INTRODUCTION
To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.
The NM952 is a modular ice system that fits a
variety of Scotsman ice storage bins.
It features: front service for the freezer, gearmotor,
control box, water reservoir, and bin control; an
electronic circuit for monitoring ice and water level;
a thermostatic expansion valve; and R-22 as the
refrigerant.
This manual was printed
on recycled paper.
TABLE OF CONTENTS
Installation
For the Installer
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Two units on one bin . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Start Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Service Diagnosis
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Removal and Replacement
Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Water Seal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Evaporator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
NM952
August 1993
Page 1
