Dampers; Air Filters; General; Electric Heaters - Carrier AiroVision 39 HQ Installation, Operation And Maintenance Instructions

10.7. Dampers

-Check if the actuator motor is installed in accordance
with the supplier's instructions.
-Check if the correct angle has been set.
-Check if the dampers close properly.
-Check if the damper can open to the required an-
gle.
-Check operation after the power has been restored-
following a power cut. Some dampers must be open,
others must be closed.
Figure 50. - Manual
operation

10.8. Air Filters

-Check if the correct filters have been installed.
-Check if the filters have been installed correctly.
-Absolute filters are supplied separately, to prevent
contamination during transport and start-up. Insert
the absolute filters only after the unit has been
cleaned.
-Set pressure switches or filter indicators, if used.
-Close the inspection door.
-Filter installation details shown in Appendix 2.
-According to the filter and application type number
of filters usual with listed in Appendix 3.
10.9. Heaters

10.9.1. General

-Check connections in accordance with the dimen-
sional drawing.
Figure 51. - Actuator-
assisted operation
Figure 52.
-Check connections for leakage.
-Ensure that the heater can supply heat to pre-
vent frost formation when the fan is started.
-Caution: When the coils are drained, no water
must remain in the circuits to prevent freezing
at temperatures below zero.

10.9.2. Electric Heaters

-Ensure that the heater has been connected in ac-
cordance with the instructions of the supplier. The
diagram is located on the inside of the connection
module.
-Check the heater current.
-Check if the safety devices shown in the wiring dia-
gram have been installed.
-Check if the heater has been earthed in accordance
with local instructions.
-The electric heater may only be switched on if the
minimum specified air flow rate across the heater
exists.
-The electric heater must be switched off at least 5
minutes before the AHU is switched off.
-Ensure that no objects have been left in the heater
section.
-The following warning pictograms are attached to
the panel: electrical voltage and hot surface.

10.9.3. Steam Heaters

Steam heaters have surface temperatures above
100ºC. Steam supply must be checked by qualified
personnel.
-The steam heater may only be switched on if the
minimum specified air flow rate exists across the
heater.
-Ensure that no objects have been left in the heater
section.
-The steam heater must be switched off at least 5
minutes before the AHU is switched off.
-The following warning pictogram is attached to the
panel: hot surface.
23