Unit installation

27 312022000
3. Make sure end of the water tank drain hose is routed to the floor drain, then remove plug from end of the
hose and allow water to drain from tank.
CAUTION: Never use an ice pick or other instruments to remove ice from the evaporator
coils. Such practice can result in punctured refrigeration circuit.
4. Allow ice bank to melt. Hot water may be used to speed melting.
5. Thoroughly rinse inside of the water tank with clean water.
6. Install plug in end of the water tank drain hose.
7. Fill water tank with clean water until water starts flowing from the water tank overflow hose. USE LOW
MINERAL CONTENT WATER WHERE A LOCAL WATER PROBLEM EXISTS.
8. Install Cooling Unit top cover and secure with four screws.
9. Connect electrical power to the Cooling Unit at the disconnect switch.
DOUBLE LIQUID CHECK VALVE ASSEMBLIES YEARLY MAINTENANCE (OR AFTER
WATER SYSTEM DISRUPTIONS)
(see Figures 2 and 6)
WARNING: The two double liquid check valve assemblies must be inspected and serviced
at least once a year under normal circumstances, and after any disruptions (plumbing
work, earthquake, etc.) to the water supply system that might cause turbulent (erratic) flow
of water through the system. Fouled liquid check valves could cause CO
2
gas to back flow from
the carbonated water tank into the water system and create a health hazard in the system.
The two double liquid check valve assemblies are located in the plain water lines connected between the plain
water cooling coils and the carbonated water tank. Inspect and clean the double liquid check valve assemblies
as follows:
1. Disconnect electrical power from the Cooling Unit at the disconnect switch.
2. Close shutoff valve in the plain water inlet supply line.
3. Note pressure setting on the carbonator CO
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regulator, then turn the regulator adjusting screw to the left
(counterclockwise) until the regulator gage reads 0-psi.
4. Remove four screws securing the Cooling Unit top cover, then remove the cover.
5. Pull up on the carbonator tank relief valve to release CO
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pressure from the tank.
6. Remove the double liquid check valve assembly from the plain water line connected between the plain
water cooling coil and the carbonated water tank.
7. Remove one check valve from the other, then disassemble each check valve as shown in Figure 6.
8. Wipe each part with clean lint-free cloth. Inspect each part, especially the ball, for burrs, nicks, corrosion,
deterioration, and other damage. Discard ball seat and any damaged or suspicious parts and replace with
new parts during reassemble.
9. Reassemble check valves as shown in Figure 6. ALWAYS install a new ball seat (QUAD RING) (P/N
312418000.
NOTE: Make sure when assembling the check valves together, the check valve female end with white
tapered gasket inside, is on the inlet side of the double liquid check valve assembly.