Reznor REC Series Manuale del proprietario

Form I-REC, P/N 160201 R4, Page 1

Form I-REC (5-16)

Obsoletes Form I-REC (Version A)

Applies to: Model REC EVAPORATIVE

COOLING MODULE

INSTALLATION / OPERATION / MAINTENANCE

Model REC Evaporative Cooling Module

WARNING:Improperinstallation,adjustment,alteration,service,ormaintenance

can cause property damage, injury, or death. Read the installation, operation,

and maintenance instructions thoroughly before installing or servicing this

equipment.

WARNING: Disconnect the power before servicing the cooling module. Failure

to do so can cause electrical shock, personal injury, or death.

CQS

Form I-REC, P/N 160201R4, Page 2

1.0 General 1.1 General Information

Model REC Evaporative Cooling Module is designed as a free standing module with

duct anges for connection upstream from an air moving device. The Model REC

cooling module may be connected to an indirect-red makeup air system, a Model

ADF, ADFH, or RDF direct-red makeup air system, a blower cabinet, or to some other

type of indirect-red system or blower cabinet within the allowable CFM range. Model

REC is not recommended for connection to direct-red makeup air systems other than

Models ADF, ADFH, or RDF.

IMPORTANT: Do NOT connect a Model REC to a blow-through system.

NOTE: This product and these instructions are designed for use in an outdoor installa-

tion. The module may be adapted to an indoor makeup air application.

1.2 Warranty For warranty information, refer to the warranty form included in the

“Owner’s Envelope”.

1.3 Installation

Preparation

Check List

Make certain the installation complies with all local, utility, and national building

and safety regulations and codes.

Check module for shipping damage. If damage is found, document the damage

with the transporting agency and immediately contact your Distributor.

Check base package against parts list below:

Description 40 50 60 70 80 90 180 360

Side Support (2)107227 (4)107227

Front & Rear Support (2)106086 (2)106087 (2)106088 (2)106089 (2)106090 (2)107235 (4)107235

Leg (2 pcs per leg) (8)107236 (16)107236

Duct Connection Angle (1)106095 (1)106096 (1)106097 (1)106098 (1)106099 (1)106100 (1)111501 (2)111501

Hardware: (10 each Sizes 40-180; 20 each Size 360) 1/4-20x3/4” Lg Cap Screw, P/N 16246, and 1/4-20 Hex Nut, P/N 10650

In addition, the following parts for making electrical and water connections may be

shipped in the bottom pan of the evaporative cooling module.

REC Size and

Type of Media

40 50 60 70 80 90 180 360*

lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg

12” (305mm) cellulose 184 83 212 96 237 108 270 122 295 134 318 144 431 195 862 390

12” (305mm) glass ber 201 91 230 104 261 118 296 134 305 138 350 159 514 233 1028 466

* A Size 360 is two separate Size 180 evaporative cooling modules.

Qty P/N Description

1105945 1/4" Hose I.D. x 1/2" N.P.T. Bleed Line Fitting (not used with AquaSaver timed

metering system)

216835 Bushings, Heyco #SR-7W-2

If optional equipment will be eld installed (Moisture Elimination Pads for Size 180

or 360 and/or a Drain and Fill or Freeze Protection Kit for any size), parts will be

shipped separately. Check to be sure that options are available for installation.

If the REC evaporative cooling module is being added to an existing makeup

air system, make certain that the system has sufcient motor capacity for the

increased static pressure. (See Appendix, page 12.)

Make certain the roof (or supporting structure) is capable of handling the additional

load of a cooling module with a full reservoir. (See weights in table.)

1.0 General................................................................. 2

1.1 General Information ........................................2

1.2 Warranty............................................................2

1.3 Installation Preparation Check List ................2

2.0 Dimensions.......................................................... 3

3.0 Mechanical........................................................... 3

3.1 Assembly Instructions.....................................3

3.2 Water Flow Controls and Connections ..........5

5.0 Adjust Water Flow Over Media........................... 8

4.0 Electrical Connections ....................................... 8

6.0 Maintenance and Service ................................... 9

6.1 Media Pads........................................................9

6.2 Water Feed Line & PVC Distribution Piping 10

6.3 Water Pump and Inlet Basket Screen...........10

6.4 Troubleshooting Chart .................................. 11

APPENDIX................................................................ 11

Dimensions - Model REC 360.............................. 11

Cross-Reference Application Chart....................11

Pressure Drop Table - REC Sizes 40-180 ...........12

Index......................................................................... 12

INSTALLATION RECORD ....................................... 12

Table of Contents

Weight of Evaporative

Cooling Module with Wet

Media and Full Reservoir

Form I-REC, P/N 160201 R4, Page 3

2.0 Dimensions

Make certain the roof is level and free of debris where cooling module will be

mounted. Do not mount directly on soft tar roofs where the legs could sink and tilt

the cooler. Provide a level, weather-resistant, solid wood or metal base under the

cooling module support legs.

Make certain that there will be adequate clearance between the bottom of the

reservoir and the roof or platform to allow for drain and overow pipe connections.

FIGURE 1 - Dimensions of Model REC - inches (mm)

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

Size A C D F G

inches mm inches mm inches mm inches mm inches mm

40 28-9/16 725 26-1/2 673 24 610 23-13/16 605 26-1/16 662

50 34-1/16 865 32 813 24 610 29-5/16 745 31-9/16 802

60 39-3/16 995 37-1/2 953 24 610 34-13/16 884 37-1/16 941

70 47-13/16 1214 45-3/4 1162 24 610 43-1/16 1094 45-5/16 1145

80 53-5/16 1354 51-1/4 1302 24 610 48-9/16 1233 50-13/16 1291

90 58-13/16 1494 56-3/4 1441 24 610 54-1/16 1373 56-5/16 1430

180 58-13/16 1494 56-3/4 1441 48 1219 54-1/16 1373 56-5/16 1430

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Length of Transition Duct*

RDF* D

1 & 2 38” (965mm)

3 42” (1067mm)

ADF/ADFH D

300 & 500 24” (610mm)

700 & 1200 30” (762mm)

FIGURE 2 - Minimum Length of Field-Installed Transition Duct - inches (mm)

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Length of Transition

Duct

REC D

40-90 24” (610mm)

180 30” (762mm)

Model REC with

Model RDF* or

ADF/ADFH

*Model RDF with over

17,300 CFM requires

REC 360; see

Appendix, page 11.

Model REC with

Indirect-Fired

Makeup Air

Systems

NOTE: See Appendix,

page 11, for cross-

reference chart.

3.0 Mechanical 3.1 Assembly Instructions

Be sure all preparations have been made. Review Preparation Check List in Paragraph

1.3. Verify that all factory and eld-supplied parts are available.

3.1.1 Base, Cooling Module, and Transition Duct

Assemble Legs - Using four bolts and nuts per leg, fasten two “halves” together. Leg

will have a top and bottom ange. Repeat for all four legs. (See FIGURE 3A.) Adjust

legs to appropriate height and tighten bolts securely.

NOTE: If installing a Size

360 which is two Size 180

modules, refer to FIGURE

17, Appendix, page 11, and

repeat assembly instructions

for both modules.

REC Size

360 is two

separate Size

180 modules -

one with right

side controls

and one

with left side

controls.

Form I-REC, P/N 160201R4, Page 4















FIGURE 3A -

Assembling Base

for Evaporative

Cooling Module

Adjustable Leg Height

16” (406mm) Maximum

9” (229mm) Minimum

FIGURE 3B - Assembled Base for Model

REC Evaporative Cooling Module

3.1.2 Installation

Instructions for

Optional Moisture

Elimination Pad,

Option ASA1 - REC

Size 180 and Size 360

If optional moisture elimination pads are included, they will be factory installed on

Sizes 40-90. On Sizes 180 and 360, the optional moisture elimination pads are

shipped separately for eld installation. Follow these installation instructions. On Size

360, procedure applies to both modules. If not eld installing this option, continue to

Paragraph 3.2.

Media pads must be removed to install the moisture elimination pads. Check the parts

with the list on the left. Follow the instructions in FIGURES 4A, 4B, and 4C to remove

the media, install the moisture elimination pads, and reassemble the unit.

Remove Media Pads (FIGURE 4A)

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 screen retainers from the sides of the media.

Remove the inlet screen from the cooling module.

4) Slide all media pads horizontally away from cooling module until clear of bottom

reservoir pan.

Field Installed Components -

Moisture Elimination Pad

for REC 180 and 360

Qty* P/N Description

2106049 Pad with Frame and

Screen

11 11813 Sheetmetal Screws

4 107248 Catch Pad Clamp

Add the Cooling Module - Carefully lift the pre-

assembled evaporative cooling module from both

ends and place into the center of the base assembly

being sure the airow direction is correct.

Cooling module must be level and all bolts in the

base must be secure.

Transition Duct - Connect the evaporative cooling module to the blower by means

of a eld-supplied transition duct. See FIGURE 2 for minimum length of eld-supplied

ductwork. From a top view, the transition duct must be symmetrical to the evaporative

cooling module. The evaporative cooling module is equipped with duct anges for

connection of ductwork.

Determine Base Location and Attach Rails - Position the four assembled legs in

a rectangular pattern corresponding to the size of the cooling module (FIGURE 1).

Consider minimum length of transition duct (FIGURE 2) when positioning the cooling

module base. Depending on the type of roof, it may be necessary to set the legs on a

weather-resistant, solid wood, or metal base. Module must be level.

Place rail sides on the inside of the top ange of the leg assemblies. Using the bolts

and nuts provided, bolt the side rail to the top three holes located on the legs just

below the top ange. Repeat on the remaining three legs. Tighten nuts securely.

Place the rail ends on the inside of the top ange of the leg assemblies. Bolt the end

rail to the top three holes located on the legs just below the top ange. Repeat on the

remaining three legs. Tighten nuts securely.

3.0 Mechanical

(cont’d)

3.1 Assembly

Instructions

(cont’d)

3.1.1 Base, Cooling Module, and Transition Duct (cont’d)

*Double quantities for Size

360 which is two Size 180

modules.

Form I-REC, P/N 160201 R4, Page 5

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



FIGURE 4A - Removing (and

Re-Installing) Media Pads

Install clamps

on one side

of cooler.

Catch Pad

Mounting Trough

Catch

Pad

Catch

Pad Catch

Pad

Clamp

Step

FIGURE 4B - Install Moisture Elimination Catch

Pads, Option ASA1, on Sizes 180 and 360 (See

parts list, page 4.)

Install Moisture Elimination Pads (FIGURE 4B)

1) Prepare module by attaching two catch pad clamps

to one side of the cooler’s front legs. Screw through

the legs into the clamp with four of the #10 x 1/2”

long sheetmetal screws.

2) Prepare catch pads by assembling them together.

Use three of the #10 x 1/2” long sheetmetal screws.

3) Guide the catch pad assembly through the inlet

of the cooling module and place the bottom of the

lower pad into the catch pad mounting trough.

The screen part of the catch pad assembly should

always be facing the attached air mover. Slip the

catch pad assembly into the two slots located in the

catch pad clamps installed in Step (1).

4) With the pads in place, complete the assembly by

sliding one of the two remaining clamps over the

middle seam where the assembled catch pads

meet. Slip the other clamp over the top catch pad

frame and fasten both clamps to the cooling module

leg using sheetmetal screws.

After completing installation of the moisture elimination

pads as shown in FIGURE 4B, re-install the media pads

removed in FIGURE 4A. Refer to FIGURE 4C before

re-installing media pads.











IMPORTANT: Cooling media is made up of two

different sheets of cooling material. Each has its own

unique angle. When replacing the cooing media, BE

CERTAIN 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.

FIGURE 4C - Airow Direction through the

Media Pads

3.2 Water Flow

Controls and

Connections

3.2.1 Water Flow Controls

Water ow is controlled by either a oat and recirculating pump system or a timed

metering system. Follow the instructions for the type of controls on the evaporative

cooling module being installed. Float and recirculating pump type controls are

identied on the wiring diagram as Option ECD2. AquaSaver timed metering controls

are identied as Option ECD1.

Reverse Steps

in FIGURE 4A to

replace the media.

Media must be

installed with the

airow direction as

shown here.

FIGURE 5 - Re-position

the pump/junction

assembly.

For shipping, pump/

junction box assembly

is attached at the top.

Remove pump/junction

box assembly from

shipping position

(above) and re-attach

in “working” position.

To avoid shipping damage, the

pump/junction box assembly is

attached to the top of the side

panel for shipment. Support

the pump and remove the four

screws that hold the assembly

in position. Re-position the

assembly as shown in FIGURE

5, and attach using the same

screws.

3.2.2 Re-position

Pump Assembly (Opt

ECD2, oat & pump

only.)

Form I-REC, P/N 160201R4, Page 6

3.0 Mechanical

(cont’d)

3.2.3 Inlet Water and Drain Connections

Inlet Water - All Cooling Modules - Install a manual water shutoff upstream of the

inlet, at a convenient non-freezing location, to allow the water supply to be turned on

and off. If necessary, install a bleed line between the manual valve and the cooling

module inlet to allow drainage of the line between the shutoff valve and the cooling

module.

Pump and Float Controls - A oat valve (FIGURE 6) maintains the appropriate water

level in the reservoir. Use a eld-supplied 1/4” diameter tubing with a compression

nut and tubing ferrule to connect the fresh water supply to the inlet of the oat valve.

Place nut and ferrule over tubing and insert tubing into the oat valve stem. Tighten

nut securely.

FIGURE 6 -

Connect

Fresh Water

Supply to Inlet

of the Float

Valve (module

with oat and

recirculating

pump controls)

Use 1/4” tubing for

fresh water supply.

Simulates Side Panel

Float Valve Rod

Field-supplied Compression

Nut and Tubing Ferrule

Outside the Cabinet

WARNING: Water

reservoir (outdoor

systems) must

be drained and

pump motor turned

off when outside

temperature falls

below 32°F (0°C). DO

NOT operate pump

without water in the

reservoir.

FIGURE 7 -

Electrical Box

(cover removed)

and Water

Connection on

Module with

AquaSaver

Controls 1/2” Supply

Line Connection

Microprocessor

Control Location -

AquaSaver System

AquaSaver Timed Metering Control System - If the

cooling module is equipped with a microprocessor

timed metering system, connect a 1/2” water line to

the tting on the side of the cooling module

(FIGURE 7).

Due to various water pressures and installation

conditions, the water supply line may bang abruptly

when the solenoid valve in the system closes. This

banging can be minimized by installing a water

hammer arrestor in the supply line. If installing an

An optional automatic ll and drain kit (Option CT1, CT2, or CT3) will automatically release supply water to the cooling

module when a call for cooling is made and will drain all water from the reservoir when the cooling switch is deactivated

or a cooling thermostat is satised. Fill and drain kits are eld-installed. If installing an optional ll and drain kit, see

FIGURE 9, and follow the instructions that apply. Consult the wiring diagram for electrical connections.

3.2 Water Flow

Controls and

Connections

(cont’d)

Inside

Cabinet

optional water hammer arrestor, select an indoor (above 32°F/0°C) location, either horizontal or vertical, in line with

and as close to the solenoid valve as possible. Follow the manufacturer’s instructions to install and maintain the water

hammer arrestor.

A freeze protection kit is available for a module with a timed control system. It includes a two-way valve and is shipped

separately for eld installation. See FIGURE 9.

Drain and Overow Connections - All cooling modules are equipped with an overow and drain tting. The ttings are

in the cabinet bottom and come complete with a locknut and a sealing gasket. Check these ttings for tightness before

installing the overow and drain piping. The drain and overow tting will accommodate a 3/4” garden hose thread and

is tapped with a 1/2” female pipe thread for iron pipe.

Install bleed

line tting

(tting is

shipped in

the bottom

pan of the

evaporative

cooling

module).

FIGURE 8 - Bleed Line

Fitting (oat and pump

controls)

Bleed Line Connection (pump and oat controls only) – Using the 1/4” I.D.

x 1/2” N.P.T. nylon bleed line tting (shipped in evaporative cooler bottom pan;

see checklist in Paragraph 1.3), thread the tting into the female adapter on the

distribution pipe. The hose barb will protrude from the side of the cabinet (See

FIGURE 8). Attach a eld-supplied 1/4” I.D. hose to the barb and run to the nearest

drain. Discharging a quantity of water by “bleed off” will limit the concentration of

undesirable minerals in the water being circulated through the cooling module.

Minerals build up because evaporation only releases “pure water vapor” causing

the concentration of contaminants in the water to increase as the evaporation

process continues to occur. The minerals accumulate on the media, in the water

lines, on the pump, and in the reservoir.

Adequate bleed off is important to maintaining an efciently operating evaporative

cooling system.

Form I-REC, P/N 160201 R4, Page 7

Sequence of Operation for Optional Kits:

Applies to: Float and Pump System with Optional Fill and Drain Kit

(Option CT1, CT2, or CT3)

1) Call for cooling.

2) 2-way valve is energized and closes Bto A.

3) 3-way valve is energized opening Bto Cand closing Ato C.

4) During no call for cooling, valves return to normal state.

Applies to: AquaSaver Timed Water System with Optional

Freeze Protection (Option CT5)

1) Call for cooling.

2) 3-way valve is energized opening Bto Cand closing Ato C.

3) If outside air temperature drops below freeze protection controller

setting, 3-way valve is de-energized and AquaSaver 24V solenoid valve

remains energized for eight minutes to allow complete system water

drainage.

4) During no call for cooling, 3-way valve returns to normal state.











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

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

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













































 









Water Line Connections (See illustration.):

Supply (3-Way Valve) Connections - Connect the water supply line to “B”

(normally closed). Connect the water drain line to “A” (normally open). Connect

the middle outlet “C” to supply the water to the cooling module reservoir.

Drain (2-Way Valve) Connections - Connect the drain pipe from the

reservoir to “B”. Connect the outlet side to “A” and connect into drain lines

from the cooling reservoir and the supply valve.

Electrical Connections (requires black

and white 14-gauge wire) - Refer to Wiring

Diagram provided with the furnace:

WARNING: Risk of electrical shock.

Disconnect the power.

1. Refer to the wiring diagram for terminal

connections. (NOTE: If kit is not ordered with

the system, connections will not be shown on

the diagram. Terminal connections are specic

to each system. Contact the factory for

terminal connections. Be prepared to provide

all model information.)

2. Run eld-supplied black wire from the

electrical compartment (terminal on the wiring

diagram) of the evaporative cooling module

and connect to the black wire on both the

3-way and the 2-way valve.

3. Run eld-supplied white wire from the

electrical compartment (terminal on the wiring

diagram) of the evaporative cooling module

and connect to the white wire on both the

3-way and the 2-way valve.

NOTE: Follow

instructions

included in the

valve packages

for attaching

valves to the

water line only.

The remainder

of the installation

instructions with

the valves do not

apply to this type

of application.

FIGURE 9 - Water Connections including Optional Fill and

Drain Kit for a Float and Pump Control System and a Freeze

Protection Kit for an AquaSaver Timed Metering System

NOTE: If installing a Size REC360, one ll and drain or freeze protection

kit may be used for both modules if lines are manifolded.

Filling and Adjusting the Water Level in the Reservoir (module equipped with

pump and oat controls only) – Turn on the water supply. Check for a good ow.

When the oat valve (FIGURE 6) shuts off the water supply, measure the water depth.

The depth of the water should be approximately 3”. It may be necessary to adjust the

oat valve to obtain the proper water level or to free the oat valve from obstructions.

To adjust the oat valve, simply bend the oat valve rod upward to raise the water level

or downward to lower he water level.

Check for Water Leaks - All Modules - The reservoir was water tested but should be

checked again for small leaks. If any leaks are present, dry the reservoir and apply a

eld-supplied waterproof silicone sealer around corners and welds.

Proper water ow over the evaporative cooling media is critical to extend the life and

maintain the efciency of the pads.

Form I-REC, P/N 160201R4, Page 8

4.0 Electrical

Connections

All electrical wiring and connections, including electrical grounding, must be made in

accordance with the National Electric Code ANSI/NFPA No. 70 (latest edition) or, in

Canada, with the Canadian Electrical Code, Part I-CSA Standard C22.1. In addition,

compliance must be made with any local ordinances and any electric or gas company

requirements that might apply. Consult with local authorities having jurisdiction to verify

local codes and installation procedures.

The wiring diagrams in FIGURE 10 illustrate the factory-wired connections in the

cooling module junction box. Dashed lines are eld-wired.

Use the two electrical snap bushings provided to protect the tubing-encased wires

when making connections to the eld-supplied air moving equipment.





























































  

Model REC with

AquaSaver Timed

Metering Control

System, Option

ECD1











 























 

























 















 



FIGURE 10 - Wiring

Diagrams for

Evaporative Cooling

Module

WARNING: Adjust ball valve only when power is disconnected

from the unit. Failure to do so can cause electrical shock, personal

injury or death.

Ball

Valve

FIGURE 11 - Disconnect

power; adjust the water

ow with the ball valve.

5.0 Adjust Water

Flow Over

Media

Model REC with

Pump and Float

Control System,

Option ECD2

CAUTION: Do not ood the media pads with extreme quantities of water for long periods as this

will cause premature breakdown of the media. An even ow from top to bottom of the media with

the least amount of water is all that is required to assure maximum efciency and media life span.

More water does NOT provide more evaporation or more cooling.

Float and Pump Control System - Using the ball valve (FIGURE 11), located in the

middle of the length of hose running from the pump to the sprinkler pipe inlet, adjust

the valve handle to allow the ow to completely dampen the media pads from top to

bottom.

Operate the unit watching the water ow. After 15 minutes with the blower in operation,

the water should have completely dampened the pads but should not be owing off the

entering side of the media. If water is owing off the entering side of the media, turn the

system off, disconnect the power, and reduce the entering water ow.

AquaSaver Timed Metering Control System - NOTE: Water ow and pad wetting

time should be adjusted at maximum airow and wet bulb depression to assure

complete wetting of the media at the extreme operating conditions.

In addition to adjusting water ow, the timing of the water on/off cycle can be adjusted.

Adjustments are correct when 1) the water rises from the holes in the sprinkler pipe

(See FIGURE 12A) 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

12B, adjust the water ow depending on the pad height. See FIGURE 12A.

Form I-REC, P/N 160201 R4, 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





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

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 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

   

SML

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 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 2106021 106029

24x2-3/8 1 106022 106030

50 24x12 2106021 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 2107195 107202

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













FIGURE 14 - Removal

and Replacement of

Evaporative Cooling

Media

Form I-REC, P/N 160201R4, Page 10











IMPORTANT: Cooling media is

made up of two different sheets of

cooling material. Each has its own

unique angle. When replacing the

cooling media, BE CERTAIN 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.

FIGURE 15 -

Airow

Direction

through

Media Pad

6.2 Water Feed

Line and PVC

Distribution

Piping

6.3 Water Pump

and Inlet Basket

Screen (oat

and pump control

system)

Instructions for Replacing

Evaporative Cooling Media

Pads

1. Remove the three sheetmetal screws that hold the top pad retainer in

place. Release the top pad retainer from the cooling module.

2. Remove the three sheetmetal screws that hold the bottom pad retainer

in place. Release the bottom pad retainer from the cooling module.

3. Disengage the screen retainers from the sides of the media. Disengage

the inlet screen from the media pads and remove from the cooling

module.

4. Slide all media pads horizontally away from the cooling module until

clear of bottom reservoir pan. Dispose of properly.

5. Replace media by sliding media pads over both support rails until back

stop is encountered. Media MUST be placed with air ow as shown in

FIGURE 15 (left).

6. Center screen on the incoming air side of the media.

7. Replace the two side screen retainers by tting them between the side

of the media pad and the side of the cooling module. The retainers

should t snugly, pinching the screen against the media pads.

8. 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.

9. Replace the top pad retainer by securing the retainer between the pad

and the top of the cooling module. Fasten with the three sheetmetal

screws removed in Step 1.

Annually, the water supply line and the PVC water distribution pipe should be ushed

of debris and contaminants. Remove the media pads following the instructions above.

Remove the water feed line from the downstream side of the ball valve. On a oat and

pump system, unscrew the water bleed line barbed hose tting.

Force a fresh water supply up through the water inlet hose and thoroughly ush the

distribution pipe.

Annually, the pump and inlet screening or basket should be removed, disassembled

and cleaned.

FIGURE 16 - Remove

Junction Box, Pump

and Float Switch as an

Assembly Pump

Motor

Pump with mesh screening over inlet

Float

Switch

Junction Box (Note: Only 208V

unit will have a transformer in

the junction box.)

6.0 Maintenance and Service (cont’d)

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 junction box door and disconnect the two 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 assembled junction box, pump, and oat switch as one

piece.

5. Either remove the screening or dislodge the inlet basket 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.

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