Amana HRV-150D, HRV-200D, HRV-300D Modes of Operation, Outside. The heat recovery venti

Air to House

Air to

outside

Air to

Outside

Air to House

Air from Outside

Air from

House

OPERATION

A Heat Recovery Ventilator (HRV) is designed to bring fresh air into a building while exhausting an equal amount of stale air. During the winter months, the incoming cold fresh air is warmed by utilizing the heat recovered from the stale air before it is exhausted to the outdoors. During summer months when the indoor space is air conditioned, the HRV will help in cooling the incoming fresh air with the stale air that is being exhausted.

Our HRV’s are designed to run continuous or on intermittent, giving the homeowner complete control over their air quality. Continuous low speed ventilation is recommended, which will help eliminate carbon dioxide, voc’s and other gases as well as freshen up the home. Intermittent high speed ventilation can be obtained through a variety of optional remote controls found in this manual (page 13 ). Below are some examples of sea- sonal operation of an HRV.

Winter:

Humidity control is very important during the winter months. This is when problems will be most apparent since condensation on the windows will often occur. The colder the outside temperature, the greater the risk of condensation in the home. The average relative humidity should be maintained between (30-60) to avoid conden-

sation. Low speed continuous ventilation with high speed override is rec- ommended.

Summer:

The air is sometimes hot and humid. To stop the warm humid air from entering, set the dehumidistat at its highest level. If the digital control is installed, the air exchanger can be set to cycle the unit on and off as desired from that wall control. However, continuous ven- tilation is recommended.

Spring:

Temperatures are more moderate and become warmer each day. To keep the humidity and tem- perature uniform, set the dehumidistat higher (if installed). You may also switch the HRV to standby mode if desired.

Fall:

Rain and rapid temperature changes make it diffi- cult to control the internal humidity level and may result in condensation on the windows. A remote dehumidistat may help give greater control over the inside environment.

MODES OF OPERATION

The entire line of Heat Recovery comes equipped with our new electronic uni-control board which offers a wide variety of features making it the ulti- mate ventilation control system. Our engineers have used the latest technology to provide solid, trouble free operation under any conditions.

The uni-control board offers stand alone operating capabilities as well as an exclusive 2 wire communication to most external controls. The trouble- free optional controls include: two different rotary dial dehumidistats, an air quality sensor (3 wire communication required), a 15 minute remote push-button timer, as well as the most sophisticated line of remote wall mounted controls, the digital control.

An on-board diagnostic LED helps find problems quickly and efficiently. For example the LED can be used to signal a broken or shorted electronic wall control wire. Electronic air temperature probe gives this board accurate readings in order to minimize unnecessary defrost operation, and the on-board jumpers provide the user with the option of adjusting defrost time and sequence to optimize performance under abnormal conditions. The defrost operation is automatic and is usually never adjusted.

1. Continuous / Ventilation Mode

In this mode of operation both fans are operating and exchanging air with

the outside. The heat recovery venti-

lator (HRV) constantly exchanges the air at the rate you select, either at low or medium speed, and switches to high speed when activated by an optional remote control. The "Low" and "Med" fan speed selection will cause the unit to operate in continuous exchange mode at an exchange rate of 35% and 50% maximum airflow rating respectively. Continuous mode is recommended, since pollutants are slowly but constantly being generated in your house.

Air from	3.Defrost/Recirculation Mode
House	(5 port “R” Models)

The automatic defrost cycle consists of a damper defrost which allows air

to recirculate throughout the unit & home. When the supply air stream

temperature goes below -5°C (23°F), the exhaust motor shuts down, the supply motor goes to high speed, and a damper closes the supply, open- ing a 5th collar. The ambient air is then recirculated through the unit & home for a period of 5 minutes. The unit will then resume normal opera- tion for a time period of 25 minutes. This damper defrost cycle continues until the supply air stream rises above 0°C (32°F). The recirculation fea- ture can be obtained with the use of an optional digital control.

* no exchange of air	2. Intermittent / Standby Mode
	The system is always on standby and operates
	at high speed when activated by an optional
	remote control. "Standby" should be selected
	if the user wishes to stop the unit from
	continuous exchange. We recommend that

the "Standby" mode only be used if your system is equipped with an optional external control, in which case, the unit would activate to "High" fan speed, until the control is satisfied and then return to standby (off).

Air from 4. Defrost (Fan shutdown 4 port

House models)

The automatic defrost cycle con-

sists of a fan shutdown. When the

supply air stream temperature goes below -5°C (23°F), the sup-

ply motor shuts down and the exhaust motor goes into high speed. Ambient air is passed through the unit for a period of 5 minutes. The supply motor will then re-start and run at the preset speed. The exhaust motor will also slow down to the preset speed, and the unit will operate in the run cycle for 25 minutes. This fan shutdown defrost cycle continues until the supply air stream rises above 0°C (32°F).

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