43
Planning
Nortec RS
2596995_0_EN_1905
The following is a list of installation requirements for connecting Nortec RS humidifiers in a Linkup chain:
Up to 12 steam cylinders (equivalent of 1080 lbs/hr or 550 kg/h) can be connected together in the
Linkup chain.
18-24 AWG multi-strand, twisted pair, shielded cable must be used to connect the units.
All control signal inputs (humidistats/transducers and security loop) must be connected to the "Main"
unit only.
A jumper must be installed between the security loop pins "1" and "2" in the low voltage terminal
strip on all "Extension" units.
All control signal inputs must be connected to the low voltage terminal strip designated "A" in Nortec
RS 90/130/180 humidifiers with dual steam cylinders.
4.4.3 Humidity Control Design
4.4.3.1 Duct Distribution Control Design
When using the supply air duct for steam distribution, Condair highly recommends the use of an air
proving switch and a high limit humidistat in addition to a humidity controller. Environments with exterior
walls should also consider using an outdoor temperature sensor in the system. Refer to
1
2
3
4
10 ft (3 m) min.
Figure 24: Duct Humidity Control Location
1 Humidity controller (return air duct or inside the room)
2 High limit switch
3 Air proving switch
4 Outdoor temperature sensor (situated outdoors)
Air Proving Switch
Airflow is required for steam vented into the air supply duct to be absorbed before it can be distributed.
The normally-open dry contact Condair air proving switch connected to the humidifier's security loop
prevents humidification when the air handler is not operational.