American Aldes DHV-150H Defrost Thermostat, Electric Ventilation Damper, Condensate Pump Kit

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5.7B Programmable Ventilation Timer

The ventilation timer controls the fan and the motorized fresh air damper. When the ventilation timer is activated, the central conditioning unit will circulate the indoor air, and bring in fresh air from outside. The ventilation timer should be set for the required ventilation of the residence. The home should be ventilated with fresh air as suggested by applicable codes and standards.

If the DHV-150H fails to ventilate as expected, check that the time on the timer is correct. For the timer to carry out the program schedule, the slide switch in the upper left corner on the timer must be set to “AUTO”. The slide switch in the upper right corner of the DHV- 150H must be set to “RUN”. Also check the programs on the timer to be sure that the timer is calling for ventilation at the correct times. If the timer fails to operate or operates erratically, reset the timer; see section 3.5 of this manual.

5.8 Defrost Thermostat

The defrost thermostat is attached to the refrigerant suction tube between the accumulator and the compressor. It will automatically shut the compressor off if the low side refrigerant temperature drops due to excessive frost formation on the evaporator coil. The fan will continue to run, causing air to flow through the evaporator coil and melt the ice. When the ice has melted, the evaporator temperature will rise and the thermostat will restart the compressor.

5.9 Electric Ventilation Damper

The ventilation timer controls the electric ventilation damper. The damper will open when the ventilation timer is activated to allow fresh air into the structure through the 6” diameter fresh air inlet duct. The electric ventilation damper will remain closed when the ventilation timer is not activated to prevent over- ventilating the structure when the unit is dehumidifying or recirculating the indoor air.

The electric ventilation timer operates on 24 Vac from the control circuit. DO NOT connect high voltage to the

damper motor or damage to the motor may result. DO NOT force the blade of the damper by hand or damage to the damper motor may result.

If the electric ventilation damper fails to operate:

1.Check that the wiring is correct and that voltage is present at the damper motor.

2.Check for any obstruction inside the damper.

If the electric ventilation damper fails to operate after performing these checks, it must be replaced.

5.10 Low Pressure Control

If the low side refrigerant pressure drops to 15 PSIG, the low-pressure control opens and shuts off the compressor and fan. It is an automatically reset control. It will close when the refrigerant pressure rises to 35 PSIG. Its primary function is to prevent damage to the compressor if a leak develops in the refrigeration system. It may also open if the unit is A) installed in a cool area (below 50 F) or B) installed where it is below 40 F and then started. Under these conditions, the unit will restart within several minutes. Until the unit warms up, it may cycle several times.

5.11 Condensate Pump Kit

An optional condensate pump kit is available from the factory for use with the DHV-150H. Condensate is automatically pumped to a remote location when the water level in the pump's reservoir rises to close the float switch.

The pump also contains a safety float switch. The white leads from this switch extend from beneath the pump cover. This switch should be installed in series with the field wire that connects the blue (#5) lead from the DHV-150H to the blue (#5) lead on the control panel.

If the pump fails, this switch opens the compressor control circuit and stops water production before the reservoir overflows. The DHV-150H will continue to ventilate or circulate air as normal, but will not dehumidify until this switch closes.

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Contents Location V 1 5 0 H I n d o o r a i r Q u a l i t y S y s t e mCondensate Removal Electrical RequirementsDucting 4A Installing Duct Collars4B Ducting for Dehumidification 4C Ducting for Fresh Air4D Constant Airflow Regulator and Vent Hood Options Remove Shipping Restraints Quiet InstallationPage Ventilation Timer Fan/Filter SwitchLow Pressure Control High Efficiency Air filterStandard Air Filter Warranty NoticeOptional Fresh Air Return Technical DescriptionUnit removes some water, but not as much as expected TroubleshootingCompressor/Capacitor Replacement Fan ReplacementRefrigerant Charging 6A Checking Compressor Motor Circuits6C Replacing a Compressor, Nonburn Out Remote Controls7A Humidity Control Defrost Thermostat 7B Programmable Ventilation TimerElectric Ventilation Damper Condensate Pump KitElectric Schematics of the DHV-150H Pictorial Electrical Diagrams of DHV-150H Service Parts List DHV-150H Indoor Air Quality System Optional Parts List DHV-150H Indoor Air Quality System Limited Warranty Date Service Notes

DHV-150H specifications

The American Aldes DHV-150H is an advanced ventilation unit designed to optimize indoor air quality in residential and commercial spaces. Known for its efficiency and reliability, the DHV-150H incorporates cutting-edge technologies to ensure that both air exchange and energy conservation are maximized.

One of the standout features of the DHV-150H is its high airflow capacity. It can effectively manage ventilation requirements for spaces up to 1,500 square feet, making it an ideal solution for medium to large residences and commercial buildings. The unit boasts a robust airflow rate of 150 CFM (cubic feet per minute), enabling swift air exchange and preventing the accumulation of indoor pollutants.

Energy efficiency is a hallmark of the DHV-150H, which is equipped with an advanced heat recovery ventilator (HRV) system. This technology allows the unit to recover and transfer heat from the outgoing stale air to the incoming fresh air. As a result, the DHV-150H can significantly reduce heating costs in winter, while still maintaining a comfortable indoor environment.

In terms of construction, the DHV-150H features a durable housing made from high-quality materials that ensure longevity and resistance to corrosion. Its compact design allows for flexible installation options, whether mounted on a wall or in a ceiling, seamlessly integrating into any architectural space.

The DHV-150H also prioritizes user experience and control. With a user-friendly interface, it allows homeowners and facility managers to easily adjust settings and monitor performance in real-time. This adaptability is further enhanced by compatibility with smart home systems, enabling remote control via smartphone applications or smart home networks.

Noise reduction is another key characteristic of the DHV-150H. The unit operates at a low sound level, ensuring that it does not disrupt the tranquility of living or working environments. This is particularly important for settings such as bedrooms, offices, and healthcare facilities where a peaceful atmosphere is essential.

In summary, the American Aldes DHV-150H represents a perfect blend of efficiency, technology, and user-centric design. Its high airflow capacity, energy recovery capabilities, robust construction, and smart integration make it a top choice for those seeking reliable and effective ventilation solutions. Whether for enhancing home comfort or improving commercial air quality, the DHV-150H continues to set standards in the HVAC industry.
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