Greenheck TSU Base Unit User Manual

Document 464441

Model TSU

Make-Up Air Unit

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage!

General Safety Information

Only qualiﬁed personnel should install this unit. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity are present. If more information is needed, contact a licensed professional engineer before moving forward.

1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC), the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electrical Code (CEC) in Canada.

2. The rotation of the wheel is critical. It must be free to rotate without striking or rubbing any stationary objects.

3. Motor must be securely and adequately grounded.

4. Do not spin fan wheel faster than the maximum cataloged fan rpm. Adjustments to fan speed signiﬁcantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.

5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces, or chemicals. Replace cord immediately if damaged.

6. Verify that the power source is compatible with the equipment.

7. Never open blower access doors while the fan is running.

DANGER

Always disconnect power before working on or near a unit. Lock and tag the disconnect switch or breaker to prevent accidental power up.

CAUTION

When servicing the unit, motor may be hot enough to cause pain or injury. Allow motor to cool before servicing.

FOR YOUR SAFETY

If you smell gas:

1. Open windows.

2. Do not touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier.

FOR YOUR SAFETY

The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous.

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.

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Receiving

Upon receiving the product, check to ensure all items are accounted for by referencing the delivery receipt or bill of lading. Inspect each crate or carton for shipping damage before accepting delivery. Alert the carrier of any damage detected. The customer will make a notation of damage (or shortage of items) on the delivery receipt and all copies of the bill of lading which is countersigned by the delivering carrier. If damaged, immediately contact your Greenheck Representative. Any physical damage to the unit after acceptance is not the responsibility of manufacturer.

Unpacking

Verify that all required parts and the correct quantity of each item have been received. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space. Conﬁrmation of shipment(s) must be limited to only items on the bill of lading.

Handling

Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used. Location of brackets varies by model and size. Handle in such a manner as to keep from scratching or chipping the coating. Damaged ﬁnish may reduce ability of unit to resist corrosion.

Storage

Units are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the unit and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user.

INDOOR — The ideal environment for the storage of

units and accessories is indoors, above grade, in a low humidity atmosphere which is sealed to prevent the entry of blowing dust, rain, or snow. Temperatures should be evenly maintained between 30°F 110°F (43°C) (wide temperature swings may cause condensation and “sweating” of metal parts). All accessories must be stored indoors in a clean, dry atmosphere.

Remove any accumulations of dirt, water, ice, or snow and wipe dry before moving to indoor storage. To avoid “sweating” of metal parts allow cold parts to reach room temperature. To dry parts and packages use a portable electric heater to get rid of any moisture build up. Leave coverings loose to permit air circulation and to allow for periodic inspection.

(-1°C) and

The unit should be stored at least 3½ in. (89 mm) off the ﬂoor on wooden blocks covered with moisture proof paper or polyethylene sheathing. Aisles between parts and along all walls should be provided to permit air circulation and space for inspection.

OUTDOOR — Units designed for outdoor applications

may be stored outdoors, if absolutely necessary. Roads or aisles for portable cranes and hauling equipment are needed.

The fan should be placed on a level surface to prevent water from leaking into the unit. The unit should be elevated on an adequate number of wooden blocks so that it is above water and snow levels and has enough blocking to prevent it from settling into soft ground. Locate parts far enough apart to permit air circulation, sunlight, and space for periodic inspection. To minimize water accumulation, place all unit parts on blocking supports so that rain water will run off.

Do not cover parts with plastic ﬁlm or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles.

Inspection and Maintenance during Storage

While in storage, inspect fans once per month. Keep a record of inspection and maintenance performed.

If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rotate the fan wheel by hand ten to ﬁfteen revolutions to distribute lubricant on motor. Every three months, the fan motor should be energized. If paint deterioration begins, consideration should be given to touch-up or repainting. Fans with special coatings may require special techniques for touch-up or repair.

Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface with crocus cloth or ﬁne emery paper and oil. Do not destroy the continuity of the surfaces. Wipe thoroughly clean with Tectyl® 506 (Ashland Inc.) or the equivalent. For hard to reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive or WD40

® or the equivalent.

REMOVING FROM STORAGE — As units are removed

from storage to be installed in their ﬁnal location, they should be protected and maintained in a similar fashion, until the equipment goes into operation.

Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.

1. Check all fasteners, set screws on the fan, wheel, bearings, drive, motor base, and accessories for tightness.

2. Rotate the fan wheel(s) by hand and assure no parts are rubbing.

Make-Up Air Unit2

Table of Contents

Installation – Slab Mounted Unit

Installation

Slab Mounted Unit ......................... 3

Rail Mounted Unit ......................... 4

Curb Mounted Unit ........................ 4

Filter Section and Weatherhood .............. 5

Evaporative Cooling Module (optional) ......... 5

Electrical Wiring ........................... 6

Direct Gas Piping .........................7-8

Optional Evaporative Cooler Piping ...........8-9

Optional Water Wizard™ ................... 10

Optional Building Pressure Control ........... 11

Optional Dirty Filter Switch ................. 11

Start-Up

Blower ................................. 12

Direct Gas ............................13-15

Optional Evaporative Cooling Recirculating .... 16

Optional Water Wizard™ .................17-18

Operation

Optional Water Wizard™ ................... 18

Optional VAV Units ........................ 19

Optional Recirculating Units ................ 20

Electrical ................................ 21

Troubleshooting

Blower ................................. 22

Motor Overamps ......................... 23

Insufficient / Too Much Airflow .............. 24

Excessive Noise or Vibration ................ 25

Heater ................................26-28

Optional Evaporative Cooling ............... 29

Optional Water Wizard™ ................... 30

Maintenance

Routine ...............................30-32

Fall .................................... 32

Reference

Gas Train Layouts ........................ 33

Control Center Layout .................... 34

Start-Up Check List ....................... 35

Maintenance Log ...................Backcover

Our Commitment ...................Backcover

1. Pour Concrete Slab

Pour the concrete slab. The slab should be one foot larger than the unit on all sides. The slab should be at least four inches thick and poured on a bed of gravel to ensure proper drainage. Allow the concrete slab to properly cure before installing the unit.

2. Install Unit

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the concrete slab. Fasten the unit to the slab through the factoryprovided lifting lugs.

NOTE

The use of all lifting lugs and a set of spreader bars in mandatory when lifting the unit.

NOTE

For easy installation, it is recommended that the weatherhood, filter section or evaporative cooler be installed after the base unit.

3. Attach Ductwork

Refer to the CAPS submittal for the duct size and location. Manufacturer recommends attaching ductwork using a rubber duct section at the unit to reduce vibration. An appropriate sealant should be used around the discharge opening of the unit to create a weathertight seal.

Good duct practices should be followed for all ductwork. Ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA 96 and any local codes.

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Installation – Rail Mounted Unit

Installation – Curb Mounted Unit

1. Install Rails

Install the rails. The rails should be located

Rails extend 6 inches

Rails extend 6 inches from discharge end

from discharge end of unit

of unit

Rails located 6 to 12 inches

Rails located 6 to 12 inches in from sides of unit.

in from sides of unit.

6 to 12 inches in from the sides of the unit. The rails should extend at least six inches past the intake

Rails extend

Rails extend 6 inches from

6 inches from end of ﬁlter section

end of ﬁlter section

and discharge ends of the unit. Rails are ﬁeld-supplied by others

Spreader Bar

and are not supplied by manufacturer.

2. Install Unit

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the rails.

NOTE

The use of all lifting lugs and a set of spreader bars in mandatory when lifting the unit.

NOTE

For easy installation, it is recommended that the weatherhood, filter section or evaporative cooler be installed after the base unit.

3. Attach Ductwork

Good duct practices should be followed for all ductwork. Ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA 96 and any local codes.

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1. Install Curb

Position curb on the roof (refer to the CAPS submittal section for placement of curb in relation to the unit). Verify that the curb is level, shim if necessary. Attach curb to roof and ﬂash into place.

2. Install Ductwork

If the unit has a downblast (DB) discharge, install the supply air duct now.

If the unit requires a return air duct, install it now.

If the unit has a horizontal (HZ) discharge, wait until the base unit is installed before installing the supply duct.

Good duct practices should be followed for all ductwork. All ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA96 and all local codes. Refer to the CAPS submittal for the ductwork sizes.

NOTE

The use of a duct adapter is recommended on a downblast (DB) arrangement to align the ductwork with the supply unit and is only a guide and is not to be used as ductwork support.

3. Apply Sealant

Sealant

Apply an appropriate sealant around the perimeter of the curb and duct adapter(s) to isolate fan vibration and prevent

Spreader Bar

water penetration.

4. Install Unit

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the curb.

NOTE

The use of all lifting lugs and a set of spreader bars in mandatory when lifting the unit.

For easy installation, it is recommended that the weatherhood, filter section or evaporative cooler be installed after the base unit.

5. Install Ductwork

If the unit has a downblast (DB) discharge, the ductwork should already be installed.

Good duct practices should be followed for all ductwork. Ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA 96 and any local codes.

Metal Cover

Equipment Support

Installation – Filter Section and Weatherhood

Installation of Evaporative Cooling Module (optional)

NOTE

Installation instructions for the filter section and weatherhood apply only to non-evaporative cooling units. For evaporative cooling units, skip to the evaporative cooler installation instructions.

1. Apply Sealant

Apply an appropriate sealant around the intake end of the

Sealant

base unit to create a weathertight seal.

NOTE

The use of all lifting lugs and a set of spreader bars is mandatory when lifting the weatherhood.

2. Install Filter Section

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the ﬁlter section on the intake end of the base unit. The ﬂange along the

Sealant

top of the ﬁlter section should overlap the ﬂange along the top of the base unit.

Use self-tapping sheet metal screws to fasten the ﬁlter section to the base unit across the top and down the sides.

If ﬁlters are not installed in the ﬁlter section, install them now. Airﬂow arrows are located on the ﬁlters to ensure proper installation.

3. Apply Sealant

Apply an appropriate sealant around the intake end of the ﬁlter section to create a weathertight seal.

4. Install Weatherhood

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the assembled weatherhood on the intake end of the base unit. The ﬂange along the top of the weatherhood should overlap the ﬂange along the top of the ﬁlter section.

Use self-tapping sheet metal screws to fasten the weatherhood to the ﬁlter section across the top and down the sides.

NOTE

Small evaporative coolers ship attached to the base unit and require no additional mounting.

1. Equipment Support(s) - consult factory

Position equipment support(s) on the roof (reference the CAPS submittal for placement of equipment support(s) in relation to the unit). Verify that all unit supports are level, shim if

Equipment Support

necessary. Attach equipment support to the roof, remove metal cover, ﬂash to wooden nailer and reinstall cover.

Sealant

2. Apply Sealant

Apply an appropriate sealant around the airstream opening to create an airtight seal.

Sealant

NOTE

The use of all lifting lugs and a set of spreader bars is mandatory when lifting the evaporative cooling module.

3. Set Evaporative Cooling Module

Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the module on the equipment support(s). The ﬂange on the evaporative cooler should overlap the ﬂange on the unit.

4. Secure Cooling Module to Unit

Use self-tapping screws to fasten the cooling module to the base unit along the top and down both sides. Fasten at the top through the ﬂanges.

NOTE

When mounting the evaporative cooler, it is important that it is level to ensure proper operation and water drainage.

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Installation of Electrical Wiring

IMPORTANT

Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached on the inside of the control center door(s).

IMPORTANT

All wiring should be done in accordance with the latest edition of the National Electric Code ANSI/ NFPA70 and any local codes that may apply. In Canada, wiring should be done in accordance with the Canadian Electrical Code.

IMPORTANT

The equipment must be properly grounded. Any high voltage wiring running through the unit in the airstream must be protected by metal conduit, metal clad cable or raceways.

CAUTION

If replacement wire is required, it must have a temperature rating of at least 105ºC, except for an energy cut-off or sensor lead wire which must be rated to 150ºC.

DANGER

High voltage electrical input is needed for this equipment. This work should be performed by a qualified electrician.

CAUTION

Any wiring deviations may result in personal injury or property damage. Manufacturer is not responsible for any damage to, or failure of the unit caused by incorrect final wiring.

IMPORTANT

Manufacturer’s standard control voltage is 24VAC. Control wire resistance should not exceed 0.75ohms (approximately 285 feet total length for 14gauge wire; 455 feet total length for 12gauge wire). If the resistance exceeds 0.75 ohms, an industrial-style plug-in relay should be wired in place of the remote switch. The relay must be rated for at least 5 amps and have a 24 VAC coil. Failure to comply with these guidelines may cause motor starters to chatter or not pull in, resulting in contactor failures and/or motor failures.

1. Determine the Size of the Main Power Lines

The unit’s nameplate states the voltage and the unit’s MCA. The main power lines to the unit should be sized accordingly. The nameplate is located on the outside of the unit on the control panel side.

Voltage, Hertz, Phase

MODEL

VOLTS

AMPS

SUP HP

MARK

Electrical Nameplate

HZ PH

S/N

EXH HP

2. Provide the Opening(s) for the Electrical

Connections

Electrical openings vary by unit size and arrangement and are ﬁeld-supplied.

3. Connect the Main Power

Connect the main power lines to the disconnect switch and main grounding lug(s).

4. Wire the Optional Convenience Outlet

The convenience outlet requires a separate 115V power supply circuit. The circuit must include short circuit protection which may need to be supplied by others.

5. Wire the Optional Accessories

Reference the Ladder Diagram on the inside of the control center door for correct wiring of the following optional accessories:

• Selectra Stat

• Room Override

• Blower Switch

• Heat Switch

• Indicating Lights

• Dirty Filter Indicator

• TSCP

• KSCP

NOTE

Wiring to the Selectra Stat should be in separate conduit or run with shielded cable.

NOTE

TSCP has number-to-number wiring.

NOTE

Large evaporative coolers may require a separate power supply.

6. Wire the Optional Evaporative Cooler

Reference the Ladder Diagram on the inside of the control center door for correct wiring of the pump and the optional auto-drain and ﬂush.

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Installation of Direct Gas Piping

IMPORTANT

All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code ANSI/Z223.1 and any local codes that may apply. In Canada, the equipment shall be installed in accordance with the Installation Code for Gas Burning Appliances and Equipment (CGA B149) and Provincial Regulations for the class. Authorities having jurisdiction should be consulted before installations are made.

WARNING

All components of this or any other gas-fired heating unit must be leak tested prior to placing the unit into operation. A soap and water solution should be used to perform this test. NEVER test for gas leaks with an open flame.

WARNING

When leak testing pressures that are equal to or less than 14in.wc (3.5kPa), first close the field-installed shutoff valve to isolate the unit from the gas supply line.

WARNING

When leak testing pressures that are above 14 in.wc (3.5kPa), close the field-installed shutoff valve, disconnect the furnace and gas train from the gas supply line and plug the supply line before testing.

IMPORTANT

All piping should be clean and free of any foreign matter. Foreign material entering the gas train can damage the valves, regulators and burner.

IMPORTANT

Do NOT connect the unit to gas types other than what is specified and do NOT connect the unit to gas pressures that are outside of the pressure range shown on the label.

NOTE

When connecting the gas supply, the length of the run must be considered in determining the pipe size to avoid excessive pressure drop. Refer to a Gas Engineer’s Handbook for gas pipe capacities.

1. Determine the Supply Gas Requirements

The unit’s direct gas nameplate states the requirements for the gas being supplied to the unit. The direct gas nameplate is located on the outside of the unit on the control center side.

Minimum gas pressure for

maximum output

MAX BTU/HR BTU/H MAX

NORMAL MANIFOLD PRESSURE PRESSION DÕADMISSION NORMALE

MIN GAS PRESSURE PRESSION DE GAZ

MIN BURNER PRESSURE DROP PERTE MIN DE PRESSION DANS LE BRULEUR

TYPE OF GAS NATURE DU GAZ

EQUIPPED FOR

CONCU POUR

Type of gas

AGAINST

SCFM

CONTE

Direct Gas Nameplate

“ W.C.

MIN BTU/HR BTU/H MIN

MIN GAS PRESSURE FOR MAX OUTPUT PRESSION DE GAZ MIN POUR PUISSANCE MAX

MAX GAS PRESSURE PRESSION DE GAZ MAX

MAX BURNER PRESSURE DROP PERTE MAX DE PRESSION DANS LE BRULEUR

DESIGN ΔT ΔT NORMALE

EXTERNAL STATIC PRESSURE

“ W.C.

PRESSION STATIQUE EXTERIEURE

Maximum gas pressure

“ W.C.

PSI

2. Install Additional Regulator if Required

When the supply gas pressure exceeds the maximum gas pressure shown on the direct gas nameplate, an additional regulator is required to reduce the pressure. The regulator must have a listed leak limiting device or it must be vented to the outdoors.

NOTE

The regulator located inside the unit is used to adjust the unit’s maximum output temperature.

3. Connect the Supply Gas Line

A manual shut off valve (gas cock), 1/8 in. plugged test port and 6 in. drip leg must be installed prior to the gas train. The valve and the test port must be accessible for the connection of a test gauge. Supply gas connections must be made by a qualiﬁed installer and are not furnished by manufacturer.

Gas Cock

From

Gas

Supply

1/8 in. Plugged Tap

Ground Joint Union

6 in. Trap

Controls

Supply Gas Line

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4. Pipe the Optional Vent Line

If an optional vent line is located between the safety shutoff valves, it must be piped to the outdoors.

WARNING

Reference the National Fuel Gas Code for additional vent line requirements.

Vent Line Solenoid

to outdoors

Vent Line

Installation Evaporative Cooler Piping (optional)

Evaporative Cooling with Recirculating Pump

Supply Line

Drain Line Valve

Drain Line

Supply Line Valve

Overﬂow

to burner

Safety Shut-Off Valves

Optional Vent Line

from supply

5. Test the System for Leaks

Check both the supply lines and the factory piping for leaks. Apply a soap and water solution or other approved leak test solution to all piping and watch for bubbling which indicates a leak.

WARNING

NEVER test for a gas leak with an open flame.

NOTE

The factory piping has been checked for leaks, but should be rechecked due to shipping and installation.

Trap

Recirculating Evaporative Piping

IMPORTANT

All supply solenoids, valves and all traps must be below the roof line or be otherwise protected from freezing.

IMPORTANT

The supply line should be of adequate size and pressure to resupply the amount of water lost due to bleed-off and evaporation. The drain line should be the same size or larger than the supply line.

CAUTION

Provisions must be taken to prevent damage to the evaporative cooling section during freezing conditions. The sump, drain lines and supply lines must be drained prior to freezing conditions or an alternate method must be used to protect the lines and media.

1. Install the Water Supply Line

2. Install the Drain Line

Connect an unobstructed drain line to the drain and overﬂow connections on the evaporative cooler. A shut off valve (by others) is required for the evaporative cooler drain line.

A trap should be used to prevent water from overﬂowing the sump pump. Refer to drain

Drain

Trap

6 in. min.

trap diagram.

3. Check/Adjust Water Level

Check the water level in the sump tank. The water level should be above the pump intake and below the overﬂow. Adjust the ﬂoat and drain pipe as needed to achieve the proper water level.

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Installation Evaporative Cooler Piping (optional)

Evaporative Cooling with Auto Drain and Fill

VALVE C

Sump Drain Solenoid

(normally open)

VALVE B

Supply Line Drain Solenoid

(normally open)

Auto Drain and Fill Evaporative Piping

The supply line should be of adequate size and pressure to resupply the amount of water lost due to bleed-off and evaporation. The drain line should be the same size or larger than the supply line.

All solenoid valves and traps must be installed below the roof to protect the supply water line from freezing. If they cannot be installed below the roof, an alternative method must be used to protect the lines from freezing.

The supply solenoid (Valve A) is NOT the same as the drain solenoids (Valve B and Valve C). Make sure to use the proper solenoid for each location. Check your local code requirements for proper installation of this type of system.

continued

Supply Line

Sump Overﬂow

Sump Drain

IMPORTANT

CAUTION

IMPORTANT

VALVE A

Supply Solenoid

(normally closed)

Trap

Drain Line

1. Install the Water Supply Line

Supply line opening requirements vary by unit size and arrangement and are ﬁeld-supplied. Connect the water supply line to the ﬂoat valve through the supply line opening in the evaporative cooling unit. Install the 1/2 in. normally closed solenoid (Valve A) in the supply line. Install the 1/4 in. normally open solenoid (ValveB) between the supply line and the drain line. Refer to Auto Drain and Fill Evaporative Piping drawing shown on this page.

2. Install the Drain Line

Connect an unobstructed drain line to the sump drain overﬂow connection. Install the 3/4 in. normally open solenoid (Valve C) between the sump drain connection and the drain line.

A trap should be used to prevent water from overﬂowing the sump pump. Refer to

Drain

Trap

6 in. min.

drain trap diagram.

3. Check/Adjust Water Level

Check the water level in the sump tank. The water level should be above the pump intake and below the overﬂow. Adjust the ﬂoat and drain pipe as needed to achieve the proper water level.

Auto Drain & Flush Valves

(when provided by Manufacturer)

Assm.

Number

852178

Part numbers subject to change.

Mfg. Part

Number

461262 8210G2 Supply Closed

461263 8262G262

461264 8210G35

ASCO

Part Num-

ber

Solenoid

Type

Supply

Line

Drain

Sump

Drain

De-Energized

Position

Open

Diameter Qty.

1/2 inch

(12.7 mm)

1/4 inch

(6.35 mm)

3/4 inch

(19.05 mm)

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Installation of Water Wizard™ (optional)

Evaporative Cooling with the Water Wizard™

NOTE

The following instructions are provided for evaporative coolers equipped with the Water Wizard™ only. Additional instructions are provided for evaporative coolers equipped with the auto-drain and fill or bleed-off.

WARNING

Disconnect and lock-out all power and gas before performing any maintenance or service to the unit. Failure to do so could result in serious injury or death and damage to equipment.

Three-Sided Evaporative Coolers

Housing

Size

H-50 21 26

1. Install Normally Closed Supply Line/Solenoid

Connect the water supply line to the manual supply valve in the unit. Install the supply solenoid in the supply line, upstream of the manual supply valve and below the roof line.

2. Install Normally Open Drain Line/Solenoid

Connect the drain line to the supply line between the manual supply valve and the supply solenoid. Install a drain solenoid in the drain line, below the roof line. A trap should be installed in the drain line.

Water Pressure (in. wc)

Front Sides

3. Wire the Solenoid(s)

Wire the supply line solenoid and drain solenoid as shown on the unit’s wiring diagram in the control center.

4. Wire the Temperature Sensor

If the evaporative cooler shipped separate from the unit, the temperature sensor must be wired. The sensor wire is bundled inside the discharge end of the evaporative cooler. Wire the sensor wire to the unit’s control center. Refer to ladder diagram for proper connections.

NOTE

The Water Wizard™ start-up must be completed for proper performance.

NOTE

Solenoid(s) may be provided by manufacturer (if ordered) or by others.

CAUTION

Any wiring deviations may result in personal injury or property damage. Manufacturer is not responsible for any damage to, or failure of the unit caused by incorrect final wiring.

To Media

Sump Drain

Trap

Manual Supply Valve

Roof Line

Supply Line Drain Solenoid

(normally open)

Water Wizard™ Installation

Pressure Gauge

Supply Solenoid

(normally closed)

Factory

Installed

Field

Installed

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Installation of Building Pressure Control (optional)

Installation of Dirty Filter Switch (optional)

1. Mount Pressure Tap

Using the factory-provided bracket, mount the pressure tap to the outside of the unit. Choose a location out of the prevailing winds and away from supply or exhaust fans to assure accurate readings.

2. Run Pressure Tap Lines

Run a pressure tap line from the pressure tap on the outside of the unit to the low pressure tap on the back of the photohelic gauge. Run a second pressure tap line from the high pressure tap on the back of the photohelic gauge to the space. Fifty feet of tubing is supplied with the unit.

High Pressure

Factory

Wiring

Low Pressure

Tap

to outside

Connections for Photohelic Gauge

Tap

to space

3. Set the Building Pressure

The pressure gauge is used to set the desired building pressure.

The pressure is set by adjusting the knobs for the upper and lower pressure limits.

To adjust the switch, the unit must be running with all of the access doors in place, except for the compartment where the switch is located. The adjusting screw is located on the top of the switch.

Setscrew (on front of switch) must be manually adjusted after the system is in operation.

Negative pressure connection is toward the 'front or top' of the switch. (Senses pressure on the

blower side of filters)

Positive pressure connection is toward the 'back or bottom' of the switch. (Senses pressure at the inlet side of filters)

1. Open the ﬁlter compartment and place a sheet of plastic or cardboard over 50% of the ﬁlter media.

2. Replace the ﬁlter compartment door.

3. Check to see if there is power at the alert signal leads (refer to electrical diagram).

4. Whether there is power or not, turn the adjustment screw on the dirty ﬁlter gauge - clockwise if you did not have power, counterclockwise if you did have power - until the power comes on or just before the power goes off.

5. Open the ﬁlter compartment and remove the obstructing material.

6. Replace the door and check to make sure that you do not have power at the alert signal leads. The unit is now ready for operation.

Pressure Indicating Needle Pressure Setting Needles

Pressure Setting Knobs

Typical Photohelic Gauge

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+ 25 hidden pages