration procedures for MTC DICE dosing modules

# Startup

<sub>Source: [DICE IOM Manual V12E](https://supplyline.com/assets/MTC-IOM_DICE-DS-DM-Operating-Manual-V12E.pdf), Pages: 18–23</sub>

<Warning>
  The module is internally pressurized and handles hazardous chemicals. Use appropriate PPE: protective gloves, glasses, and clothing. Refer to the MSDS for all fluids used.
</Warning>

<Note>
  If valves were factory preset (labeled with target pressure), skip the adjustment procedures and proceed to calibration.
</Note>

## Pump Priming

The bleed valve (32) on the left side of the DICE module helps evacuate trapped gas between the pump outlet and back pressure valve.

<Frame caption="Bleed valve location on DICE module">
  <img src="https://mintcdn.com/supplyline/0BPT_a95Ro05UFU2/images/mtc/dice/diagram-of-the-dice-module-showing-the-bleed-valve.jpeg?fit=max&auto=format&n=0BPT_a95Ro05UFU2&q=85&s=692c2a5df8e8c6d7c080254ea760dc87" alt="DICE module showing bleed valve (32) on left side" width="499" height="585" data-path="images/mtc/dice/diagram-of-the-dice-module-showing-the-bleed-valve.jpeg" />
</Frame>

<Steps>
  <Step title="Start the pump">
    Begin pump cycling while observing for flow.
  </Step>

  <Step title="Open the bleed valve slightly">
    Partially unscrew the bleed valve (32) until fluid begins passing through. Only slight opening is needed—do not fully unscrew.
  </Step>

  <Step title="Close the bleed valve">
    Once fluid flows, close the bleed valve and proceed with setup.
  </Step>
</Steps>

<Tip>
  The bleed valve can also assist if the pump loses prime during normal operation.
</Tip>

## Pressure Relief Valve Adjustment

<Frame caption="Pressure relief valve adjustment components">
  <img src="https://mintcdn.com/supplyline/zAG1veafgm_55jzb/images/mtc/dice/diagram-showing-the-pressure-relief-valve-adjustme.jpeg?fit=max&auto=format&n=zAG1veafgm_55jzb&q=85&s=f51ee5ee29239b2ba80d9d62c756ceac" alt="DICE module showing adjustment screw (19) and counter nut (20)" width="677" height="685" data-path="images/mtc/dice/diagram-showing-the-pressure-relief-valve-adjustme.jpeg" />
</Frame>

<Steps>
  <Step title="Close all ball valves">
    Set all three (DS) or four (DM) ball valves to the closed position.
  </Step>

  <Step title="Pre-load the back pressure adjuster">
    Screw the back pressure adjustment screw (19') completely in (clockwise).
  </Step>

  <Step title="Start the pump">
    Run the pump until fluid passes through the pressure relief valve into the evacuation port.
  </Step>

  <Step title="Set the pressure relief set point">
    Use adjustment screw (19) to obtain the desired relief pressure. Clockwise increases the set pressure.
  </Step>

  <Step title="Lock the setting">
    Tighten counter nut (20). Max torque: **35 in-lb**.
  </Step>

  <Step title="Depressurize">
    Stop the pump and slowly open the evacuation ball valve to release system pressure.
  </Step>
</Steps>

## Back Pressure Valve Adjustment

<Frame caption="Back pressure valve adjustment components">
  <img src="https://mintcdn.com/supplyline/zAG1veafgm_55jzb/images/mtc/dice/diagram-showing-the-back-pressure-valve-adjustment.jpeg?fit=max&auto=format&n=zAG1veafgm_55jzb&q=85&s=9b774e05e21744e3abff073ad6fc128a" alt="DICE module showing adjustment screw (19') and counter nut (20')" width="677" height="717" data-path="images/mtc/dice/diagram-showing-the-back-pressure-valve-adjustment.jpeg" />
</Frame>

<Steps>
  <Step title="Set valve positions">
    Close the evacuation and calibration column valves. Open the injection valve.
  </Step>

  <Step title="Start the pump">
    Run the pump until fluid passes through the back pressure valve.
  </Step>

  <Step title="Set the back pressure set point">
    Initially unscrew adjustment screw (19'), then adjust to desired pressure. Clockwise increases the set pressure.
  </Step>

  <Step title="Lock the setting">
    Tighten counter nut (20'). Max torque: **35 in-lb**.
  </Step>
</Steps>

<Tip>
  Set back pressure to **20-30 psi above process pressure** for optimal check valve operation and siphon prevention.
</Tip>

<Accordion title="Adjustment components reference">
  | Part | Description                      | Location     |
  | ---- | -------------------------------- | ------------ |
  | 19   | Pressure relief adjustment screw | Top valve    |
  | 19'  | Back pressure adjustment screw   | Bottom valve |
  | 20   | Pressure relief counter nut      | Top valve    |
  | 20'  | Back pressure counter nut        | Bottom valve |
</Accordion>

## Dosing Pump Calibration

Complete back pressure and pressure relief valve adjustment before calibrating the pump.

<Tabs>
  <Tab title="DICE DS Calibration">
    <Steps>
      <Step title="Set valve positions">
        Close the evacuation valve (3) and injection valve (1). Open the calibration column valve (2).
      </Step>

      <Step title="Perform calibration">
        Follow your dosing pump manufacturer's calibration procedure using the calibration column.
      </Step>

      <Step title="Drain the calibration column">
        Open the evacuation valve (3) to empty the calibration column. Vent the top of the calibration column to enable complete drainage.
      </Step>

      <Step title="Return to injection mode">
        Close the evacuation valve (3) and calibration column valve (2). Open the injection valve (1).
      </Step>
    </Steps>

    ### DS Valve Positions

    | Mode             | Valve 1 (Injection) | Valve 2 (Calibration) | Valve 3 (Evacuation) |
    | ---------------- | ------------------- | --------------------- | -------------------- |
    | Calibration      | Closed              | Open                  | Closed               |
    | Draining         | Closed              | Closed                | Open                 |
    | Normal operation | Open                | Closed                | Closed               |
  </Tab>

  <Tab title="DICE DM Calibration">
    <Frame caption="DICE DM valve positions for calibration">
      <img src="https://mintcdn.com/supplyline/0BPT_a95Ro05UFU2/images/mtc/dice/diagram-of-the-dice-dm-calibration-manifold-showi.jpeg?fit=max&auto=format&n=0BPT_a95Ro05UFU2&q=85&s=9a5b549e9148176cc85ca8dee0a88125" alt="DICE DM showing valves 1, 2, 3, 4 positions" width="356" height="1562" data-path="images/mtc/dice/diagram-of-the-dice-dm-calibration-manifold-showi.jpeg" />
    </Frame>

    <Steps>
      <Step title="Set initial valve positions">
        Close the evacuation valve (3) and injection valve (1). Open the calibration column valve (2) and separation valve (4).
      </Step>

      <Step title="Perform calibration">
        Follow your dosing pump manufacturer's calibration procedure.
      </Step>

      <Step title="Isolate the chemical tank">
        Close the chemical tank isolation valve (at tank or on pump suction line).
      </Step>

      <Step title="Switch to drain mode">
        Close the separation valve (4). Open the injection valve (1).
      </Step>

      <Step title="Drain the calibration column">
        Open the evacuation valve (3) to drain the calibration cylinder.

        * **Suction lift**: Contents drain by gravity to tank below
        * **Flooded suction**: Start pump to empty contents into process
      </Step>

      <Step title="Return to injection mode">
        Close the evacuation valve (3) and calibration column valve (2).
      </Step>

      <Step title="Restore tank isolation">
        Open the chemical tank isolation valve.
      </Step>
    </Steps>

    ### DM Valve Positions

    | Mode             | Valve 1 (Injection) | Valve 2 (Calibration) | Valve 3 (Evacuation) | Valve 4 (Separation) |
    | ---------------- | ------------------- | --------------------- | -------------------- | -------------------- |
    | Calibration      | Closed              | Open                  | Closed               | Open                 |
    | Draining         | Open                | Closed                | Open                 | Closed               |
    | Normal operation | Open                | Closed                | Closed               | Closed               |
  </Tab>
</Tabs>

<Note>
  The top of the calibration column must be vented to atmosphere to enable gravity drainage through the evacuation valve.
</Note>

## Post-Startup Verification

<Steps>
  <Step title="Verify pressure">
    Confirm the pressure indicator reads the back pressure set point.
  </Step>

  <Step title="Check for leaks">
    Inspect all connections for leaks.
  </Step>

  <Step title="Confirm valve positions">
    Verify all ball valves are in the correct position for normal operation.
  </Step>

  <Step title="Document set points">
    Record the set points for future reference.
  </Step>
</Steps>

If the pressure indicator does not show the expected back pressure reading, refer to [Troubleshooting](/docs/mtc/dice/troubleshooting).

***

## Related Products

<CardGroup cols={2}>
  <Card title="DICE DS — Suction Lift" icon="cube" href="https://supplyline.com/product/mtc/dice/ds">
    1/2" module for suction lift applications
  </Card>

  <Card title="DICE DM — Flooded Suction" icon="cube" href="https://supplyline.com/product/mtc/dice/dm">
    1/2" and 1" modules for flooded suction
  </Card>
</CardGroup>

## Sources

<Card title="DICE IOM Manual V12E" icon="file-pdf" href="https://supplyline.com/assets/MTC-IOM_DICE-DS-DM-Operating-Manual-V12E.pdf" horizontal>
  Pages 18–23 • July 2022
</Card>