Microtech Ii Unit Electical Connections - Daikin ARQ Installation Manual

MicroTech II™ 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 Table 11, 12 & 13, and Figure 47 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.
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 48: 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
Page 30 of 42 Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
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). Refer to Figures 49, 51, 52 & 53.
• Plug in 4-pin (for MicroTech II and Electromechanical, see
Figure 51).
• 10-pin (MicroTech II only, see Figure 52).
• 12-pin (MicroTech II only, see Figure 53).
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 50. Tighten the terminal lugs securely.
5. Reinstall the cover plate on the main power wire trough.
Note: For Electromechanical wiring (see page 36).
Control connections for elecromechanical are made to the
terminal block in the left end compartment.
Figure 49: Control Wiring Plug Connections in Right End
Compartment.
Control wiring whips with
caps located in the right
front end compartment
Figure 50: 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.
A
B
C
Ground Lug
IM 1083