Microtech ® Unit Electrical Connections - Daikin ARQ Installation And Maintenance Manual

MicroTech Unit Electrical
®
Connections
DANGER
To avoid electrical shock, personal injury or death, be
sure that field wiring complies with local and national fire,
safety, and electrical codes, and voltage to the system is
within the limits shown in the job-specific drawings and
unit electrical data plate(s).
WARNING
Power supply to unit must be disconnected before making field
connections. To avoid electrical shock, personal injury or death,
be sure to rigorously adhere to field wiring procedures regarding
proper lockout and tagout of components.
See "Electrical Data" on page
43 page 26 and Figure 44 or the job-specific electrical
drawings before proceeding with field power and control wiring.
See also the wiring diagram provided on the unit ventilator
inside-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.
CAUTION
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.
Figure 45: Electrical power On/Off switch located behind
front-middle access panel in wire trough, with power entry
accessed behind right-front access panel
Unit Main Power
On/Off Switch
Grommeted Power Wire Entry
IM 1083-3
28 & page 29, and Figure
2. Confirm that power is de-energized and locked and
tagged-out.
3. Plug in the unit control wiring male plug(s) into the
appropriate female plug(s).
• Plug in 4-pin (for MicroTech and Electromechanical, see
Figure 48 on page 31).
• 0-pin (MicroTech only, see Figure 49 on page 31).
• 12-pin (MicroTech only, see Figure 50 on page 31).
4. Insert the main power wires into the main power On/Off
switch terminal lugs (A, B and C). Note that terminal lug
B, not used on single phase. Connect the Ground wire to
the ground lug as shown in Figure 47. Tighten the terminal
lugs securely.
5. Reinstall the cover plate on the main power wire trough.
Note: For Electromechanical wiring (see Figure 58 on page
36).Control connections for elecromechanical are
made to the terminal block in the left end compartment.
Figure 46: Control wiring plug connections in right end
compartment.
Control wiring whips with
caps located in the right
front end compartment
Figure 47: Electrical power On/Off switch for power wiring
connections
Terminal lugs for main power wiring from unit,
field connection by others
Main Power On/Off Switch
Note: B not used on single phase.
30
A
B
C
Ground Lug
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