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HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Dew Point and
Humidistat Control
for Reach-In Merchandisers
Installation Instruction
Merchandisers
®
Model Description
Honeywell Model H409A Dew Point Control
Honeywell Model H46N-1005i Humidistat Control
GENERAL INFORMATION
Kit Application
Both of the controls shown on
Page 12 are designed for energy
conservation. They supply
power to the anti-condensate
heaters in the door only when
necessary to maintain the surface temperature of the glass
doors above the dew point.
The humidistat control is nonadjustable, factory-set to cycle
off the door anti-condensate
heaters when the store humidity
drops to the set point of 35%
relative humidity or lower. This
control carries a maximum load
of 10 Amps (see Table 1,
Amperage).
The dew point control is a
more versatile control offering
six adjustable set-points, with
a maximum setting of 40%
relative humidity. This control
carries maximum load of
16 Amps (see Table 1,
Amperage).
The capacity of these controls
may be increased by using
relays whose coils are wired
parallel with the control and the
relay contacts connected to
power supply. Refer to wiring
diagrams for detail.
For a line-up of cases, one case
is designated as the master case
with the control installed. Note
that each narrow island side is
wired separately.
All other cases in the line-up
are designated as slave cases
with a relay energized from the
control on the master case (side
of an island).
The location of either dew
point control or humidistat
control must be in an area that
reflects the store ambient condition where the merchandiser
is located.
All wiring for these controls
must comply with NEC and
local regulations.
P/N 0387094A
April, 2002
P/N 0387094A
Merchandisers
®
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HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Table 1
Door heater amperages cycable by dew point or humidistat control (120 V).
Model
Door Condensate Heater Amps
Anthony Innovator
RL2, RLN2, RLNI2* 2.18 1.5
RL3, RLN3, RLNI3* 3.27 2.31
RL4, RLN4, RLNI4* 4.36 3.08
RL5, RLN5, RLNI5* 5.45 3.86
*RLNI values are per side.
Control Location — Reach-in and Narrow Reach-in
Skid/External Base
Electrical Wireway
Front
5-Door Shown
Relay & Terminal Block Location
Bottom Front
Support
Refrigeration Outlet
Dew Point/
Humidistat
Location
Electrical
Field Wiring
Connection Point
Control Locations — Narrow Island Reach-in
Rear Relay & Terminal Block Location
Electrical Wireway
Refrigeration Outlet
Dew Point/
Humidistat
Location
Skid/External Base
Electrical Wireway
Front
5-Door Shown
Front Relay & Terminal Block Location
Bottom Front
Support
Dew Point/
Humidistat
Location
Refrigeration Outlet
Electrical
Field Wiring
Connection Point
Dew Point and Humidistat Control
Installation Instruction
P/N 0387094A
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HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Lower Right Hand of Case
R
B
W
Color Coded Harness
Identification
Tag
Upper Right Hand of Case
Red
Black
White
Honeywell Dew Point Control
M/N409A or
Honeywell Humidistat Control
M/NH46N
COMPONENT LOCATION FOR DEW POINT / HUMIDISTAT CONTROL
P/N 0387094A
Merchandisers
®
4
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Notes:
➀ Dew point or Humidistat
Anti-sweat control.
➁ White wire not used on
Humidistat control.
➂ Field wiring for slave case
relay coil(s).
• Yellow terminals 1 through 8
are 208V Defrost Circuit.
• Terminals 1 through 3 are
internally jumpered.
• Terminals 4 and 5 are
internally jumpered.
• Terminals 6 through 8 are
internally jumpered.
• Gray terminals 10 through 17
are 120V Power.
• Terminals 14 and 16 are
internally jumpered.
• Terminals 10 and 11 are
jumpered with a removable
push-in jumper.
• Terminals 13 and 14 are
jumpered with a removable
push-in jumper.
• Blue terminals 20 through 26
are 120V Neutral
• Terminals 24 through 26 are
internally jumpered.
• Terminals 21 through 24 are
jumpered with a removable
push-in jumper.
Kits FL28 and FL29
Diagrams 0423658 and 0423689
RL Wiring Diagram for Dew Point or Humidistat Control
Fans and Anti-Condensate Heaters on Common Power Circuit.
Only Cycles Door Anti-Condensate Heater.
(Electric Defrost)
Rear Defrost
Front Defrost
Fans
Fan Relay
COM
COM
N.C.
N.O.
N.C.
N.O.
208V
Anti-Sweat
Relay
120V
Rod Heater (Drain)
Frame Anti-Sweat
Door Anti-Sweat
Lights
L
Switch
Thermostats
Defrost Limit
The heavy lines drawn inside
the terminal blocks represent
permanent internal jumpers.
The heavy bracketed lines drawn outside
the terminal blocks represent removable
external push-in jumpers.
1234567810111213141617202122242526
Defrost Heaters (208V)
Defrost Heaters (208V)
Lights (120V)
Lights (Neutral)
B
1
2
Fans & Anti-Sweat (120V)
R
W
O.O.R .
Relay Control
C.O.R.
Defrost Termination
C.O.R.
Fans & Anti-Sweat (Neutral)
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