Wiring Instructions - Global 246103 Manual De Instrucciones

Vertical or Horizontal Downflow Unit Heater

WIRING INSTRUCTIONS

BRANCH CIRCUIT (POWER)
1. Connect heater only to the voltage, amperage and
frequency specified on the nameplate.
2. Field wiring must be properly sized to carry the amperage
in accordance with the NEC.
3. The access door is hinged. There are either one or two
screws accessible from the bottom that must be removed
to gain access.
4. A knockout is provided in the back of the heater close to
the power terminal board. The control terminal board
knockout is 1/2 inch conduit size. The power terminal
block knockout is multiple diameter. Use the diameter that
fits the required conduit size.
knockout here
5. A ground terminal is provided near the power terminal
board. The ground wire should be connected before other
connections are made. The ground wire of model as
below.
Model
246103
246104
246132
246133
246134
6. The power terminal board is equipped with box terminals
sized to accept the correct size power supply wire. Wire
rated at 600V and 194°F is satisfactory for the heater
branch circuit. Copper wire is satisfactory for connection
to the heater power terminal board box terminal.
7. Each heater has a wiring diagram
the access door. Consult this diagram before making any
field connections.
8. Electrical Accessories, either kits or factory-installed
options, are shown connected by a dashed line on the
heater wiring diagram.
9. Single or three-phase connections may be used with
heater models 246132 and 246133. These units are
factory wired for single phase operation. If these heaters
are for use with three-phase power, reconnect the wires
as indicated in the wiring diagram attached to the heater.
Grounding wire
AWG#
14
14
8
6
12
affixed to the inside of
10. Connect the red live wire to L1, black live wire to L2 and
white live wire to L3 of the connector. Connect ground wire
to .
L1: red live wire L2: black live wire
Ground Wire
11.For model 246132 and 246133, the heaters are wired for
240V from factory. When heater is to be connected to
208V supply, the transformer leads have to be inter
changed. Inter change transformer red and black primary
leads (see wiring diagram on heater door). The color lead
is the COMMON for the 40VA control transformer
provided with these heaters.
CONTROL WIRING OF OPTIONAL
EQUIPMENT
Line voltage is present on some of the
terminals on the control terminal board.
Always disconnect the power from the heater
before making any connections to the control
board to prevent hazards.
1. Use min. 600 volt, NEC Class 1 insulated wire for all control
circuit wiring.
2. Use a crimp-on type fork terminal on the wire ends that
attach to the control terminal board if more than one
connection is to be made under the terminal screw.
3. Control wiring must be rated minimum 18 AWG.
NOTE: Thermostat and control circuit wiring must be
suitable to handle the full load of the heater
6
User's Manual
L3: white live wire