Installation and Maintenance Manual

UV-SVN02C-EN 41
Installation—Electrical
Wiring
All classroom unit ventilators have 115 V motor power.
Motor data can be found in Ta b l e 11 and Tab l e 1 2 :
Electrical Wiring
Unit Wiring Diagrams. Specific unit wiring diagrams,
based on unit options ordered, are provided inside each
unit and can be easily removed for reference. Use these
diagrams for connections or trouble analysis. Wiring
diagrams are attached on the inside of the front panel of
the unit.
Supply Power Wiring. Refer to the unit nameplate to
obtain the minimum circuit ampacity (MCA) and
maximum fuse size (MFS) or maximum circuit breaker
(MCB) to properly size field supply wiring and fuses or
circuit breakers. Refer to the unit operating voltage listed
on the unit wiring schematic, submittal, or nameplate.
Reference the wiring schematic for specific wiring
connections.
Note: All field wiring should conform to NEC and all
applicable state and local code requirements. The
control panel box is always on the end opposite the
piping connections. Access the control box by
removing the two screws that secure the front
cover. This will allow the panel to be removed, to
provide access to the electrical components.
If the unit does not have a disconnect switch, the power
leads and capped ground wire are inside the control panel.
If the unit has a disconnect switch, the power leads are
wired to the junction box switch on the control panel. Pull
the capped ground wire into the junction box.
Electrical Grounding Restrictions. All sensor and
input circuits are normally at or near ground (common)
potential. When wiring sensors and other input devices to
the Tracer controller, avoid creating ground loops with
grounded conductors external to the unit control circuit.
Ground loops can affect the measurement accuracy of the
controller.
All input/output circuits (except isolated relay contacts and
optically isolated inputs) assume a grounded source,
either a ground wire at the supply transformer to control
panel chassis, or an installer supplied ground.
Wall-Mounted Control Interconnection Wiring. The
installer must provide interconnection wiring to connect
wall-mounted devices such as a fan mode switch or zone
sensor module. Refer to the unit wiring schematic for
specific wiring details and point-to-point wiring
connections. Dashed lines indicate field wiring on the unit
wiring schematics. All interconnection wiring must
conform to NEC Class 2 wiring requirements and any state
and local requirements. Refer to the following table for the
wire size range and maximum wiring distance for each
device.
Important: Do not bundle or run interconnection wiring
in parallel with or in the same conduit with
any high-voltage wires (110 V or greater).
Exposure of interconnection wiring to high
voltage wiring, inductive loads, or RF
transmitters may cause radio frequency
interference (RFI). In addition, improper
separation may cause electrical noise
problems. Therefore, use shielded wire
(Belden 83559/83562 or equivalent) in
applications that require a high degree of
noise immunity. Connect the shield to the
chassis ground and tape at the other end.
Note: Do not connect any sensor or input circuit to an
external ground connection.
Supply Power. Power supply wiring is to be connected
to terminals 1 and 2 at the junction box in the left end
pocket, below the discharge air grille.
Electric Heat Units
Supply Power. Supply power wiring is to be connected
to the following line terminals in the right-hand end
pocket:
• 208V or 240V, 3-phase, 3-wire system: L1, L2, and L3
Table 11. UV Standard motor data
(a)
(a)Data typical for AA coil.
Unit
Size Volts RPM CFM Amps
Watts
(FLA) HP
75 115/60/1 1050 750 1.3 135 1
100 115/60/1 1050 1000 1.3 180 1
125 115/60/1 1050 1250 1.3 191 1
150 115/60/1 1050 1500 1.3 221 1
200 115/60/1 875 2000 1.3 311 1
Table 12. Hi-ESP Motor data
(a)
(a)Data typical for AA coil.
Unit
Size Volts RPM CFM Amps
Watts
(FLA) HP
75 115/60/1 1330 750 13 198 1
100 115/60/1 1330 1000 13 287 1
125 115/60/1 1330 1250 13 305 1
150 115/60/1 1330 1500 13 357 1
200 115/60/1 1330 2000 13 770 1
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of
conductors. Failure to use copper conductors could
result in equipment damage.
UV-SVN02_-EN.book Page 41 Thursday, January 24, 2013 4:48 PM