STULZ CyberRow DX Series Installation, Operation & Maintenance Manual
3.0 START-UP/COMMISSIONING
3.1 Initial
Operation
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 confi rmed during start-up.
Start-up must be performed by a journeyman, refrig-
eration mechanic or an air conditioning technician.
3.2 Step by Step Start-Up Instructions
1.
Replace all equipment removed prior to performing
the start-up checks.
2.
Turn the system on with the service disconnect
switch. Upon applying power to the controller
it begins an initialization sequence, conducting
internal diagnostics to confi rm functionality (see
Section 4.3).
3.
After about 30 seconds the Main screen is
displayed (see Figure 9). At the bottom of the
screen a status message “Unit On” appears.
01/01/09 00:00:00
00.0°F
00%rh
Dp 00.0°F
Unit On
Figure 9- Main Display Screen
NOTE
You may turn the A/C unit on and off at anytime
by pressing and holding the Enter (
) key for
3 seconds.
4.
After “Unit On” appears, the fans begin operating
in 5 second, time delayed stages (adjustable). The
middle fan is turned on 1st, then the upper fan, then
the lower fan. The STULZ logo in the display is
replaced with a blower
symbol.
5.
A 45 second time delay is allowed after the fi rst
fan turns on before the controller polls the air
proving switch. If adequate air fl ow is detected,
the controller enables its outputs. If the actual
room conditions are not within the range of the
programmed setpoints, the system will begin
operating in the mode(s) needed (cooling,
dehumidifying) to reach the setpoints. Symbols
appear in the display to indicate the active
operating modes (see Section 4.3).
6.
Temperature and humidity alarms are masked out
for 30 minutes to allow for conditions to stabilize
without triggering nuisance alarms.
7.
Ensure that all fans are rotating correctly and freely
without any unusual noise.
8.
Test cooling operation by decreasing the
temperature setpoint (see Section 4.5.4.1) to create
a demand for cooling. The compressor will turn on
and the supply air should feel cooler than the return
air.
In all cases, 1 to 6 hours might be required to see
the desired temperature and humidity level 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 system is
meeting the room’s requirements.
3.3 Microprocessor Controller
Programming
The
E²
microprocessor controller is factory
programmed based on the features selected with
the system. A user provided BMS may be used to
directly interface to the
E²
controller. The operator
may view all the available menu screens through
a BMS, however, changes may be made only to
basic parameters such as adjusting setpoints and
setting and acknowledging alarms. More advanced
parameter adjustments may be made through the
user interface display (see Figure 10). Operating
instructions for the
E²
controller are provided in
Section 4.0.
3-1
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