Reznor RBL Option - Installation - Evaporative Cooling Option - Manual (Page 10)

Form I-OPT-EC, Page 10
FIGURE 14 -
Adjust Water
Flow with the
Ball Valve in
FIGURE 13.
FIGURE 15 -
AquaSaver
Microprocessor
Control in the
Junction Box
J2
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
S M L
12-36”
(305-914mm)
Media
Height
37-48”
(940-1219mm)
Media
Height
49-72”
(1245-1829mm)
Media
Height
If the jumper is at the appropriate location for the media, replace the cover. If the jumper
needs to be moved, move it to the appropriate setting. The setting will go into effect when
the power is restored.
Check the "ON" timing; the media pads should be wet from top to bottom during the ON
cycle.
If the preset timing is not suitable for the application, follow the instructions supplied
with the microprocessor to change the calibration of the "On" and/or "Off" cycle.
All Modules - Check the reservoir for any water leaks. The reservoir was water tested, but
if any small leaks are present, drain the reservoir and apply a waterproof silicone sealer
around corners and welds.
NOTE:
Prior to 2003 the AquaSaver timed cycle was con-
trolled by a mechanical timer. Turn the adjustment screw
clockwise to increase the ON time or counterclockwise to
decrease the ON time. One complete turn will adjust the
cycle by 12 to 14 seconds.
Maintenance
10. Media
9. Adjust
Water Flow
Over Pads
(cont’d)
Ball
Valve
FIGURE 13 - Discon-
nect the power and
adjust the water flow
with the ball valve.
Operate the unit watching the water flow. After 15 minutes with the blower in operation,
the water should have completely dampened the pads but should not be flowing off the
entering side of the media. If water is flowing off the entering side of the media, turn the
system off, disconnect the power, and reduce the entering water flow.
AquaSaver Timed Metering Control System -
NOTE: Water flow and pad wetting time
should be adjusted at maximum airflow and wet bulb depression to assure complete wet-
ting of the media at the extreme operating conditions.
In addition to adjusting water flow, the timing of the water on/off cycle can be adjusted.
Adjustments are correct when l) the water rises from the holes in the sprinkler pipe (See
FIGURE 14
) consistently along the entire pipe length, 2) the media pads wet evenly after
a few "ON" cycles (no dry spots or dry streaks), and 3) a slight amount of excess water
collects at the drain at the completion of the "ON" cycle.
1) AquaSaver Water Flow Adjustment
- Using the ball valve illustrated in FIGURE
13
, adjust the water flow depending on the pad height. See FIGURE 14.
A
Sprinkler Pipe
2) AquaSaver Timer Adjustment -
At any given temperature, the media pads should
completely wet from top to bottom during the ON cycle. The microprocessor has three
preset timing settings based on media size. The appropriate setting is selected by
changing the position of the suitcase jumper at J2 on the microprocessor. Remove the
cover and check the setting (See FIGURE 15).
Pad Height
A = Water rise from PVC
Sprinkler Pipe
24" (610mm) 1/8" to 1/2" (3 to 13mm)
48" (1219mm) 1/4" to 1/2" (6 to 13mm)
Media
- Over time, excessive amounts of mineral deposits will begin to build up on the
media. Annually, scale and dirt should be washed off the entering surface of the media.
Remove the pad retainers and screen. Clean the media using a garden hose, mild soap, and
a soft bristled brush. When the media becomes too clogged with mineral deposits and dirt
that it cannot be cleaned, the pads should be replaced. The average pad life is approxi-
mately three cooling seasons.