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DIGITAL HEAVY DUTY 7500W

ELECTRIC UTILITY HEATER

CZ230ER

DESCRIPTION

Electric utility heaters are designed to meet a variety of heating

requirements. Heat output ranges from to 21,331 BTUs per

hour to 25,589 BTUs per hour. Features horizontal and vertical

flow, built-in thermostat and high limit thermal cutout.

SPECIFICATIONS

General Safety Information

Read and understand installation and

operation instructions and observe all safety instructions before

using this heater.

1. Use copper wire only for supply connections. The wire

should be properly sized and insulated. Do not use

aluminum wire with this installation. Wires should be

suitable for at least 167°F (75°C).

2. Heater air flow must be directed parallel to, or away from

adjacent wall.

3. Observe wall, floor, and ceiling clearance requirements.

4. All wiring must conform to national and local electrical

codes in the United States and the heater must be ground-

ed as a precaution against possible electrical shock. Heater

circuit must be protected with proper fuses.

5. This heater is hot when in use. To avoid burns, do not let

bare skin touch hot surfaces. Keep combustible materials,

such as furniture, pillows, bedding, papers, clothes, etc. and

curtains at least 3 feet (0.9 m) from the front of the heater

and keep them away from the sides and rear.

6. Do not use outdoors.

7. This heater is not intended for use in bathrooms, laundry

areas and similar indoor locations.

8. Extreme caution is necessary when any heater is used by

or near children or invalids and whenever the heater is

left operating and unattended.

9. Do not operate any heater after it malfunctions.

Disconnect power at service panel and have heater

inspected by a reputable electrician before reusing

10. Do not insert or allow foreign objects to enter any

ventilation or exhaust opening as this may cause an

electric shock or fire, or damage the heater.

11. To prevent a possible fire, do not block air intakes or

exhaust in any manner.

12. Use this heater only as described in this manual. Any

other use not recommended by the manufacturer may

cause fire, electric shock, or injury to persons.

13. The Mounting structure and the anchoring hardware must

be capable of reliably supporting the weight of the heater

and, if used, the mounting bracket.

14. All electrical power must be disconnected and the main

service box must be locked before inspection, cleaning or

servicing the heater. This is a precaution to prevent

serious shock.

15. This heater is not suitable for use in hazardous locations

as defined by the national fire protection association

(NFPA) in the United States. This heater has hot and

arcing (sparking) parts inside. Do not use in areas where

gasoline, paint, or flammable liquids are used or stored.

16. This heater is not suitable for use in corrosive

atmosphere such as marine, greenhouses or chemical

storage areas.

17. Do not install closer than 8 inches to a vertical surface.

Do not install less than 6 feet from the floor.

18.

SAVE THESE INSTRUCTIONS

Improper installation or failure to follow the

procedures outlined in this instruction manual can result in

serious electrical shock.

LOCATING HEATER

Install heater out of traffic areas maintaining clearances

stated in Figure 2. The direction of air flow should not be

restricted (ie: by columns or machinery) and the air flow

should wipe exposed walls, rather than blowing directly at

them. When more than one heater is used in an area, the

heaters should be arranged so that the air discharge of each

heater supports the air flow of the others to provide best

circulation of warm air, as indicated in Figure 3.

WARNING

Figure 3

Black border shows

page size and should

not print

Refer to Figure 4a and 4b.

1. Locate a stud in the ceiling joist.

2. Remove the mounting bracket from the heating unit by

loosening bracket thumb screws.

3. Drill a ¼" pilot hole in ceiling joints. Place a washer on

screws before inserting through the holes in the mounting

bracket, and screw them securely into a ceiling joist.

NOTE: If you want to swivel the heater either to the right or

left, adding a washer to both sides of the bracket is recom-

mended. A longer Lag bolt may be required to properly

secure the unit (see 4a).

4. Tighten screws enough to securely hold heating unit with air

flow pointed in proper direction.

HANGING THE HEATER

1. Attach the heating unit to the mounting bracket.

2. Lift the heater up and into the mounting bracket.

3. Align the bracket screws with the keyholes slots in the

mounting bracket.

4. If the heater is to be tilted, It must be positioned in the

keyholes slots (see Figure 5)

5. Tighten the bracket screws with a wrench so the unit is

securely suspended horizontal or vertical level.

WASHER

BRACKET

3/8" DIAMETER

LAG BOLT

WASHER

BRACKET

3/8" DIAMETER

LAG BOLT

Figure 4a - Single- Screw Mounting

Figure 4b - Double-Screw Mounting

Installation

MOUNTING THE BRACKET

Figure 5

3. Pull enough properly sized wire through cable connector

and connect the wire to the power block located in the base

of the heater (see Figure 7).

4. Turn on the power at the main service.

OPERATION TEMPERATURE SETTING

1. This heater is designed to maintain a comfortable room

temperature.

2. When the heater is turned on by pressing the power button, it

will operate on HIGH setting (7500 W) continuously. Press the

MODE button on either the unit or remote to change the heat

setting to LOW (6250 W). The fan will start running about 10

seconds after initial start to push the heat out.

3. The temperature setting can be adjusted between 45°F (7°C)

to 95°F (35°C). To change the temperature, press the TEMP+

or TEMP- buttons on either the unit or the remote.

4. The temperature display will blink while it is being adjusted.

When the desired temperature is reached, it will take about

5 seconds to accept the setting. Once the display stops

flashing, the room temperature will reappears on the LED

screen to indicate the desired temperature is set.

5. While the temperature setting is in either LOW or HIGH mode,

the unit will stay in this mode, cycling on and off to maintain

the set temperature. The heater will reach the set temperature

faster in HIGH setting in comparison to LOW setting.

6. Once the unit is turned off, the fan will continue to run to cool

down the unit and there will be a 60 seconds countdown on

the digital display.

NOTE: The first time you operate the unit, it may smoke slightly.

This is due to residual cleaning agents used to clean the

element when the heater is manufactured. This is normal and

does not indicate a problem with the unit. This condition will stop

after the heater has been in operation for a few minutes.

TIMER FUNCTION

The Timer function allows you to set the length of operation from

1 to 12 hours. Each time the timer button is pressed the length

of operation will increase 1 hour. The duration the timer is set for

will be displayed on the LED screen in hour increments.

TO TURN THE TIMER FUNCTION OFF: Press the timer Button

continuously until the LED screen displays "0".

NOTE: The timer function is not an excuse to leave the heater

unattended.

SAFETY INSTRUCTIONS:

• This heater is hot when in use. To avoid burns, do not let

bare skin touch hot surfaces. If provided, use handles when

moving this heater. Keep combustible materials, such as

furniture, pillows, bedding, papers, clothes, and curtains at

least 3 feet (0.9 m) from the front of the heater and keep them

away from the sides and rear.

• This heater is not intended for use in bathrooms, laundry

areas and similar indoor locations. Never locate heater where

it may fall into a bathtub or other water container.

• This heater is designed to be directly wired to 240 volt

electric power. Never use with an extension cord or relocatable

power tap (outlet/power strip).

Figure 8 Rotate

FAN AND MOTOR

PROTECTIVE

GRILLE

WARNING

HEAT SETTING WATTS VOLTS PHASE AMPS BTU/HOUR

High 7500W 240V,60Hz 1 31.3 25,589

Low 6250W 240V,60Hz 1 26.1 21,331

CEILING JOIST

WASHER

CEILING JOIST

MAINTENANCE

Because of its rugged design, superior engineering, and high

quality craftsmanship, the heater requires little maintenance,

With proper care, your electric heater should last a lifetime, but

seasonal cleaning is recommended to maintain the efficiency

of the heater.

IMPORTANT DIGITAL DISPLAY STATUS INDICATOR NOTE:

This Industrial Heater contains no user serviceable parts. In the

unlikely event that your heater should need service the digital

display will indicate “E1",“E2” or “E3” please refer to the Error

Code Troubleshooting Guide on the next page or contact:

World and Main (Cranbury), LLC

324A Half Acre Rd.

Cranbury, NJ 08512 USA

800-221-6895

www.comfortzoneproducts.com

CLEANING THE HEATING ELEMENT

To Prevent possible electric shock, all power must be shut off at

the main service before inspecting or cleaning.

To clean the heating element, loosen (but do not remove) the

four Phillips head screws located behind the louvers in the

corners of the louver housing on both sides, lift up, and pull out

(see Figure 10). This provides access to the heating element.

Remove dust or lint with a soft brush or a vacuum cleaner.

Replace the louver housing and tighten the Phillips head screws.

Use care to prevent damage to internal heater wiring when

cleaning element. make sure all connections remain tight

and all wiring is routed away from element fins when

reassembling the unit. Allowing wiring to touch the element

fins could result in a fire hazard.

CLEANING THE FAN AND MOTOR

To prevent possible electric shock, all power must be shut

off at the main service before inspecting or cleaning.

Remove the protective grille from the rear of the heater.

This provides access to the fan and motor. Wipe off the fan

and the motor with a soft cloth or brush. The fan motor

does not require lubrication. Replace protective grille

(see Figure 11).

REMOVE SCREW

TO OPEN DOOR

USE TOP KEYHOLE

SLOTS IF HEATER IS

TO BE TILTED DOWN

3ft.

min.

CONDUIT

CONNECTOR

FLEXIBLE

CONDUIT

FLEXIBLE

CONDUIT

CONNECTOR

FLEXIBLE

NM CABLE

FLEXIBLE NM CABLE

CONNECTOR

(use per electrical codes)

1 2

FLEXIBLE CONDUIT

CONNECTOR

(use per electrical codes)

Figure 6

If Heater is to

be turned

and wire is

inside conduit.

If Heater is to

be connected

with NM Cable

If Heater is to

be connected

with

Flexible Conduit

WARNING

HEATING

ELEMENT

Figure 10

Figure 11

Page 1 Page 2

Page 3 Page 4

14"

12-½"

NOTE: Min. clearance

to ceiling when not using

mounting brackets is 1-

MINIMUM

DISTANCE

TO WALL

MINIMUM

DISTANCE

FROM

DISCHARGE

TO ANY

OBJECT

24"

7-3/8"

MINIMUM

DISTANCE

TO WALL

13"

10-3/5"

4-½"

½"

¾"

MINIMUM DISTANCE

TO FLOOR

6 ft.

MAXIMUM MOUNTING HEIGHT FOR:

Vertical air delivery unit=11ft.

Horizontal air delivery unit= 8 ft.

1-¾"

FRONT VIEW SIDE VIEW

5/8".

MOUNTING

LOCATION

4-½"

Figure 2

7500W@240V 31.3 45 #8

HEATER RATING

& VOLTAGE

HEATER

AMPS

MAX.

FUSE SIZE

MIN. WIRE SIZE

75°C. COPPER

Installation (Continued)

CONNECTING THE POWER

1. Remove the screw from the front of the unit to connect the

power to the heater.

2. Attach the cable connectors to the unit (See Figure 6) and

slide the 8 gauge wire through the cable connector.

NOTE: This appliance must be grounded.

NOTE: Proper size fuses and circuit breakers in

accordance with the National Electric Code must be used.

NOTE: The appliance must connect to a current protection

circuit or device at 50Amp or more before connecting to

power supply. Higher protection limits may be required by

code. Check your local electrical codes.

NOTE: For certain applications, conduit may be required

(See Figure 6). Check local electrical codes. If you run the

wiring in conduit and wish to be able to turn the heater be

sure to purchase enough flexible conduit to allow the heater

to be turned.

Figure 7

HOT

GROUND

(or bare copper)

FAHRENHEIT OR CELSIUS DISPLAY

1. To switch the display between Fahrenheit and Celsius, press

the °F/°C on either the unit or the remote.

THERMAL CUTOUT

The heater is equipped with a thermal cutout which will

automatically shut off the heater. The heater will turn on when

the abnormal temperature returns to normal. Should the unit

overheat and cause the thermal cutout to cycle, the cause of

the overheating should be determined and corrective action

taken before further operation

ADJUSTING AIR FLOW DIRECTION

1. Turning the unit -If the unit has been installed with a single

lag bolt, as shown in the Figure 4a, simply turn the entire

unit as needed to adjust air flow, as shown in Figure 8.

2. Tilting the unit -Loosen the bracket screws (see Figure 5).

NOTE: To tilt the heater it must be mounted in bottom

keyhole slots of mounting brackets to maintain adequate

clearance and prevent possible overheating.

3. Adjusting the louvers to the desired position.

NOTE: The louvers are designed so they can’t be

completely closed. Do not attempt to defeat this feature,

damage to the unit can result.

Page 5 Page 6

LIMITED WARRANTY

This unit is guaranteed to the original retail purchaser against defects in quality or workmanship for a period of one year from the

date of original purchase. If this unit fails because of a manufacturing defect within 30 days of purchase, return the unit, with your

receipt, to the retailer. After 30 days, but within the warranty period, if the unit was purchased within the continental United States,

return it, freight prepaid, to World and Main for repair or replacement. If the unit was purchased outside the continental United

States, return the unit to the place of purchase. This warranty does not cover damage caused by misuse, abuse, overheating or

alteration. Repairs made by anyone other than World and Main are not covered in this warranty. World and Main will not be held

liable for any losses due to neglectful operation. All implied warranties, including the warranties of merchantability and of fitness

of purpose, if applicable, are hereby limited in duration to the period of one year from the date of original retail purchase. Some

states do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you. Incidental or

consequential damages arising from a breach of either express or implied warranties are hereby disclaimed and excluded. Some

states do not allow the exclusion of limitation of incidental or consequential damages, so this limitation or exclusion may not apply

to you. Upon the expiration of this warranty all such liability will terminate. No other warranties are expressed or implied.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. No informal

dispute settlement mechanisms are available. This limited warranty is given in lieu of all other warranties.

Manufactured for:

World and Main (Cranbury), LLC

324A Half Acre Rd.

Cranbury, NJ 08512 USA

800-221-6895

www.comfortzoneproducts.com

Rev. 060118

Error Code Troubleshooting Guide

Error Code

Overheat

Safety

Cut-Out

(Resettable)

To Clear E1 Code:

1. Power Off Heater.

2. Switch Off Breaker

(or Remove Fuse)

3. Allow Heater to Cool

(~15 minutes)

4. Switch on Breaker and

wait 1 minute

5. Power On Unit and follow

Instruction Manual for

Normal Operation

If E1 code persists please

contact manufacturer to

arrange product return.

To Clear E2 & E3 Codes:

1. Power Off Heater.

2. Switch Off Breaker

(or Remove Fuse)

3. Switch on Breaker and

wait 1 minute

4. Power On Unit and follow

Instruction Manual for

Normal Operation

If E2 or E3 code persists please

contact manufacturer to arrange

product return.

Re-Start Unit.

Follow Instruction Manual for

Normal Operation

Insufficient Clearance

Around Heater

Obstructed Vent

Fan Not Operational

Inadequate Copper Wire Guage

for Supply Connections

Inadequate Current (Amp)

Rating on Breaker

Improper Heater Shut Down

Detached or Loose Connection

at Room Temperature Sensor

Moisture Entrapment in Heater

Electrical Short-to Ground

at Room Temperature Sensor

Supply Connections Improperly Wired

Insufficient Service Loop on

Supply Connections

Electrical Short-to Ground

(Fan Blade Not Spinning)

(Fan Operates at Reduced Speed Due to Insufficient Power Input)

Excessive Distance from Power Source

(Fan Operates at Reduced Speed Due to Current Loss)

Consult a licensed electrician.

Ensure Supply Connections (L1, L2 & L3) are not contacting Housing

(Ground)

(L3 only provided in certain models).

Not intended for outdoor use. Not intended for use in bathrooms, shower

rooms, laundry facilities or other similar indoor locations.

Disconnect power!

Open Hinged Bottom Cover by removing retaining screws. Allow unit to fully

dry. Re-attach securely, close Bottom Cover and re-install retaining screw(s).

Disconnect power!

* Detach Fan Grille by removing retaining screws.

Locate Temp Sensor Thermocouple on Housing (below Fan Motor Bracket).

Ensure wire insulation is not damaged and internal conductor is not exposed.

Re-attach Grille by re-installing screws.

Consult a licensed electrician.

Ensure sufficient service loop in supply wires to maintain secure electrical

connections to rotate heater on bracket (particularly when using rigid or

semi-rigid conduit).

Consult a licensed electrician.

Ensure Supply Connections L1, L2, L3 & Ground are secure.

(L3 only provided in certain models).

Disconnect power!

* Detach Fan Grille by removing retaining screws. Locate Temp Sensor

Thermocouple on Housing (below Fan Motor Bracket). Ensure wire pair &

thermocouple "tip" are free of damage. Re-attach Grille by re-installing screws.

* Open Hinged Bottom Cover by removing retaining screws. Inspect Circuit

Card Assembly (adjacent to Supply Connection Terminal Block) for loose or

detached "plug-in" electrical connector. Re-attach connectors securely. Close

Bottom Cover and re-install retaining screws.

Consult a licensed electrician.

Ensure Adequate Wire Guage for Supply Connections

Consult a licensed electrician.

Ensure adequately sized Current Breaker or Fuse per National &

Local Electrical Codes.

Do not power off heater using circuit breaker.

Fan motor is designed to operate for a short period of time after

heating element shuts off to prevent an overheat condition.

Disconnect power! Inspect Fan Blade (Rear of Heater) for foreign or

dislodged object(s) preventing rotation. Remove Rear Grille and clear

interference, re-attach Rear Grille.

Remove any objects on heater or adjacent to heater vents. Do not block

intake or exhaust by columns, machinery, etc. Ensure 24 inches minimum

distance from heater exhaust (front) to any object

Ensure Heater is Installed with Sufficient Clearance All-Around

*6 feet minimun from floor

*8 inches minimum from rear of heater

*13 inches minimum from side of heater

Disconnect power!

Open Hinged Bottom Cover by removing retaining screw. Inspect Circuit

Card Assembly (adjacent to Supply Connection Terminal Block) for loose or

detached "plug-in" electrical connector. Re-attach securely, close Bottom

Cover and re-install retaining screw.

Room Temp

Sensor Open

Circuit

Room Temp

Sensor Short

Circuit

No Power or

Low Power to

Heater

Possible Cause

Clearing Error Codes