Scotsman ND550 - Manual

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 maker-dispenser.
The ND550 is a combination nugget ice maker and
countertop dispenser, with the option of wall
mounting. A water station may be added, if desired.
The ND550 ice making section is equipped with
the following features: electronic controls for bin level and low water; thermostatic expansion valve;
front service for most components; and R502
refrigerant. The ice dispensing section is a
seamless plastic storage bin, with a stainless steel
ice agitator at the bottom to sweep the ice into the
dispensing chute.
TABLE OF CONTENTS
For the Installer
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Environmental Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Wall Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Glass Filler Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Soda Valve Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Removal and Replacement
Water Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Breaker and Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Parts Lists and Wiring Diagrams are printed on yellow paper in the center of this manual.
ND550
December, 1988
Page 1