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Field Control Wiring
Figure 23. Field control wiring connections
Figure 24. Interconnecting control wiring
Main Control
Panel
24V Field
Terminal
Block
(TB2)
Control Wiring Raceway Cover
(Remove for access to harness
from main control box to unit
monted control devices)
RDS Unit
Condensing Unit
Main
Control
Panel
TB7
(24V)
TB5
(115V)
RoofPak applied rooftop units are available with several
control arrangements which may require low voltage field
wiring. Detailed descriptions of various field control wiring
options and requirements are included in the “Field Wiring”
section of Bulletin No. IM 483, “MicroTech Applied Rooftop
Unit Controller.” Refer to the unit wiring diagrams for addi-
tional installation information.
Wiring must comply with applicable codes and ordi-
nances. The warranty is voided if wiring is not in accordance
with these specifications.
Electric shock hazard. Can cause severe injury or
death.
Connect only low voltage NEC Class II circuits to termi-
nal blocks TB2 and TB7.
Reinstall and secure all protective deadfront panels
when the wiring installation is complete.
Most field control wiring connections are made at terminal
block TB2, which is located in the main control panel. Some
control options require field wiring connections to terminal
block TB7, which is also located in the main control panel.
Refer to Figure 23 and see “Main Control Panel” in the
“Control Panel Locations” section of this manual. Two
7
⁄
8
"
knockouts are provided for wire entry.
Interconnecting wiring enters the RDS unit through
7
⁄
8
"
knockouts in the bottom of the main control panel. The 115V
wiring is connected to TB5 and 24V wiring is connected to
terminal block TB7. Refer to Figure 24.
A
7
⁄
8
" knockout is also available in the end of the unit base
as shown in Figure 24.
Note: If a single conduit containing 24V and 115V wiring
is run above the roofline, the 24V wiring must be reinstalled
as an NEC Class I wiring system.
!
WARNING
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