S P E C I A L T Y
P R O D U C T S
In s ta lla tio n & S e rvic e
Ma n u a l
NSSD
THREE DECK MEAT/DELI/CRITICAL TEMP
PRODUCE MERCHANDISERS WITH CURVED FRONT GLASS
Medium Temperature Self Serve Dis play Cas es
This manual has been des igned to be us ed in conjunction with the General
(UL/NSF) Ins tallation & Service Manual.
Save the Ins tructions in Both Manuals for Future Reference!!
This merchandiser conforms to the American National Standard Institute & NSF International Health and Sanitation standard ANSI/NSF 7 - 1999.
PRINTED IN Specifications subject to REPLACES
IN U.S.A. change without notice. EDITION
ISSUE
DATE
PART
3/02
10/02
NO. 9037171
REV. A
Tyler Refrigeration Corporation * Niles, Michigan 49120
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Page
General Information
NSF Product Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Radiant Heat Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Radiant Heat Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Display Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service Ins tructions
Preventive Maintenance . . . . . . (See General-UL/NSF I&S Manual)
Light Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Ballast and Lighting Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Ballast Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Defros t Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Fan Blade and Motor Replacement (See Gen.-UL/NSF I&S Manual)
Color Band and Bumper Replacement (See Gen.-UL/NSF I&S Man.)
Anti-Sweat Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Top Light Channel Anti-Sweat Replacement . . . . . . . . . . . . . . . . . 16
Front Curved Plexiglas Replacement . . . . . . . . . . . . . . . . . . . . 16
Parts Information
Operational Parts Lis t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Cladding and Trim Parts Lis ts . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TYLER Warranty . . . . . . . . . . . . . . . . . (See General-UL/NSF I&S Manual)
The following Medium Temperature, Top Display Meat, Deli and Critical Temp Produce
Merchandiser models are covered in this manual:
MODEL
NSSD
DESCRIPTION
6’, 8’ & 12’ CURVED GLASS FRONT 3-DECK MEAT/DELI
MERCHANDISER
March, 2002
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NS S D
Tyle r Re frig e ra t io n
SPECIFICATIONS
NSSD Three Deck Meat/Deli/Critical Temp Produce Merchandis ers
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NSSD Three Deck Meat/Deli/Critical Temp Produce Merchandis ers
October, 2002
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INSTALLATION PROCEDURES
Electrical Procedures
Carpentry Procedures
Cas e Line-Up
Electrical Cons iderations
CAUTION
NOTE
Make s ure all electrical connections at com-
ponents and terminal blocks are tight. This
prevents burning of electrical terminals
and/or premature component failure.
The NSSD cas es are s hipped on cas ters that
are replaced with adjus table legs during
cas e line-up and ins tallation.
See the “General-UL/NSF I&S Manual” for
the proper cas e line-up procedures .
NOTE
The NSSD has two raceway locations that
can hous e the electrical wiring, components
and terminal blocks . All components and
wiring can be located in either the lower
front or the lower rear of the cas e.
Cas e Pull-Up Locations
Cas e Fan Circuit
This circuit is to be supplied by an uninterrupt-
ed, 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.
NOTE
With gas defros t, the fans will not s tart until
the coil temperature reaches 40°F at the fan
delay thermos tat.
Fluores cent Lamp Circuit
Case lighting is supplied by T-8 electronic
ballast lights. It is controlled by a light switch
in each case. The standard lighting is 1-row of
T-8 canopy lights. NSSD models also offer up
to 3 rows of optional T-8 shelf lights.
All NSSD models have four pull-ups at each
end of the case. Pull-ups A, B, C and D are
located as shown and should be installed and
tightend starting with A and finishing with D.
See “General-UL/NSF I&S Manual” for line-
up as s embly ins tructions .
Anti-Sweat Heater Circuit
NSSD cases have three anti-sweat heaters.
One in the top light assembly, one in the front
glass trim rail and one in the front glass retain-
er. All anti-sweat heaters are wired directly to
the main power supply so they can operate at
all times.
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CAUTION
Defros t Information
If electronic s ens ors are us ed in place of
the klixons , the s ens ors mus t be located in
the s ame location as the klixons for that
defros t type. Any other locations will
effect the refrigeration efficiency of the
cas e.
See “General-UL/NSF I&S Manual” for
operational des criptions for each type of
defros t control.
Defros t Control Chart
Defros t
Defros t Defros ts Duration
Term.
Temp.
----
50°F
55°F
WIRING DIAGRAMS
Type
Per Day
(Min)
28
ELECTRICIAN NOTE - OVERCURRENT
Off Time
Electric
Gas
6
6
6
PROTECTION
36
120V circuits s hould 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 defros t
circuits employ No. 12 AWG field wire leads for field
connections . On remote cas es intended for end to
end line-ups , bonding for ground may rely upon the
pull-up bolts .
12-15
The following wiring diagrams on pages 8
thru 11 will cover the NSSD case circuits
including all defrost and lighting wiring
circuits.
E = Electric Defros t Termination
G = Gas Defros t (Fan Delay)
F/S = Electric Defros t Fails afe (Opt.)
NOTE
The termination klixon for gas defros t is
located at the bypas s check valve at the
left end of the evaporator coil.
Most klixons are located on the right end of
the evaporator coil. The diagram shows the
location for each defrost type that uses a
klixon.
March, 2002
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NSSD Domes tic & Export (50Hz) Cas e Circuits (6’, 8’ & 12’ Cas es )
Page 8
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NS S D
Tyle r Re frig e ra t io n
3. Slowly lift out rear duct panel until the
shelf harness connector near the top of
the panel can be accessed.
CLEANING AND SANITATION
Component Removal and
Ins tallation Ins tructions for
Cleaning
4. Disconnect shelf harness connector and
complete removing the rear duct panel.
WARNING
Shelves and Shelf Brackets
Rear duct panels with electrical recepta-
cles can be cleaned without removing the
electrical receptacles . Do not get mois ture
on electrical wires when cleaning under
this cover. Mois ture on wires could caus e
premature product failure and/or pers onal
injury or death from electrical s hock.
1. Remove product from shelves.
2. If shelf has a light, unplug the light cord
from the socket in the rear duct panel.
Completely insert socket cover in the light
socket to protect the receptacle.
3. Push shelves back and then lift up and
out to remove them from the shelf
brackets.
5. After cleaning, reconnect the shelf har-
ness connector and replace and secure
rear duct panels in reverse order.
4. Remove shelf brackets from slots in rear
uprights.
Dis charge Air Honeycomb
5. After cleaning, replace in reverse order.
Bottom Trays
1. Loosen screws securing rear retainer
plate.
NOTE
1. Remove product from bottom of case.
Note pos ition of the honeycomb grid dur-
ing removal s o it can be reins talled the
s ame way.
2. Grasp and lift out each of the bottom
trays from the case interior.
3. After cleaning, replace in reverse order.
Front Air Ducts
2. Slide rear retainer plate back until the
honeycomb grid sections can be removed
from the top duct.
1. Remove lower trays, see this page.
2. Lift out front air duct sections.
3. After cleaning, replace in reverse order.
CAUTION
Improper ins tallation of the honeycomb
grid s ection could res ult in improper air
flow and/or poor refrigeration.
Rear Duct Panels
(w/o Shelf Light Sockets )
1. Remove shelves and bottom trays, see
above.
3. After cleaning, replace honeycomb grid
sections as they were removed and
secure with the rear retainer plate and
screws.
2. Remove mounting screws and rear duct
panels from case.
3. After cleaning, replace and secure rear
duct panels in reverse order.
Front Lower Cladding
1. Remove front kickplate.
(with Shelf Light Sockets )
2. Lift and pull out front lower cladding until
rear tabs clear holes in front of frame
assembly. After rear tabs are clear, pull
down on cladding to clear upper tabs
from slots in bottom of upper front
1. Remove shelves and bottom trays, see
above.
2. Remove mounting screws from rear duct
panel.
cladding and remove cladding from case.
Page 12
March, 2002
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Front Upper Cladding
Radiant Heat Information
1. Remove plexiglas from plexiglas retainer.
Remove screws and plexiglas retainer from
top of bumper retainer
1. Remove color band, bumper and bumper
retainer from the case. (See General-
UL/NSF I&S Manual.)
2. Remove front kickplate.
3. Remove screws and front lower cladding.
See page 12.
4. Remove screws from top and bottom of
upper cladding and remove front upper
cladding.
5. After cleaning, replace front upper
cladding and remaining front components
in the reverse order.
GENERAL INFORMATION
NSF Product Thermometer
Ins tallation
A wide temperature range is shown for each
type of lighting. This data does not show all
situations. Many situations will have higher
package warm-up figures than indicated.
1. Unwrap the thermometer and bracket
assembly shipped loose with the case.
2. Remove left front return air duct.
It is generally known that the temperature of
displayed meat in refrigerated cases will run
higher than the circulated air temperature of
the cases. A dial thermometer stuck into the
center of a piece of meat compared with one
in the air stream quickly confirms this fact.
Another fact is that the surface temperature
of the meat will be higher than the center
temperature due to radiant heat. TYLER’s
ongoing research identifies sources of
radiant heat and accurately measures and
records it. These charts were developed
from the information gathered during this
research. Two major sources of radiant heat
are from display lights and ceiling surfaces.
Additional heat sources come from bad
display practices which either overload the
case with product or allow voids in the
product display. Poor display practices
impair the efficiency of the refrigeration,
adding to the surface temperature of the
meat. Bacteria and molds grow when surface
3. Position bracket 1” in from left edge and
just under the bottom return air duct holes.
4. Mount the bracket to the return air duct
with two self-tapping screws.
5. Replace the front return air duct.
March, 2002
Page 13
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NS S D
Tyle r Re frig e ra t io n
temperatures rise above 45°F. This prema-
turely discolors displayed meats and causes
unnecessary meat department losses.
Ballas t and Lighting Locations
Radiant Heat Meas urement
Place two accurate dial thermometers side by
side in a case. Cover one of the thermometer
stems with black friction tape. The tempera-
ture difference is the approximate amount of
radiant heat. A change in display lighting
or a reduction of high ceiling temperatures
(over 80°F) could reduce the radiant heat in
the case.
Dis play Practices
Encourage butchers
to maintain all meat
below the case load
lines and to eliminate
product voids. Case
screens could be covered in some instances
to keep the refrigerated air over the display.
All NSSD light ballasts are located either in the
front raceway behind the lower front cladding,
or in the rear raceway behind the rear rail
cover. This includes remote ballasts for
optional shelf lights. The canopy light(s) are
under the canopy light channel in the top of
the case. The optional shelf lights are mount-
ed in separate light fixtures under the front of
each shelf section.
CAUTION
The quality damage done to meat products
by high temperatures and/or contamination
during delivery, cooler s torage, cutting and
wrapping cannot be repaired by placing
the products into properly operating dis -
play cas es .
In order to retain safety approval with
Underwriters Laboratory and the Canadian
Standards Association, the mounting of
electrical components and interconnecting
wires must not deviate from the following
instructions. Only qualified personnel are
authorized to install the accessory items.
TYLER Refrigeration recommends you order
all component parts from its Service Parts
Department.
SERVICE INSTRUCTIONS
Light Servicing
See “General-UL/NSF I&S Manual” for T-8
lamp, fan blade and motor, and color band
and bumper replacement ins tructions .
Page 14
March, 2002
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Rear Ballas t Location Replacement
1. Remove screws (1) and rear rail cover (2)
from rear of case.
NOTE
If tappit s crews are not available, a s tar-
was her s hould be us ed between the bal-
las t and the heads of the s crews .
1. Remove bottom trays (1) from case (2).
2. Install required number of ballasts (3) in
rear electrical raceway (4) with two
screws (5) each.
3. Identify and connect required wiring har-
nesses (upper, lower, etc...) to the ballast
connectors (6).
4. Replace rear rail cover (2) and secure
with screws (1).
Defros t Heater Replacement
WARNING
Always s hut off electricity to cas e before
replacing a defros t heater. Automatic
cycling of fans or electrical power to wire
ends could caus e pers onal injury and/or
death.
2. Unclip and lift up fan plenum (3).
3. Disconnect and remove defrost heater (4)
from mounting clips (5) and case (2).
4. Install new defrost heater (4) in reverse
order.
5. Restore electrical power to case.
March, 2002
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Anti-Sweat Replacement
WARNING
Front Curved Plexiglas
Replacement
Shut off or dis connect power s upply to
cas e before changing an anti-s weat.
Electrical power from wire ends could
damage other components and/or caus e
pers onal injury or death.
Top Light Channel Anti-Sweat
Replacement
1. Remove two screw (1) and plexiglas joint
trim (2) from both joints of the damaged
plexiglas (3).
2. Remove damaged plexiglas (3) from plexi-
glas retainer (4).
3. Position new plexiglas (3) in plexiglas
retainer (4).
4. Install plexiglas joint trim (2) with screw
(1) over the joint areas of plexiglas (3).
1. Remove screws (1) and lower the top
light channel assembly (2) from top of the
case (3).
2. Disconnect or cut the defective anti-sweat
wires (4) from the case wires.
3. Remove and replace the aluminum tape
(5) and defective anti-sweat wire (4) from
the back of the top light channel assem-
bly (2).
4. Position new anti-sweat wire (4) in case )
and secure with new aluminum tape (5).
5. Reconnect the new anti-sweat wires (4) to
case wires and reinstall the top light
channel assembly (2) with screws (1).
6. Restore electrical power to the case.
Page 16
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PARTS INFORMATION
Operational Parts Lis t
Cas e Us age
Domes tic
115 Volt 60 Hertz
8’
Electrical Circuit
Case Size
Fan Motor
6’
12’
5243498
9 Watt
5243498
9 Watt
5243498
9 Watt
Fan Motor Brackets
Fan Bracket Plate
5962268
9041077
9044934
5962268
9041077
9044934
5962268
9041077
9044934
Fan Blades (7” 35° 5B)
Opt. ECM Fan Motor
9025002
8 Watt
9025002
8 Watt
9025002
8 Watt
Opt. ECM Fan Motor Brackets
9025005
9044934
9025005
9044934
9025005
9044934
Opt. ECM Fan Blades (7” 35° 5B)
T-8 Ballast (canopy & shelf)
(canopy / 1-row)
5991029
5991030
9041897
9043426
5125153
5125211
9023503
9023508
5967100
5991029
5991030
9041897
9043427
5124521
5125211
9023503
9023508
5967100
5991030
5991030
9041897
9043428
5124522
5125211
9023503
9023508
5967100
(opt. shelf / 2-row or 3-row)
T-8 Lampholder (canopy or shelf)
Anti-Sweat Heater Wire (top light)
Opt. Elec. Def. Heater
Opt. Elec. Def. Limit Klixon
Opt. Gas Def. Fan Delay Klixon
Opt. Gas Def. Term. Klixon
NSF Product Thermometer
For information on operational parts not lis ted above contact the TYLER Service Parts
Department.
March, 2002
Page 17
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Cladding and Trim Parts Lis ts
NSSD
Item Des cription
6’
8’
12’
1
2
3
Screw (per cover)
Joint Trim, Rear Riser
Plexiglas, Curved
RH Plexiglas Trim Assy.
LH Plexiglas Trim Assy.
CTR Plexiglas Trim Assy.
Plexglas Retainer
Plexiglas Joint Trim
Screw
5100217 (2)
5932659
9800193
9800225
9800226
-----
5100217 (2)
5932659
9800194
9800225
9800226
-----
5100217 (2)
5932659
9800193 (2)
9800225
9800226
9800211
9800203
9800211
5100217 (2)
9800204
9800211
5100217 (2)
9800203 (2)
9800211
4
5
6
7
8
9
5100217 (2)
Bumper Retainer
----------- color per order ------------
Color Band, Ptd.
9023796
9040223
9023799
9040223
9023801
9040223
Color Band Backer, Ptd.
Bumper Backer
----------- color per order ------------
----------- color per order ------------
----------- color per order ------------
10 Bumper End Trim
11 Bumper
12 Upper Front Cladding, Ptd.
Screw
9800000
9800003
5183536 (10)
9800021
9800006
5183536 (8)
9800021
5183536 (12)
9800021
13 Upr. Frt. Cladding Joint Trim
Screw
9024814 (2)
9024814 (2)
9025833 (16)
9045243
9024814 (2)
9025833 (24)
9037941
14 Shoulder Screw, Bumper Ret. 9025833 (12)
15 Lwr. Frt. Cladding, Ptd.
16 Lwr. Frt. Cladding Joint Trim
Screw
9800212
9800024
9800024
9800024
9024814 (2)
9024937
9024814 (2)
9024938
9024814 (2)
9024939
17 Frt. Kickplate Assembly
18 Kickplate Joint Trim
Screw
9043816
9043816
9043816
5619204 (4)
9045242 (6)
5964733
5619204 (4)
9045242 (6)
5964733
5619204 (4)
9045242 (8)
5964733
19 Pipe Leg (2” X 7.25”)
20 Horizontal End Trim
21 End Close-off, Ptd.
(per patch end)
9037922
9037922
9037922
22 Opt. Rear Base Close-off
23 Rear Rail Cover, Ptd.
Screw
-----
9037907
9037908
9024929
9024928 (2)
9043080 (24)
9024929 (2)
9043080 (32)
9043080 (16)
Page 18
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