Viper Installation, Service & Decommissioning Manual
Publication Number: 620073146SER
- 30 -
© 2022, Marmon Foodservice Technologies Inc.
Pressurizing the CO
2
System
The Viper unit is designed to operate on a CO
2
input pressure of 75 ±1 psig. If the installation location has either an independent tank
and regulator or a bulk CO
2
supply that feeds more than one machine, a shutoff valve and secondary regulator must be placed in the line
from the bulk supply to the Viper unit to reduce the CO
2
pressure at the unit to 75 ±1 psig. Perform the procedure in Table 19. to
pressurize the CO
2
system.
Table 19.
Step
Action
1
Open the CO
2
cylinder valve slightly to allow lines to slowly fill with gas. When lines
are fully pressurized, open the CO2 cylinder valve all the way until it back-seats
itself (this prevents leaks from the valve).
2
Adjust the CO
2
cylinder regulator for the unit to 75 +/- 1psig at the unit. DO NOT
TURN THE SYRUP CO
2
REGULATOR ON AT THIS TIME.
3
On the right side of the unit, verity that the expansion tank CO
2
regulator is set to
30 psig, if not correct.
NOTE: The expansion tank regulator should not be adjusted when
pressure is applied to the barrels.
4
Check and set the CO
2
barrel regulators (located on the front of the unit behind the
splash panel) so that the pressure for each barrel is set to 36 psig for sugar based
syrups.
5
The Do Not Drink and Out of Product lights remain on. The “H
2
O Out” message
should clear and the “Syrup Out” message displays.
6
NOTE: Check for CO
2
leaks by turning off the CO2 supply to the Viper. Wait
at least 3 minutes and check the CO2 cylinder gauge to see if the
pressure has dropped.
7
The Do Not Drink and Out of Product lights remain on.
Table 20. provides guidelines for machine settings based on general syrup type. Several factors, including syrup formulation, level of
citric acids, etc, will impact settings. These settings are to provide initial adjustments to achieve product overruns in the 80-120% range.
Table 20.
Syrup Type
Syrup Type
Set
Viscosity
Pressure
Expansion
FCB Syrup w/ Foam-
ing Agent
FCB
4
36-38 PSIG
30
FCB Syrup w/o
Foaming Agent
FCB
4
32-36 PSIG
30
FUB
FUB
3
N/A
30
NOTE: For citric syrups, adjust the CO
2
pressures down by 2-4 PSIG from the above to compensate for the lower CO
2
adsorption.
Summary of Contents for R-454C
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