
77X INSTALLATION & OPERATION MANUAL
771/772/773/774 MODELS
13
5.2 Initial Power Up
Plug the dispenser into the power supply and verify the dispenser turns on by looking at the LCD located behind the
merchandiser. The display should be on the home screen showing the status of the barrels (see Section 7 for additional
information on keypad buttons and how to navigate through menus). If the firmware has just been updated, then the
dispenser will prompt the operator to answer the following questions:
1. Desired language.
2. Number of barrels.
3. Dispenser serial number.
After responding to the prompted questions, the home screen will be displayed.
Next, a few verifications will need to be made:
For multi-flavor dispensers, the following will also need to be completed:
† Use the display pressure readouts when adjusting the settings.
‡ The water pump output pressure should be 15 to 20 PSIG (103 to 138 kPag) above the unregulated gas (or “Main Gas”)
pressure. See the troubleshooting section if the pressures are not correct.
§ The dispenser will tolerate fluctuations in regulated gas (or “Gas #1”/”Gas #2”) from 50 to 70 PSIG (345 to 483 kPag)
because it will automatically compensate. It is best to ensure during setup that the regulated gas is as close to 60 PSIG
(414 kPag) as possible.
1
Press the green check button and then select the MENU option. Next, select the READOUTS option.
2
Press the COMMON button.
3
Verify the line voltage is at 230V ± 10%.
4
Verify the unregulated gas pressure (or “Main Gas” for universal gas configurations) is between 70 to
72 PSIG (483 to 496 kPag)
†
and adjust the regulator if needed.
5
Verify the water pressure is between 85 to 92 PSIG (586 to 634 kPag)
†
. This is not adjustable.
‡
6
Verify the regulated gas pressure (or “Gas #1”/”Gas #2” for universal gas configurations) is
approximately 60 PSIG (414 kPag) and adjust the regulator if needed.
§
7
Press the BARREL button.
8
Verify the syrup pressures are between 70 and 72 PSIG (483 and 496 kPag) and adjust the back
room regulator if needed.
9
Dispense product from the sample valve after adjusting any pressures. This will restabilize to the
new pressure.
10 Press the FLAVOR button in the READOUTS menu.
11 Verify the syrup pressures for each of the flavors are between 70 and 72 PSIG (483 and 496 kPag)
and adjust the regulator if needed.
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