Manual 2100-549Q
Page
39 of 69
SETTING THE VENTILATION CFM
LEVELS
The I-TEC CRV has four pre-set levels of ventilation
CFM available. These are 300, 375, 450 and 525
CFM of ventilation air. This ventilation package
is shipped from the factory set on the 375 CFM
ventilation level while the economizer portion is set
on the 525 CFM ventilation level. To change between
these four different levels of provided ventilation CFM,
refer to Figure 24 to look up the corresponding CFM
needed for the intake and exhaust blowers to meet the
design criteria and determine which “speed/wire color”
is needed.
Perform the following steps:
1. Open front swinging doors of main unit (by popping
front door latches).
2. Throw main power disconnect to the “OFF”
position to eliminate risk of injury or death due to
electrical shock.
3. Remove six (6) screws holding front CRV door in
place (see Figure 22).
4. For CRV blower speed, locate brown wire with
white trace that has as black terminal on the end
where it connects to the terminal strip (see Figure
24).
5. Move the brown wire with white trace to the
corresponding CFM level needed in accordance
with Figure 24.
6. For economizer blower speed, locate pink wire that
has a black terminal on the end where it connects
to the terminal strip (see Figure 24).
7. Move the pink wire to the corresponding CFM level
needed in accordance with Figure 24.
FIGURE 24
Motor Speed/CFM Configuration
MED. HI
7961-7554
M
OTO
R
SPEE
DS
LO
MED. LO
HI
375
VENT OPTION INTAKE/EXHAUST SPEEDS
BROWN/WHITE
BLACK
BLUE
ORANGE
RED
HI
BLACK
BLUE
SPEED
NOM. CFM
RED
WIRE WITH WHITE TRACE.
300
WIRE COLOR
450
525
LO
MED-LO
MED-HI
ORANGE
Move brown/white wire to corresponding motor
speed for required ventilation CFM. Factory
setting is Medium Lo (375 CFM).
TO CHANGE SPEEDS, MOVE BROWN
7961-755-2
PINK
Move pink wire to corresponding motor
speed for required economizer operation CFM.
Factory setting is High (525 CFM).
MIS-3271
Open disconnect to shut all power OFF before
doing this! Failure to do so could result in
injury or death due to electrical shock.
