Manitowoc Multiplex 42 MR04, Инструкция по установке, эксплуатации и обслуживанию

Страница: 29 / 52

Part Number 020002365 08/25/2015 29
Section 2 Installation
CONNECTING THE PRE-CHARGED REFRIGERATION
LINES
Important
When the connections are made, the seal in the
couplings are broken and if removed for any reason, the
refrigerant charge will be lost.
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, the lines are no longer charged or if the line set is
too long for the application, refer to “Installing the Multiplex
Remote Condenser”.
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
TESTING CO
2
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 CO
2
supply and adjust the primary
regulator to 90 psi (6.2 bar)(620528.156099999906
Pascals).
2. Position the CO
2
tank changeover valve handle (if
applicable) toward this regulator.
3. Move the air/CO
2
changeover valve to the CO
2
position
(if applicable).
4. Allow the CO
2
gas to enter the system.
5. Wait for 2 or 3 minutes before turning OFF the CO
2
tank
valve. This will allow the lines to expand under pressure.
6. Turn OFF the CO
2
tank valve. Observe the pressure
on the high pressure gauge (not the 90 psi [6.2 bar]
[620528.156099999906 Pascals] operating gauge).
The needle may drop approximately 1 psi (.09 bar)
(6894.75729 Pascals), 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.
CO
2
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 CO
2
gas.
1. Connect an empty syrup tank to pre-mix syrup circuits.
2. Connect one of the CO
2
gas quick disconnects to this
tank. Allow the tank to fill with CO
2
gas.
3. Observe the pressure of the primary CO
2
tank regulator
(not the 90 psi [6.2 bar][620528.156099999906
Pascals]).
4. Allow the CO
2
tank pressure to remain ON for a few
seconds. This will allow the lines to expand to operating
conditions.
5. Turn OFF the CO
2
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.