Hussmann rl Installation Instruction

1

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483  U.S.A.

Installation Instruction

®

Honeywell Model H409A

Dew Point Control

Honeywell Model H46N-1005i

Humidistat Control

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 sur-
face temperature of the glass
doors above the dew point.

The humidistat control is non-
adjustable, 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 con-
dition where the merchandiser
is located.

All wiring for these controls
must comply with NEC and
local regulations.