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Installing fresh air damper, ducting,
and control...
1. Disconnect power from HVAC system.
2. Install the weather hood, ducting, and damper following
local practices. Be sure all duct and insulation seams
are tightly sealed.
3. Mount the transformer and control.
TIPS:
• In general, larger ducting allows higher airflow, minimizes
additional fan run time and may be needed for larger
homes.
• Installing a damper directly to the return duct may be
convenient to support the damper and reduce ducting.
• Fresh air connection should be downstream of sensors
(such as a humidistat) in return air plenum.
• The EARD6 end stops can be used to reduce the amount
of airflow in the duct. To prevent complete opening, loosen
(but do not remove) the wing nut and move the upper lever
until the desired position is reached. Tighten the wing nut.
Keep the lower lever in the position shown.
Y8150 FRESH AIR VENTILATION SYSTEM, W8150 FRESH AIR VENTILATION CONTROL
UPPER LEVER
WING NUT
LOWER LEVER
M20155
5
Wiring the control...
CAUTION
Electrical Hazard.
Can cause personal injury or equipment damage.
Disconnect power to all systems before beginning
installation.
1. Wire the control. See wiring diagrams in Fig. 1-10 as
listed below. All wiring must comply with local codes,
ordinances, and regulations.
2. Reapply power to system and control.
TIP:
• Control package allows wire routing through side slots and
bottom openings.
System Hookup Diagrams
Single transformer, conventional
Dual transformer, conventional
Multi-stage, conventional
Heat pump without emergency heat
Heat pump with emergency heat
Accessory Hookup Diagrams
Wiring with a PC8900 Thermostat
Wiring with a remote switch/timer
Wiring to an HRV/ERV
Wiring an exhaust fan
Wiring a fan for a steam humidifier
Fig. No.
Page No.
1
10
2
10
3
10
4
10
5
11
Fig. No. Page No.
6
11
7
11
8
11
9
11
10
12
68-0282—07
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