Bard EHWH42-A05, Installation Instructions Manual

Page: 8 / 17

Manual 2100-254E
Page
8 of 17
WIRING MAIN POWER
1. On all installations, size unit power supply wiring
for the minimum circuit ampacity requirement for
the unit and heater package combination listed on
the unit serial plate.
For existing installations, addition or upgrading of a
heater package may require that larger supply wires
be run to the unit. Resize all power supply wires for
the minimum circuit ampacity rating listed on the
unit serial plate that is applicable for your
combination of unit and heater package.
IMPORTANT
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact the
last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.
UNPACKING ELECTRIC HEAT PACKAGE
Remove the heat package from the shipping carton. The
heat package must consist of the following:
1. Basic heater.
2. Electric heat control base and wiring.
3. Installation instructions.
4. Wiring diagram (2), one to be applied to unit.
5. Adhesive label to remark serial plate to indicate new
model number. This is attached to the front of these
instructions.
2. All heater packages covered by this manual are
factory wired for a single supply circuit. The
following heater packages are field convertible to a
dual supply circuit if required or desired.
EHWA05-A15 EHWH04-A05
EHWA05-A20 EHWH04-A10
EHWH42-A05 EHWH04-A15
EHWH42-A10 EHWH04-A20
EHWH42-A15
3. To convert the above heater packages to dual circuit
configuration before installation, loosen 4 screws
holding jumper bar in place. Remove jumper bar.
Circuit A + B are now identified on the heater
package. See Figure 1.
Wire should be sized to the minimum circuit
ampacity as specified on the serial plates of units
that accept these heater packages for circuits A + B.
WARNING
Install properly sized power supply leads for
the unit/heater combination minimum circuit
ampacity as listed on the unit serial plate.
Hazard of fire. Failure to install properly sized
conductors could result in fire.