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

+ 28 hidden pages