Lennox G32V Series Service Literature page 16

NOTE−On Harmony II zoning applications in the heating mode,
the highest speed obtainable is the same as the highest cool-
ing speed selection. Also, the heating speed (heat jumper posi-
tion) is only used when the primary limit has been tripped. In
non−zoning applications, refer to the section on the VSP2−1
control.
Jumper Settings
IMPORTANT
Before changing jumper setting, make sure the
motor has completely stopped. Any jumper set-
ting change will not take place while the motor
is running.
To change jumper positions, gently pull the jumper off the pins
and place it on the desired set of pins. The following section
outlines the different jumper selections available and condi-
tions associated with each one. Refer to figure 11 for identifica-
tion.
After the CFM for each application has been determined, the
jumper settings must be adjusted to reflect those given in
the tables on page 3. Using the tables, determine which row
of CFM volumes most closely matches the desired CFM.
Once a specific row has been chosen (NORMAL or −),
CFM volumes from other rows cannot be used. Below are
the descriptions of each of the jumper selections.
Refer to table 11 for factory settings. Refer to the tables on
page 3 for the approximate air volume for each setting.
TABLE 11
VSP2−1 FACTORY SETTINGS
MODEL
HIGH LOW
NUMBER
G32V3-75
4
G32V5-100 4
G32V5-120 4
a− ADJUST"
The ADJUST pins allow the motor to run at normal speed or
approximately 15% lower than normal speed. The tables on
page 2 give two rows (NORMAL and −) with their respective
CFM volumes. The + adjustment setting is not operable.
Notice that the normal adjustment setting for heat speed
position #3 is 2000 CFM (944 L/s). After the adjustment set-
ting has been determined, chose the remaining speed
jumper settings from those offered in the table.
The TEST pin is available to bypass the VSP2−1 control and
run the motor at approximately 70% to test that the motor is
operational. This is beneficial primarily in troubleshoot-
ing. G must be energized for motor to run.
b− HEATING BLOWER"
For G32V units, place the HEATING BLOWER jumper
across the second and third pins (position #2).
ADJUST HEAT
3
2
NORM
2 1
NORM
3
2
NORM
When W1 is energized, the LOW jumper selections are ac-
tivated. The HEAT jumper selections are activated when
W2 is energized.
NOTE−In Harmony II zoning applications, HEATING
BLOWER jumper must be in position #2.
c− HEAT"
The HEAT jumper is used to set the blower speed to ob-
tain the required CFM as outlined in HEAT SPEED sec-
tion of the tables on page 3.
The HEAT jumper selections are activated with a call for
second-stage heating (W2).
IMPORTANT
Before changing jumper setting, make sure the
motor has completely stopped. Any jumper set-
ting change will not take place while the motor is
running.
d− HIGH"
The HIGH jumper is used to determine the CFM during
cooling speed. These jumper selections are activated when
G and DS terminals are energized.
e− LOW"
The LOW jumper is used to determine CFM during low
speed cooling. These jumper selections are activated when
G is energized. The LOW jumper may also be used for low
speed heating. See the HEAT" section for details.
f−FAN OFF"
Fan OFF" timings (time that the blower operates after the
heat demand has been satisfied) are determined by the ar-
rangement of a jumper on the VSP2−1 board. See figure 13.
To adjust fan OFF" timings, gently disconnect the jumper
and reposition it across pins corresponding with the new
timing. Fan OFF" time is adjustable from 90 to 330 sec-
onds. The control has a non−adjustable, factory preset on"
fan timing (45 seconds).
WARNING − MAKE SURE TO DISCONNECT POWER
BEFORE CHANGING FAN OFF" TIMINGS.
FAN-OFF TIME ADJUSTMENT
TIMING
JUMPER
270
150
Page 16
To adjust fan−off timings:
Remove jumper from VSP2−1 and
select one of the other pin com-
binations to achieve the desired
time.
Leave jumper off to achieve
210
330 second fan−off timing.
TIMING PINS (seconds)
Fan-off timing is factory
set at 90 seconds
90
FIGURE 13