Start-Up; Maintenance; Manifold Flush System; General Description - Hussmann DSF Installation & Operation Manual

Start-up

Turn on the fan circuit. Check to see if the fan for the
humidity system is running. Remove the right hand bottom
pan (when facing the front of the case), then the TXV cover.
The fan is located up against the right hand side of the
case, as viewed from the front, under the fan plenum (see
diagram). View the blade, and make sure the fan rotation
agrees with the air fl ow arrows. Turn on the water, by turning
the ball valve in the direction of the fl ow (OFF is at 90° to
the direction of fl ow).
After a few minutes, check the spray header by sliding the
honeycomb to the left to expose the discharge tube located
on the right hand side of the case (when viewed from the
rear), by lifting the 4'-0" section of honeycomb with both
ends, until the bottom clears. Pull up and set aside. The
spray header will be exposed. Grasp the header and pull
it loose from the 90° "L" until you see the misting nozzle,
which should be spraying. If not, check the following:
1. Make sure the water is feeding the nozzle.
2. Remove the nozzle, and purge the water.
3. Check strainer at entrance to nozzle.
Reinsert the header into the 90° "L", making sure that the
nozzle is in the center of the pipe when totally inserted,
and the holes in the header are facing the front of the case
at a level angle. The discharge tube can easily be pulled
to service.

Maintenance

• Clean humidity system a minimum of every 90 days
for proper system operation.
SPRAY HEADER
SCOTTDALE NOZZLE
RUNS LENGTH
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OF CASE
REAR INTERIOR WALL OF CASE
VIEWED FROM FRONT
1/4"MPT X 1/4" COMP
PVC ADAPTER
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WATER
SUPPLY
1/4"MPT X 1/4" OD
WATER FILTER
BALL VALVE
COMP ADAPTER
3 STAGE #00015
HAMMON
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HUMIDITY SYSTEM as viewed from the front.
Note: The axial fans included in the humidity system must be
replaced as a unit.
1/4" 100 X 1/8FPT
SW ADAPTER
1/4" OD X 1/8" FPT
SW ADAPTER
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1/8" MPT X 1/4" COMP
PVC ADAPTER
225-01-3059
PAN AND
ACCESS PANEL
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2ND FAN USED
IN 12' CASE

Manifold Flush System

General Description

Twice a day for two (2) minutes, a high pressure water
stream will fl ush most residue build-up from the bottom of
the manifold chamber. This is the area that residue builds
and expands from. Frequency of this periodic maintenance
will vary depending on water mineral content and sanitary
conditions.
Automatic Flush System
Electrical components are located within the electrical
raceway. Electrical components in this area are 115V
AC. Step-down transformer is located in wire-way, and is
controlled by pump switch. Water fl ow for fl ush system is
rated at 0.25 GPM at 60PSI water pressure. Flush nozzle
located in the rear of the case.

Basic System Operation:

1. Filtered water is supplied to the 115V solenoid
valve.
2. At a time of day determined by you, the 115V time
clock will energize the solenoid for 2 minutes.
Start Up:
1. Manually move time clock to initiate a fl ush cycle.
2. Observe that fl ush nozzle is spraying down center of
manifold chamber.
3. Set clock to correct time of day.
4. Set trip pins to the "time of day system is to fl ush"
(NOTE: 2 fl ush/day!)

Manual Flush System

Water valve is located on the outside of the case, in the
rear, on the left hand side as viewed from the rear.
3" AXIAL FAN
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