Manual 2100-749
Page
20 of 68
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.
TABLE 6
Rated Airflow
Nominal Rated CFM
Nominal Rated ESP
High
Low
W180B
5400
3280
0.35
TABLE 8
Maximum ESP of Operation
Electric Heat Only
* Unit is rated for free blow non-ducted operation with
SG-15W Supply Grille and RG-15W Return Grille.
Model
Static Pressure ("WC)*
-N0Z
-N09
-N18
-N36
1.00"
1.00"
1.00"
1.00"
-Q0Z
-Q09
-Q18
-Q36
1.00"
1.00"
1.00"
1.00"
-S0Z
-S09
-S18
-S36
1.00"
1.00"
1.00"
1.00"
-T0Z
-T09
-T18
-T36
1.00"
1.00"
1.00"
1.00"
TABLE 7
Indoor Blower Performance
ESP
(Inch H
2
0)
Dry
Coil
Wet
Coil
W180B
0.35
8190
N/A
FIGURE 29
Verifying Differential Airflow Status
FIGURE 28
Dirty Filter Switch and Blower Status Switch
Left and Right Dirty
Filter Switches
(W180 Set @ 1.40)
Left and Right Blower
Status Switches
(W180 Set @ 0.40)
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).
