CyberOne EC DX IOM Manual
3.0
COMMISSIONING, OPERATION
AND DECOMMISSIONING
3.1
Commissioning
For new installations, ensure the unit is ready to operate
by going through the Checklist for Completed Installation,
located in Appendix A, 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 STULZ.
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 an air conditioning technician.
3.1.1
Start-Up
CAUTION
For outdoor remote condensing units, apply power
to the eight hours before operating system. This
time is required to allow liquid refrigerant to be
driven out of the compressor. The compressor
crankcase heater is energized as long as power is
applied to the unit.
1.
Replace all equipment removed prior to performing the
start-up checks.
2.
Apply power to the CyberOne EC system at the main
power disconnect switch.
3.
Ensure that all blowers and fans are rotating correctly
and freely without any unusual noise.
4.
Test cooling operation by setting the temperature set
point below the actual room temperature to create a
demand for cooling. The compressor should come on and
the discharge air should feel cooler than the return air.
NOTE
The compressor may have a time delay on start-up.
5.
Test heating operation by adjusting the temperature set
point above the actual room temperature. The source
of heat should be energized to increase discharge air
temperature.
6.
Test humidification operation by creating a demand for
humidification. Use an amp meter to determine current
draw of humidifier. Visually check for vapor leaving the
steam head or feel if the cylinder is warm to verify the
humidifier is operational. In all cases, 1 to 6 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
rooms’ requirements.
An Operation and Maintenance manual for the humidi-
fier is provided with your unit under separate cover.
Refer to that manual for detailed information on the
humidifier operation.
7.
Test dehumidification operation by creating a demand
for dehumidification. Decrease the dehumidification
set point 10% below the actual room conditions (the
set point may already be below actual room conditions,
especially at start-up). The compressor circuit will be
energized to begin the dehumidification process. While
in this mode, the room temperature may decrease and
the reheat function may activate. As conditions in the
room change, you may have to re-adjust the set point as
you check the 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
Gas Reheat, utilizing a voltmeter and a point to point
method, ensure the control signal has energized the hot
gas reheat solenoid coil. For Hot Water Reheat ensure
that the control signal has energized the control valve
and the temperature of the water has decreased as it
passes through the unit.
9.
In all cases, 1 to 6 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.
3.1.2
Microprocessor Controller
Programming
The microprocessor controller is factory programmed based on
the model of the A/C system and optional features selected.
Most applications require no field start-up or program adjustment
beyond setting the current date and time. Separate operating
instructions for the controller have been sent with your unit,
including each feature’s factory “default” setting and the available
adjustment range, if applicable.
3.2
Decommissioning the Unit
Personnel performing the decommissioning must be
completely familiar with the unit before starting. Best practice
requires all refrigerants be recovered safely; see section 3.2.1
for guidelines. Prior to recovery, an oil and refrigerant sample
should be taken in case analysis is required prior to re-use of
the reclaimed refrigerant. Electrical power must be available
before decommissioning is started.
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