Phason
Natural Ventilation Control
33140002
7
Connecting the temperature probe
Follow the guidelines below when installing and
connecting the temperature probe.
Do not run the probe cable in the same conduit as
AC power cables
Do not run the sensor cable beside AC power
cables or near electrical equipment.
When crossing other cables or power lines, cross
them at a 90-degree angle.
Replace damaged probes as soon as possible. If there is no probe present or
working properly, the NVC-2 displays either
p d
(probe damage) or
p s
(probe short)
and switches off the relays.
Connecting an alarm system
An alarm system can be a siren, an alarm panel, or an auto-dialer. See your alarm siren’s installation
guide for installation instructions and information about the type of system:
The descriptions for the alarm terminal are as follows:
CC
–common connection,
CA
–closed on
alarm,
OA
–open on alarm.
To connect an alarm system
If you are connecting the alarm system to a
network of controls and your system uses a
normally open
connection (closes on alarm),
connect the system as shown in the normally open
diagram.
Join all the common (
CC
) connections together
and all the closed-on-alarm (
CA
) connections
together. The NVC-2 alarm relays must be in
parallel with each other so any control can trigger
the alarm system when an alarm condition occurs.
TEMP
Normally open system (closed on alarm)
CONTROL
CONTROL
POWER
SUPPLY
