Hussmann ESC Installation And Operation Manual page 11

Rev. 0303
HUMIDIFICATION SYSTEM HOOKUPS
Remove the raceway panel on the lower back of the case.
The pre-piped water shut-off valve and the water filter
are located on the left hand side of the case. The water
line (which is a 1/4" OD copper fitting) can be connected
to the ball shut-off valve, by means of a compression fit-
ting (supplied). The line should be one size larger than the
supply line. The line can then be run from one case to
another from within the raceway(s) using Tee connectors.
Before connecting the water to the humidity system, it is
best to purge the line to flush any debris that may clog the
water filter. If the water line requires purging after the
cases are hooked together, it is not necessary to check
each one. Simply shut ball valves to each humidity system,
remove the water line from the last case in the flow, and
purge. By doing this as a precautionary measure, you may
avoid problems and repeat servicing.
START-UP
Turn on the fan circuit. Check to see if the fan for the
humidity system is running. Remove the right hand bot-
tom pan (when facing the front of the case), then the TXV
cover. The fan is located up against the right hand side of
for proper system operation.
REAR INTERIOR WALL OF CASE
VIEWED FROM FRONT
WATER
SUPPLY
1/4"MPT X 1/4" OD
COMP ADAPTER
225-01-1312
HUMIDITY SYSTEM as viewed from the front.
Note: The axial fans included in the humidity system must be replaced as a unit.
Humidity System, cont'd
SPRAY HEADER
SCOTTDALE NOZZLE
RUNS LENGTH
225-01-2089A
OF CASE
1/4"MPT X 1/4" COMP
PVC ADAPTER
225-01-2026
WATER FILTER
BALL VALVE
3 STAGE #00015
HAMMON
225-01-3047
225-01-2026
the case, as viewed from the front, under the fan plenum
(see diagram). View the blade, and make sure the fan rota-
tion agrees with the air flow arrows. Turn on the water, by
turning the ball valve in the direction of the flow (OFF is
at 90° to the direction of flow).
After a few minutes, Check the spray header by removing
the discharge air grill located on the right hand side of the
case (when viewed from the rear), by lifting the 4'-0" sec-
tion of grill by 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.
MAINTENANCE
• Clean humidity system a minimum of every 90 days
1/4" 100 X 1/8FPT
SW ADAPTER
2ND FAN USED
IN 12' CASE
11
1/4" OD X 1/8" FPT
SW ADAPTER
225-01-3059
1/8" MPT X 1/4" COMP
PVC ADAPTER
225-01-3059
PAN AND
ACCESS PANEL
3" AXIAL FAN
225-01-2026