Therma-Stor Products Group Quiet-Vent Ventilation System - Manual (Page 5)

activate the high speed of the exhaust fan. These controls
are to be UL listed with minimum electrical ratings of 2 amps
inductive load at 125 VAC.
The prewired 7 day timer located on the Ultra-Aire Quiet Vent
activates the low speed of the exhaust fan. The timer can be
mounted remote from the Ultra-Aire Quiet Vent. This requires
a double gang electrical box and 3 conductors plus ground
to extend connections to the timer from the Ultra-Aire Quiet
Vent.
A 4" junction box cover is used to cover the timer opening on
the Ultra-Aire Quiet Vent.
WARNING: To reduce the risk of fire,
electric shock, or injury to persons, observe
the following:
A. Use this unit only in the manner intended
by the manufacturer. If you have questions,
contact the manufacturer.
B. Before servicing or cleaning unit, switch
power off at service panel and lock service
disconnecting means to prevent power from
being switched on accidentally. When the
service disconnecting means cannot be
locked, securely fasten a prominent warning
device, such as a tag, to the service panel.
CAUTION: For general ventilating use
only. Do not use to exhaust hazardous or
explosive materials and vapors.
3. Operation
3.1 Using the Timers
1. Setting The 7-Day Timer
Rotate the timer dial until the white pointer indicates the
correct time of day. Each segment moved toward the
dial center represents 2 hours of low speed exhaust fan
operation. Typically, the timer is set to operate during the
time of occupancy. If additional ventilation is required to
control moisture and odors, additional spades can be moved
in. If the home becomes too dry, decrease the hours of low
speed operation.
3.2. Using Remote Timers
Estimate the ventilation time required and set it on the timer.
Activate the timer whenever moisture or odors are generated
in the room. If timers are not available locally, they may be
ordered with the Ultra-Aire Quiet Vent.
3.2 Adjusting the Amount of Ventilation
The amount of air removed from the home depends on the
restrictions in the duct system and the amount of time the
system operates. If more or less ventilation is required the
7-day timer can be set for more or less low speed operation.
The air flow can be reduced by installing a duct damper in
the exhaust duct of the Ultra-Aire Quiet Vent.
By partially closing the damper, the CFM of stale air removed
from the house can be reduced. Figure 4 indicates air flow
and power consumption versus static duct pressure.
4. Maintenance
4.1 Cleaning the Blower Screen
WARNING: Disconnect the appliance from the power
supply before cleaning the blower screen.
A coarse screen covers the blower inlet port located inside
the Ultra-Aire Quiet Vent cabinet. Vacuuming the screen is
recommended every six months. Remove the 4" x 4" cover
on the side of the Ultra-Aire Quiet Vent cabinet for access
(See Fig. 1).
5 Service
CAUTION: Requires a qualified service
person because electrical shock hazard is
present.
5.1 Circuit Breaker Trips
Check For Short In Wiring:
FOR HVAC INSTALLER ONLY
5 Ultra-Aire Quiet Vent Installer’s & Owner’s Manual
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Air Flows And Watts At Various Pressures
CF HIGH SPEED
WATTS HIGH SPEED
WATTS LOW SPEED
CF LOW SPEED