37X INSTALLATION & OPERATION MANUAL
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4.8 Connecting to Gas Supply
The gas supply may come from either an independent tank with a primary/secondary regulator or a bulk tank that supplies
other equipment. If the supply is from a bulk tank, tee off the main line and install a wall-mounted secondary regulator
set to 70 PSI (483 kPa). Fabricate a 3/8” ID line from the secondary regulator (independent tank or wall mount) to the
rear of the dispenser and connect to the appropriate bulkhead fitting. This regulator should only supply gas to the frozen
beverage dispenser (and base cart if applicable). Installing a shutoff valve near the connection is recommended. For
dispensers with multiple gas connections, verify the correct gas is connected to the correct fitting. If the dispenser is on a
base cart with the BIBs and syrup pumps inside, then install a tee in the supply gas line to feed the syrup pumps.
Do not turn on the gas supply at this time.
4.9 Connecting to Syrup Supply
For installations requiring syrup lines less than 50 ft (15 m) in length, use tubing with a minimum ID of 3/8”. Run the syrup
lines from the pumps to the rear of the dispenser and connect to the proper syrup or flavor fitting.
For installations requiring syrup lines over 50 ft (15 m) in length, use tubing with a minimum ID of 1/2”. Using tubing of
any smaller diameter will lead to pressure fluctuations and false sold-out errors. Furthermore, consider installing booster
pumps on the supply lines. Increasing the regulated gas pressure on the syrup pumps (without exceeding the syrup
pump's pressure rating) can also help maintain proper supply pressure at the dispenser.
In all situations, it is recommended to install a shutoff valve near the connection to the back of the dispenser to assist with
servicing or removing the dispenser.
Do not turn on the gas supply for the syrup pumps at this time.
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