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Siemens QAF81.6

Name: QAF81.6
Brand: Siemens
SKU: QAF81.6
Price: 135.58 GBP
Availability: OutOfStock

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Marvo Stock ID MV-1GE2

HS Code 85389091

SKU QAF81.6

Warranty 12 months

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Specification & Description

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Commonly Asked Questions

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Customer Reviews

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Specification & Description

Specification	Description
Part Number	QAF81.6
Manufacturer	Siemens
Part Type	Frost Monitor
Application	Air temperature monitoring for HVAC systems to prevent frost damage
Housing Material	Aluminium alloy
Sensing Length	Approximately 30 - 100 cm
Switching Hysteresis	2 ±1 °C (3.6 ±1.8 °F)
Repeatability	±0.5 °C (±0.9 °F)
Setpoint Range	-5...+15 °C (23...59 °F)
Factory Setting	5 °C (41 °F)
Capillary Length	6 m
Switch Type	Single-pole changeover contacts
Contact Rating	AC 250 V / 15 (1.2) A, DC 30 V / 15 (1.5) A
Reset Mechanism	Automatic
External Fuse	Slow-blow fuse max. 10 A or circuit breaker max. 13 A (characteristic B, C, D)
Allowed Medium	Air
Mounting Position	Any
Electrical Connection	Screw terminals for 1.5 mm² cable
Cable Entry	Threaded entry M20 x 1.5
Protection Class	I according to EN 60730-1
Enclosure Protection	IP54 (IP65 with optional cable gland)
Standards	EN 60730-1
Operating Temperature	Max. 70 °C (158 °F), Min. w + min. 2 °C (min. 3.6 °F)
Storage Temperature	-30...+70 °C (-22...+158 °F)
Destruction Limit	140 °C (284 °F)
Weight	0.9 kg (including packaging)
Maintenance	Maintenance-free

The Siemens QAF81.6 Frost Monitor is a robust and reliable solution designed to safeguard air handling units and ventilation systems from frost damage. Housed in a durable aluminium alloy casing, this frost monitor is engineered to detect temperature drops along its 6-metre capillary tube, ensuring comprehensive monitoring across the entire length.

With an adjustable setpoint range of -5 to +15°C, the QAF81.6 offers precise control and high reproducibility, making it ideal for various HVAC applications. The device features a small switching hysteresis and automatic reset functionality, ensuring seamless operation and minimal maintenance.

The QAF81.6 is equipped with a single-pole changeover contact switch, capable of handling AC 250V/15A and DC 30V/15A, providing versatile integration options. Its IP54 protection rating, which can be enhanced to IP65 with an optional cable gland, ensures reliable performance in demanding environments.

Designed for easy installation, the frost monitor includes screw terminals for secure electrical connections and can be mounted in any position. The QAF81.6 is an essential component for maintaining the efficiency and longevity of your HVAC systems, preventing costly frost-related damages.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

What payment methods do you accept?

We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

Is Marvo a credible parts supplier?

Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Learn more about Marvo

Our service to you

Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

No-Risk Returns, Guaranteed: Return your parts anytime for a full refund. Our hassle-free return policy ensures you’re never stuck with something you don’t need.

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Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the primary function of this part?

The Siemens QAF81.6 is a frost monitor designed to prevent frost damage in HVAC systems by monitoring air temperature.

What is the temperature range for this frost monitor?

The temperature range for the Siemens QAF81.6 is -5 to +15 °C (23 to 59 °F).

How does the frost monitor reset?

The Siemens QAF81.6 features an automatic reset mechanism.

What type of environments is this frost monitor suitable for?

The Siemens QAF81.6 is suitable for residential, commercial, light-industrial, and industrial environments.

What is the protection class of this frost monitor?

The Siemens QAF81.6 has a protection class of IP54, and it can be upgraded to IP65 with an additional cable gland.

What is the length of the capillary tube for this frost monitor?

The Siemens QAF81.6 comes with a 6-meter capillary tube.

What is the switching hysteresis of this frost monitor?

The switching hysteresis of the Siemens QAF81.6 is 2 ±1 °C (3.6 ±1.8 °F).

What materials are used in the construction of this frost monitor?

The Siemens QAF81.6 is constructed with an aluminium alloy housing, a copper membrane, and a copper capillary filled with Freon R134a.

What are the typical applications for this frost monitor?

Typical applications for the Siemens QAF81.6 include monitoring air temperature in HVAC systems to prevent frost damage to heat exchangers.

Does this frost monitor require maintenance?

The Siemens QAF81.6 is maintenance-free.

Part conditions explained

We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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