Principles of Operation

Automatic Steam Humidifier Control

Safety, Installation, and Operation Manual

READ COMPLETE INSTALLATION INSTRUCTIONS BEFORE STARTING.

WARNING This product must be installed by a qualified heating and air conditioning contractor. Failure to do so could result in serious injury from electrical shock or damage to product and voids product warranty due to possible product misapplication.

THESE INSTALLATION INSTRUCTIONS ARE FOR THE AUTOMATIC STEAM HUMIDIFIER CONTROL ONLY!

For Aprilaire® Humidifier installation, follow Aprilaire Humidifier Installation Instructions.

WARNING

1.240 volts may cause serious injury from electrical shock. Disconnect electrical power to the Steam Humidifier before starting installation.

2.Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling ductwork.

CAUTION

1.Do not set humidity higher than recommended. Condensation damage may result.

2.Do not set humidity up to recommended levels if there is condensation on the inside of windows. Condensation damage may result.

3.Do not mount Automatic Steam Humidifier Control on supply plenum or duct. High supply temperatures will cause the control to malfunction.

4.When installing Automatic Steam Humidifier Control on downflow furnaces, ensure blower continues to run after a heat call is satisfied to eliminate high temperatures from damaging the Automatic Steam Humidifier Control.

5.Do not configure Automatic Steam Humidifier Control for Modulating Control (jumper JP2 set to 1 & 2) when connected to a Model 1150 Steam Humidifier. Failure of humidifier may result.

The Aprilaire Automatic Steam Humidifier Control is designed to be installed in the return duct of the HVAC system. The control strategy of the Automatic Steam Humidifier Control is matched to the humidifier being controlled: when used with a Model 1150 Aprilaire Steam Humidifier, the Control supplies an on/off signal to the humidifier. When used with a Model 1160 or 1180 Aprilaire Steam Humidifier, the Control supplies a modulating signal to the humidifier. In terms of outdoor temperature compensation, the Control can be set up in automatic or manual mode, regardless of the humidifier model being controlled. The automatic mode incorporates the supplied Outdoor Temperature Sensor to automatically adjust the control set-point based on the outdoor temperature. The manual mode does not require an outdoor temperature measurement and is used for specific set-point control with the control set-point manually adjusted by the user. The Automatic Steam Humidifier Control will accurately control the humidity in the conditioned space within the range of 15% – 55% RH.

CONTROL TYPE

ON/OFF CONTROL FOR MODEL 1150

The Automatic Steam Humidifier Control sends a 10 VDC signal to the humidifier when the measured return air relative humidity is 3% or more below the set-point. This energizes the humidifier at 100% output. The Steam Humidifier is either on at 100% capacity or it is off.

MODULATING CONTROL FOR MODEL 1160 & 1180

The Automatic Steam Humidifier Control sends a signal to the humidifier between 0 and 10 VDC based on: a) the difference between measured relative humidity and set-point relative humidity, and b) where this difference or ‘error’ falls within an adjustable proportional control band. The output of the Control, and therefore the Steam Humidifier, is a ‘proportion’ of maximum output based on ‘a’ and ‘b’ above. See Figure 1 for graphical representation of the output.

1180, 1150, 1160 specifications

Aprilaire 1160, 1150, and 1180 are three advanced whole-home humidifiers designed to enhance indoor air quality, maintain comfort levels, and promote a healthier living environment. These models are engineered to tackle the challenges of dry air, which can lead to various health issues such as dry skin, irritated sinuses, and increased allergens. Each model has unique features and technologies that cater to specific needs, making them suitable for a variety of households.

The Aprilaire 1160 is a high-capacity option capable of humidifying homes up to 3,600 square feet. One of its most notable features is the automatic humidistat, which continuously measures indoor humidity levels and adjusts the humidifier's operation accordingly. This ensures optimum comfort without unnecessary energy consumption. The 1160 also utilizes the evaporative technology, which draws in dry air and passes it through a moistened wick, allowing moisture to evaporate and be released into the home. Additionally, its self-regulating design prevents oversaturation and ensures consistent humidity levels year-round.

The Aprilaire 1150, designed for homes up to 3,000 square feet, offers similar benefits, spotlighting simplicity and efficiency. It features an easy-to-use manual humidistat that lets homeowners set their desired humidity levels. The 1150 also incorporates a robust water panel that collects moisture, meaning it can effectively combat dry air in even the most challenging conditions. Its compact design allows for flexible installation options, making it a suitable choice for both new constructions and existing homes.

For larger spaces, the Aprilaire 1180 is an excellent solution, effectively servicing areas up to 4,000 square feet. Like the 1160, it benefits from an automatic humidistat for seamless operation. One of the standout features of the 1180 is its high moisture output capability, ideal for households with higher humidity needs. Furthermore, the humidifier operates quietly, making it suitable for bedrooms and other quiet spaces. Its advanced water panel technology and simple maintenance requirements set it apart as a reliable choice for homeowners looking to improve their indoor air quality.

Overall, Aprilaire humidifiers 1160, 1150, and 1180 are equipped with cutting-edge technologies and user-friendly features that cater to different home sizes and needs. By maintaining optimal humidity levels, these devices not only enhance comfort but also create a healthier living environment.