22
feet (12 meters) with no obstructions. To increase the range
of a Wireless 20/40/60 Minute Timer, a Repeater (Y8252)
may be used. Multiple timers can be paired to a single main
control. Designed to be mounted in a standard 2 x 4” (51 x
102 mm) electrical box or surface mounted to a wall.
Figure 15. H/C Wireless 20/40/60 Minute Timer
(Y8251)
REPLACING THE BATTERY
The red LED Battery indicator will illuminate when the
battery on the timer needs to be replaced in the Wireless
20/40/60 Minute Timer. Replace the battery by:
•
Pulling the face plate off the wall.
• Replacing the battery located on the back of the Timer
Face Plate.
• Re-attaching the face plate to the back plate. Be careful
not to damage the tabs on the back plate when reat-
taching the face plate.
Back Plate
Face Plate
Figure 16. Replacing the Battery
H/C Ventilation Wireless Repeater (Y8252)
This device is used to extend range of the Wireless Timers
(Y8251). The wireless repeater plugs directly into a 120V
power outlet.
The Repeater should be installed at the halfway point be-
tween the Wireless 20/40/60 Minute Timer and the main
wall control if the timer is out of range.
When the Repeater is positioned correctly, a solid green
LED will illuminate indicating the Repeater has a strong
connection to the main wall control and may be moved far-
ther away if necessary.
Figure 17. H/C Ventilation Wireless Repeater (Y8252)
Overview of Installation Methods
There are three methods of installation for the ERV/HRV:
•
Simplified installation - See “Installation Methods - Sim
-
plified (Return/Return)” on page 23.
•
Partially dedicated installation - See “Installation Meth
-
ods - Partially Dedicated” on page 24.
• Fully dedicated installation - See “Installation Methods -
Fully Dedicated” on page 25.
SIZING THE DUCTWORK
The installer must ensure all ductwork is sized and installed
as designed to ensure the system will perform as intended.
The amount of air that the ERV/HRV unit will deliver is di-
rectly related to the total external static pressure of the sys-
tem. Static pressure is a measure of resistance imposed on
the blower by length of ductwork plus the number of fittings
used in the ductwork.
INSTALLING DUCTING BETWEEN THE ERV/HRV UNIT
AND LIVING AREAS IN THE HOUSE
A well designed and installed ducting system will allow the
ERV/HRV to operate at its maximum efficiency.
All ducts should be kept short and have as few bends or
elbows as possible to maximize airflow. Forty-five degree
elbows are preferred to 90º elbows. Use
Y
tees instead of
straight tees whenever possible.
All duct joints must be fastened with screws, rivets or duct
sealant and wrapped with mastic or quality duct tape to pre-
vent leakage. Mastic is preferred but if duct tape is used it
should be the aluminum foil type.
Galvanized (rigid) ducting from the ERV/HRV to the living
areas in the house is recommended whenever possible al-
though flexible duct can be used in moderation, if neces
-
sary.
A short length (approximately 12 inches [300 mm]) of
non-metallic flexible insulated duct should be connected
between the ERV/HRV and the supply/exhaust duct system
to avoid possible noise transfer through the duct system.
All ducts running through attics and unheated spaces must
be sealed and insulated to code.
IMPORTANT
Applications such as greenhouses, atrium, swimming
pools, saunas, etc. have unique ventilation requirements
which should be addressed with an isolated ventilation
system.
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