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Direct Air PHRV 150 - User Manual

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IMPORTANT - PLEASE READ THIS MANUAL
BEFORE INSTALLING UNIT
CAUTION - Before installation, careful consideration must be given to how this system
will operate if connected to any other piece of mechanical equipment, i.e. a forced air furnace
or air handler, operating at a higher static. After installation, the compatibility of the two piec-
es of equipment must be confirmed by measuring the airflow’s of the Heat Recovery
Ventilators by using the balancing procedure found in this manual.
It is always important to assess how the operation of any HRV may interact with vented com-
bustion equipment (i.e. Gas Furnaces, Oil Furnaces, Wood Stoves, etc.).
NEVER - install a ventilator in a situation where its normal operation, lack of operation or par-
tial failure may result in the backdrafting or improper functioning of vented combustion equipment!!!
PHRV(R) Series
Heat Recovery Ventilator
PHRV 140
PHRV 150
PHRV 200
PHRVR 155
PHRVR 160
PHRVR 205
PHRVR 210
PHRVR 305
INSTALLATION, OPERATION AND MAINTENANCE MANUAL

Questions and Answers

  • L
    Laura HansonAug 8, 2025
    What to do if Direct Air Fan has poor air flows?
    • C
      Courtney JonesAug 8, 2025
      If your Direct Air Fan has poor air flows, you can try the following: * Clean exterior hoods or vents. * Remove and clean the filter. * Remove and clean the core. * Check and open grilles. * Have an electrician check the supply voltage at the house. * Check duct installation. * Increase the speed of the HRV. * Have a contractor balance the HRV.
  • R
    Robert RodriguezAug 15, 2025
    Why is my Direct Air PHRV 150 Fan air too humid?
    • H
      Heather CobbAug 15, 2025
      If the air from your Direct Air Fan is too humid, here are a few things you can try: * Reduce the desired level of humidity. * Combine this step with the use of continuous exchange mode. * Wait until the outside temperature stabilizes (winter). * Heating will also improve the situation. * Store a majority of your wood outside; even dried, a cord of wood contains more than 20 gallons of water. * Arrange the outside vent for the dryer. * Open curtains or blinds; bay or bow windows may require a mechanical method. * Balance HRV. * Open the door or install a grill on the door.
  • M
    Michelle HernandezAug 25, 2025
    How to fix condensation or ice build up in insulated duct to the outside of Direct Air PHRV 150 Fan?
    • M
      Matthew YoungAug 25, 2025
      Condensation or ice build-up in the insulated duct to the outside of your Direct Air Fan can occur due to an incomplete vapor barrier around the insulated duct, such as a hole or tear in the outer duct covering. To resolve this, tape and seal all joints, tape any holes or tears made in the outer duct covering, and ensure that the vapor barrier is completely sealed.
  • S
    Sherry MedinaAug 31, 2025
    Why is my Direct Air PHRV 150 air too dry?
    • R
      Regina MedinaAug 31, 2025
      If the air from your Direct Air Fan is too dry, you can increase the desired level of humidity, change the ventilation mode from continuous mode to standby, and balance the HRV.

Summary

Important Safety and Installation Guidelines

Pre-Installation Unit Checks

Crucial safety and compatibility checks must be performed before installation.

PHRVR 160 & PHRVR 210 Series

Features and Specifications

Details key features, optional controls, and technical specifications for the PHRVR series.

PHRVR 160 & 210 Dimensions and Performance

Performance Data and Airflow Charts

Presents fan performance curves and operational data for the models.

PHRV 150 & PHRV 200 Series

Features and Specifications

Details key features, optional controls, and technical specifications for the PHRV series.

PHRV 150 & 200 Dimensions and Performance

Performance Data and Airflow Charts

Presents fan performance curves and operational data for the models.

PHRVR 305 Series

Features and Specifications

Details key features, optional controls, and specifications for the PHRVR 305.

PHRVR 305 Dimensions and Performance

Performance Data and Airflow Charts

Presents fan performance curves and operational data for the PHRVR 305.

PHRV 140, PHRVR 155 & 205 Series

Features and Specifications

Details key features, optional controls, and specifications for these models.

PHRV 140, PHRVR 155 & 205 Dimensions and Performance

Performance Data and Airflow Charts

Presents fan performance curves and operational data for the models.

Operation

Modes of Operation

Explains different operating modes like continuous, intermittent, and defrost cycles.

Installation

Location, Mounting, and Drain Line

Guidance on selecting location, mounting, and installing the drain line.

Installing Ducts to;from Outside

Weatherhood Placement and Ducting

Guidelines for locating weatherhoods and connecting flexible insulated ducting.

Installing Ducts to;from Inside

Supply Air Ducting and Furnace Connection

Instructions for supply air ducting and connecting to furnace systems.

Installation Examples

System Configuration Diagrams

Illustrates common installation configurations for various home types.

Air Flow Balancing

Pitot Tube Balancing Procedure

Detailed method for field balancing HRV airflow using a Pitot tube and gauge.

Maintenance

Filter and Heat Recovery Core Care

Instructions for cleaning filters and the heat recovery core to ensure efficiency.

Troubleshooting

Common Problems and Solutions

Addresses issues like dry/humid air, condensation, poor airflow, and frosting.

Electrical Connections

Wiring Diagram Overview

Provides a diagram showing how to connect controls and power to the unit.

Direct Air PHRV 150 Specifications

General IconGeneral
BrandDirect Air
ModelPHRV 150
CategoryFan
LanguageEnglish

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