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Commissioning, Operation and Decommissioning
Commissioning the Unit
For new installations, ensure the unit is ready to operate by
going through the Checklist for Completed Installation
provided with the unit, prior to start-up.
Note: A Warranty Registration and Start-Up Checklist is
provided in the unit data package. It should be
completed during start-up and sent to Trane. This
checklist should be used as a guideline for items
that need to be confirmed during start-up.
Start-up must be performed by a journeyman refrigeration
mechanic or air conditioning technician.
Commissioning Steps
Important:
For air-cooled outdoor remote condensing
units (RCU), apply power to the RCU eight
hours before operating the system. This
time is required to allow liquid refrigerant to
be driven out of the compressor. The
compressor crank case heater is energized
as long as power is applied to the unit.
1. Replace all equipment, access panels and ceiling
panels that were removed prior to performing start-up
checks.
2. Apply power to start the CeilAir TR-OHS system at the
service disconnect switch, then turn the A/C system on
at the controller.
3. Ensure that all blowers/fans are rotating correctly and
freely without any unusual noise. Water/Glycol-cooled
units have a head pressure water regulating valve that
has been factory set. A valve adjustment may be
required based on water temperatures or water/glycol
flow conditions at your site; see section
Pressure Controls-Water/Glycol Cooled Systems,"
p.
33. If the system is a dual circuit unit, both
refrigeration circuits must be tested at start-up.
4. Test cooling operation by setting the temperature
setpoint below the actual room temperature. For dual
compressor systems, the setpoint must be lowered
below the compressor cut-in setpoints for both cooling
circuits. For systems equipped with the
microprocessor controlled controller, refer to the
microprocessor controlled Controller Operation
Manual provided with your unit. The compressor(s)
should come on and the discharge air should feel
cooler than the return air.
Note: Compressor may have a time delay on start-up.
5. Test heating operation by setting the temperature set-
point above the actual room temperature. The heater
will energize to increase the discharge air temperature.
6. Test humidifier operation by creating a demand for
humidification. Use an amp meter to determine the
current draw of the humidifier. Visually check for vapor
36
leaving the steam head or feel if the cylinder is warm
to verify the humidifier is operational. In all cases, one
to six hours might be required to see a desired level or
rise in humidity in the conditioned space. Once room
conditions have been programmed or set, a repeat
visit to the conditioned space may be required to
ensure the humidifier is meeting the room's
requirements. An Operation and Maintenance manual
for the humidifier is provided with your unit under
separate cover. Refer to that manual for detailed
information on humidifier operation.
7. Test dehumidification operation by creating a demand
for dehumidification. If necessary, set the
dehumidification setpoint 10% below actual room
conditions. The cooling circuit(s) will turn on to begin
the dehumidification process. While in this mode,
room temperature may decrease and the reheat
function may activate. As conditions in the room
change, you may have to readjust the setpoint as you
check operation. An adequate heat load within the
space is required.
8. For electric reheat, use an amp meter on the heater
circuit to determine if the heater is operational. For hot
water reheat, ensure the control signal has energized
the control valve and the temperature of the water has
decreased as it passes through the unit. In all cases,
one to six hours might be required to see a desired
level or decrease in humidity in the conditioned space.
Once room conditions have been programmed or set,
a repeat visit to the conditioned space may be required
to ensure the dehumidification mode is meeting the
room's requirements.
Operating the Unit
"Head
This section provides simple instructions for powering an
TR-OHS unit on and off. The procedures differ depending
on the installed controller.
Shutdown Procedure
1. For equipped units, press and hold the Enter key for 3
seconds.
2. For all units, turn off power at the unit main power
disconnect.
Start-up Procedure
1. Power on the unit at the main power disconnect.
2. A-Tech-equipped units will start automatically. For
microprocessor controlled equipped units, if the
controller is programmed for automatic start, the unit
will enter an operational state automatically;
otherwise, a status message will appear stating
manual start-up is required. Press the Enter key to start
the unit.
AH-SVX008C-EN
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