Nortec NHPC, NHTC manual 10-30, Controls – ON/OFF, Modulating Control By NORTEC, Page 112

Table 11. Controls – ON/OFF

Part No.	Description	Qty
2520259	DIGITAL HUMIDISTAT WALL MOUNTED ON/OFF	Control	____
	On/off wall mounted humidistat applicable as control humidistat or high limit
	10% to 90% RH range with 5% non-adjustable differential.	High Limit	____
2520273	DIGITAL HUMIDISTAT DUCT MOUNTED ON/OFF PACKAGE	Control	____
	On/off duct mounted humidistat, applicable as a control humidistat or high limit,
	15% to 90% RH range with 4% non-adjustable differential.	High Limit	____
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.

Table 12. Modulating Control By NORTEC

Part No.	Description	Qty
2520266	DIGITAL WALL CONTROLLER WITH DUCT SENSOR PACKAGE	Control	____
	This is a digital LCD setpoint controller with a duct mounted humidity sensor
	used for modulating high limit or control.	High Limit	____
2520261	DIGITAL WALL CONTROLLER WITHOUT INTEGRAL SENSOR	Control	____
	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	High Limit	____
	duct mounted temperature sensor.
1510142	DIGITAL WALL CONTROLLER WITH INTEGRAL SENSOR	Control	____
	This is a digital LCD setpoint controller with a wall mounted humidity sensor
	used for humidity control in the space.	High Limit	____
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.

10-30

Page 112 2008-10-01