User's Manual

Component Identification
10 3A2954D
Electrical Connections
Requirements For All Installations
• The power supply must not exceed heater voltage
and amperage. See Models, page 2.
• Conductors used for supply connection must be
suitable for at least 221°F (105°C). An intermediate
Type “e” junction may be required.
• Branch circuit breaker over-current protection must
be used. The recommended branch circuit breaker
size is 30 amps.
• Connections are made through the strain relief cord
grip (87). It will accept cords with an outside diame-
ter of 0.51-0.71 in. (13-18 mm).
• Make your ground connection to the green ground
lug inside the control head.
• Make your power connections to the single white
and black wires which have loose ends in the control
head. Refer to the applicable schematic on page 15.
RTD Temperature Connection
(Model 262853 Only)
A separate smaller cord grip is provided to bring a cable
and connector into the M8 4-pin connection inside the
heater. Refer to the applicable schematic on page 15
and the Technical Data on page 27.
Grounding
Wire the heater to a properly grounded power supply
through the electrical connections and grounding
screw (8). In a mobile installation, also ground the truck
or trailer to a true earth ground.
Heater installation must be in compliance with all
applicable local codes and regulations. This equip-
ment must be grounded. Improper grounding, setup,
or usage of the system can cause electric shock. All
electrical wiring must be done by a qualified electri-
cian and comply with all local codes and regulations.
NOTICE
To help prevent damage, avoid spilling liquids onto
electrical components and never operate with the
cover removed or screws missing.
The equipment must be grounded to reduce the risk
of static sparking and electric shock. Electric or static
sparking can cause fumes to ignite or explode.
Improper grounding can cause electric shock.
Grounding provides an escape wire for the electric
current.