Manitowoc Ice 11M 2-18, Connecting The Pre-Charged Refrigeration Lines, Installation, Section

Installation Section 2

CONNECTING THE PRE-CHARGED

REFRIGERATION LINES

NOTE: Before connecting the pre-charged refrigeration lines, the refrigeration unit must be properly located, leveled, and the water bath filled 1" (2.5 cm) below the installed drain pipe.

1.Attach low side gauge set to service port on each line set to verify positive pressure within the line set.

NOTE: If for any reason the lines are damaged and/or leaking or the lines no longer charged, refer to “How To Re-charge the Line Sets”. If the line set is too long for the application, refer to “How to Shorten the Line Sets” in Section 3.

2.Always make the connections at the condenser first, using the end of the pre-charged lines with the valve ports.

3.Connect the condenser side with the quick connectors (discharge and liquid) up to condenser. Refer to the section titled “Aeroquip Connection” in these instructions.

4.Connect the refrigeration unit side with the quick connects (discharge and liquid). Make sure to provide a discharge trap at back of refrigeration unit, or bend discharge line down 12" and then up smoothly (no kinks) to provide a trap.

5.If a low refrigerant charge is detected, recover and recharge the system adding the unit name plate charge.

6.Repair any damages to the line sets before proceeding.

TESTING CO2 CIRCUIT FOR LEAKS

It is advisable to test the system for leaks before turning ON the water supply to the carbonator and connecting the syrup tanks. If a leak does exist, it will be easier and faster to make any correction.

1.Turn ON the CO2 supply and adjust the primary regulator to 90 psi (6.2 bar).

2.Position the CO2 tank changeover valve handle (if applicable) toward this regulator.

3.Move the air/CO2 changeover valve to the CO2 position (if applicable).

4.Allow the CO2 gas to enter the system.

5.Wait for 2 or 3 minutes before turning OFF the CO2 tank valve. This will allow the lines to expand under pressure.

6.Turn OFF the CO2 tank valve. Observe the pressure on the high pressure gauge (not the 90 psi [6.2 bar]

operating gauge). The needle may drop approximately 1 psi (.09 bar), but must remain constant and not lose pressure. Wait for several minutes.

If pressure continues to fall, this indicates there is a leak in the system which must be corrected.

The greater the leak, the faster the pressure will drop. The smaller the leak, the slower the gauge will drop.

It may be necessary to use a soap solution at all connections to locate a very small leak.

CO2 gas must be present on all valves of the tower(s)

NOTE: All soap solution must be rinsed thoroughly from tubing upon completion of testing.

TESTING SYRUP CIRCUIT (5 GALLON TANKS ONLY)

Before connecting the syrup tanks to the system, the syrup circuits must be tested for leaks with CO2 gas.

1.Connect an empty syrup tank to pre-mix syrup circuits.

2.Connect one of the CO2 gas quick disconnects to this tank. Allow the tank to fill with CO2 gas.

3.Observe the pressure of the primary CO2 tank regulator (not the 90 psi [6.2 bar]).

4.Allow the CO2 tank pressure to remain ON for a few seconds. This will allow the lines to expand to operating conditions.

5.Turn OFF the CO2 tank cylinder.

6.Check all connections from the syrup tank through the connections in the water bath area to all fittings at rear of tower.

7.Check syrup circuitry on the tower by activating the valve.

8.Follow the same procedure for the diet pre-mix beverage circuit.

If no leaks are found in the syrup circuits and the carbonated water circuit, the system is ready to be insulated and placed in operation.

2-18 Part Number 020001552 5/11