Step 6. configure devices, Step 7. troubleshooting, Alarms – Honeywell W7761A User Manual
Page 36
EXCEL 10 W7761A INPUT/OUTPUT DEVICE
36
74-2699
Table 8. Excel 10 W7761A Device Ordering Information (Continued).
Part Number
Product Description
Comments
Cabling (Continued):
Honeywell AK3752
(typical or equivalent)
Outputs/Power: 14 to 18 AWG (2.0 to 1.0 mm
2
)
NEC Class 2 140°F (60°C) rating
Honeywell AK3702
(typical or equivalent)
18 AWG (1.0 mm
2
) twisted pair
Non-plenum
Honeywell AK3712
(typical or equivalent)
16 AWG (1.3 mm
2
) twisted pair
Non-plenum
Honeywell AK3754
(typical or equivalent)
14 AWG (2.0 mm
2
) two conductor
Non-plenum
Step 6. Configure Devices
Excel E-Vision PC Software is used to configure W7761A Devices to match their intended application. The E-Vision User
Guide form, 74-2588 provides details for operating the PC software.
Step 7. Troubleshooting
Troubleshooting Excel 10 Controllers and Wall Modules
In addition to the following information, refer to the Installation Instructions and Checkout and Test manual for each product.
See the Applicable Literature section for form numbers.
Temperature Sensor and Setpoint Potentiometer Resistance Ranges
The T7770 Wall Module or the C7770A Air Temperature Sensor has the following specified calibration points, which are plotted
in Fig. 23:
Temperature (°F)
Resistance Value (ohms)
99
11,520
85
16,301
70
24,039
55
36,280
45
48,000
TEMPERATURE (DEGREES)
o
F
30
40
50
60
70
80
90
100
110
0
10
20
30
40
RESISTANCE (OHMS)
20K OHM AT
77
o
F (25
o
C)
80K
70K
60K
50K
40K
30K
20K
10K
o
C
M5874A
Fig. 23. Temperature sensor resistance plots.
Alarms
When an Excel 10 has an alarm condition, it reports it to the central node on the E-Bus (typically, the Excel 10 Zone Manager).
See Table 9. Information contained in an alarm message is:
•
Subnet Number:
E-Bus subnet that contains the Excel 10 node that has the alarm condition. Subnet 1 is on the Zone Manager side of the
router; Subnet 2 is on the other side.
•
Node Number:
Excel 10 node that has the alarm condition (see Network Status).
•
Alarm Type:
Specific alarm being issued. An Excel 10 can provide the alarm types listed in Table 9.