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MODEL 8145 – TEST MODE
After wiring and set up have been completed, Test Mode can be used to verify that all components in the ventilation system function and that wiring
to the HVAC system fan is correct .
1
Hold for 5 seconds .
TABLE 2 – MODEL 8145 TEST MODE MENU
Test Sequence
Description
Shows outdoor temperature or - - - - °F if no
separate outdoor temperature sensor has been
HP
°F
installed . Model 8145 installations do not require a
HC %
separate sensor – outdoor temperature is measured
by the control's on-board sensor .
tESt shows on the display, the green Fresh Air LED
will light and either the damper will open or the
power ventilator will turn on depending on what
has been wired to the VENT terminals .
MEASURE DELIVERED AIRFLOW
1. Make sure the ventilator is plugged in and wired to an external control (Model 8145NC) or that
the integral control is wired to the HVAC system (Model 8145) .
2. Use 1/4" flexible tubing to attach a pressure gauge set to " w . c . (sometimes shown as "in . w . g . "
or "in . H2O") to the inlet and outlet pressure ports on the ventilator . The pressure gauge should
have as small a range as possible to get a meaningful measurement – a range of 1 . 0 " w . c . should
be sufficient . Connect the high or "+" port of the gauge to the outlet pressure port on the
ventilator, and the low or "-" port of the gauge to the inlet pressure port on the ventilator . See
FIGURE 13 .
3. Model 8145NC – Turn on the ventilator using the installed control for the Model 8145NC . This
can be done by temporarily changing the ventilation setting to 60 minutes/hour or you can
simply place a jumper between the VENT terminals of the ventilator .
Model 8145 – Turn on the ventilator by using the "Up" button to increase the ventilation setting
to 60 MIN . / HR .
4. Use the label on the cover of the ventilator, or TABLE 3, to convert the pressure reading to
delivered airflow . If the pressure reading false between listed values, either use the lower value
or interpolate between values: CFM = Lower Value + [(Higher Value – Lower Value) * 10 *
(Pressure Reading – Lower Value Pressure)] . The following is an example:
a. Measured Pressure Reading is 0 . 3 4" w . c .
b. Table 3 lists 200 CFM @ 0 . 3 " w . c . and 170 @ 0 . 4 " w . c .
c. Either use 170 CFM or interpolate:
CFM = 200 - [(200-170) * 10 * (0 . 3 4-0 . 3 )] = 200 - [(30) * 10 * (0 . 0 4)] = 200 - 12 = 188 CFM
Interpolating will demonstrate higher delivered airflow, but requires a calculation to be done .
8 English
2
TABLE 2 – MODEL 8145 TEST MODE MENU
Test Sequence
MEASURED REQ'D CONT CFM
CODE
3
Description
After 15 seconds, the HVAC fan will turn on if it has
been wired and set up to do so . The display will
show FAN along with tESt .
FAN
After 45 seconds Test Mode automatically
completes and the display returns to the operating
MIN/
display .
HR
FIGURE 13 – MEASURE PRESSURE AT
INLET AND OUTLET PRESSURE PORTS
Lo
- +
TABLE 3 – DELIVERED AIRFLOW
CORRESPONDING TO MEASURED PRESSURE
AT VENTILATOR PRESSURE PORTS
Measured Pressure
(" w.c.)
0 . 1
0 . 2
0 . 3
0 . 4
0 . 5
0 . 6
0 . 7
Hi
90-2520
Delivered Airflow
(CFM)
255
225
200
170
145
115
90
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