The TP972A Pneumatic Thermostat is a two-temperature, two-pipe, proportioning thermostat used to control pneumatic valve and damper actuators in pneumatic HVAC control systems.

Two bimetal elements, one for direct-acting heating cycle and the other for reverse-acting cooling cycle • Adjustable throttling range • Automatic changeover from main line pressure changes • Indicating spiral bimetal thermometer • Individual concealed setpoint knobs for each bimetal
element, preventing unauthorized changes • Self-sealing branch line gage tap • Noncorrosive air passages • Glass filled Delrin backplate acts as thermal insulator to reduce cold wall effect • Air filter

Download PDF Manual Honeywell TP972A Pneumatic Thermostat Specification

A common question you may receive from dealers and/or homeowners in regard to the recently released HE420A1009 Whole-House Steam Power Humidifier is what makes this model better than it’s predecessors - the HE440 (2000-2006) and the previous HE420 (1997-2000)? The table provided below illustrates the new features/benefits of the HE420A1009, and what makes it better than before.

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The H1008A,D Automatic Humidity Controls with HumidiCalc+™ Software are duct mounted and provide automatic, low voltage, electronic control of by-pass flow- through, powered flow-through, steam and drum humidifiers in central heating systems. The H1008D also controls heat/energy recovery units and dehumidifiers. The H1008A,D are designed to automatically adjust the humidity level based on indoor temperature and humidity, inferred or measured outdoor temperature and the setting of the frost factor dial.

The frost factor setting is used to maintain a comfortable humidity level in the home while reducing moisture condensation on inside windows. The HumidiCalc+™ Software infers the outdoor temperature by monitoring the equipment cycles and eliminates the need for an outdoor temperature sensor when used on single-stage gas or oil furnaces. With the use of the C7089H Outdoor Temperature Sensor (purchased separately), the H1008A,D also provide automatic humidity control in heat pump and multi-stage systems.

Dry air is pulled through the Natural Cool Moisture™ system and a quiet fan blows out invisible, moisture-balanced air. Unwanted minerals and bacteria from the water are trapped inside the Natural Cool Moisture™ filter. When the unit is running you will not see or feel a “mist”. You will know your humidifier is putting moisture into the air as you watch the water level in your tank decrease throughout the day.

Your Robitussin Natural Cool Moisture™ filter has been designed using new
HealthShield™* technology which prevents surface growth and migration of mold, fungus and bacteria in the filter for its life - approximately one season. Keep in mind, depending on your water quality, mineral deposits can still clog or discolor the filter, affect its life and that of the humidifier.

The HE360 Powered Flow-Through Humidifier uses the warm air furnace blower to provide humidification for the whole house. The HE360 works with virtually any Honeywell humidity control, but use with the Honeywell Perfect Climate Comfort Center™ control for optimal performance.

Be sure the humidifier will be at least 3 in. (76 mm) above the furnace jacket or there will not be enough room for the drain line. Check that there is enough room above the humidifier to remove and install the humidifier cover. Do not install on a furnace jacket.

Locate the humidifier where the ambient temperature is between 32°F (0°C) and 160°F (71°C) or property damage can occur. Do not install where freezing temperatures could occur. Be sure supply plenum static pressure is no greater than 0.4 in. W.C. and water pressure is no greater than 125 psi or equipment damage can occur.

With Honeywell, you will have access to the most extensive zoning product line available, incuding conventional, communicating and wireless zone systems and dampers. Many products are available as kits to make ordering and installation even simpler.

EMM-3 and EMM-3U electronic min-zone systems. For new residential contruction with three or fewer zones, the honeywell electronic mini-zone system is the perfect choice. Uses virtually any 4-wire thermostat. EMM-3 controls single stage heat/cool equipment for two and three zone applications. EMM-3U controls singel stage, multi-stage concentional and heat pump equipment up to two stages of heat and cool for two or three zone application.

Download Manual PDF Honeywell Zoning Systems

Heating & Cooling Thermostats, Heating & Cooling Thermostats may be categorized as suitable for either “Do It Yourself” (DIY) Installation
(usually in homes or light commercial applications), or for Professional Installation (either in residential or commercial applications).

‘DIY’ Heating and Cooling Thermostats ‘Do It Yourself’(DIY) Residential Thermostats, available for both residential and commercial heating /
cooling applications, fall into two categories: Programmable Thermostats and Non-Programmable Thermostats. There are many variations available within these thermostat categories. DIYProgrammable Thermostats $Save$ A programmable thermostat can save you up to 33% on your utility bill,if used as directed. You simply set it up to adjust the temperature when you are away from home or asleep (when you don’t necessarily need optimum comfort) and your HVAC equipment runs less. Plus, your heating or cooling comes back to a comfort level automatically,just before you come home or wake up.

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The styling of the H8908 is designed to blend with the latest T8600 family of Honeywell Chronotherm® IV Deluxe Programmable Thermostats. A mounting template is included for mounting the H8908 next to the T8600. The H8908 can also be mounted at any other convenient location in the living area or equipment room.

The H8908B Humidistat and H8908C Dehumidistat (humidity controllers) provide automatic low voltage control of humidifiers and dehumidifiers or ventilators, respectively, in central heating and air conditioning systems. They have a spst, snap-acting, dust-proof switch and are designed for wall or surface duct mounting.

Download PDF Manual Honeywell H8908B Humidistat H8908C Dehumidistat