Table of Contents
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Ventilation
FILTER COVER
LOW PRESSURE PORT
INLET COLLAR AND
NORMALLY CLOSED
POWER DAMPER
SURFACE MOUNT
BRACKET LOCATION
LOW PRESSURE PORT
INLET COLLAR AND
NORMALLY CLOSED
POWER DAMPER
READ AND SAVE THESE INSTRUCTIONS
INSTALLATION & OPERATING
INSTRUCTIONS
Model 8145A
Fresh Air Ventilator
VENTILATION CONTROLLER
HIGH PRESSURE PORT
OUTLET COLLAR
HIGH PRESSURE PORT
OUTLET COLLAR
JOIST MOUNT
BRACKET LOCATION
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Summary of Contents for Aprilaire 8145A
- Page 1 INSTALLATION & OPERATING INSTRUCTIONS Model 8145A Ventilation Fresh Air Ventilator FILTER COVER VENTILATION CONTROLLER HIGH PRESSURE PORT LOW PRESSURE PORT INLET COLLAR AND NORMALLY CLOSED POWER DAMPER OUTLET COLLAR SURFACE MOUNT BRACKET LOCATION HIGH PRESSURE PORT LOW PRESSURE PORT OUTLET COLLAR...
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Page 2: Table Of Contents
TABLE OF CONTENTS Safety Instructions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2 Set Up �... -
Page 3: Introduction And Compliance Statement
INTRODUCTION AND COMPLIANCE STATEMENT The Model 8145A Fresh Air Ventilator is designed to bring in precisely the right amount of outdoor air into today’s efficiently designed homes� Duct the inlet of the ventilator to an outdoor air intake and duct the discharge to the HVAC system, then simply plug the unit in, set the amount of needed ventilation and select the desired temperature limits�... -
Page 4: Install Electrical Outlet
INSTALL ELECTRICAL OUTLET Install a standard NEMA 5-15 receptacle suitable for the location, near where the ventilator will be installed� The ventilator comes equipped with a 6-foot power cord with a standard 3-prong plug� VENTILATOR LOCATION AND ORIENTATION If the outlet of the ventilator is not ducted, or if small sections of collapsible duct (i.e. -
Page 5: Mount The Ventilator
MOUNT THE VENTILATOR 1. Select the appropriate brackets, large or small, for mounting the ventilator (see FIGURE 3)� If mounting to the wall or hanging from joists, use the four small mounting FIGURE 3 – BRACKETS brackets� If mounting on or in between the floor joists, install all four smaller brackets for 13”... -
Page 6: Mount Intake Hood
MOUNT INTAKE HOOD Install a weather tight hood with a bird screen� Cut a hole in the exterior wall that is large enough to fit 6” insulated flexible duct through with minimal compression of the insulation. Pull the duct through the hole and attach the flex duct to the collar of the hood. Use metal foil tape or a plastic zip-tie to secure the duct to the collar�... -
Page 7: Wiring The Control To The Hvac System
WIRING THE CONTROL TO THE HVAC SYSTEM NOTICE FIGURE 6 – REMOVE CONTROL KNOB AND COVER Disconnect power to HVAC system during wiring to avoid electrical shorts. 1. Remove the control knob and cover as shown in FIGURE 6. Set aside in a safe place until all wiring has been completed� 2. -
Page 8: Set Up
SET UP The control can be set up to prevent ventilation during the hottest or coldest periods of the day� When the outdoor FIGURE 9 – ADJUST HIGH/LOW TEMPERATURE LIMIT temperature exceeds the high value or falls below the low value, ventilation will stop and additional ventilation will be brought in at a later time –... -
Page 9: Measure Delivered Airflow
MEASURE DELIVERED AIRFLOW 1. Make sure the ventilator is plugged in and the integral control is wired to the HVAC system� 2. Use 1/4” flexible tubing to attach a pressure gauge set to “w.c. (sometimes shown as “in. w.g.” or “in. H2O”) to the inlet and outlet pressure ports on the ventilator�... -
Page 10: Determine Ventilation Time Setting
DETERMINE VENTILATION TIME SETTING CALCULATING AIRFLOW REQUIREMENT TABLE 3 – CFM REQUIRED Number of Bedrooms 1. The MINIMUM ventilation requirement is calculated using House ASHRAE 62�2-2010� Sq. Ft. ASHRAE Airflow in CFM = [House Area in Sq. Ft. x 0.01] + 1000 [(Number of Bedrooms +1) x 7.5] 1500... -
Page 11: Start Up And Sequence Of Operation
START UP AND SEQUENCE OF OPERATION Set the Ventilation Time knob to the setting that was determined in the previous section� The ventilator will turn on with the HVAC equipment for the set number of minutes during the one-hour cycle period� If the HVAC equipment does not turn on enough, the ventilator will turn on, and will turn on the HVAC system blower if wired to do so, at the end of the one-hour cycle period to ensure the desired ventilation time is met. -
Page 12: Internal Schematics
AprilAire’s exclusive obligation under this warranty shall be to supply, without charge, a replacement for any component which is found to be defective within such five (5) year period and which is returned not later than thirty (30) days after said five (5) year period by you to either your original supplier or to AprilAire, Madison, Wisconsin 53701, together with the model number and installation date of the ventilator�...
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