Water And Drain Requirements; Potable Water Requirements; Drain Connections; Cooling Tower Applications - Manitowoc RFF Installation, Operation And Maintenance Manual

Installation Instructions

Water and Drain Requirements

POTABLE WATER REQUIREMENTS

Follow these guidelines to install water inlet lines:
• Do not connect the ice machine to a hot water supply.
Be sure all hot water restrictors installed for other
equipment are working. (Check valves on sink faucets,
dishwashers, etc.)
• If water pressure exceeds the maximum of 80 psig
(552 kPA) recommended pressure, obtain a water
pressure regulator from your local plumbing supply
house.
• Install a water shut-off valve and union for both the ice
making and condenser water lines.
• Insulate water inlet lines to prevent condensation.
• Plumbing must conform to local codes.
Do not apply heat to water valve inlet fitting or over-
tighten. This will damage plastic water inlet connection.

DRAIN CONNECTIONS

Follow these guidelines when installing drain lines to prevent
drain water from flowing back into the ice machine and
storage bin:
• Drain lines must have a 1.5 inch drop per 5 feet of run
(2.5 cm per meter), and must not create traps.
• The floor drain must be large enough to accommodate
drainage from all drains.
• Run separate bin and water-cooled condenser drain lines.
Insulate them to prevent condensation.
• Vent the ice machine drain to the atmosphere. The ice
machine drain requires an 18" (46 cm) vent. Do not vent
the condenser drain on water-cooled models.
• Drains must have a union or other suitable means to
allow in-place disconnection from the ice machine when
servicing is required.
14
Caution

COOLING TOWER APPLICATIONS

A water cooling tower installation does not require
modification of the ice machine. The water regulator valve
for the condenser continues to control the refrigeration
discharge pressure.
It is necessary to know the amount of heat rejection, and
pressure drop through the condenser and water valves (inlet
and outlet) when using a cooling tower on an ice machine.
• Water entering the condenser must not be lower than
37°F (3°C) or exceed 90°F (32°C).
• Water flow through the condenser must not exceed 5 gal.
(19 L) per minute.
• Allow for a pressure drop of 7 psi (48 kPa) between the
condenser water inlet and the outlet of the ice machine.
• Water exiting the condenser must not exceed 110°F
(43°C).

ICE MACHINE WATER USAGE

Series
Ice Machine
UFF0200 - UFP0200 - UNP0200
RFF0320 - RNF0320 - RFP0320
RNF0620 - RNP620
RFF0620 - RFP0620
RNF1100 - RNP1100
RFF1300
RFF2500
Part Number 000017542 Rev 00 8/22
Section 2
Potable Water Condenser
Gal/100Lbs Ice Gal/100Lbs Ice
12.0 —
12.0 —
12.0 109
12.0 106
12.0 131
12.0 116
12.0 138