54
TC5-1N5FAB rev.06
ALARM SETTINGS
The controller sets off an alarm in the case of a power failure, a fault in the
supply circuit or a high or low temperature. Temperature alarms are de-
fined according to the set point as shown in the diagram below.
Room
Temperature
Set Point
High Alarm Offset
Time
High Temperature Alarm
Low Alarm Offset
The situation changes for high temperature alarms, however, when the outside
temperature is greater than the set point. In this case, the set point is
replaced by the outside temperature as the reference point. This means an
alarm is set off when the indoor temperature reaches Outside Temperature
+ High Alarm Offset. Internal switch # 6 must be set to ON to use this
feature. A third parameter, called the critical high temperature, is defined to
continue monitoring the indoor temperature for high temperatures. When
the indoor temperature reaches the critical high temperature (defined as
an absolute value), an alarm is set off.
Adjusting the Alarm Settings
The high and low alarm offsets range from 0.5
o
F to 40
o
F. The critical
temperature ranges from -40.0°F to 120.0°F (-40.0°C to 48.9°C).
n
Set the selection knob to
ALARM — OFFSETS / CRITI-
CAL
. The current low alarm
offset flashes on the display,
alternating with the word "
LO
".
19
TC5-1N5FAB rev.06
TC5-1N5FAB
The user can define a temperature curve to adjust the set point automatically
over a given time period.
A curve is defined using six points. Each point specifies a day number and
a set point for that day. Once the points of the curve are defined, the curve
must be activated. The controller will change the temperature set point every
hour in a linear fashion between consecutive points of the curve. When the
last point of the curve is reached, the temperature set point for that day is
maintained until the curve is reactivated.
NOTES :
i)
All six points of the curve must be specified. If six points are not needed,
repeat the last temperature value for each unnecessary point.
ii) Certain restrictions apply to reduce the risk of errors:
−
The highest possible day number is 99.
−
Decreasing day numbers are not allowed.
−
Increasing temperatures are not allowed.
−
The temperature variation cannot exceed 3°F (1.6°C) per day.
T
EMPERATURE CURVE
Temperature
Days
T
o
1
T
o
2
T
o
3
T
o
4
T
o
5
T
o
6
d4
d25
d35
d50
d70
d80
