0421 IH-5780
PAGE 3 OF 9
INTERNAL WIRING DIAGRAM
Heater is equipped with two high-temperature silicone
lead wires and a ground termination.
WARNING! ELECTRICAL SHOCK HAZARD! Serious
injury or death may occur.
• Disconnect from electrical supply before
installing or servicing this heater.
• Read and follow all safety information at right.
• Make certain the power source conforms to
the specifications on the heater label.
• Do not depend on a thermostat or other
switch as the sole means of disconnecting
power when installing or servicing the heater.
Always unplug the cord set or open the safety
switch and lock it open.
• All wiring must be performed by a licensed
electrician.
• The cord sets supplied with these heaters are
equipped with provisions for proper grounding.
Always mate the cord set plug with the proper
grounded receptacle in accordance with
the National Electric Code and all local
governing codes and ordinances.
CAUTION! Do not use an extension cord to
provide power to heater.
WARNING! Never connect the green or green-
yellow wire to a live conductor.
WIRING
MAINTENANCE
TROUBLESHOOTING
Cord Set
High-Temperature Wires
Quartz Lamp
Junction Box
(located inside of heater)
Figure 6
CAUTION! Always disconnect heater from power
source before performing any maintenance or
service.
Periodically clean the reflector with a dampened soft
cloth using a mild detergent. Rinse with water and wipe
dry with a clean soft cloth.
OPERATING ISSUE
CAUSES
RECOMMENDATIONS
Element does not
energize.
1. Defective element.
2. Improper connection.
1. Replace element.
2. Check connection to power outlet.
Not enough heat.
1. Heater too small for application.
2. Heater mounted too high or too
far.
1. Add additional heater(s).
2. Decrease mounting height or
distance.
Too much heat.
1. Heater too large for application.
2. Heater mounted too low or too
close.
1. Replace with smaller heater.
2. Increase mounting height or distance.
Hot spot in tube
1. Heater is not level.
2. Grease or moisture on tube.
1. Adjust to a level mount.
2. Clean tube. Replace if problem
persists
1-800-295-5510
uline.com