CoilMaster

Twin condensing boiler with high hot water output

Modern living demands energy efficient boilers and enhanced building insulation has shifted the main requirement of gas consumption from heating to hot water, and in many cases the demands of the hot water service exceed that of heating. Therefore it is important to install an appliance that condenses in both heating and hot water mode, achieving the most from every kW input of gas used.

6

NOx class:

104 %
Thermal efficiency in DHW mode
10:1

Modulation ratio up to:

PERFORMANCE

heat input (net) G20/G25 kW 5 - 34,9
heat output at 80/60°C G20 kW 4,9 - 34
heat output at 50/30°C G20 kW 5,4 - 37,6

EFFICIENCY

heating efficiency 80/60°C % 97,2 - 97,3
heating efficiency 50/30°C % 108,3 - 107,8
useful efficiency at 30% (return 30°C) % 108,3
seasonal efficiency % 92,4

GENERAL

seasonal space heating energy efficiency class A
water heating efficiency class A
gas category I2E(S), I2E, I2Er, I2H, I3P, II2E3P, II2EK3P, II2ELL3P, II2Esi3P, II2H3P, II2L3P
gas type G20 - G25 - G25.3 - G31
chimney type B23 - B23p - C13 - C33 - C43 - C53 - C63 - C83 - C93
primary water content l 43,6
Domestic hot water content l 10,6
CO emission mg/kWh 5,2
NOx class 6
max DHW operating temperature °C 80
max operating pressure heating (primary) bar 3
max operating pressure (DHW) bar 8
voltage V 230

DOMESTIC HOT WATER PERFORMANCE

1st hour and continuous hour at 40°C I/min 17,8
1st hour and continuous hour at 60°C I/min 10
water heating efficiency % 104
load profile for water heating XXL

DIMENSIONS

boiler width [A] mm 602
boiler height [B] mm 1604
boiler depth [C] mm 641
dry weight kg 180

CONNECTIONS

chimney connection mm 80/125
gas connection in 3/4
pressure relief valve connection primary side in 1
pressure relief valve connection DHW side in 3/4
DHW outlet in 3/4
primary circuit outlet in 1
DHW inlet in 3/4
primary circuit inlet in 1
CoilMaster CM 35

ERP Labels (1)

Certificates (1)

Current technical manuals (2)

Schematics (1)

References (1)

Sales Brochures (1)

Stainless steel

Coil Fire Tube - the heart of CoilMaster is made of ferritic stainless steel, which includes 18% chromium in its composition. This element helps to protect the lifespan of these gas fired appliances. Ferritic stainless steel guarantees sufficient resistance to commonly found corrosion and thermal expansion issues. Stainless steel is fast becoming the material of choice for gas fired heat exchangers by both engineers and designers.

The self-cleaning flue ways of the Coil Fire Tube also simplifies routine maintenance operations and related costs, offering maximum efficiency over the entire life span the boiler.

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High DHW performance without additional storage requirements

Great output from a small unit, able to satisfy high heating and DHW requirements without the need install additional storage. All the advantages of condensing technology in both heating and DHW modes, combined with high volumes of instantaneous DHW. The CoilMaster minimises the risk of fouling thanks to the indirect heat exchanger, and the risk of legionella is eliminated.

Key Features & Benefits

  • High DHW production 3.270 l/h
  • Useful efficiency in DHW mode 104%
  • Internal circuit piping in welded stainless steel
  • Coil Fire Tube heat exchanger in stainless steel
  • Self-cleaning flue ways, anti-legionella
  • Low pressure drop
  • Low NOx
  • Compact dimensions

Domestic hot water always in condensing mode

Exceptional output from a compact unit, able to satisfy high heating and DHW requirements without the need install additional storage. All the advantages of condensing technology in both heating and DHW modes, delivering high volumes of efficient instantaneous DHW. The CoilMaster minimises the risk of fouling thanks to the indirect heat exchanger, and the risk of legionella is eliminated.
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Domestic hot water always in condensing mode

The stainless steel domestic hot water coil is completely immersed in the primary circuit and ensures effective condensation thanks to the low temperatures of inlet water. The high production of continuous DHW is delivered consistently by utilising the large heat exchange surface, protecting the coil itself from the harmful limescale deposits which would significantly reduce performance and increase costs over time.

The threat of legionella is negated due to the high operating temperature of both the primary and domestic circuits, allowing for high volume, rapid hot water production.
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