Introduction - Northern Lights TECHNICOLD OM-NI Operator's Manual

Equipment Overview
Your ice machine consists of several main components. The
compressor, condenser coil, evaporator, auger, auger motor,
expansion valve, solenoid, water reservoir and electrical
control. Additionally you require a bin sensor, insulated
transport tube, fresh water filtration system, seawater pump,
sea strainer, piping and fittings.
Environmental Conditions
Ambient and water temperatures can affect system perfor-
mance. Only operate the machine within the design param-
eters. Failure to do so can cause damage to the system and void
the warranty. See the Specifications section for more details
How It Operates
The ship's fresh water supply connects to the filtration
system (Mandatory Item). Flex tubing or soft drawn copper
pipe is routed and connected between the filtration system
and fresh water inlet on the unit. A 45˚ SAE flare connec-
tion is standard on the unit. There is a special adapter for a
compression fitting if needed. The tubing must be new and
clean; do not use old tubing or water filters.
Fresh water from the filter feeds the water reservoir and has
a control solenoid on the inlet of the reservoir. This solenoid
closes when the ice machine is not in operation.

Introduction

The fresh water is regulated into the evaporator where it
freezes on the walls. The Auger motor rotates the auger to
scrape the ice build-up off the walls. The harvested ice is
compacted and pushed towards the auger outlet.
A 0.75" reinforced hose connects the auger outlet to the ice
bin. Insulate the hose and route it in a direct route toward
the bin, avoiding dips, bends and high spots along its path.
Support the hose at designated intervals and must be one
continuous hose. Do not connect two pieces of hose together.
The bin level sensor shuts off the ice machine when the bin
is full. The system automatically restarts when the ice level
drops and the sensor opens.
The condenser coil cools the refrigerant circuit and requires
adequate seawater flow. A centrifugal pump draws the raw
water through a sea strainer to the inlet of the condenser
coil. The water passes through the coil and draws heat out
of the refrigerant circuit; the heated water is then discharged
overboard. A TE250 pump will suffice for most applications.
It is recommended that the ice machine has a dedicated raw
water circuit with its own pump. If a shared pump is used
the flow rate to the ice machine must be verified.
The ice machine control operates and monitors the system.
If a fault condition occurs the control will shut the system
down to protect the components. See the Commissioning
and Troubleshooting sections for more details.
OM-NI 2/20
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