SDCHENXUAN PRODUCTS
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HONEYWELL PRODUCTS
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ABB PRODUCTS
REGIN PRODUCTS
Frost Units QAF81.3 QAF81.6 QAF81.6M
Frost Units QAF81 ... for air temperature monitoring
- Robust aluminium die-cast housing
- Responds to temperature change sensed over any 30 cm length of
- capillary
- Small switching differential
- Good repeatability
- Setpoint adjustment (5...15 °C)
- Protection standard IP54 (65)
use
The frost unit QAF81... for air-side monitoring of the temperature of LTHW heating coils in ventilation and air conditioning systems is used to prevent frost damage. It has a small switching differential and good repeatability. The reset occurs automatically (manual reset required with QAF81.6M).
The frost unit can be used to initiate the following frost protection functions:
– Stop fan
– Close outside air dampers
– Open heating coil valve 100 %
– Start heating coil pump
– Switch off chiller (condenser) and humidifier
– Trip visual and/or audible frost alarm
Type summary
|
Typ reference |
Reset |
Capillary length |
|
QAF81.3 |
automatic reset |
3 m |
|
QAF81.6 |
automatic reset |
6 m |
|
QAF81.6M |
with lock-out and manual reset |
6 m |
Frost Units QAF81 ... for air temperature monitoring
- Robust aluminium die-cast housing
- Responds to temperature change sensed over any 30 cm length of
- capillary
- Small switching differential
- Good repeatability
- Setpoint adjustment (5...15 °C)
- Protection standard IP54 (65)
use
The frost unit QAF81... for air-side monitoring of the temperature of LTHW heating coils in ventilation and air conditioning systems is used to prevent frost damage. It has a small switching differential and good repeatability. The reset occurs automatically (manual reset required with QAF81.6M).
The frost unit can be used to initiate the following frost protection functions:
– Stop fan
– Close outside air dampers
– Open heating coil valve 100 %
– Start heating coil pump
– Switch off chiller (condenser) and humidifier
– Trip visual and/or audible frost alarm
Type summary
|
Typ reference |
Reset |
Capillary length |
|
QAF81.3 |
automatic reset |
3 m |
|
QAF81.6 |
automatic reset |
6 m |
|
QAF81.6M |
with lock-out and manual reset |
6 m |