Calculating Air Flow; Adjusting Blower Speeds On Ecm 2.3 / Eon Blower Motors - Napoleon 9700 B series Installation And Operating Instructions Manual

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18.2 CALCULATING AIR FLOW

There are circumstances where it may be desirable to know the air fl ow delivery through the duct system,
such as when estimating the amount of air fl ow available for
IOM
IOM
air conditioning. This can be done by direct measurement with
electronic or sloped manometers and velometers, or by counting
the number of times the Amber CFM LED on the control board
fl ashes when equipped with ECM 2.3 / EON motor. Each fl ash
signifi es 100 CFM; count the fl ashes and multiply by 100 to
determine the actual CFM delivered (for example: 10 fl ashes x
100 = 1000 CFM), or use the formula in the next column.

18.3 ADJUSTING BLOWER SPEEDS ON ECM 2.3 / EON BLOWER MOTORS

DISCONNECT THE ELECTRICAL SUPPLY TO THE FURNACE BEFORE ATTEMPTING TO
CHANGE THE BLOWER SPEED. FAILURE TO DO SO COULD RESULT IN ELECTRICAL
This unit is factory set to run at the middle of the heating temperature rise range
as listed on the rating plate. The cooling speed is set to the maximum airfl ow
designated in the model number.
Three sets of 4 position movable jumpers are provided for Heat, Cool, and Adjust
taps for a variable speed motor. These tap jumpers apply signals to the ECM
motor without other interaction with the control board.
If the blower speeds require adjustment, follow these steps:
1. Remove the blower compartment door.
2. Locate the 4 position movable HEAT jumper to adjust heat speed.
3. Remove the jumper from position A and place it on the
corresponding letter B, C, or D as required. Refer to TABLE 8 -
HEATING SPEEDS.
4. To adjust the cooling airfl ow ECM 2.3 / EON, remove the COOL
jumper from position A, and place it on the corresponding letter
B, C, or D. Refer to Table 7A and 7B.
Moving the ADJUST jumper from the NORM to the (+) or (-) position
will cause the airfl ow to be increased or lowered by 15%.
The TEST position on the ADJUST tap is not used.
FIGURE 36 - INTEGRATED FURNACE IGNITION CONTROL
PARK
TERMINALS
ELECTRONIC
AIR CLEANER
POWER
HUMIDIFIER
120 VAC
MOLEX
120 VAC NEUTRAL
CONNECTIONS
W415-1243 / A / 03.19.15
WARNING
!
SHOCK RESULTING IN PERSONAL INJURY OR LOSS OF LIFE.
5A FUSE
RED STATUS
HEAT STAGING
LED
JUMPER P5
CFM =
where:
• CFM is airfl ow in cubic feet per minute;
• ∆T is the temperature rise; and
utput is the furnace output capacity
• O
from the rating plate
!
TABLE 8 - HEATING SPEEDS ECM 2.3 / EON
ALL MODELS ECM
HEAT
Jumper
A
B
C
D
Note: Moving the ADJUST jumper from the NORM posi-
H22.6.2A
tion to the (+) or (-) position will increase or lower the
temperature rise by 15%
24 VAC MOLEX
FIGURE 39
ICM
INTERFACE
THERMOSTAT
TERMINALS
FAULT CODE
BUTTON
Output
∆T
1.085 x
.
H22.2.2A
H3.77
NOTE:
Temperature rise should
always be re-checked
whenever blower speed
is changed.
ESP 0.1" to 1.0" w.c.
Low-Fire ▲T High-Fire ▲T
ADJUST
Range 25-55°F Range 35-65°F
Jumper
(14-31°C) (20-36°C)
NORM 35°F (20°C) 50°F (28°C)
NORM 40°F (22°C) 45°F (25°C)
NORM 45°F (25°C) 55°F (31°C)
NORM 50°F (28°C) 60°F (33°C)
H12.7.1A