Installation
Figure 10 - Detail of positions of refrigerant sensors 5R56-1 and 5R6-2
3 | 2 | 1 |
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1 Sensor
2 Connector
3 Brazed connector on the condenser
another manufacturer's condenser in used, operation and performance may be degraded. Depending on the fan settings, malfunctioning may damage the RTUB due to instability of the high pressure.
Sound and vibration attenuating device installation on the discharge lines is strongly recommended in order to avoid any acoustical annoyance and distubing vibrations leading to discharge line failures.
WARNING
If the condenser connected to a dual- circuit RTUB is not an RTCA, it must comprise two refrigerant circuits, each with its own ventilation.The ventilation cannot be common to the two circuits.
For this type of installation, (non- RTCA condenser), an On/Off signal is available on the unit control module (UCM) of the RTUB for each refrigerant circuit, indicating whether the fans on each condenser circuit are on or off.The now autonomous control of the fan on each condenser circuit must comprise the following staging:
For an ambient temperature between 0 and 40°C, there must be four airflow control stages for each circuit (i.e. 25% of the nominal airflow in each stage).
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