Electrical
19
The electrical service to the unit
should be compared to the unit
nameplate to verify compatibility.
The type and sizing of all wiring
and other electrical components
such as circuit breakers,
disconnect switches, etc. should
be determined by the individual
job requirements and should
not be based on the size and/or
type of connection(s) provided
on the equipment. Verify the
electrical conductor size is
suitable for the distance to the
equipment connection and will
support the equipment electrical
load. All installations should
be made in compliance with all
governing codes and ordinances.
Compliance with all codes is the
responsibility of the installing
contractor.
The unit serial tag lists the unit
electrical characteristics such
as the required supply voltage,
motor and heater amperage and
required circuit ampacities. The
unit wiring diagram shows all
unit and field wiring. The installer
must be familiar with the wiring
diagram before beginning any
wiring as the wiring can change
from project to project.
All field wiring connecting to this
type of unit must be 105 °F
rated copper conductor and
should be in accordance with
the National Electrical Code
and any applicable local codes.
Branch circuit fusing and
electrical disconnect means (if
required) must be furnished and
installed by others. All unit-
mounted control components
and electrical heater elements
(when furnished) are factory
wired to the unit junction control
box located in the center of the
unit. Remote-mounted control
components are shipped loose
for field installation and wiring.
All wiring connections should
be checked prior to start-up to
ensure connections have not
come loose during shipment or
installation.
The electrical components,
located in the upper portion of
the unit, facilitate field wiring.
The applicable wiring diagram
for the unit ships with each unit
and must be strictly followed.
See unit wiring diagram,
provided with unit, for proper
voltage and for proper control
packages if used. Field power
supply wiring should be through
knockouts supplied in the side
and/or top of the unit.
Electrical shock can cause
personal injury or death. When
installing or servicing system,
always turn off main power to
system. There may be more than
one disconnect switch.
Thermostat “OFF” should not be
used for disconnect purposes.
Only qualified personnel should
perform service and installation.
Zehnder Rittling assumes no
responsibility for any damages
and/or injuries from improper
field installation and/or wiring.
Electrical connections
