Honeywell

Satronic Honeywell MZ770S Photocell Short 40mm

Honeywell

Satronic Honeywell MZ770S Photocell Short 40mm

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£20.00 GBP inc. VAT
64 in stock

Satronic Honeywell MZ770S short 40mm photocell for compatible oil burner flame supervision systems. Commonly used with selected Satronic / Honeywell burner control units and compatible Nu-way, EOGB and Bentone applications.

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Satronic Honeywell MZ770S Photocell Short 40mm

The Satronic Honeywell MZ770S Photocell Short 40mm is a flame detection photocell designed for compatible oil burner control systems. It is used to detect and monitor the oil burner flame during operation, helping the burner control box confirm safe ignition and continued flame presence.

The MZ770S short photocell is commonly used across selected domestic and light commercial oil burner applications and is suitable for compatible Satronic / Honeywell burner control units. This short version has a 40mm body length and a total photocell length of approximately 67.5mm.

This photocell is a key burner safety component and is commonly replaced during oil burner fault-finding where the appliance is experiencing ignition failure, lockout, poor flame detection or intermittent burner operation.

Key Features

  • Satronic / Honeywell MZ770S photocell
  • Short 40mm version
  • Commonly listed as MZ770S short / 50001 / 50001U
  • Used for oil flame supervision
  • Designed for compatible Satronic oil burner control units
  • Pluggable flame monitoring device
  • Suitable for selected oil burner applications
  • Used to detect flame presence during burner operation
  • Helps support safe oil burner ignition and flame monitoring
  • Commonly used during oil burner servicing, repair and fault diagnosis
  • Suitable for compatible Nu-way, EOGB and Bentone burner applications, subject to model confirmation

Product Specification

  • Brand: Satronic / Honeywell
  • Product Type: Photocell / Flame Detector / Photoresistor
  • Model: MZ770S
  • Version: Short 40mm
  • Manufacturer Reference: 50001 / 50001U
  • Trade Kit Reference: S01-MZ770S-2
  • EAN / GTIN: 4046911023239
  • Application: Oil burner flame supervision
  • Compatible Control Type: Selected Satronic / Honeywell oil burner control units
  • Design: Pluggable
  • Photocell Body Length: 40mm
  • Total Length: Approx. 67.5mm
  • Protection Rating: IP41
  • Ambient Temperature Range: -20°C to +60°C
  • Common Burner Suitability: Nu-way, EOGB and Bentone, subject to burner model and control box compatibility
  • Installation: Qualified oil heating engineer / OFTEC registered technician recommended

Suitable For

  • Compatible oil burner control systems
  • Selected Satronic / Honeywell burner control units
  • Selected Nu-way oil burners
  • Selected EOGB oil burners
  • Selected Bentone oil burners
  • Domestic and light commercial oil burner servicing
  • Oil burner fault diagnosis and repair
  • Applications where a short 40mm MZ770S photocell is specified

Common Fault Symptoms

  • Oil burner locking out after ignition attempt
  • Burner lights then shuts down
  • No flame signal detected by the control box
  • Intermittent burner lockout
  • Dirty, weak or failed photocell signal
  • Faulty flame detection during burner start-up
  • Oil burner control box not recognising flame presence

Compatibility Information

This photocell must be matched to the existing burner and control box before fitting. Always check the burner model, existing photocell reference, sensor length, connection type, lead arrangement and control box compatibility before ordering.

The MZ770S photocell is available in different lengths and versions. This listing is for the short 40mm version. If your appliance requires the longer MZ770S version or a different flame detector type, this item may not be suitable.

Important Product Note

This listing is for the Satronic Honeywell MZ770S Photocell Short 40mm. Lead, adaptor, plug or mounting accessories should be checked against the stock supplied and your existing burner setup before installation. Where supplied as a kit, always confirm the included components before fitting.

Photocells can be affected by dirt, soot, poor alignment, incorrect positioning, damaged wiring, burner combustion issues or control box faults. The full burner fault should be diagnosed by a competent engineer before replacing parts.

Professional Installation Required

This oil burner photocell should only be fitted, tested and commissioned by a suitably qualified oil heating engineer. Oil-fired appliance servicing and repairs should be carried out by a competent professional, such as an OFTEC registered technician, in accordance with current regulations, manufacturer instructions and safe working practices.

Delivery Times 
All our deliveries are made by some of the countries most trusted couriers, including Royal Mail, PacelForce, DHL , Fastway Curriers. For most larger sized deliveries, you will receive a call from the courier an hour before the scheduled delivery time.

Free Delivery
Free delivery when you spend £150+ on all our stocked items, up to the maximum 20kg in weight (UK & Ireland Only) To be eligible for this service, you must place your order before 1pm on the previous day. 

Delivery Drop Off
It is important to note that we use external shipping couriers. They are responsible for delivering the item(s) to the kerb-side. They are not responsible for delivering items into your home*.
*Please note, for large orders we advise that you seek assistance from friends or neighbours to assist with moving your order, as often the driver will not be able to assist you. Some items may be delivered on a pallet. It is your responsibility to dispose of the pallet, however, we recommend keeping it for the first 14 days in case you need to return your item(s).

Failed Deliveries
In the unlikely event that delivery is attempted when you are not at home, we will contact you by phone and re-book another time that suits you. Please note, there may be a re-delivery charge added at our discretion, which will be reviewed on a case by case basis.

Direct Deliveries from Distribution Centers
To help you receive your items as quickly as possible, parts of your order may be dispatched directly from a distribution center (Ie) Amazon. If this is the case, you will be contacted directly by them to arrange delivery for the products concerned. Please note, these items will arrive at a different time to products dispatched from our head warehouse. Some distribution centers may take between 2-3 days to deliver items.

Non-Stocked Items
Some items are ordered into our warehouse especially for your orders. This means there may be additional lead times on your order arriving. The estimated delivery time for non-stocked items is 5-7 working days. 
For orders that contain a mixture of stock and non-stock items, excluding items delivered directly from distribution centers, we will deliver all items together. We will make you aware of this when we phone or email you to confirm the delivery date. You will be given the option to receive them separately as well, however there may be additional shipping charges.

Shipping Rates
All Orders to the UK & Ireland *ONLY*up to 20kg £150+ is Free
Pallet Rates are priced on application and order... delivery lead times will also vary based on post code.

Returns
Returns are subject too a 50% re-stocking charge.

  • Items installed/fitted without professional understanding IE Oftec/SafeGas Registered Installer certificates, invalidate any warranty of said item bought.. This is however is at the companies discretion.
  • All products must be inspected within 24hrs. Goods are non-returnable after this period. 

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Goods including but not limited to printed circuit boards, control boxes, chemicals, hazardous materials, flammable liquids or gases. Please ask if you are unsure if you can return your goods.
Some items are not returnable such as PCB Boards and Boilers if they are opened, There also will be a 25% Handling fee for All Items if accepted for return.
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer unless otherwise instructed by Spares Direct.
There are certain situations where only partial refunds are granted (if applicable):

  • Any item not in its original condition, is damaged or missing parts for reasons not due to manufacturer / supplier error.
  • Any item that is returned more than 30 days after delivery

Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund, please contact us at info@sparesdirect.ie

Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.

Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at info@sparesdirect.ie and send your item to: Unit 5 Dargan Industrial Park, 62 Dargan Crescent, Belfast BT3 9JP.

Unwanted goods or Failed deliveries of items bought
If for any reason you order from us and the item has been shipped, but you no longer wish to have the item, the goods should be returned to us at the consumers cost. The price of goods will be refunded upon delivery/inspection (please note carriage cost will NOT be refunded. This also applies to missed deliveries/collection of goods from currier depot. 

Shipping
To return your product, you should mail your product to: Unit 5 Dargan Industrial Park, 62 Dargan Crescent, Belfast BT3 9JP.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over £50, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.