Electrical Power Supply Requirements; Relay Outputs - Trane TruSense RMWH Installation, Operation And Maintenance Manual

Electrical Power Supply
Requirements
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 cannot be
inadvertently energized. Verify that no power is present
with a voltmeter. To prevent electrical shock, the circuit
board cover must be in place when power is on.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
NOTICE
Electrostatic Discharge!
Electrostatic discharge can short equipment circuitry.
Ensure that you are properly grounded before handling
sensitive electronic equipment.
The device uses a power supply that accepts inputs of 100–
240 Vac, 50/60 Hz, 200 VA maximum.
Make sure the device is connected directly to the ac power
source through a dedicated circuit breaker.
Use an approved three-conductor wire (minimum
16 AWG), rated 300 Vac at 221°F (105°C), to complete the
ac power connection.
Use only conduit hubs and hardware that are suitable for
fiberglass enclosures.
Do the following procedure to connect electrical power:
1. Disconnect electrical power.
2. Install a circuit breaker for the incoming power
connections of the device.
a. Put the circuit breaker in a location that is near the
device and easy to access.
b. Clearly mark the circuit breaker as the
disconnecting unit for the device.
3. If applicable, remove the locking mechanism.
4. Release the two latches on the left side of the device.
RMWH-SVX001C-EN
5. Open the enclosure.
6. Attach the ESD wrist strap to the ESD connection point
inside the enclosure.
7. Use a 1/4-in. hex driver to remove the four hex nuts on
the circuit board cover.
8. Remove the circuit board cover.
9. Remove the ac power wiring hole plug.
10. Install conduit hubs that are suitable for fiberglass
enclosures through the ac power wiring hole plug
openings.
11. Put the AC power wiring through the conduit.
12. Connect the ac power wiring to the L1 (HOT) and L2
(NEUTRAL) input terminals. Make sure the connectors
are seated securely.
13. Connect the ac power ground wire to the ground bar so
the device chassis ground is connected to the earth
ground.
14. Make sure the wiring is not touching the sensor
assembly.
15. Install the circuit board cover.
16. Use a ¼-in. hex driver to install the 4 hex nuts on the
circuit board cover.
17. Disconnect the ESD wrist strap from the ESD
connection point inside the enclosure.
18. Close the enclosure.
19. Latch the two latches.
20. If applicable, attach the locking mechanism.
21. Supply electrical power to the device.

Relay Outputs

Refer to the Figure 11, p. 14
The TruSense™ RMWH Refrigerant Monitor has the
following five single-pole, double-throw (SPDT) relays.
The relay contacts are rated 8 A at 240 Vac/24 Vdc. Each
relay can be connected as normally open (NO) or normally
closed (NC).
• Fault
• Alarm
• Warning
• Caution
• Horn
Installation
for details.
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