Greenheck DG0H10 Installation Manual

Part # 464043

**WARNING**

Disconnect and secure all electrical power to the

“OFF” position prior to inspection or servicing.

Failure to comply with this safety precaution

could result in serious injury or death.

**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.

FOR YOUR SAFETY

If you smell gas

1. Open windows

2. Don’t touch electrical switches

3. Extinguish any open flames

4. Immediately call your gas supplier

Report any damaged equipment to the shipper immediately!

All units are shipped on a skid or packaged to minimize damage during shipment. The transporting carrier has the responsibility of delivering all items in their original condition as received from Greenheck. The individual receiving the equipment is responsible for inspecting the unit for obvious or hidden damage, recording any damage on the bill of lading before acceptance and filing a claim (if required) with the final carrier. Some accessory items are stored inside the unit during shipping. Care must be taken during installation to prevent damage to units.

FOR YOUR SAFETY

The use and storage of gasoline or other

flammable vapors and liquids in open

containers in the vicinity of this appliance

is hazardous.

**WARNING**

Improper installation, adjustment, alteration,

service or maintenance can cause property

damage, injury or death. Read the installation,

operating, and maintenance instructions

thoroughly before installing or servicing this

equipment.

MaintenanceTroubleshootingOperation

Start-UpInstallation

Reference

MODEL DG / DGX (Direct Spark Ignition)

Make-Up Air Unit

Installation, Operation and Maintenance Manual

TABLE OF CONTENTS

Installation

Clearance to Combustibles &

Service Clearances . . . . . . . . . . . . . . . .2

Unit - Indoor . . . . . . . . . . . . . . . . . . . . . . .3

Unit - Arrangement DB/HZ . . . . . . . . . . . .4

Unit - Arrangement DBC . . . . . . . . . . . .5-6

Evaporative Module . . . . . . . . . . . . . . . . . .7

Electrical Wiring . . . . . . . . . . . . . . . . . . .8-9

Direct Gas Piping . . . . . . . . . . . . . . . .10-11

Evaporative Cooler Piping . . . . . . . . .12-13

Water Wizard™ . . . . . . . . . . . . . . . . . . . .14

Direct Expansion (DX) Coil Piping . . .15-16

Chilled Water Coil Piping . . . . . . . . . . . .17

Building Pressure Control . . . . . . . . . . . .18

Start-Up

Blower . . . . . . . . . . . . . . . . . . . . . . . . .19-20

Direct Gas . . . . . . . . . . . . . . . . . . . . . .21-25

Evaporative Cooling . . . . . . . . . . . . . . . .26

Water Wizard™ . . . . . . . . . . . . . . . . .27-28

Operation

VAV and Recirculation Units . . . . . . .29-30

Electrical . . . . . . . . . . . . . . . . . . . . . . . . .31

Water Wizard™ . . . . . . . . . . . . . . . . . . . .32

Troubleshooting

Blower . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Heater . . . . . . . . . . . . . . . . . . . . . . . . .34-35

Evaporative Cooling . . . . . . . . . . . . . . . .36

Water Wizard™ . . . . . . . . . . . . . . . . . . . .37

Vibration . . . . . . . . . . . . . . . . . . . . . . . . . .38

Reference

Gas Train Layout . . . . . . . . . . . . . . . . . . .44

Control Center Layout . . . . . . . . . . . . . . .45

Dirty Filter Switch . . . . . . . . . . . . . . . . . .45

Start-Up Checklist . . . . . . . . . . . . . . . . . .46

Maintenance Log . . . . . . . . . . . . . . . . . . .47

Warranty . . . . . . . . . . . . . . . . . .Backcover

Maintenance

Routine . . . . . . . . . . . . . . . . . . . . . . . .39-41

Fall . . . . . . . . . . . . . . . . . . . . . . . . .42-43

STORAGE

When a unit is not going to be in service for an extended period of time, certain procedures should be followed to keep the unit in proper operating condition:

• Plug all piping

• Rotate fan wheel monthly and purge bearings once every one to three months (depending on environment).

• Energize fan motor once every three months

• Store belts flat to keep them from warping and stretching

• Store unit in location without vibration

• Cover unit with tarp to protect from dirt and moisture

• After storage period, purge grease before putting fan into service

NOTE!

Do not cover unit with a black tarp, this would

promote condensation.

NOTE!

Improper storage which results in damage to the

unit will void the warranty.

Clearance to Combustibles / Service Clearances

Floor Top Sides Ends

Insulated Units

0 inches 0 inches 0 inches 0 inches

Non Insulated Units

0 inches 6 inches 6 inches 6 inches

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

42 inches on the controls side of the unit

Housing 35 and higher

48 inches on the controls side of the unit

Clearances for component removal may be greater than the service clearances listed.

Installation - Indoor Installation

Installation

Step 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.

Step 2 Install Unit

Using sheet metal screws, attach the weatherhood/thru-wall/filter section to the blower/burner section. The flange on the weatherhood/thru-wall/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 Greenheck 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.

Step 3 Seal Wall Opening

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

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

Unit

Supports

Ceiling

Supports

Hangers

Ductwork

Indoor Mounting

Sealing Wall Opening

Step 6 Seal Weatherhood Seam

Using an appropriate sealant, seal the seam between the weatherhood and the unit.

Step 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.

Step 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.

Step 2 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 all local codes. Reference the CAPS submittal for ductwork sizes.

Step 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/equipment support(s).

Step 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 instructions for the optional evaporative cooling module.

Supply Air Ductwork (Arrangement DB only)

Optional Return Air Duct (Arrangement HZ and DB)

Sealant

Installation - Arrangement DB / HZ

Installation

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.

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 support

for the ductwork.

Metal Cover

Equipment Support

Roof Curb

Ductwork

Setting Unit

Complete Rooftop Installation

Step 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.

Step 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.

Installation - Roof Mounted Unit Arrangement DBC

Installation

Step 4 Apply Sealant

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

NOTE!

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 support

for the ductwork.

Step 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.

Curb and Equipment Support

Combination Extension

Ductwork

Sealing Ductwork

Roof Curb

Metal Cover

Equipment Support

Exhaust

Supply

1 inch Inside Flange

Supply Ductwork by Others

Exhaust Duct Installed

Sealant

Supply Duct with Duct Adapter Installed

Exhaust Ductwork by Others

Model CUBE Exhaust Fan

Step 5 Install Exhaust Fan

Fasten exhaust fan to curb extension with selftapping sheet metal screws.

Step 6 Install Exhaust Options

Install optional Greenheck hinge kit with restraining cables and grease trap with drain connection.

Step 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).

Installation - Roof Mounted Unit Arrangement DBC

Step 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 installation instructions for the optional evaporative cooling module.

Installation

NOTE!

Installing the exhaust fan prior to the supply unit

will allow for easier installation of options.

NOTE!

The use of all lifting lugs and a set of spreader

bars is mandatory when lifting unit.

Step 9 Seal Weatherhood Seam

Using an appropriate sealant, seal the seam between the weatherhood and the unit.

NOTE!

Some units come with the weatherhood attached

and step 8 may not apply.

Installing Exhaust Fan

Installing Supply Unit

Complete Combination Installation

NOTE!

When mounting the evaporative cooler, it is important that it is

level to ensure proper operation and water drainage.

Installation - Evaporative Module (Optional)

Installation

Step 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.

Step 2 Apply Sealant

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

Step 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.

Step 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 reinstall the access panel.

NOTE!

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

NOTE!

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

cooling module.

Metal Cover

Equipment Support

Sealant

Equipment Support

Sealant

Placing Evaporative Module

Securing Evaporative Module

Step 4 Wire the Optional Convenience Outlet

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

Step 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. See the control center layout in the reference section for main disconnect and grounding lug(s) locations.

Installation - Electrical Wiring

CAUTION!

If replacement wire is required, it must have a

temperature rating of at least 105°C, except for

energy cut-off or sensor lead wire which must be

rated to 150°C.

CAUTION!

Any wiring deviations may result in personal injury or property damage. Greenheck is not responsible

for any damage to, or failure of the unit caused by incorrect final wiring.

Installation

DANGER!

High voltage electrical input is needed for this

equipment. This work should be performed by a

qualified electrician.

IMPORTANT!

All wiring should be done in accordance with the

latest edition of the National Electrical 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.

Step 1 Determine the Size of the Main

Power Lines

The units 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.

Step 2 Provide the Opening(s) for the

Electrical Connections

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

Voltage, Hertz,

and Phase

Unit’s MCA

IMPORTANT!

Before connecting power to the unit, read and understand the following instructions and wiring

diagrams. Complete wiring diagrams are attached to the inside of the control center door(s).

IMPORTANT!

Greenheck’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.

Electrical Nameplate

SUP HP

MCA

EXH HP

MOP

VOLTS HZ PH

Step 5 Wire the Accessories

Reference the ladder diagram on the inside of the control center door for correct wiring of the following accessories:

Step 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.

Step 7 Check Recirculation / VAV

Operation

Two Position Damper Control

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.

Two Speed

Turn the fan speed switch on the remote control panel to each positions and confirm that the fan speed adjusts accordingly.

Potentiometer Control

To test potentiometer operation, turn the potentiometer to the two extremes. With 80/20 recirculation, confirm that the return air damper fully opens and fully closes. The damper actuator may take a few minutes to open or close. With variable volume, make sure the fan goes to maximum and minimum speed.

Building Pressure Control

See Installation - Building Pressure control for building pressure set-up and operation check.

External Signal Control

See Operation-VAV and Recirculating units for additional information. External 2-10 VDC / 4-20 mA signal required.

NOTE!

Large evaporative coolers may require a

separate power supply.

NOTE!

TSCP has number-to-number wiring.

NOTE!

Wiring to the Selectra Stat should be in separate

conduit or run with shielded cable.

Installation - Electrical Wiring

Installation

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.

NOTE!

Blower Start-Up, steps 1-4 should be performed

before the blower is run.

• Selectra Stat

• Room Override

• Blower Switch

• Heat Switch

• Indicating Lights

• Dirty Filter Indicator

• TSCP

• KSCP

(OPTIONAL)

BLOWER

DIRTY FILTERS

MAIN VALVES

EXHAUST

SUPPLY

HEAT

(OPTIONAL)

GREENHECK

PHOTOHELIC

(OPTIONAL)

BLOWER

DIRTY FILTERS

MAIN VALVES

EXHAUST

SUPPLY

HEAT

(OPTIONAL)

GREENHECK

(OPTIONAL)

BLOWER

DIRTY FILTERS

MAIN VALVES

RECIRCULATION

EXHAUST

SUPPLY

HEAT

(OPTIONAL)

2-Position Damper Control

Potentiometer Control

Building Pressure Control

Installation - Direct Gas Piping

Installation

Step 1 Determine the Supply Gas Requirements

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

IMPORTANT!

All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code

ANSI/Z223.1 and any local codes that may apply. In Canada, the equipment shall be installed in

accordance with the Installation Code for Gas Burning Appliances and Equipment (CGA B149) and

Provincial Regulations for the class. Authorities having jurisdiction should be consulted before

installations are made.

WARNING!

All components of this or any other gas fired heating unit must be leak tested prior to placing the unit

into operation. A soap and water solution should be used to perform this test. NEVER test for gas

leaks with an open flame.

WARNING!

If pressure testing in excess of 1/2 psig (3.5

kPa), the heater and manual shutoff valve must

be disconnected from the supply gas line.

WARNING!

If pressure testing at or below 1/2 psig (3.5 kPa),

the heater must be isolated from the supply gas

line by closing its manual shutoff valve.

IMPORTANT!

All piping should be clean and free of any foreign

matter. Foreign material entering the gas train

can damage the valves, regulators and burner.

“W.C.

PSI

“W.C.

MAX BTU/HR BTU/H MAX

NORMAL MANIFOLD PRESSURE PRESSION D’ADMISSION NORMALE

MIN GAS PRESSURE PRESSION DE GAZ

MIN BURNER PRESSURE DROP PERTE MIN DE PRESSION DANS LE BRULEUR

TYPE OF GAS NATURE DU GAZ

MIN BTU/HR BTU/H MIN

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

MAX BURNER PRESSURE DROP PERTE MAX DE PRESSION DANS LE BRULEUR

MAX GAS PRESSURE PRESSION DE GAZ MAX

DESIGN ∆T ∆T NORMALE

EQUIPPED FOR

CONCU POUR

SCFM

“W.C.

EXTERNAL STATIC PRESSURE

PRESSION STATIQUE EXTERIEURE

AGAINST

CONTE

Maximum gas

pressures

Minimum gas

pressure for

maximum output

Type of Gas

IMPORTANT!

Do NOT connect the unit to gas types other than

what is specified and do NOT connect the unit to

gas pressures that are outside of the pressure

range shown on the label.

Direct Gas Nameplate

Installation - Direct Gas Piping

Installation

Controls

Gas Cock

From

Gas

Supply

6 in. Trap

1/8 in. Plugged Tap

Ground Joint Union

Step 3 Connect the Supply Gas Line

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

Step 2 Install Additional Regulator if

Required

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

Step 4 Test the System for Leaks

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

WARNING!

The factory piping has been checked for leaks,

but should be rechecked due to shipping and installation.

WARNING!

NEVER test for a gas leak with an open flame.

NOTE!

The regulator located inside the unit is used to

adjust the unit’s maximum output temperature.

Supply Gas Line

Installation - Evaporative Cooling Piping (Optional)

Evaporative Cooling with Recirculating Pump

Installation

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.

Step 1 Install the Water Supply Line

Step 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. Refer to piping diagram above.

Step 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.

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.

IMPORTANT!

All supply solenoids, valves and all traps must be below the roofline or be otherwise protected from

freezing.

6 in. min.

Supply Line

Overflow

Trap

Drain Line Valve (Normally Open)

Drain Line

Supply Line Valve (Normally Closed)

Recirculating Evaporative Piping

Drain Trap

Installation - Evaporative Cooler Piping (Optional)

Installation

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 you local code requirements for

proper installation of this type of system.

Step 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 as shown above. Install the 1/4 in. normally open solenoid (Valve B) between the supply line and the drain line as shown above.

Step 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. Refer to piping drawing above.

Evaporative Cooling with Auto Drain and Fill

Step 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.

6 in. min.

Auto-Drain and Fill Evaporative Piping

Drain Trap

Auto Drain & Flush Valves (when provided by Greenheck)

Assembly

Number

GFC

Part Number

ASCO

Part Number

Solenoid Type

De-Energized

Position

Diameter Quantity

852178

461262 8210G2 Supply Closed 1/2 inch 1

461263 8262G62 Supply Line Drain Open 1/4 inch 1

461264 8210G35 Sump Drain Open 3/4 inch 1

Supply Line

VALVE B

Supply Line Drain Solenoid

(Normally Open)

Sump Overflow

Sump Drain

VALVE C

Sump Drain Solenoid

(Normally Open)

VALVE A

Supply Solenoid

(Normally Closed)

Drain Line

Part numbers subject to change.

Installation

Evaporative Cooling with the Water Wizard

Installation - Water Wizard™ (Optional)

Step 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.

Step 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 AI2 and AIC on the terminal strip in the unit’s control center.

Step 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 roofline.

Step 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.

CAUTION!

Any wiring deviations may result in personal injury or property damage. Greenheck is not

responsible for any damage to, or failure of the

unit caused by incorrect final wiring.

NOTE!

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

NOTE!

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

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.

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.

Water Wizard Valves (when provided by Greenheck)

Unit

Model

Assembly

Number

GFC

Part Number

ASCO

Part Number

Solenoid

Type

De-Energized

Position

Diameter Quantity

DG0H10/H20

DGX-H12/H22

DGX-H30 (<9000 cfm)

852370

461262 8210G2 Supply Closed 1/2 inch 1

383086 8210G34

Supply Line

Drain

Open 1/2 inch 1

DG-H30

DGX-H32 (≥9000 cfm)

852371

383088 8210G9 Supply Closed 3/4 inch 1

383086 8210G34

Supply Line

Drain

Open 1/2 inch 1

Supply Line Drain Solenoid

(Normally Open)

Supply Solenoid

(Normally Closed)

Manual

Supply Valve

Pressure

Gauge

To Media

Sump

Drain

Roof

Line

Trap

Water Wizard Installation

Factory

Installed

Field

Installed

Part numbers subject to change.

Installation - Direct Expansion (DX) Coil Piping (Optional)

Installation

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.

Hot Gas Bypass

(by others)

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

(by others)

Installation with Hot Gas Bypass

Step 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.

NOTE!

If a hot gas bypass kit was provided by others,

refer to the manufacturer’s instructions

Nozzle Placement

Step 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.

Distributor Access Panel

Retainer Ring

Nozzle Distributor

+ 33 hidden pages