Tyler Refrigeration NFX Supplement

Installation & Service
Manual
NFX, NFSX, NCSX, NFSGX, NCSGX
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. 9037163 REV. C
Tyler Refrigeration * Niles, Michigan 49120
OPEN WELL FROZEN FOOD & ICE CREAM MERCHANDISERS
Low Temperature Self Serve Display Cases

CONTENTS
Page
Specifications
NFX/NFSX/NCSX/NFSGX/NCSGX 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Case Pull-Up Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1” Solid Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Plexiglas Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Trim Installation/Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Plumbing Procedures . . . . . . . . (See General-UL/NSF I&S Manual)
Refrigeration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Optional Dual Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Defrost Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Defrost Control Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation Procedure Check Lists (See General-UL/NSF I&S Man.)
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
NFX/NFSX/NCSX/NFSGX/NCSGX
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 Riser Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Front Air Duct Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Rear Riser Canopy Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Front Cladding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 2 November, 2007

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
November, 2007 Page 3
The following Low Temperature Open Well Frozen Food and Ice Cream Merchandiser models
are covered in this manual:
MODEL DESCRIPTION
NFX/NFSX 8’ & 12’ OPEN WELL FROZEN FOOD MERCHANDISER
NCSX 8’ & 12’ OPEN WELL ICE CREAM MERCHANDISER
NFSGX 8’ & 12’ GLASS FRONT OPEN WELL FROZEN FOOD MERCHANDISER
NCSGX 8’ & 12’ GLASS FRONT OPEN WELL ICE CREAM MERCHANDISER
Page
Service Instructions
Preventive Maintenance . . . . . . (See General-UL/NSF I&S Manual)
Fan Blade and Motor Replacement (See Gen.-UL/NSF I&S Manual)
Color Band and Bumper Replacement (See Gen.-UL/NSF I&S Man.)
NSF Product Thermometer Replacement . . . . . . . . . . . . . . . . . . 14
Defrost Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Anti-Sweat Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Front Glass Replacement (NFSGX/NCSGX) . . . . . . . . . . . . . . . . 15
Parts Information
Cladding and Optional Trim Parts List . . . . . . . . . . . . . . . . . . . . . 16
Operational Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TYLER Warranty . . . . . . . . . . . . . . . . . (See General-UL/NSF I&S Manual)

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 4 March, 2008
SPECIFICATIONS
NFX/NFSX/NCSX/NFSGX/NCSGX Open Well FF & IC Merchandisers

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
March, 2008 Page 5

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 6 March, 2008

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
January, 2006 Page 7
INSTALLATION PROCEDURES
Carpentry Procedures
Case Pull-Up Locations
The NFX/NFSX/NCSX/NFSGX and NCSGX
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.
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 line-up. 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 adja-
cent 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.
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 tempera-
ture 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 sole-
noid 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 sole-
noid open, the coil pressure operates at 12
psig with a temperature of -29°F. When the

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 8 November, 2007
toggle switch is flipped, the solenoid closes
directing the flow through the EPR valve. If
the EPR valve is set for 48 psig, the evapora-
tor 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 uninter-
rupted, 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 front glass have an additional
anti-sweat heater under the glass retainer.
Anti-sweat heaters are wired directly to the
main power supply so they can operate at
all times.
Defrost Information
See “General-UL/NSF I&S Manual” for
operational descriptions for each type of
defrost control.
Defrost Control Chart
NFX/NFS(G)X/NCS(G)X
Defrost
Defrost Defrosts Duration Term.
Type Per Day (Min) Temp.
Electric/FF 1 60 50°F
Elec/IC/MED 1 36 50°F
Gas/FF 2-3 20-25 55°F
Gas/IC 1 25-30 55°F
Gas/MED 2-3 16-20 55°F
Most klixons are located on the end of the
evaporator coil. Klixon uses are as follows:
Electric Defrost Termination, Electric Defrost
Failsafe (Opt.), Gas Defrost Fan Delay (Dual
Temp) and Glass Anti-Sweat (Dual Temp).
NOTE
The defrost termination klixon for gas
defrost is located at the bypass check
valve.
CAUTION
If electronic sensors are used in place of
the klixons, the sensors must be located
in the same location as the klixons for that
defrost type. Any other locations will effect
the refrigeration efficiency of the case.
WIRING DIAGRAMS
ELECTRICIAN NOTE - OVERCURRENT
PROTECTION
120V circuits should be protected by 15 or 20 Amp
devices per the requirements noted on the cabinet
nameplate or the National Electrical Code, Canadian
Electrical Code - Part 1, Section 28. 208V defrost
circuits employ No. 12 AWG field wire leads for field
connections. On remote cases intended for end to
end line-ups, bonding for ground may rely upon the
pull-up bolts.
The following wiring diagrams on pages 9 thru
11 will cover the NFX/NFSX/NCSX/NFSGX/
NCSGX case circuits and dual temp circuits
with electric and hot gas defrost options.

November, 2007 Page 9
NFX/NFSX/NCSX/NFSGX/NCSGX Domestic & Export (50 Hz) Case Circuits

Page 10 November, 2007

November, 2007 Page 11
Dual Temperature Control Circuits

Page 12 November, 2007

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 13November, 2007
CLEANING AND SANITATION
Component Removal and
Installation Instructions for
Cleaning
Bottom Trays
1. Remove product from bottom of case.
2. Grasp and lift out each of the bottom trays
from the case interior and carefully
remove through the door openings
3. After cleaning, replace in reverse order.
NSF Product Thermometer
Remove four screws and product thermome-
ter bracket assembly from right rear location
in the case. After cleaning, replace product
thermometer bracket assembly and secure
with four screws.
Discharge Air Honeycomb
1. Remove screws and bottom retainer strip
from front or rear interior of case.
NOTE
Note position of the honeycomb grid
during removal so it can be reinstalled
the same way.
2. Remove honeycomb grid sections from
the front or rear duct.
CAUTION
Improper installation of the honeycomb
grid section could result in improper air
flow and/or poor refrigeration.
3. After cleaning, replace honeycomb grid
sections as they were removed and
secure with the bottom retainer strip
and screws.
Rear Duct Panels
1. Remove bottom trays and discharge air
honeycomb, see this page.
2. Remove mounting screws from rear
duct panel.
3. After cleaning, replace in reverse order.
Front Air Duct Panels
1. Remove bottom trays, see this page.
2. Remove screws and front air duct panels
from case.
3. After cleaning, replace in reverse order.
Rear Riser Canopy Cover
(NFSX/NCSX/NFSGX/NCSGX)
1. Remove screws and rear riser joint trim.
2. Remove screws, price tag molding and
rear riser canopy cover from top of case.
3. After cleaning, replace rear riser canopy
cover and remaining components in
reverse order.
Front Cladding
1. Remove front kickplate and raceway
cover.
2. Remove screws from bottom and top of
front cladding and pull cladding down to
remove it from behind the bottom edge
of the bumper retainer.
3. After cleaning, replace front cladding
and remaining front components in
reverse order.

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 14 November, 2007
SERVICE INSTRUCTIONS
See “General-UL/NSF I&S Manual” for fan
blade and motor replacement, color band
and bumper replacement and raceway
cover removal instructions.
NSF Product Thermometer
Replacement
1. Remove four screws (1) and thermometer
bracket (2) from rear of case.
2. Remove two screws, nuts, washers and
the product thermometer (3) from the
thermometer bracket (2).
3. Install and secure a new product ther-
mometer (3) on the thermometer bracket
(2) with two screws, washers and nuts.
4. Install thermometer bracket (2) on rear of
case with four screws (1).
Defrost Heater Replacement
WARNING
Always shut off electricity to case before
replacing a defrost heater. Automatic
cycling of fans or electrical power to wire
ends could cause personal injury and/or
death.
1. Remove bottom trays from case.
2. Unclip and lift up fan plenum (1).
3. Disconnect defective defrost heater (2)
and remove from mounting clips (3)
and case.
4. Install new defrost heater (4) in reverse
order.
5. Restore electrical power to case.
Anti-Sweat Replacement
WARNING
Shut off or disconnect power supply
to case before changing an anti-sweat.
Electrical power from wire ends could
damage other components and/or cause
personal injury or death.

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
November, 2007 Page 15
Discharge Air Grid Anti-Sweat
(NFX Only)
1. Remove screws and rear guard trim (1)
from top of rear case wall (2).
2. Disconnect or cut the defective anti-sweat
wire (3) from the case wires.
3. Remove and replace the aluminum tape
(4) and defective anti-sweat wire (3) from
top of rail and wire trim assembly (5).
4. Reconnect anti-sweat wires to case wires.
Reinstall rear guard trim (1) and secure
with screws.
Canopy Anti-Sweat Locations
(NFSX/NCSX/NFSGX/NCSGX)
Night Cover Shelf
with Light
Night Cover Shelf
without Light
Front Glass Replacement
(NFSGX/NCSGX)
1. Unplug or disconnect heated glass
panels and glass retainer anti-sweat
wires (1).
2. Remove two screws (2) and glass joint
trim (3) from both joints of the broken
glass (4).
3. Remove screws (5) and glass trim rail (6)
from top of glass (4).
4. Loosen rear retainer (7) and remove
broken glass (4) from glass retainer
assembly (8).
NOTE
Inspect the anti-sweat wire in glass
retainer assembly. If wire is damaged or
broken, replace it before replacing the
front glass.
5. Apply sealant tape to top and bottom
edge of new glass (4).
6. Position new glass (4) in glass retainer
assembly (8) and secure by tightening
rear retainer (7).
7. Install glass trim rail (7) with screws (6)
over top edge of new glass (4).
8. Install glass joint trim (3) with two screws
(2) over the joint areas of glass (4).
9. Reconnect heated glass panels and glass
retainer anti-sweat wires (1).

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 16 November, 2007
PARTS INFORMATION
Cladding and Optional Trim Parts List
NFX, NFSX, NCSX, NFSGX and NCSGX
Item Description 8’ 12’
1 Screw (NFX) 5205439 (4) 5205439 (4)
2 Lower Rear Riser Joint Trim (NFX) 5182434 5182434
3 Top Rear Riser Joint Trim (NFX) 5629361 5629361
4 Screw (NFX) 5058099 (4) 5058099 (4)
5 Screw (NFS(G)X/NCS(G)X) 5058099 (4) 5058099 (4)
6 Top Shelf Joint Trim 5629360 5629360
(NFS(G)X/NCS(G)X)
7 Lower Top Shelf Joint Trim
without light)(NFS(G)X/NCS(G)X) 5182435 5182435
8 Screw (NFS(G)X/NCS(G)X) 5205439 (4) 5205439 (4)
9 Screw (NFS(G)X/NCS(G)X) 5205439 (2) 5205439 (2)
10 Lower Top Shelf Joint Trim
(with light)(NFS(G)X/NCS(G)X) 5128761 5128761
11 Screw 5145037 (4) 5105037 (4)
12 Return Air Duct Joint Trim 5203017 5203017
13 Hand Rail Backer 9025316 9025316
14 Color Band Backer, Ptd. 9040223 9040223
(NFX/NFSX/NCSX)
15 Bumper Backer ---- color per order ----
16 Horizontal Joint Trim 5127503 5127503
17 Cladding Retainer 9300197 (4) 9300197 (4)
Screw 5183536 (8) 5183536 (8)
18 Raceway Cover Backer ---- color per order ----
19 Raceway 9300218 9300219
Screw 5183536 (18) 5183536 (18)
Kickplate Hanger 9300210 (6) 9300210 (8)
Screw 5183536 (12) 5183536 (16)
20 Raceway Cover End Trim ---- color per order ----
21 Raceway Cover Retainer 9023841 (4) 9023841 (6)
22 Screw 5183536 (8) 5183536 (12)
23 Metal Kickplate, Ptd. 9324399 9324406
Kickplate Joint Trim, Ptd. 9324550 9324550
Screw, BLK. 9324612 (6) 9324612 (6)
24 Shoulder Screw 9025833 (6) 9025833 (8)
25 Kickplate Support Assy. (3) (4)
26 Raceway Cover ---- color per order ----
27 Shoulder Screw 9025833 (18) 9025833 (26)
28 Front Cladding, Ptd. 9025637 9025638
(NFX/NFSX/NCSX)

Installation & Service Manual
NFX, NFSX, NCSX,
NFSGX, NCSGX
November, 2007 Page 17
Item Description 8’ 12’
Front Cladding, Ptd, (NFSGX/NCSGX) 9036715 9036716
29 Bumper ---- color per order ----
30 Color Band, Ptd. (NFX/NFSX/NCSX) 9023798 9023800
31 Bumper Retainer/Hand Rail ---- color per order ----
Bumper Retainer 9025058 9025061
32 Bumper End Trim ---- color per order ----
33 Glass Trim (NFSGX/NCSGX) 9031808 9031808
34 Screw 5048626 (2) 5048626 (2)
35 Color Band, Ptd (NFSGX/NCSGX) 9020971 9020972
Color Band Backer (NFSGX/NCSGX) 9025982 9025982

NFX, NFSX, NCSX,
NFSGX, NCSGX
Page 18 November, 2007
Operational Parts List
(Models NFX/NFSX/NCSX/NFSGX/NCSGX)
Case Usage Domestic Export
Electrical Circuit 115 Volt 60 Hertz 220 Volt 50 Hertz
Case Size 8’ 12’ 8’ 12’
Fan Motor 5125532 5125532 5126572 5126572
5 Watt 5 Watt 5 Watt 5 Watt
Fan Motor Brackets 5213132 5213132 5213132 5213132
Fan Bracket Plate 9041077 9041077 9041077 9041077
Fan Blades (6” 21° 3B) 5105621 5105621 ---- ----
(6” 27° 3B) ---- ---- 5104294 5104294
Opt. ECM Fan Motor 9025002 9025002 ---- ----
8 Watt 8 Watt
Opt. ECM Fan Motor Brackets 5205279 5205279 ---- ----
Opt. ECM Fan Blades
(6” 25 1/4° 3B) 9025138 9025138 ---- ----
Anti-Sweat Heater Wire
(Hi-Watt) 5124818 5124819 5081149 5081150
(Lo-Watt) 5124216 5124217 5081147 5081148
(glass retainer) 5218331 5218332 5081149 5081150
(NFSGX/NCSGX)
Electric Def. Heater 5960934 5960935 5088278 5088279
Electric Def. Term. Klixon 5125211 5125211 5125211 5125211
Opt. Gas Def. Fan Delay Klixon 9023503 9023503 9023503 9023503
Opt. Gas Def. Term. Klixon 9023508 9023508 9023508 9023508
T-8 Electronic Ballast
(NFS(G)X/NCS(G)X)
(rear shelf) 5991029 5991030 9028437 9028438
T-8 Lampholder 5092414 5092414 5092414 5092414
NSF Product Thermometer 5967100 5967100 5967100 5967100
For information on operational parts not listed above contact the TYLER Service Parts
Department.