Carrier TYLER Advantage NLBN, Installation & Service Manual

Page: 12 / 27

NLBR, NLBN, NLBS
Page 12 April, 2007
See “General (UL/NSF) I&S Manual” for
bumper and color band installation and
alignment.
Refrigeration Procedures
Refrigeration system and superheat
instructions can be found in the “General
(UL/NSF) I&S Manual”.
Self-Contained Circuit (NLBS Only)
NLBS cases are self-contained units.
Information pertaining to self-contained units
should be obtained directly from TYLER
Refrigeration.
Electrical Procedures
Electrical Considerations
CAUTION
Make sure all electrical connections at
components and terminal blocks are tight.
This prevents burning of electrical termi-
nals and/or premature component failure.
NOTE
The ballast box is located at the lower left
rear corner of the case. It houses ballasts
and terminal blocks.
Case Fan Circuit (NLBR/NLBS)
This circuit is to be supplied by an uninter-
rupted, protected 120V circuit. The case fan
circuit is not cycled on this case.
Fluorescent Lamp Circuit
NLB(R/N/S) case lighting is supplied by T-8
lights. It is controlled by a light switch in
each case. The standard lighting is 2 rows of
horizontal canopy lights.
Defrost Information
See “General (UL/NSF) I&S Manual” for
operational descriptions for each type of
defrost control.
Defrost Control Chart
NLBR/NLBS Defrost Option Settings
Defrost
Defrost Defrosts Duration Term.
Type Per Day (Min) Temp.
Off Time
6 20 -----
Thermostat bulb is located under the rear
duct, 24” from the right end of the evaporator
coil.
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 pages 13 and 14 show wiring
diagrams for case and lighting circuits.