Trane RTWB Helical-Rotary Installation Operation & Maintenance page 23

RTWB-SVN01B-E4
Installation Electrical
Low-voltage wiring
The remote devices described
below require low-voltage wiring.
All wiring to and from these remote
input devices to the UCM, as
described in the hereafter
paragraph, must be made with
shielded, twisted-pair conductors.
Be sure to ground the shielding only
at the Clear Language Display.
C C A A U U T T I I O O N N
To prevent control malfunction, do
not run low-voltage wiring (<30V) in
conduits with conductors carrying
more than 30 V.
Emergency stop (normal trip)
The Clear Language Display
provides auxiliary control for a
customer-specified or -installed
latching tripout. When this remote
contact 6S2 (furnished by the
customer) is provided, the chiller
will run normally when the contact
is closed. When the contact opens,
the unit will trip off on a manually-
resettable diagnostic. This condition
requires manual reset at the chiller
switch on the front of the Clear
Language Display.
To connect, first remove the jumper
located between terminal 3 and 4 of
A1 TB1. Refer to the field diagrams
that are shipped with the unit.
External circuit lockout - Circuit
number 1
The UCM provides auxiliary control
of a customer-specified or -installed
contact closure, for individual
operation of circuit number 1. If the
contact is closed, the refrigerant
circuit will not operate. The
refrigerant circuit will run normally
when the contact is opened.
External circuit lockout will only
function if External Circuit Lockout
(service setting Menu) is enabled.
Connections are shown in the field
diagrams that are shipped with the
unit.
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