Controls Using 24 Vac; Controls Using Dc Analog Input/Output (Standard Low Voltage Multiconductor Wire) - Trane Horizon OABD 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.Verify that no
power is present with a voltmeter.
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 the below table
for AC conductor sizing guidelines:
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.
88
Note: Resistance in excess of 3 ohms per conductor may
cause component failure due to insufficient AC
voltage supply.
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 12. 24 Vac conductors
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)
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.Verify that no
power is present with a voltmeter.
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.
Before installing any connecting wiring between the unit and
components utilizing a DC analog input\output signal, find the
electrical access locations provided on the unit.
1. Below table lists the conductor sizing guidelines that must
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
can cause deviations in the accuracy of the
controls.
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.
Recommended Wire Size
18 gauge
2
0.75 mm
16 gauge
2
1 mm
OAU-SVX007A-EN