Nortec 132-3091 manual LOW Voltage Control Wiring, On-Off Controls, Control Installation

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LOW VOLTAGE CONTROL WIRING

On-Off Controls

Figure #9

External Wiring of On/Off Controls

A

B

C

EXTERNAL

8

10

INTERNAL

Controls are available from NORTEC as accessories. If controls were not ordered with humidifier, they must be purchased supplied by others. The following information is relevant to all controls, factory supplied or otherwise.

A, B and C (described below) are to be wired in series (only one path for current) across terminals 8 and 10 on the low voltage control terminal strip, or replaced with a jumper wire for constant operation. Caution: this is the “hot” wire from the 24V control transformer; it will blow the 3A fuse if any control field wiring touches ground metal.

A - Wall or Duct Mounted Control On/Off Humidistat: Wired to make on drop in humidity, break on rise to setpoint. Set to desired % RH. Can be a make/break set of contacts from a Building Automation System.

B - Duct Mounted Safety High Limit On/Off Humidistat (if used): Wired to make on drop in humidity, break on rise to safety setpoint. Set to approximately 85% RH as a safety to help prevent saturation and wetting in the duct.

C - Duct Mounted Safety Air-Proving On/Off Switch (if used): Wired to make when sensing air

flow, break when no air flow. Used as a safety to prevent saturation when no air flow.

1.NORTEC offers various versions of A, B and C to suit each application. In general, A is essential, whereas B and C are highly recommended in ducted applications.

2.Field wiring from humidistat to humidifier and between devices should be 18 AWG or heavier and kept as short as possible.

3.Low voltage control terminal strips are provided in the electrical compartment. Internal sides are factory wired. External sides are to be field wired.

4.Each humidifier is supplied with a wiring diagram inside.

CONTROL INSTALLATION

1.Mount any wall humidistat (control or high limit) over standard electrical box at height similar to typical thermostat. Any wall humidistat should be in location representative of overall space being humidified and not in path of blower pack or air supply grille. Do not mount on a outside wall where temperature fluctuation can affect control response.

2.Mount duct humidistat in location representative of overall air humidity, usually return duct. Do not mount it directly in front of steam distributor or in turbulent or mixing zone. Mount it where air’s humidity and temperature are uniform and representative of spaces being humidified.

3.Mount duct high limit humidistat downstream of steam distributors far enough that, under normal humidity and air flow conditions, steam will have been fully absorbed (typically at least 10 feet). It must be located to sense high humidity only when uniform and representative air is over-humidified or approaching saturation.

4.Mount duct air-proving switch so that it is able to sense air flow or lack of it. Wire it to make when air flow is sensed and break when air flow fails.

5.Check operation of all on/off controls before starting humidifier.

6.Calibration of controls (on/off or modulation) in the field may be necessary due to shipping and handling. Verify humidistat accuracy before commissioning system.

OPTIONAL MODULATION (CONTINUOUS

CONTROLS)

1.Read on/off controls section first since it is necessary to all control systems.

2.Virtually any modulation (continuous control) external hardware by others (as long as it has %RH setpoint circuitry) may be interfaced with pre-specified factory-configured NHMC/NHP Series pc board via the control terminal strip. The NHB can be used with on-off control only. Use shielded cables for modulation circuits.

3.Modulation (continuous control) by others for use with NHMC/NHP Series humidifiers involves one of several control wiring diagrams. In all cases, modulating signal interfaces through control terminal strip to main pc board inside humidifier.

4.The modulation signal must increase from minimum toward maximum as sensed RH (actual RH) drops below desired RH (%RH setpoint). In response, humidifier’s steam output will increase from minimum toward maximum. When humidifier’s steam output (lbs/hr) matches humidification load (lbs/hr), modulation signal will stabilize.

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Contents Installation Operation, Maintenance Guide Table Of Contents Maintenance TroubleshootingReceiving & Unpacking Equipment PRE-INSTALLATION CheckpointBasic Humidifier Configuration Blower Packs Location & MountingHumidifiers Plumbing Steam DistributorsWater Supply Line Drain LineAccessories Fill CUP Extension Kits Primary Voltage Supply Wiring to HumidifierElectrical Steam Line and Condensate Return LineLOW Voltage Control Wiring Control InstallationOn-Off Controls Optional Modulation Continuous ControlsVoltage Optional Modulation Continuous Control Packages by Nortec IntroductionLayout and Function Nhmc Operation START-UP Self TestNHB/NHP Operation When to Replace the Steam Cylinder Manual Capacity AdjustmentOther Potentiometers Detecting Water Supply DeficiencyNhmc NHB/NHPGreen Yellow RED Unit Status Lamps Remote Indication 24 VAC to61-20 62-40 63-36 Yellow Green HOW to Remove the Steam CylinderMandatory Cleaning of the Drain Valve HOW to Install the Replacement Cylinder Extended ShutdownBuilt on and Remote Mounted Blower Packs BOBP’s / RMBP’s Starting PointNHMC/NHP Excess Current ErrorNo Current Error Max. Filling Time Error Cylinder Spent ErrorOutput Too Low Error Electronic Error 7 Nhmc onlyContactor NHBUnit Max. Filling Time Cylinder SpentNo Current But Humidistat Calling Output Too LowUsing the Wiring Diagram ElectronicsYellow and Green Status Lamps Both On NHBTerms Used NHB Humidifier Nhmc Humidifier NHP Humidifier Wiring PowerWater Quality Humidifier MountingSTART-UP Procedure PreliminaryWhen to Replace the Cylinder Cylinder Replacement ProcedureHOW to Install the Replacement Cylinder Electrical Replacement Parts for NHB/NHP/NHMC Models Page Electrical Replacement Parts for NHB/NHP/NHMC Models Page Plumbing Replacement Parts for NHB/NHP/NHMC Models Plumbing Replacement Parts for NHB/NHP/NHMC Models Limited Warranty Cylinder Last Replaced

132-3091 specifications

Nortec 132-3091 is a highly regarded humidity control system designed to meet the precise needs of various industries, including pharmaceutical, healthcare, laboratories, and food processing. This system stands out due to its advanced features and technologies, making it a reliable choice for maintaining optimal humidity levels.

One of the main features of the Nortec 132-3091 is its energy-efficient operation. It incorporates innovative technologies that minimize energy consumption while delivering accurate moisture levels. The unit utilizes an intelligent control system that continuously monitors ambient conditions, adjusting output accordingly to achieve the desired humidity without excessive energy use.

Another key characteristic is its robust design, which emphasizes durability and reliability. The Nortec 132-3091 is built with high-quality materials and components, ensuring a long service life even in demanding environments. This attention to quality not only enhances performance but also reduces maintenance costs over time.

The system's versatility allows it to integrate seamlessly with various HVAC systems. It can operate as a standalone humidifier or be integrated into existing heating and cooling systems to enhance overall climate control. This flexibility makes it suitable for different applications and configurations.

User-friendly controls and an intuitive interface make the Nortec 132-3091 easy to operate and monitor. The digital display provides real-time readings of humidity levels, allowing for quick adjustments as needed. This feature is particularly beneficial in environments requiring strict humidity controls, such as cleanrooms and manufacturing processes.

Safety is a top priority with the Nortec 132-3091. The system includes multiple safety features, such as automatic shut-off and alarms, to prevent malfunction and protect sensitive materials and processes. The incorporation of advanced sensors ensures accurate readings and immediate feedback for real-time control.

Finally, the Nortec 132-3091 adheres to environmental standards and regulations, making it a sustainable choice for businesses looking to reduce their environmental footprint. Its eco-friendly refrigerants and low water consumption align with today’s sustainability goals, appealing to organizations committed to responsible operations.

In summary, the Nortec 132-3091 is a powerful and efficient humidification solution, combining advanced technology, durability, and user-friendly features. Its ability to deliver precise humidity control while minimizing energy usage makes it an excellent investment for various industries seeking optimal environmental conditions.
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