Reznor XE Unit Installation Manual - Manual (Page 36)

Form I-XE/CRGB/RPB, P/N 131782 Rev 5, Page 35
Instructions for Replacing Media Pads
1. Remove the three sheetmetal screws that hold the top pad retainer.
Release the top pad retainer from the cooling module.
2. Remove the three sheetmetal screws that hold the bottom pad
retainer. Release the bottom pad retainer from the cooling module.
3. Disengage the inlet screen from media pads and remove.
4. Slide all media pads horizontally away from the cooling module
until clear of bottom reservoir pan. Dispose of properly.
5. Slide media pads over both support rails until back stop is
encountered. Media must be placed as shown in FIGURE 39.
6. Center screen on the incoming air side of the media.
7. Replace the bottom pad retainer by securing the retainer between
the pad and the reservoir pan. Fasten with the three sheetmetal
screws removed in Step 2.
8. Replace the top pad retainer by securing the retainer between the
pad and top of the cooling module. Fasten with the three
sheetmetal screws removed in Step 1.
Pad
Screen
Pad
Retainer
Screw
FIGURE 38 - Removal and
Replacement of Evaporative
Cooling Module Media
45°
Airflow
to Space
Outside
Airflow
FIGURE 39 - Media must
be installed with 45°
angle sloping downward
toward the incoming
outside air.
IMPORTANT: The media is
made up of two different sheets
of cooling material. Each sheet
has its own unique angle. When
replacing the cooling media, BE
CERTAIN that the 45° angle slopes downward toward the
incoming outside air. If the media is not installed properly,
water blowoff from the media pads will occur.
Pump
Junction Box (Note: Only
208V unit will have a trans-
former in the junction box.)
Float
Switch
Pump Motor
To clean the pump, carefully remove both
the screeb ir basket and the snap-on cover
plate.
FIGURE 40 - Remove Junction Box, Pump and Float Switch
as an Assembly (NOTE: Actual assembly may not appear
exactly as in the photo. Applies to evaporative cooling
module with float and pump control system only.)
Water Feed and Distribution Line - Annually, the water supply line
and the water distribution line (either PVC pipe or water sock) should
be flushed of debris and contaminants.
1. Remove the media pads.
2. Remove the water feed line from the downstream side of the ball
valve and unscrew the water bleed line barbed hose fitting.
3. Force a fresh water supply through the water inlet hose and
thoroughly flush the distribution line.
4. Reassemble being careful to install media with air flow direction as
shown in FIGURE 39.
Water Pump and Inlet Basket Screen (Does not apply to module
with optional timed metering system.) - Annually, the pump and inlet
basket screen should be removed, disassembled, and cleaned.
WARNING: Do not expose pump motor or any part
of the electrical box to water. Evaporative cooling
pump is NOT submersible.
1. Disconnect the power supply to the unit.
2. Remove the service panel and the junction box door. Disconnect
the two-line voltage power supply wires from the terminal block
inside the junction box.
3. Disconnect the water feed line hose from the upstream side of the
ball valve.
4. Unscrew the four sheetmetal screws holding the junction box to
the cooling module. Remove the junction box-pump-float switch
assembly (See FIGURE 40).
5. Dislodge the inlet basket screen from the pump and clean any
buildup of debris and dirt. Carefully remove the base cover plate
from the bottom of the pump. Using a mild soap solution, wash all
deposits from the inside of the pump and remove all debris from
the impeller.
6. Reassemble the pump. Replace the parts in exact reverse order,
being careful that everything is returned to its proper position.
34. Optional Dampers and Controls
(See Wiring Diagram supplied with
unit.)
NOTE: Damper controls are illustrated in FIGURE 41A and 41C.
These illustrations are intended to show location only of various air
control accessories and do not represent suggested combinations of
accessories.
M edia Pad Replacement Part No. (each)
Sizes
Qt
y
Cellulose Fiber Glass Fiber
(inches) 6" 12" 6" 12"
75,100, 24 x 12 2 105985 106021 106037 106029
125 24 x 2-3/8 1 105986 106022 106038 106030
150, 24 x 12 2 105985 106021 106037 106029
175 24 x 7-7/8 1 105987 106023 106039 106031
200, 24 x 12 3 105985 106021 106037 106029
225 24 x 1-3/8 1 105988 106024 106040 106032
250, 24 x 12 3 105985 106021 106037 106029
300 24 x 9-5/8 1 105989 106025 106041 106033
350 24 x 12 4 105985 106021 106037 106029
24 x 2-7/8 1 105990 106026 106042 106034
400 24 x 12 4 105985 106021 106037 106029
24 x 8-5/8 1 105991 106027 106043 106035
Furnace
Size