Manitowoc MINI series, Installation And Maintenance Instructions Manual, Page: 20 / 30

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3. Connect Water Supply Lines
The Installer/Owner is responsible for the correct water connection of the MINI. When connecting
water supply lines observe the following instructions, and any and all other applicable national,
state, and local codes and regulations:
a. Connect the MINI to COLD WATER
b. Never connect the MINI to HOT WATER! The condenser system will not work properly if
connected to HOT or WARM water.
c. The water supply must have a minimum dynamic (flow) pressure of 35 psi (2.4 kg/cm²) and a
maximum static pressure of 80 psi (4.1 kg/cm²).
d. If the static pressure is above 80 psi, a pressure regulator must be used and set at
approximately 50 psi. Pressure above 80 psi can damage solenoid valves.
e. MINIs have two connection points for incoming water. See Figure 2-1.
f. Stacked MINIs may be connected to the water supply as shown in Figure 2-2
g. 2 in 1 minis have 3 connection points. See Figure 2-3.
h. Water supply must meet the minimum requirements shown in the Warranty and Table 2-3.
Install a water treatment system as needed.
i. Installation Requirements:
1) Apply non-hardening pipe thread sealant to all the threaded connections except the ¾”
GHT Female (Garden Hose Thread or National Hose Thread) connections at the Water
Connection. GHT or NHT connections do not require pipe thread sealant.
2) Install a manual water shut-off valve (not provided) between main water supply lines and
MINI supply lines.
3) The National Sanitation Foundation (NSF) requires installation of a check-valve (or other
approved anti-backflow / anti-siphon device) (not provided) in all supply lines in
accordance with and as required by local, state, and national health, sanitation and
plumbing codes.
4) Check local codes to determine exactly what type of anti-backflow / anti-siphon device is
necessary to meet local requirements.
4. Test Water Supply Lines
a. Check all connections for proper tightness.
b. Remove rear and top panels to inspect water connections inside the MINI.
c. Open the water supply valves.
d. Check all lines and connections for leaks, both inside and outside the MINI.
e. Replace the top and rear panels and secure them to the MINI before starting the MINI.