Seeley Climate Wizard CW-80 Installation & Operation Manual page 51

APPENDIX B COMMISSIONING cont.
(9) Irrigation system
9.1 Refill tank to top sensor using techniques previously
outlined.
9.2 Run pump for around 15 seconds by pressing and
repressing "WATER PUMP".
9.3 Confirm correct direction of rotation relative to arrow
markings on top of fan cover.
9.4 Observe normal sounds, water flow through pump
outlet filter and some expected drop in tank level.
9.5 Check for any water leaks in the water distribution
system visible from the control panel end.
9.6 Repeat 3 more times (indexing valve has 4 outlet
circuits - this will check for any obvious leaks in
each circuit).
9.7 Take care not to run the pump dry.
(10) BMS signals confirmation
Note: Should the BMS field wiring be incomplete and
/ or the BMS system not be in operation, this step can
be skipped and addressed at a later date. In this case,
the cooler can be commissioned and in fact operated as
desired using "LOCAL AUTO" mode.
10.1 Select "OFF" control mode.
10.2 Press "NEXT" to navigate to the "BMS SIGNALS
STATUS" screen (refer page 25).
Here we can check incoming and outgoing BMS
signals without the need to operate the cooler. "Run"
and "cool" signals indicate the received signals in
real time (apart from one or two seconds of noise
filtering).
Supply fan speed input is shown as a voltage (0 to
10V) along with the converted speed integer (speed
0 to speed 10).
10.3 Request the BMS system to send signals and
confirm the presence of these signals as outlined
above.
10.4 Press the "TEST" button to generate a warning,
critical, or both errors, in sequence, being sent to
the BMS system - these are replicated signals for
validation purposes rather than real errors - confirm
receipt of these signals by the BMS system (cleared
automatically if accidentally left active whilst leaving
this screen).
10.5 For CW-80S coolers, there are two options for
cooling:
• Indirect cool where no significant amount of water
vapour is added to the supply air
• Direct cool where water vapour is added to the
supply air
These cooling options can be used individually or in
conjunction with one another. For CW-80T and CW-80T-
TWIN coolers, only the indirect option is available.
10.6 Where BACnet interface is fitted, separate screens
indicate the status of each of the BMS interfaces
under the headings of "BMS wired signals" and
"BMS BACnet signals".
Whilst the cooler is operating in "BMS AUTO" control
mode, press the already highlighted "BMS AUTO"
button again to display the BMS status screen that
is currently controlling the cooler.
(11) Automatic operation in Local Auto mode
11.1 Select "LOCAL AUTO" control mode.
11.2 On the local auto screen, select "RUN", "COOL" and
speed 10.
11.3 Press "NEXT" to navigate to the "OPERATING
MODE" home screen.
11.4 Observe the automated sequence similar to "BMS
Auto" operation (refer page 23).
11.5 After stabilising in "normal sequential watering"
mode, press "NEXT" to navigate to the "FANS
STATUS" screen.
11.6 Observe fan speeds and pressures
Normal readings are:
Supply speed 10, pressure 204 Pa
Exhaust speed 8, pressure 381 Pa
11.7 Fine tune the supply fan de-rating factor
(commissioning screen) so as to achieve rated
airflow. This is achieved by obtaining supply
pressure of 204 Pa (differential air pressure across
the supply part of the core).
11.8 Typical de-rating factors between 80% and 90% are
seen to adjust for customer's supply ductwork.
11.9 Values over 90% achieve little gain - idiosyncrasy of
the fans speed control.
INSTALLATION, OPERATION & MAINTENANCE MANUAL 866600CE-B | 51