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10
For the Installer
5.3.2 EXHAUST DUCTED SYSTEM - SUPPLY SIDE
CAUTION
When performing duct connections to the furnace supply duct, use metal ducts appropriately sized to support
the additional airflow produced by the unit.
Stale air from building ductwork:
• Install registers in areas where contaminants are produced: Kitchen, bathrooms, laundry room, etc.
• Install registers on an interior wall, 6 to 12 inches (152 to 305 mm) away from the ceiling OR install them in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away from the range.
Fresh air to building ductwork:
• Cut an opening into the furnace supply duct at least 18 inches (0.5 m) away from the furnace.
• Connect this opening to the fresh air to building port of the unit (use metal ducts, see illustrations below).
• Make sure that the unit duct forms an elbow inside the furnace ductwork.
NOTE: For this type of installation, it is recommended, however, not essential, that the furnace blower be synchronized with the unit.
5.3.3 EXHAUST DUCTED SYSTEM - RETURN SIDE
For the following units only:
S10 ERVplus 70E+
Stale air from building ductwork:
• Install registers in areas where contaminants are produced: Kitchen, bathrooms, laundry room, etc.
• Install registers on an interior wall, 6 to 12 inches (152 to 305 mm) away from the ceiling OR install them in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away from the range.
Fresh air to building ductwork:
• Cut an opening into the furnace return duct at least 10 feet (3.1 m) away from the furnace (A+B).
• Connect this opening to the fresh air to building port of the unit (see illustration at right) using metal ducting.
NOTE: For this type of installation, it is recommended, however, not essential, that the furnace blower be synchronized with the unit.
18” (0.5 M)
MINIMUM
Reverse units
VH0143
18” (0.5 M)
MINIMUM
Normal units
VH0146
B
A
A + B = AT LEAST
10’ (3.1 M)
VH0147
B
A
Reverse units Normal units
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