Honeywell 5821 - Wireless Temperature Sensor and Water Sensor - Alarm Grid
Honeywell 5821 - Wireless Temperature Sensor and Water Sensor - Alarm Grid
Honeywell 5821 is a wireless temperature and water sensor for those who want to monitor freezing and flooding. In stock and ready to ship!.
The Honeywell 5821 is a wireless transmitter with the ability to monitor temperature and/or flood conditions. The 5821 wireless sensor can either be used as a standalone temperature sensor. It can also be used in combination with the T280R temperature sensor probe or with a 470PB or FP280 water/flood probe. Only one external probe, temperature or flood, can be used with each 5821. There are no probes included with the unit.
The 470PB or FP280, each sold separately, can be hardwired to the 5821 and configured for flood detection. The 5821 ships with a 2.2M Ohm resistor which must be wired in parallel with the 470PB flood probe when that probe is used. The 470PB does not come with the wire needed to connect it to the 5821.
On the other hand, the FP280 comes with a 16.5-foot cable that already has the 2.2M Ohm resistor wired in parallel. All the installer has to do is connect it to the probe terminals on the 5821. Honeywell created the FP280 to make it easier for end users and DIYers to set up flood detection. The 5821's dip switch settings along with the programmed loop number of the wireless zone will determine which type of protection the 5821 wireless transmitter is providing.
The following table shows the various operating modes available on the 5821:
Sensing
Probe✝
Loop Number
Dip 1
Dip 2
Cold & Hot
NA
1 - Cold2 - Hot
OFF
OFF
Flood Sensing
Flood
FP280 or 470PB✝✝
3
OFF
ON
Cold & Flood
FP280 or 470PB✝✝
1 - Cold2 - Flood
OFF
ON
Temperature Sensing
Cold
NA
1
OFF
OFF
Hot
NA
2
OFF
OFF
Warm
NA
2
ON
OFF
Freezer
T280R or TS300R
2
OFF
ON
Refrigerator
T280R or TS300R
2
ON
ON
Cold & Hot
NA
1 - Cold2 - Hot
OFF
OFF
Cold & Warm
NA
1 - Cold2 - Warm
ON
OFF
Cold & Freezer
T280R or TS300R
1 - Cold2 - Freezer
OFF
ON
Cold & Refrigerator
T280R or TS300R
1 - Cold2 - Refrigerator
ON
ON
✝When an external probe is used, an open-circuit or a short-circuit of the probe's wiring (or at the terminals) results in an alarm on that loop, and a trouble condition on all other programmed loops.
✝✝Probe must be shunted by 2.2M Ohm resistor (included with 5821). Use a maximum wire length of 48 inches (1.2m) between the 5821 and any flood probe.
Without any probe, the internal temperature sensor of the wireless Honeywell 5821 can be used to monitor the protected room's ambient temperature. As a standalone temperature sensor, the 5821 can monitor cold, warm, or hot temperatures.
The following table shows the fault and restore thresholds for the 5821 in its various uses:
Operating Mode
Fault Occurs When
For More Than
Restores When
For More Than
Flood
Probe Contacts Water
3 Minutes
No Contact With Water
3 Minutes
Temperature
Cold
Below 45°F (7°C)
10 Minutes
Above 48°F (9°C)
4 Minutes
Hot
Above 95°F (35°C)
Below 92°F (33°C)
Warm
Above 75°F (24°C)
Below 72°F (22°C)
Freezer
Above 10°F (-12°C)
30 Minutes
Below 7°F (-14°C)
Refrigerator
Above 42°F (6°C)
Below 39°F (4°C)
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