Siemens QAF81 Handleiding

Bekijk gratis de handleiding van Siemens QAF81 (4 pagina’s), behorend tot de categorie Thermostaat. Deze gids werd als nuttig beoordeeld door 73 mensen en kreeg gemiddeld 4.0 sterren uit 9 reviews. Heb je een vraag over Siemens QAF81 of wil je andere gebruikers van dit product iets vragen? Stel een vraag

Siemens Building TechnologiesCA1N1284E / 11.1998

Landis & Staefa Division1/4

1

284

Frost thermostatQAF81...

for air temperature monitoring

Frost protection thermostat to prevent frost damage in air conditioning systems

•

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 IP65

The frost protection thermostat 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 thermostat 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

The frost thermostat QAF81... trips when the temperature drops below the selected

setpoint over a capillary length of 30 cm.

An automatic reset occurs when the temperature rises above the setpoint again (manual

reset required with QAF81.6M).

3 types of frost monitor are available. They differ in the length of the capillary and in the

reset:

TypeReset

Capillary length

QAF81.3

automatic reset3 m

QAF81.6

automatic reset6 m

QAF81.6M

with lock-out and manual reset6 m

Use

Typical applications

Functions

Type summary

Product specificaties