Tyler Advantage NFNX, AdvantageNCNX, AdvantageNFNGX, AdvantageNCNGX Installation & Service Manual

Installation & Service

Manual

NFNX, NCNX, NFNGX, NCNGX

This manual has been designed to be used in conjunction with the

General (UL/NSF) Installation & Service Manual.

Save the Instructions in Both Manuals for Future Reference!!

This merchandiser conforms to the American National Standard Institute & NSF International Health and Sanitation standard ANSI/NSF 7 - 2003.

PRINTED IN Specifications subject to REPLACES ISSUE PART
IN U.S.A. change without notice. EDITION

1/06 DATE 11/07 NO. 9037143 REV. C

Tyler Refrigeration * Niles, Michigan 49120

NARROW ISLAND FROZEN FOOD & ICE CREAM MERCHANDISERS

Low Temperature Self Serve Display Cases

CONTENTS

Page

Specifications

NFNX/NCNX/NFNGX/NCNGX Specification Sheets . . . . . . . . . . . . . 4

Line Sizing Requirements . . . . . . (See General-UL/NSF I&S Manual)

Pre-Installation Responsibilities . . . . . (See General-UL/NSF I&S Manual)

Installation Procedures

Carpentry Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Case Pull-Up Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1” Solid Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Plexiglas Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Trim Installation/Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Plumbing Procedures . . . . . . . . (See General-UL/NSF I&S Manual)

Refrigeration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Optional Dual Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electrical Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Defrost Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Defrost Control Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation Procedure Check Lists (See General-UL/NSF I&S Man.)

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

NFNX/NCNX/NFNGX/NCNGX

Domestic & Export (50 Hz) Case Circuits . . . . . . . . . . . . . . . . . . . . . 9

Dual Temperature Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . 11

Cleaning and Sanitation . . . . . . . . . . . . (See General-UL/NSF I&S Manual)

Component Removal and Installation Instructions for Cleaning 13

Bottom Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

NSF Product Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Discharge Air Honeycomb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Rear Air Duct Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Front Air Ducts Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Corner Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Front Cladding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

NFNX, NCNX, NFGNX,
NCNGX

Page 2 November, 2007

The following Low Temperature Narrow Island Frozen Food and Ice Cream Merchandiser
models are covered in this manual:

MODEL DESCRIPTION

NFNX 8’ & 12’ NARROW ISLAND FROZEN FOOD MERCHANDISERS

NCNX 8’ & 12’ NARROW ISLAND ICE CREAM MERCHANDISERS

NFNGX 8’ & 12’ GLASS FRONT NARROW ISLAND FROZEN FOOD

MERCHANDISERS

NCNGX 8’ & 12’ GLASS FRONT NARROW ISLAND ICE CREAM

MERCHANDISERS

Installation & Service Manual

NFNX, NCNX, NFNGX,

NCNGX

November, 2007 Page 3

Page

Service Instructions

Preventive Maintenance . . . . . . (See General-UL.NSF I&S Manual)

Fan Blade and Motor Replacement (See General-UL/NSF I&S Man.)
Color Band and Bumper Replacement (See Gen.-UL/NSF I&S Man.)

NSF Product Thermometer Replacement . . . . . . . . . . . . . . . . . . 14

Corner Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Defrost Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Anti-Sweat Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Front Glass Replacement (NFNGX/NCNGX) . . . . . . . . . . . . . . . . 16

Parts Information

Operational Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Cladding and Optional Trim Parts List . . . . . . . . . . . . . . . . . . . . . 18

NFNX and NCNX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

NFNGX and NCNGX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

TYLER Warranty . . . . . . . . . . . . . . . . . (See General-UL/NSF I&S Manual)

NFNX, NCNX, NFGNX,
NCNGX

Page 4 March, 2008

SPECIFICATIONS

NFNX/NCNX/NFNGX/NCNGX Narrow Island FF & IC Merchandisers

Installation & Service Manual

NFNX, NCNX, NFNGX,

NCNGX

March, 2008 Page 5

NFNX, NCNX, NFGNX,
NCNGX

Page 6 November, 2007

INSTALLATION PROCEDURES

Carpentry Procedures

Case Pull-Up Locations

The NFNX/NCNX/NFNGX/NCNGX models have
two pull-ups at each end of the case. Pull-ups
A and B are located as shown and used for
joining all cases. All pull-ups should be
installed and tightened starting with A and
finishing with B.

1” Solid Partition

A 1” insulated partition is required between
adjacent gas defrost cases that are on
different refrigeration systems. 1” partitions are
shipped installed as specified in the case
order. Make sure the partitioned case is being
installed in the proper location in the case line­up. This assures proper refrigeration to all
parts of the case line-up.

Apply sealant to outside surface of partition
where the two surfaces of the adjoining case
will contact the partition.

See “General-UL/NSF I&S Manual” for
line-up assembly instructions.

After all case pull-ups have been secured,
all interior wall joint seams should be sealed
with duct tape.

Plexiglas Partition

A plexiglas plug partition is required on
adjacent electric defrost cases that are on
different refrigeration systems. These
partitions can be installed after the cases have
been joined.

1. Install partition brackets (1) at case joint
on front, center and/or rear case wall (2)
with screws 3)

2. Slide plexiglas partitions (4) into partition
brackets (1).

Trim Installation/Alignment

See “General-UL/NSF I&S Manual” for
bumper, color band, raceway and kickplate
installation.

Corner Trim Installation

Most corner trim on these cases comes
fac-tory installed. The kickplate corner trim
requires field installation.

After kickplates (1) have been installed, posi­tion kickplate corner trim (2) over both ends
of the kickplates (1) and secure with screws.

Refrigeration Procedures

See “General-UL.NSF I&S Manual” for gen­eral system, control and superheat infor­mation.

Optional Dual Temperature Control

The dual temperature control unit is a factory
installed option. This control allows the user
to easily switch from medium to low tempera­ture operation by flipping a switch. The dual
temperature control consists of an EPR valve
in the suction line coming off the evaporator.
The EPR valve can be bypassed with a sole­noid controlled bypass line around it. The
toggle switch opens or closes this solenoid.

When the solenoid is open, the evaporator is
connected directly to the compressor suction
that allows for low temperature operation.
When the solenoid is closed, the evaporator
must operate through the EPR valve which
has been preset to the desired medium
temperature.

EXAMPLE: R-404A system with 12 psig
of suction pressure. With the suction line

solenoid open, the coil pressure operates at
12 psig with a temperature of -29°F. When
the toggle switch is flipped, the solenoid
closes directing the flow through the EPR
valve. If the EPR valve is set for 48 psig, the
evaporator will see a coil temperature of 12°F
and will operate at a discharge air tempera­ture of about 22°F.

When gas defrost is used, an additional
check valve is mounted around the EPR valve
to allow reverse flow for the defrosting gas. A
fan delay is also connected with gas defrost
to cycle the fans off, but only during the
medium temperature mode.

Electrical Procedures

Electrical Considerations

CAUTION

Make sure all electrical connections are
tight. This prevents burning of electrical
terminals and/or premature component
failure.

NOTE

The raceway houses the electrical wiring
and components for the case. All raceway
covers will be shipped loose.

Case Fan Circuit

This circuit is to be supplied by an uninter­rupted, protected 120V circuit. The case fan
circuit is not cycled, except when equipped
for gas defrost. On gas defrost cases the fan
circuit is controlled by a 50/40 klixon when
used for medium temperatures.

NOTE

With gas defrost, the fans will not start
until the coil temperature reaches 40°F at
the fan delay klixon.

Anti-Sweat Circuit

All cases have at least one anti-sweat heater
in each discharge air grid and return air grid.
Cases with glass have an additional anti­sweat heater under the glass retainer. Anti­sweat heaters are wired directly to the main
power supply so they can operate at all
times.

Installation & Service Manual

NFNX, NCNX, NFNGX,

NCNGX

November, 2007 Page 7