Table 11. Controls - On/Off; Table 12. Modulating Control By Nortec - Nortec NHPC Engineer's Manual

Part No.
2520259 DIGITAL HUMIDISTAT WALL MOUNTED ON/OFF
On/off wall mounted humidistat applicable as control humidistat or high limit
10% to 90% RH range with 5% non-adjustable differential.
2520273 DIGITAL HUMIDISTAT DUCT MOUNTED ON/OFF PACKAGE
On/off duct mounted humidistat, applicable as a control humidistat or high limit,
15% to 90% RH range with 4% non-adjustable differential.
132-9109 PRESSURE ELECTRIC SWITCH
On/off, remote mounted, 3 to 20 PSIG range, factory set to 13 PSIG with 2 to
6 PSIG fully adjustable differential, factory set to 3 PSIG. For use with
pneumatic humidistat (by others).
132-9203 AIR PROVING
On/off duct mounted, pressure differential switch, 0.07 IWC to 12.0 IWC fully
adjustable operating range, good for positive, negative or differential pressure
applications, stops humidifier if no differential pressure is sensed.
146-9000 COUPLED CIRCUITS
Factory internally wired in parallel to enable control of double circuit unit from
one set of external controls. Applies to NHTC 150 and 200 models only.
NOTE: NORTEC NH Series humidifiers must have a closed circuit across terminals 8 and 10. NORTEC highly
recommends the use of a high limit humidistat and air proving switch in series for this function.
Part No.
2520266 DIGITAL WALL CONTROLLER WITH DUCT SENSOR PACKAGE
This is a digital LCD setpoint controller with a duct mounted humidity sensor
used for modulating high limit or control.
2520261 DIGITAL WALL CONTROLLER WITHOUT INTEGRAL SENSOR
This is a digital LCD setpoint controller to be used with one or all of the
following remote sensors: remote wall sensor, remote duct sensor and outdoor
duct mounted temperature sensor.
1510142 DIGITAL WALL CONTROLLER WITH INTEGRAL SENSOR
This is a digital LCD setpoint controller with a wall mounted humidity sensor
used for humidity control in the space.
2520263 OUTDOOR DUCT MOUNT TEMPERATURE SET BACK
This sensor can be mounted directly onto the fresh air intake of the ventilation
duct. The humidistat controller reads the outdoor temperature and resets the
humidity control setpoint to prevent condensation in windows or building
structures. Use with modulating controllers above.
1509857 REMOTE DUCT SENSOR
This humidity sensor can be mounted directly onto the return ventilation as the
main controlling sensor. It can also be used as a supply high limit sensor. It
must be used in conjunction with any other controller for remote sensing.
1509858 REMOTE WALL SENSOR
This humidity sensor can be mounted on a wall as the main controlling sensor.
It must be used in conjunction with any other controller for remote sensing.
Table 11. Controls – ON/OFF
Description

Table 12. Modulating Control By NORTEC

Description
Qty
Control ____
High Limit ____
Control ____
High Limit ____
Qty
Control ____
High Limit ____
Control ____
High Limit ____
Control ____
High Limit ____
10-30
Page 112
2008-10-01