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NFNX, NCNX, NFGNX,
NCNGX
Defrost Information
See "General-UL/NSF I&S Manual" for oper-
ational descriptions for each type of defrost
control.
Defrost Control Chart
NFNX/NCNX/NFNGX/NCNGX
Defrost
Defrosts
Type
Per Day
Electric/FF
1
Electric/IC
1
Electric/MED 1
Gas/FF
2-3
Gas/IC
1
Gas/MED
2-3
E = Electric Defrost Termination
F/S = Electric Defrost Failsafe (Opt.)
G = Gas Defrost Fan Delay (Dual Temp)
A/S = Glass Anti-Sweat (Dual Temp)
Most klixons are located on the end of the
evaporator coil. The diagram shows the
location for each defrost type that uses a
klixon.
Page 8
Defrost
Duration
Term.
(Min)
Temp.
60
50°F
36
50°F
36
50°F
20-25
55°F
25-30
55°F
16-20
55°F
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 12 will cover the NFN(G)X/NCN(G)X
case circuits and dual temp circuits with
electric and hot gas defrost options.
November, 2007
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