Microtech Ii Unit Electrical Connections; Procedure - Daikin AVS 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 24, and Figures 96, 97 & 98 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.
2. Wire leads provided from unit ventilator electric connection box
to load side of unit power switch (switch provided by AAF).
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 as shown on figure 97. (A) shows
switch location for valve control units and (B), (C) and (D) show
location for Face & Bypass control units. (B) is for 208, 230 and
265 volt units. (C) shows location for 460 volt units.
7. Use IM 747 for MicroTech II wiring information/installation
procedures.
IM 817-4
Figure 97 - Electric Heat Unit Power Switch Locations
B
A
Table 24 - Floor AV Electrical Data/Motor Data and Unit Amp without
electric heat
Unit CFM Motor
L/s
Series (Nom.) HP
S07 750 354 1/4
S10 1000 472 1/4
S13 1250 590 1/4
S15 1500 708 1/4
# Amps at unit voltage, 60 Hz, single phase
See tables 30 & 31, pages 50 & 51 for electric
heat wiring data
Figure 98 - Electric Connection Box and Junction Box Located in
Right End Compartment
Switch Junction Box
Electric Power Wire Opening in
Back of Box
D
C
Unit Current #
Watts
115V 208V 230V
164 1.8 1.0 0.9
244 3.1 1.7 1.5
306 3.5 1.9 1.8
334 3.7 2.0 1.8
Auto Transformer
Fuses
High-Med.-Low-Off Motor Speed Switch
Terminal Strip
Page 37 of 60
265V
0.8
1.3
1.5
1.6