Reznor REC (Evaporative Cooling) Unit Installation Manual - Manual (Page 9)

Form I-REC, P/N 160201 R3, Page 9
FIGURE 12A -
Adjust Water Flow
with the Ball Valve
in FIGURE 12B.
FIGURE 12B -
AquaSaver Water
Line showing
Solenoid Valve
and Ball Valve
Solenoid
Valve
Ball
Valve
A
Sprinkler Pipe
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)
2) AquaSaver Timer Adjustment - At any given tem-
perature, 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 13).
If the jumper is at the appropriate location for the media
(“S” for 24” or “M” for 48”), 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, fol-
low the instructions supplied with the microprocessor to
change the calibration of the “ON” and/or “OFF” cycle.
NOTE: Prior to 2003 the AquaSaver timed cycle was controlled
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 12-14 seconds.
FIGURE 13 -
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
6.0 Maintenance and Service
WARNING:
Disconnect all
power to the unit
before doing any
maintenance. Failure
to do so may cause
electrical shock,
personal injury or
death.
6.1 Media Pads
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 approximately three cooling seasons.
Select the correct replacement part numbers and order replacement media pads from
your Reznor Distributor. Follow the instructions on page 10 to remove and replace
pads as shown in FIGURE 14
REC Media Pad
Size
Qty
Replacement P/N
12” Cellulose 12” Glass Fiber
40
24x12 2 106021 106029
24x2-3/8 1 106022 106030
50
24x12 2 106021 106029
24x7-7/8 1 106023 106031
60
24x12 3 106021 106029
24x1-3/8 1 106024 106032
70
24x12 3 106021 106029
24x9-5/8 1 106025 106033
80
24x12 4 106021 106029
24x2-7/8 1 106026 106034
90
24x12 4 106021 106029
24x8-5/8 1 106027 106035
180
48x12 4 107194 107201
48x8-5/8 1 107195 107202
360
48x12 8 107194 107201
48x8-5/8 2 107195 107202
Media Pads
Screen
Screen Retainer
Top Pad
Retainer
Screw
Bottom Pad
Retainer
FIGURE 14 - Removal
and Replacement of
Evaporative Cooling
Media