Tryska DC0121

Product detailed description

The Atmos DC0121 combustion nozzle is a replacement part for a range of solid fuel boilers in the Atmos product line. It is typically used in residential and commercial heating systems where controlled combustion is essential for efficient operation. Installers working on older Atmos models will find this nozzle suitable for systems requiring precise air flow management and stable flame patterns. The ceramic construction provides thermal resistance and durability under high-temperature conditions.

When replacing the nozzle, it is important to match the model and production date of the boiler to ensure compatibility. The DC0121 is specifically designed for pre-2019 versions of the DC18S, DC18SP(L), DC18GD, DC20GS, DC22SX, GS20, DC18GSE, DC22GSE, DC25GSE and DC18GSP(L) models. The nozzle is supplied with sealing gaskets and three sealing strings to ensure airtight connections at the sides and front of the boiler.

Technical parameters

Weight	14.5 kg
Code	DC0121
Brand	Atmos

The weight of 14.5 kg indicates the robust ceramic construction of the nozzle. The external dimensions (390 mm length, 190 mm width) and the nozzle opening (140 mm length, 34 mm width) are critical for ensuring correct fit and airflow characteristics. These dimensions are essential for proper sizing and selection to maintain the boiler's combustion efficiency and safety.

Installation and connection

The installation process involves removing the old nozzle and fitting the DC0121 in its place. The supplied sealing gaskets and strings must be correctly positioned to prevent air leaks. It is important to verify the model and production date of the boiler to confirm compatibility. Common installation errors include incorrect sealing, which can lead to reduced efficiency or unsafe operation. The nozzle is mounted directly into the boiler casing and secured with the provided sealing materials.

Compatibility and accessories

The DC0121 is compatible with pre-2019 versions of the DC18S, DC18SP(L), DC18GD, DC20GS, DC22SX, GS20, DC18GSE, DC22GSE, DC25GSE and DC18GSP(L) models. For DC25GSE boilers produced after 15 April 2012, the DC0126 nozzle is required. For DC18S boilers produced after 1 January 2019, the DC0149 model is the correct replacement. The package includes sealing gaskets and three sealing strings for installation.

Technical background for designers

The DC0121 is a ceramic combustion nozzle designed to regulate air flow and support stable combustion in solid fuel boilers. The ceramic material offers high thermal resistance and durability under repeated heating cycles. The nozzle integrates into the boiler's combustion chamber, where it controls the air-to-fuel ratio to optimise efficiency. The design and material choice influence the service life and performance of the boiler, particularly in systems with high thermal loads.

Service and operation

Regular inspection of the nozzle is recommended to ensure that the sealing materials remain intact and that there are no cracks or deformations in the ceramic structure. Any signs of wear or damage should be addressed promptly to prevent inefficiency or safety issues. The sealing gaskets and strings should be replaced if they show signs of deterioration.

Frequently asked questions

Can the Atmos DC0121 be used with DC25GSE boilers produced after 15 April 2012?
No, the DC0126 nozzle is required for DC25GSE boilers produced after 15 April 2012.

Is the Atmos DC0121 compatible with DC18S boilers produced after 1 January 2019?
No, the DC0149 nozzle is required for DC18S boilers produced after 1 January 2019.

What sealing materials are included with the Atmos DC0121?
The package includes one sealing gasket and three sealing strings for installation.

What are the external dimensions of the Atmos DC0121?
The external dimensions are 390 mm in length and 190 mm in width.