Greenheck MSX User Manual

Document 470658

MSX

Make-Up Air Unit

Installation, Operation and Maintenance Manual

Please read and save these instructions. 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! Retain instructions for future reference.

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 Electric 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 maximum cataloged fan rpm. Adjustments to fan speed signiﬁcantly effects 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.

IMPORTANT

All factory provided lifting lugs must be used when lifting any unit. Failure to comply with this safety precaution could result in property damage, serious injury or death.

WARNING

Disconnect all electrical power to the fan and secure to the “OFF” position prior to inspection or servicing. Failure to comply with this safety precaution could result in serious injury or death.

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.

Modular Supply Make-Up Air Unit

Receiving

Upon receiving the product check to make sure all items are accounted for by referencing the bill of lading to ensure all items were received. Inspect each crate for shipping damage before accepting delivery. Notify the carrier if any damage is noticed. The carrier will make notiﬁcation on the delivery receipt acknowledging any damage to the product. All damage should be noted on all the copies of the bill of lading which is countersigned by the delivering carrier. A Carrier Inspection Report should be ﬁlled out by the carrier upon arrival and reported to the Trafﬁc Department. If damaged upon arrival, ﬁle claim with carrier. 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 (-1°C) and 110F (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.

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 hard to reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive or WD-40® 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.

506 (Ashland Inc.) or the equivalent. For

Modular Supply Make-Up Air Unit

Table of Contents

Installation

Clearance to Combustibles/Service Clearances . . 4

Indoor Unit ............................... 4

Unit Arrangement DB / HZ / UB .............. 4

Roof Mounted Unit — Arrangement DBC ......5-6

Optional Evaporative Cooling Module .......... 7

Electrical Wiring ........................... 8

Optional Electrical Heater ................... 9

Optional Evaporative Cooling Piping ........10-11

Optional Water Wizard™ ................... 12

Optional Direct Expansion (DX) Coil Piping . . . 13-14

Optional Chilled Water Coil Piping ........... 15

Optional Building Pressure Control ........... 15

Start-Up

Start-Up Check List ....................... 16

Blower ................................. 17

Optional Electric Heater .................... 18

Optional Economizer ...................... 19

Optional Evaporative Cooling Recirculating .... 20

Optional Water Wizard™ .................21-22

Operation

Optional VAV Units ........................ 23

Optional Recirculating Units ................ 24

Electrical ................................ 25

Optional Water Wizard™ ................... 26

Troubleshooting

Blower ................................. 27

Motor Overamps ......................... 28

Insufficient / Too Much Airflow .............. 29

Excessive Noise or Vibration ................ 30

Optional Electric Heater .................... 31

Optional Evaporative Cooling ............... 32

Optional Water Wizard™ ................... 33

Maintenance

Routine ...............................34-36

Fall .................................... 36

Reference

Control Center Layout / Dirty Filter Switch ..... 37

Maintenance Log .......................38-39

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

Modular Supply Make-Up Air Unit

Installation

Service Clearances

Floor Top Sides Ends

Insulated/

Units

Non Insulated

Units

Clearance to combustibles is deﬁned as the minimum distance required between the heater and adjacent combustible surfaces to ensure the adjacent surface’s temperature does not exceed 90 degrees above the ambient temperature.

Recommended Minimum Service Clearances

Housing 32 and less

Housing 35 and higher

Clearances for component removal (such as evaporative cooler media) may be greater than the service clearances listed.

0 inches

(0 mm)

0 inches

(0 mm)

0 inches

(0 mm)

6 inches

(152.4 mm)

on the controls side of the unit

Installation of Indoor Unit

1. Install Hangers. Install threaded hangers from

ceiling supports. When locating hangers, allow enough room to open access panel(s). Two nuts must be used on the end of each threaded hanger. Ceiling supports are supplied by others.

2. Install Unit. Using sheet metal screws, attach the weatherhood/thru-wall/ﬁlter section to the blower/ burner section. The ﬂange on the weatherhood/thruwall/ﬁlter section should overlap the ﬂange on the blower/burner section.

Raise the assembled unit into place. Using two nuts per hanger, fasten the unit supports

to the hangers under the unit. Appropriate unit supports, such as the optional hanging bracket kit or c-channel and angle iron (supplied by others) should be used.

Using self tapping screws, attach ductwork to unit. In order to prevent the unit from swinging and

to provide a safe environment for service and maintenance, additional measures must be taken to secure the unit in all directions.

Ceiling Supports

0 inches

(0 mm)

6 inches

(152.4 mm)

42 inches (1066.8 mm)

48 inches (1219.2 mm)

Ductwork

0 inches

(0 mm)

6 inches

(152.4 mm)

NOTE

Two nuts must be used on each end of each threaded hanging rod for proper support.

NOTE

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. Reference the CAPS submittal for duct sizes.

Sealant

3. Seal Wall Opening. Apply sealant around the perimeter of the weatherhood to prevent water penetration and drafts into the building.

Seal Wall Opening

Installation of Arrangement DB / HZ / UB

1. Install Curb and/or Equipment Support(s).

Position curb/equipment support(s) on the roof (reference the CAPS submittal for placement of curb/ equipment support(s) in relation to the unit). Verify that unit supports are level, shim if necessary. Attach curb to roof and ﬂash into place. Attach the equipment support(s) to the roof, remove metal cover, ﬂash to wooden nailer and reinstall cover.

Roof Curb

Metal Cover

Equipment Support

Roof Curb and Equipment Support

2. Install Ductwork. followed for all ductwork. All ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA 96 and all local codes. Reference the CAPS submittal for ductwork sizes.

Good duct practices should be

Hangers

Modular Supply Make-Up Air Unit

Indoor

Mounting

Unit Supports

NOTE

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

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

Supply Air Ductwork

Supply Ductwork by Others

Exhaust Ductwork by Others

(Arrangement DB only)

Sealant

Ductwork

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/equipment support(s).

Use self-tapping sheet metal screws to fasten the

unit to the curb/equip support(s).

Installation of Roof Mounted Unit Arrangement DBC

1. Install Curb/Equipment Support(s). Position

curb/equipment support(s) on the roof (reference the CAPS submittal for placement of curb/equipment support(s) in relation to the unit). Verify that all unit supports are level, shim if necessary. Attach curb to roof and ﬂash into place. Attach the equipment support(s) to the roof, remove metal cover, ﬂash to wooden nailer and reinstall cover.

Roof Curb

Metal Cover

Equipment Support

Roof Curb and Equipment Support

2. Install Combination Extension. Install combination extension over curb. Lag into place using wood screws. Locate the extension so the tall vented side is over the exhaust opening.

Setting Unit

NOTE

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

NOTE

Some units come with the weatherhood attached and Step 5 may not apply.

5. Assemble and Attach Weatherhood. The weatherhood can now be assembled and attached to the unit. Detailed assembly instructions can be found with the weatherhood. If the optional evaporative cooling module was selected, this step does not apply, refer to the Installation of the Optional Evaporative Cooling Module section.

6. Seal Weatherhood Seam. Using an appropriate sealant, seal the seam between the weatherhood and the unit.

Exhaust

Supply

1 inch Inside Flange

Combination Extension

3. Install Ductwork. Good duct practices should be followed for all ductwork. All ductwork should be installed in accordance with SMACNA and AMCA guidelines, NFPA 96 and any local codes. Reference the CAPS submittal for ductwork size and location.

Ductwork

NOTE

Complete Rooftop Installation

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

Modular Supply Make-Up Air Unit

4. Apply Sealant. Apply an appropriate sealant

Supply Duct with Duct Adapter Installed

Exhaust Duct Installed

Sealant

around the perimeter of the curb and duct adapter(s) to isolate fan vibration and prevent water penetration.

Sealing Ductwork

5. Install Exhaust Fan. Fasten exhaust fan to curb extension with self-tapping sheet metal screws.

Installing the exhaust fan prior to the supply unit will allow for easier installation of options.

Model CUBE Exhaust Fan

7. Install Supply Unit. Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the extension/equipment support(s).

Use self-tapping sheet metal screws to fasten the

unit to the extension/equipment support(s).

Installing Supply Unit

Installing Exhaust Fan

NOTE

NFPA 96 requires the exhaust fan to be hinged.

6. Install Exhaust Options. Install optional hinge kit with restraining cables and grease trap with drain connection.

NOTE

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

NOTE

Some units come with the weatherhood attached and Step 8 may not apply.

8. Assemble and Attach Weatherhood. The weatherhood can now be assembled and/or attached to the unit. Detailed assembly instructions can be found with the weatherhood. If the optional evaporative cooling module was selected, this step does not apply, refer to the next section, Installation of the Optional Evaporative Cooling Module.

9. Seal Weatherhood Seam. Using an appropriate sealant, seal the seam between the weatherhood and the unit.

Modular Supply Make-Up Air Unit

Complete Combination Installation

Installation of Evaporative Cooling

Metal Cover

Equipment Support

Module (optional)

NOTE

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

1. Locate Equipment Support(s). 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 necessary. Attach equipment support to the roof, remove metal cover, ﬂash to wooden nailer and reinstall cover.

2. Apply Sealant. Apply an appropriate sealant around the airstream opening to create an air tight seal.

Equipment Support

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. To fasten the sides, the media must be removed. To remove the media, ﬁrst remove the access panel on the evaporative module and disconnect the evaporative pump(s). The media will now slide out. With the media removed, you can access the side fastening points inside the evaporative module. With all the screws in place, reinstall the media, reconnect the pumps and r

einstall

the access panel.

Securing Evaporative Module

Sealant

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.

NOTE

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

Placing Evaporative Module

NOTE

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

Modular Supply Make-Up Air Unit

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 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 105°C, except for an energy cut-off or sensor lead wire which must be rated to 150°C.

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.

2. Provide the Opening(s) for the Electrical Connection. 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). Torque ﬁeld connections to 20in.-lbs.

4. Wire the Optional Convenience Outlet. The convenience outlet requires a separate 115 volt 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 accessories:

• Blower Switch

• Heat Switch

• Indicating Lights

• Dirty Filter Indicator

• TSCP

• KSCP

NOTE

TSCP has number-to-number wiring.

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.

NOTE

Large evaporative coolers may require a separate power supply.

Modular Supply Make-Up Air Unit

Installation of Electric Heater

(optional)

WARNING

Electrical Shock Hazard! Disconnect all power sources before doing any work on the unit.

The requirements and practices described below are based on the National Electric Code (NEC) and The Space Heating Standard of the Underwriters Laboratories Inc. (UL). Although UL requirements are uniform throughout the country, local electrical codes may deviate from the National Electrical Code. Therefore, local inspection authorities should be consulted regarding local requirements.

Electrical Wiring Instructions

1. Use the wiring diagram supplied with the heater as a guide in correlating ﬁeld wiring with the heater internal wiring.

2. All ﬁeld wiring to the heater must meet the requirements of the National Electric Code and any other applicable local or state codes.

3. Wiring to the heater must be rated for 75°C (167°F) minimum.

4. The fan is interlocked by the factory to the control circuit so the electric heater will not operate unless the fan is on.

5. If heater does not have a built-in disconnect switch or main circuit breaker, install a remote disconnect (furnished by others) in accordance with the National Electric Code, Article 424-65.

Effect of Low Voltage on Wattage and British Thermal Unit (BTU)

The heating elements may be used on voltages lower than the design voltage of the heater, however, the wattage and BTU output will be reduced to the percentages listed in the table below.

Derated Wattage For Low Voltage

% of

Heater

Voltage

Line

Voltage

Heater

Wattage

Heater

Voltage

Line

Voltage

and BTU

480 460 92 208 200 92

440 84 190 83

277 265 92 120 115 92

254 84 110 84

240 230 92

220 84

208 75

200 69

% of

Heater

Wattage

and BTU

Modular Supply Make-Up Air Unit

Installation Evaporative Cooler Piping (optional)

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.

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

A trap should be used to prevent sewer gas from

being drawn into the unit.

3. Check/Adjust Water Level.

Check the water level in the sump tank. The water level should be

Drain Trap

6 in. min.

above the pump intake and below the overﬂow. Adjust the ﬂoat as needed to achieve the proper water level.

Drain Line Valve

(By Others)

Drain Line

Trap

Evaporative Cooling with Recirculating Pump

6 in. min.

Supply

Line

Supply Line

Valve

(By Others)

Overflow

Auto Drain & Fill Evaporative Piping

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

All solenoids 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.

IMPORTANT

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.

Auto Drain & Flush Valves

(When provided by Manufacturer)

Assembly

Number

852178

Part numbers subject to change.

Mfg Part

Number

461262 8210G2

461263 8262G262

461264 8210G35

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 & Fill Evaporative Piping drawing on previous 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 sewer gas from being drawn into the unit.

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 as needed to achieve the proper water level.

ASCO

Part

Number

Solenoid

Supply Closed

Supply

Sump

Drain Trap

Type

Line

Drain

De-Energized

Position

Open

Diameter

1/2 inch

(12.7 mm)

1/4 inch

(6.35 mm)

3/4 inch

(19.05 mm)

6 in. min.

Qty.

Modular Supply Make-Up Air Unit

Sump Drain

VALVE C

Sump Drain Solenoid

(Normally Open)

Sump Overflow

Supply

Line

VALVE A

Supply Solenoid

(Normally Closed)

VALVE B

Supply Line Drain Solenoid

(Normally Open)

Trap

Drain Line

Evaporative Cooling with Auto Drain and Fill

Modular Supply Make-Up Air Unit

Installation of Water WizardTM (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.

Roof

Line

Trap

Sump Drain

To Media

Pressure

Gauge

Manual Supply

Valve

Supply Solenoid

(Normally Closed)

Supply Line Drain Solenoid

(Normally Open)

Water Wizard™ Installation

Factory

Installed

Field

Installed

Water Wizard™ Valves

(When provided by Manufacturer)

Unit

Assembly

Model

MSX -

H12/H22

MSX - H32

(<9000 cfm)

MSX - H32

(≥9000 cfm)

MSX-H35,

H38, H42

Part numbers subject to change.

Number

852370

852371

Mfg.

ASCO

Part

Part No.

No.

461262 8210G2

383086 8210G34

383088 8210G9

383086 8210G34

Solenoid

Type

Supply Closed

Supply

Line

Drain

Supply Closed

Supply

Line

Drain

De-

Energized

Position

Open

Diameter Qty.

(12.7 mm)

(19.05 mm)

(12.7 mm)

1/2 inch

3/4 inch

1/2 inch

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.

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 terminals as shown on the unit’s wiring diagram.

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.

Modular Supply Make-Up Air Unit

Installation of Direct Expansion (DX) Coil Piping (optional)

Liquid Line

Equalizer Line

Suction Header

Distributor

Coil

IMPORTANT

Guidelines for the installation of direct expansion cooling coils have been provided to insure proper performance and longevity of the coils. These are general guidelines that may have to be tailored to meet the specific requirements of any one job. As always, a qualified party or individual should perform the installation and maintenance of any coil. Protective equipment such as safety glasses, steel toe boots and gloves are recommended during the installation and maintenance of the coil.

IMPORTANT

All field brazing and welding should be performed using high quality materials and an inert gas purge (such as nitrogen) to reduce oxidation of the internal surface of the coil.

IMPORTANT

All field piping must be self-supporting and flexible enough to allow for the thermal expansion of the coil.

1. Locate the Distributor(s) by Removing the Distributor Access Panel

Nozzle

Thermal

Expansion Valve (by others)

Hot Gas Bypass (by others)

Suction Line

Remote Sensing Bulb

Straps

Suction Connection

Installation with Hot Gas Bypass

NOTE

If a hot gas bypass kit was provided by others, refer to the manufacturer’s instructions.

Liquid Line

Thermal Expansion

Valve (by others)

Suction Line

Remote Sensing Bulb

Equalizer Line

Nozzle

Suction Header

Distributor

Straps

General Installation

Coil

Suction Connection

Distributor Access Panel Distributor Location

2. Verify Nozzle Placement. Inspect the refrigerant distributor and verify that the nozzle is in place. The nozzle is generally held in place by a retaining ring or is an integral part of the distributor itself.

Retainer Ring

Nozzle Distributor

Nozzle Placement

3. Install Suction Line. Install suction line(s) from the compressor to the suction connection(s) which are stubbed through the side of the cabinet.

4. Install the Liquid Line and Thermal Expansion Valve (TEV) (by others). Liquid line openings vary

by coil size and circuiting and are ﬁeld supplied. Follow the TEV recommendations for installation to avoid damaging the valve.

5. Mount the Remote Sensing Bulb

(by others). The expansion valve’s remote sensing

bulb should be securely strapped to the horizontal run of the suction line at the 3 or 9 o’clock position and insulated.

6. Check Coil Piping for Leaks. Pressurize the coil to 100 psig with dry nitrogen or other suitable gas. The coil should be left pressurized for a minimum of 10 minutes. If the coil holds the pressure, the hook-up can be considered leak free. If the pressure drops by 5 psig or less, re-pressurize the coil and wait another 10 minutes. If the pressure drops again, there is likely one or more small leaks which should be located and repaired. Pressure losses greater than 5 psig indicate a large leak that should be isolated and repaired.

7. Evacuate and Charge the Coil. Use a vacuum pump to evacuate the coil and any interconnecting piping that has been open to the atmosphere. Measure the vacuum in the piping using a micron gauge located as far from the pump as possible. Evacuate the coil to 500 microns or less, and then close the valve between the pump and the system. If the vacuum holds to 500 microns or less for one minute, the system is ready to be charged or refrigerant in another portion of the system can be opened to the coil. A steady rise in microns would indicate that moisture is still present and that the coil should be further vacuumed until the moisture has been removed.

Modular Supply Make-Up Air Unit

8. Install the Drain Line.

Connect an unobstructed drain line to the drain pan. A trap should be used to prevent sewer gas from being drawn into the unit.

6 in. min.

Drain Trap

IMPORTANT

All traps must be installed below the roof line or be otherwise protected from freezing.

NOTE

Failure to obtain a high vacuum indicates a great deal of moisture or a small leak. Break the vacuum with a charge of dry nitrogen or other suitable gas and recheck for leaks. If no leaks are found, continue vacuuming the coil until the desired vacuum is reached.

Modular Supply Make-Up Air Unit

Installation of Chilled Water Coil Piping

Hot Return Connection

Cold Supply Connection

Entering Air Leaving Air

(optional)

IMPORTANT

Guidelines for the installation of the cooling coil have been provided to insure proper performance of the coils and their longevity. These are general guidelines that may have to be tailored to meet the specific requirements of any one job. As always, a qualified party or individual should perform the installation and maintenance of the coil. Protective equipment such as safety glasses, steel toe boots and gloves are recommended during the installation and maintenance of the coil.

When installing couplings, do not apply undue stress to the connection. Use a backup pipe wrench to avoid breaking the weld between the coil connection and the header.

All field piping must be self-supporting. System piping should be flexible enough to allow for the thermal expansion and contraction of the coil.

1. Verify Coil Hand Designation. Check the coil hand designation to ensure that it matches the system. Coils are generally plumbed with the supply connection located on the bottom of the leaving air-side of the coil and the return connection at the top of the entering air-side of the coil. This arrangement provides a counter ﬂow heat exchanger and positive coil drainage.

2. Check the Coil for Leaks. Pressurize the coil to 100 psig with dry nitrogen or other suitable gas. The coil should be left pressurized for a minimum of 10 minutes. If the coil holds the pressure, the hook-up can be considered leak free. If the pressure drops by 5 psig or less, re-pressurize the coil and wait another 10 minutes. If the pressure drops again there is likely one or more small leaks which should be located and repaired. Pressure losses greater than 5 psig indicate a large leak that should be isolated and repaired.

3. Connect the Supply and Return Lines. Connect the supply and return lines as shown above.

4. Install the Drain Line. Connect an unobstructed drain line to the drain pan. A trap should be installed to prevent sewer gas from being drawn into the unit.

Drain

Trap

6 in. min.

Installation of Building Pressure Control (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.

Factory

Wiring

Low Pressure

Tap

to Outside

Connections for Photohelic Gauge

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. Typical settings are 0.0 inch wc for the lower and 0.10 inch wc for the upper pressure setting.

Pressure Indicating

Needle

Pressure Setting Knobs

Typical Photohelic Gauge Settings

Pressure Setting

Needles

High Pressure

Tap

to Space

All traps must be installed below the roof line or be otherwise protected from freezing.

IMPORTANT

Modular Supply Make-Up Air Unit

Start-Up Checklist

SPECIAL TOOLS REQUIRED

• Voltage Meter (with wire probes)

• Amperage Meter

• Micro Amp Meter

• Tachometer

• Thermometer

• Incline manometer or equivalent

Start-Up Checklist

Unit Model Number _______________________________

Unit Serial Number _______________________________

Start-Up Date _______________________________

Start-Up Personnel Name __________________________

Start-Up Company _______________________________

Phone Number _______________________________

Pre Start-Up Checklist – check boxes as items

are completed. Check tightness of all factory wiring connections Verify control wiring wire gauge Hand-rotate blower to verify free rotation Verify supply voltage to the main disconnect Verify remote controls wiring

Start-Up Blower Checklist – refer to Blower

Start-Up section for further detail.

Check line voltage L1-L2 __________

L2-L3 __________ L1-L3 __________ Check blower rotation

Check for vibration Supply fan RPM _________ RPM Motor nameplate amps _________ Amps Actual motor L1 _______ Amps

L2 _______ Amps L3 _______ Amps Actual CFM delivered _________ CFM

(e.g. MSX-120-H32-DB)

(e.g. 10111000)

Optional Accessories – refer to Blower Start-Up

section, Step #6 for further detail.

Heating Inlet Air Sensor

________ Actual Setting

Typical setting 60º-70ºF (15º-21ºC)

Cooling Inlet Air Sensor

________ Actual Setting

Typical setting 75ºF (24ºC)

Building Freeze Protection

________ Actual Setting

Typical setting 5 minutes; 45ºF (7ºC)

Dirty Filter Gauge

________ Actual Setting

Typical setting varies

Start-Up Electric Heater (optional) – refer to

Electric Heater Start-Up section for further detail.

Check line voltage L1-L2 __________

L2-L3 __________ L1-L3 __________

Set the unit’s operating temperature

________ °F

Start-Up Evaporative Cooler (optional) – refer

to Evaporative Cooler Start-Up section for further detail.

Check media orientation

Check for proper water flow to distribution

headers

Check for distribution header orientation to

prevent water spillage

Modular Supply Make-Up Air Unit

Start-Up - Blower

Pre Start-Up Check

Rotate the fan wheel by hand and make sure no parts are rubbing. Check the V-belt drive for proper alignment and tension (a guide for proper belt tension and alignment is provided in the Belt Maintenance section). Check fasteners, set screws and locking collars on the fan, bearings, drive, motor base, and accessories for tightness.

WARNING

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

WARNING

Check the housing, blower, and ductwork for any foreign objects before running the blower.

1. Check the Voltage. Before starting the unit, compare the supplied voltage, hertz, and phase with the unit and motor’s nameplate information.

2. Check the Blower Rotation. Open the blower access door and run the blower momentarily to determine the rotation. Arrows are placed on the blower scroll to indicate the proper direction or reference the example shown to the right.

NOTE

To reverse the rotation on three phase units, disconnect and lock-out the power, then interchange any two power leads.

NOTE

To reverse the rotation on single phase units, disconnect and lock-out the power, then rewire the motor per the manufacturer’s instructions.

IMPORTANT

If the blower is rotating in the wrong direction, the unit will move some air, but will not perform as designed. Be sure to perform a visual inspection to guarantee the correct blower rotation.

Blower

Housing

Blower Rotation

3. Check for Vibration. Check for unusual noise, vibration or overheating of the bearings. Reference the Troubleshooting section for corrective actions.

IMPORTANT

Excessive vibration may be experienced during the initial start-up. Left unchecked, it can cause a multitude of problems including structural and/or component failure.

IMPORTANT

Generally, fan vibration and noise is transmitted to other parts of the building by the ductwork. To minimize this undesirable effect, the use of heavy canvas duct connectors is recommended.

4. Motor Check. Measure the motor’s voltage, amps and RPM. Compare to the speciﬁcations. Motor amps can be reduced by lowering the motor RPM or increasing system static pressure.

IMPORTANT

Additional starters and overloads may be provided in the make-up air control center for optional exhaust blowers. Any additional overloads must be checked for proper voltage, amps and RPMs.

5. Air Volume Measurement & Check. Measure the unit’s air volume (cfm) and compare it with it’s rated air volume. If the measured air volume is off, adjust the fan’s RPM by changing/adjusting the drive.

NOTE

The most accurate way to measure the air volume is by using a pitot traverse method downstream of the blower. Other methods can be used but should be proven and accurate.

IMPORTANT

Changing the air volume can significantly increase the motor’s amps. If the air volume is changed, the motor’s amps must be checked to prevent overloading the motor.

NOTE

To ensure accuracy, the dampers are to be open when measuring the air volume.

6. Set-Up Optional Components. Adjust the settings on the optional components. See the Control Center Layout in the Reference section for location of optional components.

• Heating Inlet Air Sensor Typical setting: 60-70°F (15-21°C)

• Cooling Inlet Air Sensor Typical setting: 75°F (24°C)

• Building Freeze Protection Typical setting: 5 minutes; 45°F (7°C)

• Dirty Filter Gauge Typical setting: Settings vary greatly for each unit.

Modular Supply Make-Up Air Unit

Start-Up - Electric Heater (optional)

Pre Start-Up Check

Check all electrical connections. Tighten any loose connection to all components including contactors, heating elements and main power lugs.

WARNING

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

1. Check the Voltage. Before starting the heater, compare the supplied voltage, hertz, and phase with the heater’s nameplate information.

2. Airﬂow Interlock. With the supply fan on, verify the electric heater’s airﬂow interlock (DDS) is made.

3. Set the Unit’s Operating Temperature. Set the operating temperature by adjusting the discharge temperature selector. Typical settings are 65-70°F (18-21°C).

NOTE

If the heater is equipped with an optional inlet air sensor the heater will not energize unless the outdoor air temperature is less than the inlet air sensor’s set point.

Modular Supply Make-Up Air Unit

Optional Economizer

The following economizer sequences will function to modulate the outdoor and return air dampers to determine and maximize the availability of free cooling. Although the Honeywell economizer controller contains numerous set points, the adjustment of only a few is necessary to ensure optimal performance.

Sequences

EC-1 Outdoor Air Temperature Reference

This mode compares the outdoor air temperature to the dry bulb temperature set point (DRYBLB SET). Once the outdoor air temperature is less than DRYBLB SET, the unit will modulate the position of the dampers to maintain a predetermined mixed air temperature (MAT SET).

EC-2 Outdoor Air Enthalpy Reference

This mode compares the outdoor air enthalpy to a preset enthalpy curve. When the outdoor air conditions are within this curve, the dampers will modulate to maintain a mixed air temperature (MAT SET).

EC-3 Differential Temperature Reference

This mode compares the outdoor air temperature and the return air temperatures. If the outdoor air is cooler than the return, the dampers will modulate to maintain a preset mixed air temperature (MAT SET).

EC-4 Differential Enthalpy Reference

This mode compares the outdoor air enthalpy and the return air enthalpy. If the outdoor air enthalpy

Relevant Set points

1. MAT SET - The mixed air temperature set point. The control will modulate the damper to maintain temperature as best as it can (Set point menu, Default 53°F )

2. LOW T LOCK - The set point for the low temperature mechanical cooling lockout. (Set point menu, Default 32°F)

3. DRYBLB SET - The outdoor air set point to call for economizer. (Set point menu, Default 63°F)

4. MIN POS - The minimum signal voltage sent to the dampers. This must be set to 2 VDC. (Set point menu, Default 2.8 VDC)

5. AUX1 O – The controllers operating sequence structure. (Set point menu, Default ‘None’)

6. ERV OAT SP - The set point for low temperature economizer lockout. This is the low temperature set point when AUX1 O is set to ERV. (Set point menu, Default 32°F)

7. STG3 DLY - Time delay after second cooling stage is enabled (Advanced setup menu, Default 2 hrs.)

Using the Keypad with Settings and Parameters

To use the keypad when working with Set points, System and Advanced Settings, Checkout tests, and Alarms:

1. Navigate to the desired menu.

2. Press currently displayed menu.

3. Use the parameter.

4. Press (enter) to display the value of the currently displayed item.

5. Press the displayed parameter value.a

6. Press the displayed parameter value.

7. Press (enter) to accept the displayed value and store it in non-volatile RAM.

8. CHANGE STORED displays.

9. Press parameter.

10. Press (escape) to return to the current menu parameter.

When values are displayed, pressing and holding the

or button causes the display to automatically

increment.

(enter) to display the ﬁrst item in the

and buttons to scroll to the desired

button to increase (change) the

(enter) to return the current menu

Modulate Dampers

1. Navigate to the Checkout menu and press (Enter).

2. The cooling should turn off

3. Navigate to Damper Open and press (enter) twice to

run the test.

4. Voltage between terminals ACT 2-10 and ACT COM

should be 10 VDC. This will open the outdoor air damper and close the return air damper

5. Press (escape), navigate to Damper Close and press

(enter) twice to run the test.

6. Voltage between terminal ACT 2-10 and ACT COM

should be 2 VDC. This will close the outdoor air damper and open the return air damper.

Modular Supply Make-Up Air Unit

Start-Up - Evaporative Cooling

Recirculating (optional)

1. Check the Installation. The media may have been

removed during installation, so its orientation should be double checked. The

Entering Air

media should be installed with the steeper ﬂute angle sloping down towards

Media Orientation

the entering air side. Verify that the stainless steel caps and distribution

headers are in place. The headers should be located over the media towards the entering air side. The caps should be placed over the headers.

2. Check the Pump Filter. Check that the pump ﬁlter is around the pump inlet.

3. Fill the Sump and Adjust the Float. Turn on the water supply and allow the sump tank to ﬁll. Adjust the ﬂoat valve to shut-off the water supply when the sump is ﬁlled to within 1 inch of the bottom of the overﬂow.

4. Break-In the Media. Open the bleed-off valve completely and saturate the media with the blower(s) off for no less than 20minutes.

45º

Leaving Ai

15º

air sensor should be installed in an area that is shaded from direct sunlight so the outside air sensor probe will detect an accurate air temperature.

Set the Timer Scale and

Settings dials:

• T1 timer setting set to 10

and timer scale set to 1d for 1 day of operation

• T2 timer setting set to 10 and the timer scale set to 10m for 10 minutes of drain time

Timer Scale

Timer

Settings

Timer Scale

8. Put the Unit into Service.

Remove the jumper, and energize the blower(s). Verify proper operation.

IMPORTANT

Check the media for minerals after two weeks of service and adjust the bleed-off rate accordingly.

Bleed-Off

Valve

Overflow

Pump

Filter

Supply

Connection

Float

Valve

Threaded Float

Adjustment

NOTE

A jumper will need to be installed in the control center to power the evaporative pumps with the blower(s) off. Reference the unit’s ladder diagram to determine proper terminals.

5. Check the Flow Rate. The pumps should provide enough water to saturate the media in 45 to 60 seconds. Consult the factory, if adequate ﬂow is not achieved.

6. Adjust the Water Bleed-Off Rate. The water bleed-off rate is dependent on the water’s mineral content. The bleed-off should be adjusted based on the media’s mineral deposits after two weeks of service.

7. Set the Optional Auto Drain and Fill. This system will automatically drain the sump tank and ﬁll it with fresh water at the ﬁeld-adjustable intervals, typically once every 24 hours. This ﬂushes mineral build-up and debris from the tank to promote low maintenance and increase media pad life.

In addition, the system will protect the evaporative cooler from freezing by draining the sump tank and supply line when the outside temperatures fall below the set point of the outside air sensor. Typically, this is set at 45º to 50º F. The auto drain and ﬁll outdoor

Evaporative Cooler Set-Up

Modular Supply Make-Up Air Unit

Start-Up - Water Wizard™ (optional)

L1 L2 L3

Function Key

Enter Key

Water Wizard™ User Interface

Key Function Description

1. Open the Solenoid. Conﬁrm that the manual water supply valve is closed. Press and hold the Function Button for one second. L3 will begin blinking (short on, long off), indicating that Flow Test Mode is active and the supply solenoid is open.

2. Set the Water Pressure. With the solenoid open, set the supply water pressure to the correct setting (see table below). Use the manual supply valve to adjust the supply pressure. A pressure gauge is provided between the manual supply valve and the media.

Up Key

Down Key

5. Check Media. Start the cooling cycle and check the media after one hour of operation. If the media is continuously dry or if too much water is draining from the sump tank, refer to Troubleshooting, Water Wizard™.

NOTE

Steps 6 through 8 are provided to adjust the minimum cooling temperature. The minimum cooling is preset to the factory recommended 75°F (24°C). Only adjust if needed.

NOTE

The inlet air sensor function overrides and shuts down the evaporative cooler if the outside temperature falls below the minimum cooling temperature.

6. Enter Program Mode. Press and hold the Enter Key

for three seconds. The display will read

“Pro” when Program Mode is active.

WARNING

Opening the manual supply valve will allow water to pass to the media. Be sure the sump is safely draining before opening the manual supply valve.

NOTE

The manual supply valve ships closed and must be adjusted for proper performance.

Recommended Water Pressure Chart

Housing

Size

Media Width

(inches)

Water Pressure

(in. wc)

MSX-H12 30 20

MSX-H22

MSX-H32

⁄4 36 60 61 66 72

96* 42

MSX-H35 120* 61

MSX-H38 180* 37

MSX-H42 216* 51

*Multiple media sections. Values represent total media width.

NOTE

The recommended water pressure is based on media width. Refer to the table provided for proper water pressure settings.

Program Display

7. Adjust the Minimum Cooling Temperature. While in the Program Menu, use the Up and Down Keys to navigate the Menu Options until “toF” is displayed. Press the Enter Key

to access the

selected Menu Option setting.

Minimum Cooling

Temperature Display

Use the Up and Down Keys to adjust the Minimum

Cooling Temperature as needed. Press the Enter Key

to save the Minimum Cooling Temperature

setting and return to the Program Menu.

NOTE

The enter key

must be pressed to save the new

minimum cooling temperature.

3. Break-in Media. Leave the supply solenoid open to saturate and break-in media for 20 minutes with the blower off.

4. Close Solenoid. With the pressure set, press the Function Key

for one second to deactivate Flow Test Mode and allow the supply solenoid to close.

Modular Supply Make-Up Air Unit

8. Exit Program Mode. After 15 seconds of idle time the controller will exit Program Mode.

NOTE

The freeze temperature is preset to the factory recommended 45°F. Steps 9-11 should only be completed if the freeze temperature needs adjustment.

NOTE

The freeze temperature is the temperature at which the supply solenoid closes and the drain solenoid opens to drain the supply line, preventing possible freeze damage. A drain solenoid is required for this option.

9. Enter Program Mode. Press and hold the Enter Key

for three seconds. The display will read

“Pro” when Program Mode is active.

Program Display

10. Adjust the Freeze Temperature. While in Program Mode, use the Up and Down Keys to navigate through the Menu Options until “Frt” is displayed. Press the Enter Key

to access the

selected Menu Option setting.

Freeze Temperature Display

Use the Up and Down Keys to adjust the Freeze

Temperature setting as needed. Press the Enter Key

to set the Freeze Temperature and return

to the Program Menu.

NOTE

The enter key

must be pressed to save the new

freeze temperature.

11. Exit Program Mode. After 15 seconds of idle time the controller will exit Program Mode.

Modular Supply Make-Up Air Unit

Check Operation - VAV Units (optional)

NOTE

Blower Start-Up, Steps 1-5 should be performed before the blower is run.

NOTE

For maintenance issues associated with variable frequency drives, consult the drive’s manual supplied with the unit. The drives are programmed at the factory and should not need any adjustment during installation and start-up. For kitchen applications, the drive may be located in the kitchen or in the unit.

Variable Volume Operation

The variable volume option is recommended when a building’s exhaust volume may vary. This option enables the make-up air volume to track with the exhaust volume, providing only the amount of makeup air required. Control strategies include 2-speed and modulating blowers. Before the unit is left in service, the variable volume control system should be tested.

2-Speed

A variable frequency drive (VFD) is used to control air volumes. The VFD can be switched to low or high speed from a remote control panel. Turn the fan speed switch on the remote control panel to each position and conﬁrm that the fan speed adjusts accordingly.

Modulating

Potentiometer Control — a variable frequency drive is controlled by input from a remote speed selector (potentiometer). This unit allows easy manual adjustment of make-up air volumes. To test potentiometer operation, turn the potentiometer to the two extremes. With variable volume, make sure the fan goes to maximum and minimum speed.

When the potentiometer is at 0, the fan speed will be at its minimum. When the potentiometer is at 100, the fan will be at its maximum speed.

Potentiometer

EXHAUST

(OPTIONAL)

SUPPLY

HEAT

Control

BLOWER

MAIN VALVES

DIRTY FILTERS

(OPTIONAL)

GREENHECK

Building Pressure Control —

a variable frequency drive is controlled according to input from

EXHAUST

SUPPLY

HEAT

(OPTIONAL)

BLOWER

MAIN VALVES

a pressure sensing device.

Turn both knobs to the upper most pressure setting. You may

DIRTY FILTERS

(OPTIONAL)

have to remove the outdoor pressure tap tubing. VAV systems

PHOTOHELIC

should go to maximum speed. Set both knobs at the lowest setting and the VAV systems should go to minimum speed.

Pressure Control

Building

GREENHECK

Reset the correct pressure limits before starting the unit.

This picture depicts a typical

Pressure Indicating

Needle

Pressure Setting

Needles

photohelic setting. Typical settings are 0.0 inch wc for the lower pressure setting and 0.10 inch wc for the upper pressure setting. The needle indicates a negative building pressure. During correct operation, the indicating needle will remain between or near the setting needles.

Pressure Setting Knobs

Photohelic Gauge

External Signal — a variable frequency drive is controlled according to input from an external 2-10 VDC or 4-20 mA signal (by others).

A 2 VDC or 4 mA signal will send the blower to low speed. The blower will go to maximum speed with a 10VDC or 20 mA signal.

Variable Kitchen Control — a variable frequency drive is controlled by input from a remote speed control. This unit allows automatic adjustment of make-up air volumes based on varying cooking loads.

Modular Supply Make-Up Air Unit

Check Operation - Recirculating Units (optional)

NOTE

Blower Start-Up, steps 1-5 should be performed before the blower is run.

Recirculation Operation

The recirculation operation option is recommended when the ventilation equipment provides the primary source of heating for the space. Recirculation can vary from 100% return air to 100% outside air. Control strategies include 2-position and modulating dampers.

Before the unit is left in service, the recirculation control system should be tested.

2-Position Damper

A 2-position spring return actuator is used to control the return air amounts. The damper moves from open to closed. If power is cut to the unit, the outdoor air damper will fail to close.

Turn the recirculating switch on the remote control panel to each position and conﬁrm that the return air damper adjusts accordingly. The damper actuator may take a few minutes to open or close.

Modulating

Potentiometer Control — a modulating spring return actuator is used to control the return air amounts. The return air damper modulates from fully open to fully closed based on a signal from a remote potentiometer.

To test potentiometer operation, turn the potentiometer to the two extremes. Conﬁrm that the return air damper fully opens and fully closes. When the potentiometer is at 0, the return air damper will open. When the potentiometer is at 100, the return air damper will close. The damper actuator may take a few minutes to open or close.

EXHAUST

SUPPL Y

HEA T

RECIRCULA TION

(OPTIONAL)

BLOWER

MAIN V AL VES

DIRTY FIL TERS

(OPTIONAL)

GREENHECK

2-Position

Damper Control

BLOWER

EXHAUST

(OPTIONAL)

SUPPLY

MAIN VALVES

HEAT

DIRTY FILTERS

(OPTIONAL)

GREENHECK

Potentiometer

Control

Building Pressure Control — a modulating spring return actuator is used to control the return air amounts. The return air damper modulates from fully open to fully closed based on a signal from a remote pressure sensing device.

Turn both knobs to the upper most

EXHAUST

SUPPLY

BLOWER

(OPTIONAL)

MAIN VALVES

HEAT

pressure setting. You may have to remove the outdoor pressure tap tubing. The return air damper

DIRTY FILTERS

(OPTIONAL)

should close.

Set both knobs at the lowest

PHOTOHELIC

setting and the damper should

GREENHECK

open. It may take one to two minutes for the damper to reach the desired position.

Pressure Control

Building

Reset the correct pressure limits before starting the unit.

This picture shows a typical

Pressure Indicating

Needle

Pressure Setting

Needles

photohelic setting. Typical settings are 0.0 inch wc for the lower and 0.10 inch wc for the upper pressure setting. The needle in this photo indicates a negative building pressure. During correct operation, the indicating needle will remain between or near the setting needles.

Pressure Setting Knobs

Photohelic Gauge

External Signal — a modulating spring return actuator is used to control the return air amounts. Return air damper modulates from fully open to fully closed based on an external 2-10 VDC or 4-20 mA signal (by others).

The return air damper will close with a 10 VDC or 20mA signal. The return air damper should open with a 2VDC or 4mA signal. The damper actuator may take a few minutes to open or close.

Modular Supply Make-Up Air Unit

Operation - Electrical

Electrical Sequence

1. Exhaust Fan Contact (S1) Closed (optional)

• Power passes through N.C. contact on exhaust fan overload (ST2 OL), which is closed if exhaust fan (M2) has not overloaded

• Power passes to exhaust fan starter (ST2)

• N.O. contact on exhaust fan starter (ST2) is energized and closed

• Power passes to exhaust fan

• Exhaust fan (M2) starts

2. Supply Fan Contact (S2) Closed

• Power passes through N.C. ﬁeld supplied ﬁre contact (FSC)

• Power passes through optional N.O. contact on exhaust fan starter (ST2), which is closed when the optional exhaust starter (ST2) is activated

• Power passes through N.C. contact on supply starter overload (ST1 OL), which is closed if the supply fan has not overloaded

• Power passes through N.C. contact on optional freeze protection timer (RT4) which remains closed if the temperature has remained above the set point

• Power passes to and energizes optional inlet damper (D1), which opens

• Power passes through optional N.O. damper limit switch (DL1), which is energized and closed when the optional inlet damper is open. It may take several minutes for the damper to fully open and for the damper limit switch to close

• Power passes to and energizes fan relay (RF)

• Power passes through N.O. contact on fan relay (RF), which closes when the fan relay (RF) is energized

• Power passes to and energizes supply fan starter (ST1)

• N.O. contact on supply fan starter (ST1) is energized and closed

• Supply fan (M1) starts

3. Electric Heat Contact (S4) Closed (optional)

• Power passes through N.O. contact on fan relay (RF), which is energized and closed

• Power passes through N.C. contact on optional inlet air sensor (TS4), which is closed if the inlet air temperature is below the set point

• Power passes to and energizes heat relay (RH)

• Power passes through N.O. contact on heat relay (RH), which closes when the heat relay (RH) is energized

• Power passes through N.O. contact on pressure differential switch (PDS), which closes when proper airﬂow is achieved

• Power passes through N.C. automatic and

manual reset temperature cutouts (A and M), which remain closed if the maximum temperature has not been reached

• Power passes to and energizes operating contactor relay (C1)

• Power passes through N.O. contacts on operating contactor (C1), which is closed

• Electric heater modulates/stages to maintain temperature set point

4. Evaporative Cooling Contact (S4) Closed* (optional)

• N.O. contact on fan relay (RF) is energized and closed

• Power passes through N.O. contact on optional inlet air sensor (TS4), which is energized and closed if the inlet air temperature is above the set point

• Power passes to and energizes cool relay (RC)

• N.O. contact on cool relay (RC) is energized and closed

• Power passes to optional evaporative cooling pump (P1)

*If DX or chilled water coils are used rather than an evaporative cooler, the cooling sequence of operation will depend on the coil controls. Cooling coil controls are supplied by others.

Modular Supply Make-Up Air Unit

Operation - Water Wizard™ (optional)

L1 L2 L3

Function Key

Enter Key

Up Key

Down Key

Dry Bulb Temperature

The dry bulb temperature is visible on the home screen. If a number is not visible, wait 15 seconds and use the Up and Down Keys until a number is displayed.

Wet Bulb Temperature

To view the Wet Bulb Temperature, simultaneously press and hold the Up and Down Keys.

Water Wizard™ User Interface

Key Function Description

Drain Mode

Drain Mode locks open the drain solenoid and drains the supply line between the supply solenoid and the media. To activate Drain Mode simultaneously, press the Function and Enter Keys (L2 will light). To deactivate Drain Mode and unlock the drain solenoid, simultaneously press the Function and Enter Keys again.

Flow Test Mode

Activating Flow Test Mode opens the supply solenoid and allows water to pass to the manual supply valve. To activate Flow Test Mode, press and hold the Function Key for one second (L3 will ﬂash). To deactivate Flow Test Mode and allow the supply solenoid to close, press and hold the Function Key again for one second.

CAUTION

The sump drain line must be clear and draining to a safe location before using Flow Test Mode.

CAUTION

Be aware of the water level in the sump tank at all times when using the Flow Test Mode.

Indicating Lights

Three indicating lights are located across the top of the display to indicate the status of the Water Wizard™.

Light Status

Indicating

Light

On Off

Call for cooling

Drain

solenoid

open

CoolingonCooling

No call

for

cooling

Drain

solenoid

closed

off

Blinking (Long on, Short Off)

Call for

cooling.

Outdoor

temperature

lockout.

N/A

Supply

solenoid

locked closed

Blinking

(Short on,

Long Off)

N/A

Supply

solenoid

open. (Drain

solenoid

closed).

Flow test

mode active

Program Mode

Program Mode allows the user to view the Program Menu and edit the factory default settings. To access Program Mode and view the Program Menu press and hold the Enter key for three seconds. While viewing the Program Menu press the Up and Down keys to scroll through the Menu Options. To view the setting of the selected Menu Option, press the Enter key. To edit the setting, press the Up or Down key while viewing the setting. To save the setting and return to the Program Menu, press the Enter key. To return to the Program Menu without saving the change, wait 10 seconds. To exit Program Mode from the Program Menu, wait 10 seconds.

WARNING

Changing the default settings will significantly affect performance. Only change a setting after reading and understanding this entire manual.

WARNING

The Enter key must be pressed to save any changes made to a setting.

Modular Supply Make-Up Air Unit

Troubleshooting

Blower Does Not Operate

Proper supply power at

main disconnect

Yes

24 VAC between

terminals R and X?

Yes

24 VAC between

terminals G and X?

Yes

24 VAC across

terminals 3 and X?

Yes

24 VAC across

terminals 4 and X?

Check main voltage

(See Blower Start-Up Step #1)

Main Disconnect (DS1) Off

(Turn Main Disconnect DS1 On)

Primary fuses blown

(Replace fuses)

Main Transformer (TR1) Defective

(Replace transformer)

Supply Switch (S2) Off

(Turn Supply Switch (S2) On)

Fire System Contact (FSC) tripped/not installed

(Correct/Replace)

Supply Fan Overload (ST1 OL) tripped

(Reset and check motor amps. Reference Blower Start-Up #4)

Optional Exhaust Fan Interlocks (ST2-ST5) open

(Correct/Replace)

Yes

24 VAC across A2 and A1 on

supply contactor (ST1)

Yes

(Optional) Freeze Protection (RT4) Tripped

(Reset)

(Optional) Damper Limit Switch (DL1) holding

(Wait for actuator to open fully or adjust limit switch)

(Optional) Damper Limit Switch jumper missing

(Install jumper. Reference the unit’s ladder diagram for terminals)

Fan Relay (RF) is not energized

(Check for loose connection) (Repair or replace relay)

Broken fan belt

(Replace. Reference Maintenance section)

Defective motor or capacitor

(Repair/Replace)

Blown motor fuse

(Replace)

One or more legs of 3 phase is out

(Restore missing legs)

At this time the supply contactor (ST1) should pull in,

passing power to the supply motor

and the blower should start.

Modular Supply Make-Up Air Unit

Troubleshooting

Motor Overamps

Air volume too high?

Actual static pressure

lower than design?

Blower rotation correct?

Yes

Motor voltage correct?

Yes

Motor horsepower too low?

Yes

Adjust drives or increase external

static pressure as needed.

(Reference Blower Start-Up Step #5)

Yes

Adjust drives to reduce blower RPM.

(Reference Blower Start-Up Step #5)

Reverse blower rotation.

(Reference Blower Start-Up Step #2)

Provide proper power supply.

(Reference Blower Start-Up Step #1)

Yes

Resize motor.

Shorted windings in motor?

Yes

Everything is working

properly, consult factory.

Yes

Replace motor.

Modular Supply Make-Up Air Unit

Troubleshooting

Insufﬁcient Airﬂow

Damper(s) not fully opened?

System static losses too high?

Blower speed too low?

Filters dirty or clogged

Leaks in ductwork

Yes

Adjust damper linkage(s), or replace faulty actuator(s).

(Damper actuators may take a few minutes to open)

Yes

Reduce losses by improving ductwork.

Yes

Adjust drives as needed.

(Reference Blower Start-Up Step #5)

Yes

Clean or replace filters.

(Reference Filter Maintenance in the Maintenance section).

Yes

Repair leaks.

Belt slipping

Yes

Everything is working properly,

consult factory.

Too Much Airﬂow

Blower speed too high?

Filters not in place?

Insufﬁcient external static

pressure?

Yes

Replace or tighten belt.

(Reference V-Belt Maintenance in the Maintenance section)

Yes

Adjust drives as needed.

(Reference Blower Start-Up Step #5)

Yes

Install filters.

Yes

Everything is working properly,

consult factory.

Increase external static pressure.

Modular Supply Make-Up Air Unit

Troubleshooting

Excessive Noise or Vibration

Belts worn or loose?

Sheaves aligned?

Yes

Wheel unbalanced?

Bearings worn or need

lubrication?

Wheel rubbing on inlet?

Yes

Replace worn belts or tighten loose belts.

(Reference V-Belt Drive Maintenance in the Maintenance section)

Align sheaves.

(Reference V-Belt Drive Maintenance in the Maintenance section)

Yes

Clean and/or balance wheel(s).

Yes

Replace worn bearings or lubricate bearings as needed.

(Reference Bearing Maintenance in the Maintenance section)

Yes

Adjust wheel(s) or inlet.

At this time noise and vibration should

be at acceptable levels.

Modular Supply Make-Up Air Unit

Troubleshooting

Electric Heater Does Not Operate (optional)

Supply fan must be on for heater to operate

24 VAC between

terminals W1 and X?

Yes

24 VAC between

terminals 22 and 21?

Yes

24 VAC between

terminal A2 on heat relay (RH)

and X?

Yes

24 VAC between

terminals T1 and 21?

Yes

24 VAC between

terminals I and 21?

Yes

Heat Switch (S4) Off

(Turn Heat Switch (S4) On)

Heat Switch not wired

(Wire Heat Switch (S4))

Main Transformer (TR2) defective

(Replace transformer)

(Optional) Inlet Air Sensor (TS4) holding

(Adjust (TS4) setting. Reference Blower Start-Up Step #6)

Heat Relay (RH) is not energized

(Check for loose connections). (Repair or replace Heat Relay (RH))

Pressure Differential Switch (PDS) open

(Check on cause of control loss)

Automatic and/or Manual Reset Cutouts (A and M) tripped

(Reset/Replace Automatic and/or Manual Reset Cutouts (A and M))

(Check on cause of control loss)

At this time the heater should be energized.

(The heating elements will not be on if the leaving air

temperature is above its set point on the Remote Adjuster (RA))

Modular Supply Make-Up Air Unit

Troubleshooting

Evaporative Cooler does not Operate (Recirculating pump)

Supply fan must be on for cooler to operate

24 VAC between terminals

Y1 and X

Yes

24 VAC between terminal A2 on

Cooling Relay (RC) and X

Yes

115 VAC between terminals

102 and 101

Yes

115 VAC between terminal

114 and 101

Cool Switch (S4) off

(Turn Cool Switch (S4) on)

Cool Switch not wired

(Wire Cool Switch (S4))

Optional Inlet Air Sensor (TS4) holding

(Adjust TS4 setting. Reference Blower Start-Up Step #6)

Cooling Transformer (TR4) defective

(Replace transformer)

Cooling Relay (RC) is not energized

(Check for loose connections)

(Repair or replace relay)

Water Blows through Evaporative Cooler

Are the headers in place and

located near the entering

air side of the media?

Yes

Water supply greater than

evaporation and bleed-off rate?

Air velocity greater than

speciﬁed?

Yes

At this time the evaporative cooler pumps should be on

Replace headers and/or move the headers.

(Reference Evaporative Cooler Start-Up Step #1)

Yes

Use the main supply valve to reduce the supply of water.

Yes

Reduce the air velocity through the media.

(Reference Blower Start-Up Step #5)

Modular Supply Make-Up Air Unit

At this time the evaporative cooler should be

operating without water blowing through.

Troubleshooting

Water Wizard™ — Improper Water Supply

NOTE

If the water supply is too low, the media will continuously appear dry.

NOTE

If the water supply is too high, the media will be saturated and excessive water will be draining from the sump tank.

NOTE

Some water drainage is desired to keep the media flushed, but it should be minimized to utilize the Water Wizard™.

1. Adjust the Manual Supply Valve. Adjust the manual supply valve (refer to Start-Up, Water Wizard™). If the recommended water pressure does not provide enough water, increase the pressure until the desired water supply is achieved. If the recommended water pressure provides too much water, decrease the water pressure until the desired water supply is achieved.

4. Exit Program Mode. After 15 seconds of idle time the controller will automatically exit Program Mode.

NOTE

Changing the On Time Factor by (1) will change the water supply by approximately 3%.

IMPORTANT

The enter key must be pressed to save the new On Time Factor.

CAUTION

Only proceed to Steps 2 and 3 if Step 1 does not correct the problem.

2. Enter Program

Mode. Press and

hold the Enter key for three seconds to enter Program Mode. The display will read “Pro” when Program Mode is active.

Program Display

3. Adjust the On Time Factor. While in the Program Menu, use the Up and Down keys to navigate through the menu options until “ont” is displayed.

With “ont” displayed,

press the Enter key to access the setting.

With the setting

displayed, use the Up and Down keys to adjust the setting as

On Time Factor Display

needed.

Increase the factor to increase the water supply or

decrease the factor to decrease the water supply.

Press the Enter key to save the new On Time Factor

and return to the Program Menu.

Modular Supply Make-Up Air Unit

Maintenance - Routine

CAUTION

Lock-out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit.

V-Belt Drives

V-belt drives must be checked on a regular basis for wear, tension, alignment, and dirt accumulation.

Check the tension by measuring the deﬂection in the belt as shown below.

Check the alignment by using a straight edge across both sheaves as shown below.

IMPORTANT

Premature or frequent belt failures can be caused by improper belt tension, or misaligned sheaves.

Abnormally high belt tension or drive misalignment will cause excessive bearing loads and may result in failure of the fan and/or motor bearings. Abnormally low belt tension will cause squealing on start-up, excessive belt flutter, slippage, and overheated sheaves.

IMPORTANT

Do not pry belts on or off the sheave. Loosen belt tension until belts can be removed by simply lifting the belts off the sheaves.

IMPORTANT

Snow Accumulation

Clear snow away from roof mounted units. Keep the snow clear of the intake and access doors.

Motors

Motor maintenance is generally limited to cleaning and lubrication (where applicable).

Cleaning should be limited to exterior surfaces only. Removing dust and grease build-up on the motor assures proper motor cooling.

Motors supplied with grease ﬁttings should be greased in accordance with the manufacturer’s recommendations.

IMPORTANT

Do not allow water or solvents to enter the motor or bearings. Motors and bearings should never be sprayed with steam, water or solvents.

IMPORTANT

Greasing motors is only intended when ﬁttings are provided. Many motors are permanently lubricated, requiring no additional lubrication.

Wheels

Wheels require little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel causing imbalance. When this occurs the wheel and housing should be cleaned to assure proper operation.

When replacing V-belts on multiple groove drives, all belts should be changed to provide uniform drive loading.

IMPORTANT

Do not install new belts on worn sheaves. If the sheaves have grooves worn in them, they must be replaced before new belts are installed.

Deﬂection =

Belt Span

Belt Tension

Belt Span

Drive Alignment

Modular Supply Make-Up Air Unit

Bearings

The bearings for manufacturer fans are carefully selected to match the maximum load and operating conditions of the speciﬁc class, arrangement and fan size. The instructions provided in this manual and those provided by the bearing manufacturer will minimize any bearing problems.

IMPORTANT

Lubricate bearings prior to periods of extended shutdowns or storage and rotate shaft monthly to aid in corrosion prevention. If the fan is stored more than three months, purge the bearings with new grease prior to start-up.

Recommended Bearing Lubrication Schedule (in Months*)

Fan

RPM

25066666

50066654

75065433

1000 53211

1250 53211

1500 52110.5

2000 5 1 1 0.5 0.25

*Suggested initial greasing interval is based on 12 hour

per day operation and 150°F (66°C) maximum housing temperature. For continuous (24 hour) operation, decrease greasing interval by 50%

• If extended grease lines are present, relubricate while in operation, only without endangering personnel.

• For ball bearings (operating) relubricate until clean grease is seen purging at the seals. Be sure not to unseat the seal by over lubricating.

• For ball bearings (idle) add 1-2 shots of grease up to 2 inch bore size, and 4-5 shots above 2 inch bore sizes with a hand grease gun.

• For roller bearings add 4 shots of grease up to 2 inch bore size, and 8 shots for 2-5 inch bore size with a hand grease gun.

• Adjust relubrication frequency based on condition of purged grease.

• A high quality lithium based grease conforming to NLGI Grade 2 consistency, such as those listed here:

Mobil 532 Mobilux #2

⁄2 - 1 11⁄8 - 11⁄2 15⁄8 - 17⁄8 115⁄16 - 23⁄16 27⁄16 - 3

Bearing Bore Size (inches)

Texaco Multifak #2 Texaco Premium #2

B Shell Alavania #2 Exxon Unirex #2

Filters

Filter maintenance is generally limited to cleaning and replacement.

If aluminum mesh ﬁlters are installed, they can be washed in warm soapy water.

An adhesive spray can be added to aluminum mesh ﬁlters to increase their efﬁciency.

If disposable ﬁlters are installed, they can be checked by holding up to a light source. If light cannot pass through the ﬁlter, it should be replaced.

IMPORTANT

When reinstalling filters, be sure to install them with the airflow in the correct direction. An airflow direction arrow is located on the side of the filters.

IMPORTANT

Replacement filters should be from the same manufacturer and the same size as the original filters provided with the unit.

Evaporative Coolers

The media should be periodically brushed lightly with a soft bristle brush in an up and down motion while ﬂushing with water. This aids in reducing the amount of mineral build-up.

For large amounts of mineral build-up, clean or replace the media and increase the water bleed-off or ﬂush rate.

The cooling media has a useful life of 3 to 5 years depending on the water quality and the bleed-off or ﬂush rate.

IMPORTANT

When reinstalling the evaporative media, make sure that it is installed correctly. Reference the drawing shown below.

IMPORTANT

Replacement media should be from the same manufacturer and be the same size as the original media provided with the unit.

45º

Entering Air

Media Orientation

Modular Supply Make-Up Air Unit

Leaving Air

15º

Cooling Coils

Maintenance - Fall

WARNING

Repair and replacement of the coil and the connecting piping, valves, etc., should be performed by a qualified individual.

Inspect the coil for signs of corrosion and/or leaks. Repair any leaks as required.

Inspect the coil’s surface for foreign material. If the coil surface needs cleaning, clean the coil from the leaving air-side so that foreign material will be washed out of the coil rather than pushed farther in.

Inspect and clean the drain pan to prevent the growth of algae and other organisms.

Chilled Water Coils

IMPORTANT

Be sure to read and follow the manufacturer’s recommendations before using any cleaning fluid.

CAUTION

Caution should be used to avoid injury when venting the coil. High pressure and/or high temperature fluids can cause serious injuries.

Test the circulating ﬂuid for sediment, corrosive products and biological contaminants. Make the necessary corrective measures.

Maintain adequate ﬂuid velocities and proper ﬁltering of the ﬂuid.

If automatic air vents are not utilized, periodic venting of the coil is recommended to remove accumulated air.

Evaporative Coolers

The water should be shut off and all the lines drained when the outside temperature drops below 45°F.

Remove drain plugs for the winter.

Clean all interior parts of any mineral deposits or foreign materials that may have built-up during the cooling season.

Replace any worn or non-functioning parts.

Winterizing Chilled Water Coils

During the winter, chilled water coils need to be protected against freezing. Manufacturer recommends protecting the coils by either blowing-out the coils or by ﬂushing the coils.

Blowing-Out Coils

1. Close valves on the supply and return lines.

2. Open drain valves and/or drain plug. Remove vent plug to allow coil to drain faster.

3. After coil is fully drained, connect a blower to the caps. Do not connect the blower to the air vent or drain plug.

4. Close the vent plug on the header that the blower is connected to. Open the drain valve or cap on the other header.

5. Turn on blower for 30 minutes. Place mirror at discharge. If the mirror fogs up, repeat procedure until no fog appears on the mirror.

6. After drying the coil, wait a few minutes then repeat Step #5.

7. Leave drains open and do not install plugs until beginning of cooling season.

Flushing Coils

Manufacturer recommends the use of inhibited glycol (such as propylene or ethylene) to ﬂush water coils to protect against freezing. Additionally, the use of inhibited glycol provides corrosion protection.

The table below indicate the percentage of glycol required to prevent freezing in a coil at a given outdoor air freeze point. Completely ﬁll coil with solution. Drain coil. Residual glycol ﬂuid per these concentrations can be left in the coil without concern of freezing. Recovered ﬂuid can be used to ﬂush other coils.

Modular Supply Make-Up Air Unit

Percent of

Ethylene

Glycol

by Volume

0320 0320

10 25 -4 10 26 -3

20 16 -9 20 19 -7

30 3 -16 30 8 -13

40 -13 -25 40 -7 -22

50 -34 -37 50 -28 -33

60 -55 -48 60 -60 -51

Freeze Point

°F ºC °F ºC

Percent of

Propylene

Glycol

by Volume

Freeze Point

Reference

Typical Control Center Layout

15 17

1. Primary Fuses — provides proper fusing to low voltage transformer.

2. Low Voltage Transformer — provides low voltage to controls and optional evaporative cooling controls.

3. Low Voltage Fuse — provides proper fusing to controls and optional evaporative cooling controls.

4. Control Terminal Block — provides wiring access to controls.

5. Building Freeze Protection Timer (optional)— prevents the discharge of cold air into the building.

6. Fan Relay — allows power to pass to energize motor starter.

7. Supply Motor Starter — 24 volt magnetic contacts for starting supply motor.

8. Supply Overload — provides electronic overload protection to supply motor.

9. Auxiliary Contact (optional) — provides one normally closed and one normally open contact for other equipment.

10. Exhaust Fuses (optional) — provides proper fusing for exhaust fan motor(s).

11. Exhaust Motor Starter (optional) — 24 volt magnetic contacts for starting exhaust motor.

12. Exhaust Overload (optional) — provides electronic overload protection to exhaust motor.

13. Inlet Air Sensor (optional) — outdoor air stat that automatically controls the cooling based on outdoor air temperature.

14. Cooling Relay (optional) — allows power to pass to cooling controls.

15. Reset Timer (optional) — resets cooling system to run a time interval.

16. Auto Drain Relay (optional) — assures supply pump does not operate during drain interval. Allows pump to operate in cooling mode.

17. Cooling Timer (optional) — allows for automatic draining of the evaporative cooling system based on time schedule.

18. Dirty Filter Switch (optional) — monitors ﬁlter pressure drop, turns on indicating light when pressure drop is above ﬁeld adjustable set point.

Common

Dirty Filter Switch

Normally Open

Normally Closed

CCW to Decrease Trip Point CW to Increase Trip Point

Negative Pressure

after the filters

Positive Pressure

before the filters

Modular Supply Make-Up Air Unit

Maintenance Log

Date ___________________Time _____________ AM/PM

Notes: ___________________________________________

_________________________________________________

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Modular Supply Make-Up Air Unit

Maintenance Log

Date ___________________Time _____________ AM/PM

Notes: ___________________________________________

_________________________________________________

Date ___________________Time _____________ AM/PM

Notes: ___________________________________________

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Date ___________________Time _____________ AM/PM

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Date ___________________Time _____________ AM/PM

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Modular Supply Make-Up Air Unit

Our Commitment

As a result of our commitment to continuous improvement, Greenheck reserves the right to change speciﬁcations without notice.

Speciﬁc Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties.

Greenheck catalog MSX provide additional information describing the equipment, fan performance, available accessories, and speciﬁcation data.

Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com

AMCA Publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans, provides additional safety information. This publication can be obtained from AMCA International, Inc. at www.amca.org.

Greenheck MSX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual