Reznor EWHB Unit Installation Manual - Manual (Page 8)

EWHB Series Industrial / Commercial Electric Unit Heater /Operating Instructions, Page 2 of 2 23-2180-83-5REZ
OPERATING INSTRUCTIONS
- Continued
RISK OF FIRE / EXPLOSION

This heater should not be used in potentially explosive atmospheres. Do not use in areas where gasoline,
paint or flammable liquids are used or stored.

Keep electrical cords, drapery, furnishings, insulation and other combustibles at least 3 feet (0.9m) from the
front of the heater and away from the sides, rear and top.

To prevent a possible fire, do not block or allow foreign objects to enter air intakes or exhaust in any
manner.
ELECTRIC SHOCK HAZARD

Keep electrical enclosure cover tightly closed while in operation.

Do not operate heater after a malfunction. Disconnect power at service panel and have heater inspected by
a reputable electrician before reusing.

Use this heater only as described in this manual. Any other use is not recommended by the manufacturer
and may result in fire, electric shock or personal injury.
RISK OF INJURY / BURN

The heater and discharge air are hot when in use. To avoid burns, do not let bare skin touch hot surfaces.
 Do not attempt to service or clean heater while unit is operating as there is a hazard from electric shock,
injury from operating fan blade and burns from hot heating elements.
The unit is designed to give years of safe, trouble-free operation when properly installed and maintained. Please
read the following guidelines to ensure reliable operation:
10. During normal operation, the limit controls are not supposed to cycle the heater ON and OFF. If frequent cycling of
the limit controls occurs, verify the minimum mounting clearances are maintained, proper operation of the room
thermostat and that there is no visible obstruction to the heater inlet or outlet. If this does not eliminate the limit
control cycling, the heater must be examined by qualified service personnel before further operation to determine
the cause.
11. Heater may be provided with a manual reset limit control. This limit control disables the electrical function of the
heater whenever excessive temperatures are present. If the manual reset limit control is suspected of causing heater
non-function then the heater must be disconnected from the heater electrical supply and examined by a qualified
service personnel. The personnel must determine the cause of the excessive temperatures, verify the minimum
mounting clearances, verify proper orientation of the heater, verify proper orientation of the room thermostat, or if
there are any obstructions or damage to the heater or heater inlet or heater outlet. The manual reset limit control
may be reset, after determining the cause, by removing the electrical enclosure cover and pressing on the manual
reset button. The location of the manual reset button within the electrical enclosure is shown in the Maintenance
Instructions.
12. Check out and report any unusual or questionable operating characteristics, such as noise, vibration, etc.
13. Set the temperature control thermostat to the desired room temperature setting and place unit in service.