Blower Status Switch; Table 6; Figure 28 Dirty Filter Switch And Blower Status Switch; Figure 29 Verifying Differential Airflow Status - Bard MEGA-TEC W180B Service Instructions Manual

TABLE 6

Rated Airflow

Nominal Rated CFM
High
W180B 5400
TABLE 7

Indoor Blower Performance

ESP
(Inch H
W180B 0.35
TABLE 8
Maximum ESP of Operation
Electric Heat Only
Model
-N0Z
-N09
-N18
-N36
-Q0Z
-Q09
-Q18
-Q36
-S0Z
-S09
-S18
-S36
-T0Z
-T09
-T18
-T36
* Unit is rated for free blow non-ducted operation with
SG-15W Supply Grille and RG-15W Return Grille.

Blower Status Switch

The unit is equipped with a differential pressure airflow
switch to monitor the blower (see Figure 28). If the
blower is turned on and the switch doesn't open to
indicate there is differential pressure between the inlet
and outlet of the blower, an alarm will be generated.
For switch settings, see Figure 28.
Manual 2100-749
Page 20 of 68
Nominal Rated ESP
Low
3280 0.35
Dry Wet
0) Coil Coil
2
8190 N/A
Static Pressure ("WC)*
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
1.00"
FIGURE 28
Dirty Filter Switch and Blower Status Switch
Left and Right Dirty
Filter Switches
(W180 Set @ 1.40)
Differential airflow status can be viewed by:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
TECHNICIAN password 1313.
3. Press UP or DOWN keys to scroll to I/O Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Digital Inputs
C1-1; press ENTER key.
5. Reference AIrflw 1 row and Val column (see Figure
29).
FIGURE 29
Verifying Differential Airflow Status
Left and Right Blower
Status Switches
(W180 Set @ 0.40)