Optional Outdoor Temperature Reset - Nortec NHTC Installation And Operation Manual

Optional Outdoor Temperature Reset

 Each digital controller is equipped with an integrated reset function that can reduce the
setpoint during cold weather operation. This will prevent condensation on windows and
building structures. The above graph illustrates how the setpoint reset feature operates.
 This feature is enabled by removing the jumper from terminals 8 and 1 on the humidistat
and wiring the outdoor temperature sensor to these terminals.
 When the outdoor temperature setback feature is in effect, the humidistat will normally
display the calculated setpoint limit based on the outdoor air temperature. A snowflake will
also be displayed to indicate cold weather operation. When any key on the controller is
pressed, the LCD screen will display the customer specified setpoint for a short duration.
2520263 - Outdoor Temperature
Sensor
Note:
1 The Temperature sensor is
intended for duct mounting.
2 Locate the temperature sensor
near the fresh air intake. This
will ensure accurate representation
of the outdoor air temperature.
Connect 24 VAC, terminal
1 of NHTC/PC to terminal
2 of controllers.
Figure 26: Outdoor Temperature Reset
Figure 27: Outdoor Temperature Sensor
Any NORTEC Digital Controller
(Not Transducer)
controls or jumper
between 1 and 2
E
x
t
e
r
n
a
l
Insert On/Off
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (NHTC only)
6 - 5 VDC
7 - Ground
8 - Blower Pack
9 - Blower Pack
N N
H H
Or
T P
C C
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