Controls Using 24 Vac; Controls Using Dc Analog Input/Output (Standard Low Voltage Multiconductor Wire) - Trane Horizon OAB Series Installation, Operation And Maintenance Manual

Installation
AVERTISSEMENT
Risque d'électrocution!
Le non-respect de cette consigne peut entraîner des
blessures graves, voire mortelles. Avant toute
intervention, coupez l'alimentation électrique, y
compris aux sectionneurs à distance. Suivez
scrupuleusement les procédures de verrouillage/mise
hors service préconisées pour empêcher tout
rétablissement accidentel de l'alimentation électrique.
The 24-volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn "Off"
all power to the unit before attempting to reset it.
The transformers are located in the control panel. The
circuit breaker is located on the left side of the
transformers and can be reset by pressing in on the black
reset button.

Controls Using 24 Vac

WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
AVERTISSEMENT
Risque d'électrocution!
Le non-respect de cette consigne peut entraîner des
blessures graves, voire mortelles. Avant toute
intervention, coupez l'alimentation électrique, y
compris aux sectionneurs à distance. Suivez
scrupuleusement les procédures de verrouillage/mise
hors service préconisées pour empêcher tout
rétablissement accidentel de l'alimentation électrique.
NOTICE:
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as unit terminals are not designed
to accept other types of conductors.
Before installing any connecting wiring, refer to
p. 20 for the electrical access locations provided on the
unit and Table 3 for AC conductor sizing guidelines, and:
1. Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the controls
and the unit's termination point does not exceed three
(3) ohms/ conductor for the length of the run.
24
Note: Resistance in excess of 3 ohms per conductor
3. Be sure to check all loads and conductors for grounds,
shorts, and mis-wiring.
4. Do not run the AC low-voltage wiring in the same
conduit with the high-voltage power wiring.
Table 3.
Distance from Unit to Control
000–460 feet
000–140 m
461–732 feet
104–223 m
Controls Using DC Analog Input/Output
(Standard Low Voltage Multiconductor
Wire)
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
Risque d'électrocution!
Le non-respect de cette consigne peut entraîner des
blessures graves, voire mortelles. Avant toute
intervention, coupez l'alimentation électrique, y
compris aux sectionneurs à distance. Suivez
scrupuleusement les procédures de verrouillage/mise
hors service préconisées pour empêcher tout
rétablissement accidentel de l'alimentation électrique.
Before installing any connecting wiring between the unit
and components utilizing a DC analog input\output signal,
refer to Figure 11, p. 20
provided on the unit.
1. Table 4
be followed when interconnecting the DC binary
output devices and the system components utilizing a
DC analog input/output signal to the unit.
Note: Resistance in excess of 2.5 ohms per conductor
Figure 11,
2. Ensure that the wiring between controls and the unit's
termination point does not exceed 2.5 ohms/
conductor for the length of the run.
3. Do not run the electrical wires transporting DC signals
in or around conduit housing high voltage wires.
may cause component failure due to
insufficient AC voltage supply.
24 Vac conductors
Recommended Wire Size
WARNING
AVERTISSEMENT
for the electrical access locations
lists the conductor sizing guidelines that must
can cause deviations in the accuracy of the
controls.
18 gauge
2
0.75 mm
16 gauge
2
1 mm
OAU-SVX005C-EN