IM 830-6
62 www.DaikinApplied.com
Making Control Connections
Controls by Others – Electrical
Connections
Rigorously adhere to field wiring procedures regarding proper lockout
and tag out of components.
To avoid electrical shock, personal injury or death:
1. Installer must be qualified, experienced technician.
2. Disconnect power supply before installation to prevent electrical
shock and damage to equipment.
3. Make all connections in accordance with electrical wiring diagrams,
and in compliance with national and local codes. Use copper
conductors only.
4. Do not exceed ratings of the device. This is a low voltage device:
Never apply more than 12VAC/VDC to any lead or damage will
result.
5. Avoid locations where excessive moisture, corrosive fumes, or
vibrations are present.
WARNING
!
WARNING
!
See
and the job-specific electrical drawings before proceeding
with field power and control wiring. See also the wiring diagram
provided on the unit ventilator right front access panel.
Unit ventilators equipped with an optional electric heating coil
have electric heating coil power connections at right end only,
.
Procedure
1. Provide power supply to right end compartment to match
unit nameplate.
Use copper conductors only. Use of aluminum conductors
may result in equipment failure and overheating hazards. All
wiring in right hand compartment must be class 1
CAUTION
!
2. Wire leads provided from unit ventilator electric connection
box to load side of unit power switch, (switch provided by
Daikin).
The junction box has 1"(25mm) and 2"(51mm) knockouts,
located 10-1/2"(267mm) from right end of unit.
3. Provide ground wire from grounding screw in switch
junction box to switch ground terminal.
4. Wire field power supply to line side of unit power switch.
Wire ground conductor to switch ground terminal.
5. Mount unit power switch in switch junction box and install
switch cover plate (provided).
6. On units with electric heat, the 2 pole unit power switch
is replaced by a 3 pole switch and is mounted in the
location for valve control units and (B), and (C) show
location for Face & Bypass control units. (B) is for 208,
230 and 265 volt horizontal (AH) units. (C) shows location
for 460 volt horizontal (AH) units.
Also, on electric heat units with controls by others, wiring
to the field mounted controller is done in the left end
compartment. See specific wiring diagram for details.
The unit comes with wiring that requires relay controls by
others.
It is the responsibility of the Automatic Temperature Control supplier to
check that the proper electric heat control components are installed,
and operate correctly to protect the unit.
CAUTION
!
Figure 101: Electric Heat Unit Power Switch Locations
See Electrical Data/Motor Data and Unit Amp without
electric heat
See Electric Heat wiring data table
Figure 102: Controls by Others Unit Power and Junction Box
Connection Location
1 Unit Main Power "On-Off" Switch
2 Factory-installed Fuse(s)
3 Three (3) Speed
HIGH-MEDIUM-LOW-OFF
Motor Fan Speed Switch