Aprilaire 8120 User manual

Model 8120 and 8126 Ventilation Controller
O ner’s Manual
Includes Safety & Operating Instructions
and Warranty Information
READ AND SAVE THESE INSTRUCTIONS
1000740 2.09
B220440 B
IV. LIMITED WARRANTY
Your Research Pro ucts Corporation Aprilaire®Ventilation Controller is expressly warrante for five (5) years from ate of installation
to be free from efects in materials or workmanship.
Research Pro ucts Corporation’s exclusive obligation un er this warranty shall be to supply, without charge, a replacement for the
Controller which is foun to be efective within such five (5) year perio an which is returne not later than thirty (30) ays after
sai five (5) year perio by you to either your original supplier or to Research Pro ucts Corporation, Ma ison, Wisconsin 53701,
together with the installation ate of the Controller.
THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO
DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE CONTROLLER ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE
AFORESAID FIVE YEAR PERIOD. RESEARCH PRODUCTS CORPORATION’S LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES, OTHER THAN DAMAGES FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAID IMPLIED
WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S)
RESULT FROM FAILURE TO HAVE THIS UNIT INSTALLED BY A QUALIFIED HEATING AND AIR CONDITIONING CONTRACTOR. IF THE
LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR, ALL DISCLAIMERS OF IMPLIED WARRANTIES
SHALL BE EFFECTIVE UPON INSTALLATION.
Some states o not allow limitations on how long an implie warranty lasts or the exclusion or limitation of inci ental or
consequential amages so the above exclusion or limitations may not apply to you.
This warranty gives you specific legal rights an you may also have other rights which vary from state to state.
Please… Take a few minutes to visit us on-line at
www.apr la re.com
to register your Aprilaire pro uct.
If you o not have on-line access, please mail a postcar
with your name, a ress, phone number, pro uct purchase
an ate of purchase to:
Research Pro ucts Corporation
P.O. BOX 1467
Ma ison, WI 53701
RESEARCH PRODUCTS CORPORATION
1015 E. WASHINGTON AVE. • MADISON, WI 53703 • PHONE: [phone] • FAX: [phone] • www.apr la re.com
If the “TIME ONLY” resistor is use instea of the Out oor Temperature Sensor, the Control’s operation is
etermine by the timer settings as a juste only. The Control will not limit operation base on the
temperature an humi ity limits as shown in D agram 1. This feature is important for areas with mo erate
climates.
If a jumper wire is use in place of the Out oor Temperature Sensor, the Control will isregar the
temperature setting an base ventilation operation on the in oor relative humi ity an the timer settings
only. In this mo e the Control won’t allow ventilation if the in oor RH rises above 60%.
WARNING
120 volts may cause injury from electrical shock.
Disconnect power an turn off Vent Control before servicing.
Vent lat on Controller
Thank you!
Your Warranty Reg strat on nformat on w ll not be sold or shared outs de of th s company.
WARRANTY REGISTRATION

I. PRINCIPLE OF OPERATION
To ay’s houses are constructe using “Green” techniques an energy saving systems. These practices an
innovations help re uce your utility bills, but prevent the intro uction of fresh air, lea ing to the buil -up of
stale air. The a ition of VOCs into the home from cleaning, painting, an exhaust from attache garages
will remain in the air for exten e perio s of time. To correct these effects, ventilation systems are
installe . It’s important the ventilation system regulate hot air, col air, an humi ity extremes.
Your Aprilaire Vent Control will bring these un er control. It will meter in fresh air aroun the clock to help
re uce the stuffy effects of trappe air. The actual rate of ventilation is etermine by the size of your
home an the number of occupants. By accounting for these neither too much nor too little ventilation is
rawn in by your Aprilaire Vent Control.
With your investment in the Vent Control, you have a epen able way of provi ing fresh air to your home,
so that you can vent out stale air at optimum efficiency an convenience. Your Vent Control will work even
when you are absent. Working with your amper system the Vent Control tells when, an how long, it
shoul operate. It oes this through continuous monitoring of your in oor humi ity, along with the out oor
temperature. It then operates accor ing to the timer settings as a juste to your preference, or local co es
or the HVAC in ustry recognize ASHRAE 62.2-2007 gui elines. The Vent Control will not let outsi e air
enter if it coul potentially raise the humi ity insi e to high levels. To prevent this, the Vent Control has an
upper limit of 60% RH. For temperature extremes of below 0°F or above 100°F, the vent amper will not be
opene . This feature can be isable at installation at your preference, if fresh air is your priority.
Please Note: The Vent Control will not work if the inlet is clogge with ebris. Clean this regularly.
II. SET-UP INSTRUCTIONS
Your Vent Control is installe in the return uct of your furnace or heat pump. There are two a justable settings,
the cycle t me an the actual vent lat on t me within each cycle. Here’s how this works. If the cycle t me is
set to 1 hour an the control knob is set to 20 minutes, you will get 20 minutes of ventilation every hour.
Your ventilation setting, which is 20 minutes per hour in this example, can be met by the operation of your
heating or cooling system. Or if weather con itions are comfortable or the thermostat is on setback, the
Control itself will turn on the furnace blower to provi e the 20 minutes.
A. SETTING THE CYCLE TIME INTERVAL
• Your Installer shoul have alrea y set
this for you. This will likely be at the
recommen e factory setting of one
hour.
• If you eci e to change the cycle
setting yourself, first note or mark the
time setting of the knob. Then remove
the knob by carefully pulling it straight
out. Snap off the cover an refer to
F gure 1 to locate the cycle t me
setting pins.
• The jumper tab on the 5-pin array
etermines the cycle t me interval.
The interval can be 1, 2, 3 or 4 hours.
•Per iagram move the jumper tab to the length of time you want. The tab can be remove by pulling it
straight up off the pins.
• Once the cycle t me is set snap the cover back onto the Control base an push the knob back onto the
shaft. Reset it to twice its original location for 2 hours, an triple its original location for 3 hours.
Note that the knob can’t be iale any higher than 60 minutes, an so you might have to stay at the cycle
interval of 1 hour.
• The knob in icates the total running time for a 1, 2, 3 or 4 hour cycle, an so it oes not in icate running
time per hour per se.
B. SETTING THE VENTILATION TIME
• The knob on the front of the Control is use to set the
vent lat on t me within the cycle interval you set in Step A.
• The TEST setting is use to check the evice for proper
installation. It is not for normal operation, it will only
activate the Control for 1 minute. Do not leave the knob at
TEST, it oes not allow actual operating time.
• The OFF setting cuts off all circuit activation, while 0
leaves the circuit electrically active but it will not operate.
• The ial is labele in 15 minute increments, but can be set to
any estimate value within 5 minute accuracy. The Installer
will have alrea y set this for you accor ing to the size an
number of occupants for your home. If you feel like you nee
more or less time, turn the knob to a maximum of 5 minutes
either way. See how this works before a justing again.
MINUTES PER CYCLE
15
45
30
TEST
0
60
VENTILATION CONTROLLER
OFF
FIGURE 2 – Vent lat on T me
90-702
10005991
WIRING AND
JUMPER
CONFIGURATION
CYCLE TIME
1HR 3HR
2HR 4HR
TO STAT
TO HVAC
TO HVAC
GS
W
GH
CRDDT T
TO HVAC DAMPER
TEMP
SENSOR
OUTDOOR
TEMPERATURE
SENSOR
24VAC
A/A
CYCLE TIME
1HR 3 HR
2 HR 4 HR
90- 98
FIGURE 1 – Cycle T me
SECTION A
SECTION B
SECTION C
100°
20°
0°
55%
INDOOR RELATIVE HUMIDITY
OUTDOOR TEMPERATURE (F)
50°
SECTION A
15% 25% 35% 45% 65%
DIAGRAM 1 – Operat ng L m ts
90-713
Sect on A: Ventilation prevente ue to temperature extremes an /or high in oor humi ity.
Sect on B: Ventilation per the timer settings (Time Only).
Sect on C: Ventilation only with heat, per the timer settings.
III. OUTDOOR TEMPERATURE AND INDOOR HUMIDITY
CONTROL LIMITS
As installe your Aprilaire Vent Control will use input measurements of Out oor Temperature an In oor
Humi ity, plus the a juste time settings, to compute activation. The temperature out oors is measure
with a sensor at the fresh air uct inlet. In oor Humi ity is measure in the return uct with a sensor built
into the Control. In coor ination with the timer settings, the Control then operates accor ing to the
temperature an humi ity limits shown in D agram 1 below.