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Direct Air PHRVR 155 - 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
    Logan EverettAug 9, 2025
    What to do if Direct Air PHRVR 155 has poor air flows?
    • T
      Theresa GarciaAug 9, 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.
  • S
    Shane PaulAug 16, 2025
    Why is my Direct Air Fan air too humid?
    • A
      Alexander VargasAug 16, 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.
  • J
    Joan GoldenAug 22, 2025
    How to fix condensation or ice build up in insulated duct to the outside of Direct Air Fan?
    • K
      Kimberly ZamoraAug 22, 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.
  • D
    Daniel PottsAug 30, 2025
    Why is my Direct Air PHRVR 155 air too dry?
    • L
      Lacey MillerAug 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 Installation Warning

PHRVR 160 & PHRVR 210 Series

PHRVR Series Features

Key features of the PHRVR 160 and PHRVR 210 models.

PHRVR Series Optional Controls

Available external controls for enhanced functionality.

PHRVR 160;210 Specifications

PHRVR Defrost Operation

Description of the automatic defrost sequence and operation.

PHRVR Serviceability

Information on accessing components for maintenance and servicing.

PHRVR 160 & PHRVR 210 Series HRV

Dimensions

Physical dimensions and measurements of the HRV units.

Fan Performance Charts

Graphs illustrating airflow and static pressure performance.

Performance Data

Technical specifications including effectiveness and power ratings.

Airflow Diagram

Visual representation of air circulation within the unit.

PHRV 150 & PHRV 200 Series

PHRV Series Features

Key features of the PHRV 150 and PHRV 200 models.

PHRV Series Optional Controls

Available external controls for enhanced functionality.

PHRV 150;200 Specifications

PHRV Defrost Operation

Description of the automatic defrost sequence and operation.

PHRV Serviceability

Information on accessing components for maintenance and servicing.

PHRV 150 & PHRV 200 Series HRV

Dimensions

Physical dimensions and measurements of the HRV units.

Fan Performance Charts

Graphs illustrating airflow and static pressure performance.

Performance Data

Technical specifications including effectiveness and power ratings.

Airflow Diagram

Visual representation of air circulation within the unit.

PHRVR 305 Model

PHRVR 305 New Features

Highlights new features specific to the PHRVR 305 model.

PHRVR 305 Optional Controls

Lists available external controls for enhanced functionality.

PHRVR 305 Specifications

PHRVR 305 Defrost Operation

Description of the automatic defrost sequence and operation.

PHRVR 305 Serviceability

Information on accessing components for maintenance and servicing.

PHRVR 305 Series HRV

Dimensions

Physical dimensions and measurements of the HRV unit.

Fan Performance Charts

Graphs illustrating airflow and static pressure performance.

Performance Data

Technical specifications including effectiveness and power ratings.

Airflow Diagram

Visual representation of air circulation within the unit.

PHRV 140, PHRVR 155 & PHRVR 205 Series

Grouped Model Features

Key features of the PHRV 140, PHRVR 155, and PHRVR 205 models.

Grouped Model Optional Controls

Available external controls for enhanced functionality.

Grouped Model Specifications

Grouped Model Defrost Operation

Description of the automatic defrost sequence and operation.

Grouped Model Serviceability

Information on accessing components for maintenance and servicing.

PHRV 140, PHRVR 155 & PHRVR 205 Series HRV

Dimensions

Physical dimensions and measurements of the HRV units.

Fan Performance Charts

Graphs illustrating airflow and static pressure performance.

Performance Data

Technical specifications including effectiveness and power ratings.

Airflow Diagram

Visual representation of air circulation within the unit.

Operation Overview

Modes of Operation

Details continuous, standby, and defrost modes for PHRV and PHRVR units.

Optional Remote Controls

Dehumidistats and Air Quality Sensor

Humidity and air quality monitoring controls.

15-Minute Timer

Remote timer for brief high-speed ventilation.

Intellitek Multi-Function Control

Intellitek Control Functions

Digital display, timer, mode, speed, and cycle control options.

Installation Guidelines

Location Requirements

Proper placement of the HRV for optimal performance and serviceability.

Mounting Procedures

Steps for securely mounting the HRV unit.

Drain Line Installation

Instructions for setting up the condensate drain line.

Outdoor Duct Installation

Weatherhood Placement

Proper positioning of intake and exhaust hoods for optimal airflow.

Ducting Connection to Weatherhoods

Steps for connecting flexible ducting to exterior weatherhoods.

Indoor Duct Installation

Supply Air Ducting

Proper routing of fresh air supply to habitable rooms.

Direct Furnace Connection

Methods for connecting the HRV to a forced-air furnace system.

Indoor Exhaust Ducting

Dedicated Installation Method

Steps for installing the HRV in existing homes without forced air systems.

Installation Examples

Fifth Port Usage and Radiant Homes

Explains the use of the fifth port and application in radiant heated homes.

Fully Dedicated System Example

Illustrates a common installation for new construction.

Furnace Direct Connection Examples

Supply to Cold Air Return

Example of connecting supply air to the furnace's cold air return.

Simplified Furnace Connection: Return;Return

Simplified Furnace Connection: Supply;Return

Air Flow Balancing

Pitot Tube Balancing Procedure

Step-by-step guide for balancing airflow using a pitot tube.

Airflow Station (Grid) Method

Maintenance Procedures

Filter Maintenance

Instructions for cleaning or replacing air filters.

Heat Recovery Core Cleaning

Steps for cleaning the heat recovery core.

Troubleshooting Guide

Electrical Connections Diagram

Furnace Electrical Connections

Cooling System Wiring

Specific wiring for furnaces with cooling systems.

Accessory Control Contact Wiring

Diagrams for standard and alternate accessory control connections.

Local Dealer Contact Information

Direct Air PHRVR 155 Specifications

General IconGeneral
BrandDirect Air
ModelPHRVR 155
CategoryFan
LanguageEnglish

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