Dover TYLER Hillphoenix N6F Supplement

Installation & Service
Manual
N6F/N6FL
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
12/21
NO. 9037160
REV. D
Hillphoenix, Inc. * Conyers, GA 30013
MULTI-SHELF FROZEN FOOD MERCHANDISER
Low Temperature Self Serve Display Cases

N6F/N6FL
Page 2
December, 2021
CONTENTS
Page
Specifications
N6F/N6FL Specification Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pre-installation Responsibilities . . . . . (See General-UL/NSF I&S Manual)
Installation Procedures
Carpentry Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Case Pull-Up Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Case Fan Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fluorescent Lamp Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Plumbing Procedures . . . . . . . . (See General-UL/NSF I&S Manual)
Refrigeration Procedures . . . . . (See General-UL/NSF I&S Manual)
Defrost Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Defrost Control Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Optional Hot Gas Defrost Operation Requirements . . . . . . . . . . . . . 7
Installation Procedure Check Lists (See Gen.-UL/NSF I&S Manual)
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
N6F Domestic & Export (50 Hz) Case Circuits . . . . . . . . . . . . . 9
N6FL Domestic & Export (50 Hz) Case Circuits . . . . . . . . . . . . . 13
Cleaning and Sanitation . . . . . . . . . . . . (See General-UL/NSF I&S Manual)
Component Removal and Installation Instructions for Cleaning 17
Shelves and Shelf Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bottom Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Front Air Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Discharge Air Honeycombs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Front Cladding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Installation & Service Manual N6F/N6FL
January, 2005 Page 3
Page
General Information
NSF Product Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Night Curtains and Strip Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Case Shelving Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Service Instructions
Preventive Maintenance . . . . . . (See General-UL/NSF I&S Manual)
Ballast and Lighting Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fan Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Checking Air Velocities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cleaning Honeycomb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Anti-Sweat Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Defrost Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ambient Air Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parts Information
Cladding and Optional Trim Parts List . . . . . . . . . . . . . . . . . . . . . 22
Operational Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
TYLER Warranty . . . . . . . . . . . . . . . . . (See General-UL/NSF I&S Manual)
The following Low Temperature, Multi-Shelf Frozen Food Merchandiser models are covered
in this manual:
MODEL DESCRIPTION
N6F 6’, 8’ & 12’ MULTI-SHELF FROZEN FOOD MERCHANDISER
N6FL 6’, 8’ & 12’ MULTI-SHELF FROZEN FOOD MERCHANDISER
WITH 24 1/2” FRONT

N6F/N6FL
Page 4
December, 2021
SPECIFICATIONS
N6F/N6FL Multi-Shelf Frozen Food Merchandiser Specification Sheets

Installation & Service Manual N6F/N6FL
March, 2008 Page 5

INSTALLATION PROCEDURES
Carpentry Procedures
Case Pull-Up Locations
All N6F 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 tight-
ened starting with A and finishing with D.
See “General-UL/NSF I&S Manual” for
line-up assembly instructions.
N6F/N6FL
Page 6
December, 2021
Electrical Procedures
Electrical Considerations
CAUTION
Make sure all electrical connections at
components and terminal blocks are tight.
This will prevent burning of electrical
terminals and/or premature component
failure.
NOTE
• Lower raceway cover will be shipped
loose. See the “General-UL/NSF I&S
Manual” for raceway cover installation
and removal instructions.
• Since 208V defrost wiring enters the
rear of the case through the outer air
band, the exterior and interior access
holes must be caulked to maintain air
band separation.
Case Fan Circuit
This circuit has three sets of fans (primary,
secondary and ambient) that are 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 primary fans are controlled by a
60/30 klixon.
NOTE
With gas defrost, the primary fans will not
restart until the coil temperature reaches
30°F at the fan delay klixon.
Fluorescent Lamp Circuit
The standard case lighting system is T-8
electronic lamps. The N6F standard lighting
is 2-row of horizontal canopy lights and 1-row
of nose lights. The N6FL standard lighting is
3-row of horizontal canopy lights.

Installation & Service Manual N6F/N6FL
January, 2005
Defrost Information
See “General-UL/NSF I&S Manual” for
operational descriptions for each type of
defrost control.
Defrost Control Chart
Defrost
Defrost Defrosts Duration Term.
Type Per Day (Min) Temp.
Electric 2-3 40 55°F
Gas 3-4 22-25 60°F*
*Use 70°F with electronic defrost sensor.
The diagram shows the location for each
defrost type that uses a klixon.
NOTE
• The termination klixon (55/35 Settings) for
electric defrost is located in the right
hand end of the upper electrical raceway.
• The termination klixon for gas defrost is
located next to the rear coil 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.
N6F Optional Hot Gas Defrost Operation
Requirements
When reverse cycle gas defrosting option is
used, it should only be applied to multiple
compressor systems (Parallel racks). A maxi-
mum of not more than 25% of the load on a
given rack should defrost at one time
because the defrosting cases become a
condenser during the defrost period and the
other refrigerated cases must provide enough
heat load to keep a compressor operating.
Do not defrost more than 24 feet of the N6F
at one time to limit the amount of refrigerant
used in that circuit during the defrost.
Insulated partitions must be used between
cases in the same lineup that have
different defrost times.
Defrosts are initiated by a multi-circuit defrost
clock or an electronic defrost controller. At
the beginning of gas defrost the refrigeration
is stopped and the gas is diverted in a
reverse direction through the suction line to
the display case. The refrigeration should be
set to remain off for the complete failsafe time
plus a 5 minute drain off or clear time period.
This type of defrost operation allows the
problem areas in the case to completely clear
without subjecting the refrigerated product to
excessive warm up.
A defrost termination “klixon type” open on
rise thermostat is mounted (on the left hand
side) next to the rear coil check valve that
bypasses defrost refrigerant flow around the
expansion valve. The defrost termination
device along with the mechanical or electron-
ic defrost control should be set up to cycle or
pulse the hot gas valve during the defrost
time period. If you use a mechanical clock,
you should wire it in parallel with the hot gas
valve. If the return liquid temperature rises to
70°F, the hot gas valve should be closed until
the return liquid temperature cools to 40°F
and then the hot gas valve will reopen and
provide additional heat. This cycling will
continue until the total defrost time has
elapsed. Note that the “klixon type”
thermostat has a time lag associated with it’s
operation so its actual setting is 60°F, but if
an electronic sensor is used for termina-
tion, it should be set at 70°F termination
temperature because it is because it is faster
reacting. Also, if used with an electronic
controller, cycle the hot gas valve when the
lowest sensor temperature (minimum) has
reached 70°F.
Page 7

N6F/N6FL
Page 8
December, 2021
Electric Defrost Limit Switch /
Optional Case Temperature Thermostat
The Defrost Limit Switch and optional Case
Temperature Thermostats are located in the
top raceway with thier sensing bulbs in the
primary air band. The limit switch is factory
preset for 52°F. If defrost is too long, the
hermostat is set too high.
Adjusting the Defrost Limit Switch
Remove the fiberboard (1) from the end of
the control (2) . Turn the brass adjustment
screw (3) clockwise to raise, or counterclock-
wise to lower the termination temperature.
One turn changes temperature setting
approximately 5°F.
When there is more than one case, the control
wiring must be modified as shown below. This
puts the fourth pole on the special contactor
in a series circuit to the reset solenoid.
FOLLOW THESE INSTRUCTIONS EXACTLY!
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 cir-
cuits employ No. 10 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
16 will cover the N6F and N6FL case
circuits with electric defrost and gas defrost.
The canopy lighting circuit is covered in the
case circuit diagrams.
In addition the primary air band fans on the
N6F are cycled off during the defrost cycle
with a limit “klixon type” thermostat that is
mounted to a coil return bend on the right
hand end of the case. It will cycle the primary
fans off at 60°F and on at 30°F. This helps
minimize the product temperature warmup
during the defrost. All other fans, both
secondary and ambient airband, continue
to run during defrost.

March, 2008 Page 9
N6F Domestic & Export (50 Hz) Case Circuits (Electric Defrost)

Page 10 March, 2008

March, 2008 Page 11
N6F Domestic & Export (50 Hz) Case Circuits (Gas Defrost)

Page 12 March, 2008

March, 2008 Page 13
N6FL Domestic & Export (50 Hz) Case Circuits (Electric Defrost)

Page 14 March, 2008

March, 2008 Page 15
N6FL Domestic & Export (50 Hz) Case Circuits (Gas Defrost)

Page 16 March, 2008

Installation & Service Manual N6F/N6FL
January, 2005 Page 17
CLEANING AND SANITATION
Component Removal and
Installa-tion Instructions for
Cleaning
NOTE
See pages G-23 and G-24 in “General-
UL/NSF I&S Manual” for important safety
and cleaning instructions.
Shelves and Shelf Brackets
1. Remove product from shelves and store
properly.
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.
4. Remove shelf brackets from slots in rear
uprights.
5. After cleaning, replace in reverse order.
Bottom Trays
1. Remove product from bottom of case.
2. Grasp and lift out each of the bottom trays
from the case interior.
3. After cleaning, replace in reverse order.
Front Air Ducts
1. Remove bottom trays, see this page.
2. Lift out front air duct sections.
3. After cleaning, replace in reverse order.
Discharge Air Honeycomb
1. Outer honeycomb (ambient/secondary),
remove screws and rear retainer plate.
Inner honeycomb (primary), loosen
screws and slide rear retainer plate back
until honeycomb grid sections can be
removed.
NOTE
Note position of the honeycomb grid during
removal so it can be reinstalled the same
way.
2. Remove honeycomb grid sections from
the outer and/or inner top ducts.
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 rear retainer plates and screws.
Lower Cladding
1. Remove kickplate from kickplate supports.
(See General-UL/NSF I&S Manual.)
2. Remove mounting screws from top and
bottom of lower cladding and remove
lower cladding.
3. After cleaning, replace lower cladding in
reverse order.
Upper Cladding
1. Remove lower cladding, see above.
2. Remove color band, bumper and bumper
retainer from case. (See General-UL/NSF
I&S Manual.)
3. Remove mounting screws from top and
bottom or upper cladding and remove
upper cladding.
4. After cleaning, replace upper cladding and
remaining components in reverse order.

N6F/N6FL
Page 18
December, 2021
GENERAL INFORMATION
NSF Product Thermometer
Installation
1. Unwrap the thermometer and bracket
assembly shipped loose with the case.
2. Position bracket in front left corner of the
left-most bottom tray. Making sure the
bracket is flush with the left edge, use the
bracket holes as a template for where to
drill the holes.
3. Drill two .196” holes in the bottom tray.
NOTE
For ease of installation, position the
washers and capnuts on the top side of
the bracket and bottom tray.
4. Mount the bracket to the bottom tray with
two screws, washers and capnuts.
Night Curtains and Strip “Doors”
Night curtains and strip “doors” are available
from several souces. They promote energy
savings by partially closing off the front of
the case. TYLER does not promote these
products, but accepts that they are used by
some.
Night curtains are to be pulled down each
night. They considerably cut the refrigeration
load during the night by cycling the compres-
sor more frequently. If gas or electric defrost
occurs when the curtains are down, a surplus
of moisture laden air will be trapped in the
refrigerated area, and deposit on product.
For this reason, defrosts must be scheduled
to occur when the case is open.
Plastic strip “doors” are permanently hung
over the face of the case. The ambient air
band is disconnected and plugged during
installation. The refrigeration load reduction
alters the system drastically. The compressor
and suction line become oversized and the
need for defrost time and frequency are
reduced. Follow the suppliers recommenda-
tions for best results.
Case Shelving Information
Case Shelving Limitations
Low temperature multi-shelf cases are
particularly sensitive to air pattern changes.
These changes occur if shelves are not
installed or used properly.
Four full rows of shelving must be used in
this case. The bottom row of shelving must
be no more than 24” above the bottom tray.
Shelving can consist of four rows of 22” wide
shelves or three rows of 22” wide shelves and
one bottom row of 18” wide shelves. Do not
use any other shelving combinations.

Installation & Service Manual N6F/N6FL
February, 2008 Page 19
Shelf Loading
Observe all the LOAD LINE stickers when
stocking the shelves with product.
• Do not let the product spill over or go
beyond these lines.
• Do not let the product cover up or block
any of the air ducts.
CAUTION
Use of large signage can interfere with the
proper air movement in the case.
Improper air movement will alter the case
temperature and could cause product
loss.
SERVICE INSTRUCTIONS
See “General-UL/NSF I&S Manual” for T-8
lamp, canopy ballast, fan blade and motor,
and color band and bumper replacement
instructions.
Ballast and Lighting Locations
The canopy light ballasts are located under
the canopy on the top of the canopy light
channel. The nose light ballasts are under
the upper front cladding. The canopy light(s)
are under the canopy light channel in the top
of the case. The nose light(s) are behind the
bumper retainer/hand rail.

N6F/N6FL
Page 20
December, 2021
Fan Locations
Fan assemblies are located in three locations
in the N6F and N6FL. The primary fans (1)
are located under the bottom trays and
behind the primary condensing coil. The
secondary fans (2) are located on the top
rear of the case in the secondary air band.
The ambient fans (3) are located on the top
front of the case in the ambient air band.
The ambient fans are under the filters.
Checking Air Velocities
NOTE
• Be sure area above the case is clear!
• Conditioned air must circulate above
the case for the ambient air band intake!
• Do not block top ambient air band filter!
Check air velocities with an Alnor, Jr. Model
8100 Velometer with airscoop modification.
Further information on the Velometer can be
obtained from the TYLER Service
Department.
N6F/N6FL case air velocities should be as
follows:
Ambient Air - 360 fpm
Secondary Air - 400 fpm
Primary Air - 600 fpm
Cleaning Honeycomb
The inner honeycomb (primary) should not
require cleaning. The outer honeycomb
(ambient/secondary) will require cleaning.
How often will depend on the amount of dust
and lint in the store air.
Need for cleaning can be determined by
comparing clean honeycomb air velocities
with what velocities are being produced
when they are checked. See page 17 in
this manual for cleaning instructions.
Anti-Sweat Heater Replacement
WARNING
Always shut off electricity to the entire
case before replacing an anti-sweat heater.
Electrical power to wire ends could cause
personal injury and/or death.
NOTE
Anti-sweat heater wires will be still be
attached. Tag and cut wires to remove
front molding.