Ray-Dot RVS-22HA Installation Manual - page 11
RVS-22HA Installation Guide
TEMPERATURE PROBES
Connecting the Probes
The controller is supplied with one room probe connected to terminal # 1.
The probes operate at low voltage and are isolated from the supply. Be sure that
probe cables remain isolated from all high voltage sources. In particular, do not
route the probe cables through the same electrical conduits as other cables. Do
not run probe cables next to other power cables. If crossing over other cables,
cross at 90°. Connect the probe shield to the power supply ground terminal.
a
CAUTION
Switches are used to activate or deactivate the additional probes connected to the controller.
Activate each additional probe by setting the appropriate switch to on.
– Switch # 3 activates the probe connected to input # 2;
– Switch # 4 activates the probe connected to input # 3;
– Switch # 5 activates the probe connected to input # 4.
Extending the Probes
Each probe can be extended up to 500 feet (150 meters). To extend a probe:
1. Use a shielded cable of an outside diameter ranging between 0.245 and 0.260 in. (6.22
and 6.60 mm) to ensure the cable entry is liquid-tight. Cable size should not be under 18
AWG.
2. It is preferable to solder the cable joints (to ensure a proper contact between the two
cables) and to solder the shields.
Installing the Room Probes
Locate the room probe connected to terminal # 1 in the center of zone A and the room probe
connected to terminal # 2 in the center of zone B.
Installing the Humidity Probe
Install the humidity probe in the middle of the controlled area, where there is good airflow.
Defective Probes
Room Temperature Probes
If an activated probe is defective or missing, the defective probe pilot light turns on. The display
shows the value of the temperature measured by the remaining room probe(s), and the
controller operates according to this temperature. If all room probes are defective or missing,
the screen will display “P Lo” when the parameter selection knob is set to ROOM TEMP., and
the controller will operate according to the minimum ventilation cycle.
RAY DOT
Ventilation Control
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