Hamworthy Heating

Varmax floor standing boiler

  • Floor standing, high output condensing boiler with a stainless steel heat exchanger.
  • The range consists of 10 single boilers with outputs (at 50/30°C) of 127, 148, 191, 238, 290, 338, 415, 478, 558, 637kW.
  • Hamworthy Web Icons JBs base set BLUE Product-icon-efficiency-96
  • Hamworthy Web Icons JBs base set BLUE-04
  • Hamworthy Web Icons JBs base set BLUE-37
  • Hamworthy Web Icons JBs base set BLUE-48
  • Hamworthy Web Icons JBs base set BLUE-06
  • Hamworthy Web Icons JBs base set BLUE-07
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Product information

  • Improved efficiency on split temperature systems due to high and low temperature return connections.

  • Non-dependent on system flow allowing wide differential temperatures.

  • Easier installation with no requirement for dedicated primary circuit and no minimum flow rates.

  • Touch screen controls for simple, intuitive set up.

  • Quick and easy to disassemble with updated casing access, also meaning easier access for maintenance or service.

  • Tolerant to a wide range of system water conditions with a corrosion resistant stainless steel heat exchanger.

  • Long life backed up by a 5-year heat exchanger warranty.

  • Well insulated for low standby losses.

  • NOx emissions comply with ErP legislation lower than 56mg/kWh.

  • Match heating system loads accurately with outputs up to 637kW from a single boiler and ability to cascade multiple boilers.

  • Simplified flue system design as the flue gas non-return valve is built in to provide effective protection from re-circulation of flue gases through non-firing boilers.

  • Built in boiler sequence controls capable of controlling up to 16 boiler modules, multiple heating circuits and a hot water circuit using the master/slave principle.

  • Quick release access panels for ease of service and maintenance.

  • BIM objects available to assist in design and management.

Ideal uses/applications

Optional extras

  • A large range of off the shelf flue options available

  • Room sealed and open flue solutions

  • Flue header kits

Single Boiler Controls

  • Outside air temperature sensor QAC34 (Part no. 533901457)

  • Domestic Hot Water sensor kit (sensor and pocket) QAZ36 (Part no. 563605674)

  • Mixing valve heating circuit control kit (AVS 75 control module, temperature sensor and pocket) for 1 zone (Part no. 059751)

  • Programmable room sensor QAA75 (Part no. 533901587)

  • Offset adjustable room sensor QAA55 (Part no. 533901589)

Multiple Boiler Controls

  • Outside air temperature sensor QAC34 (Part no. 533901457)

  • Heating circuit sensor kit (sensor and pocket) QAZ36 (Part no. 563605673)

  • Merley boiler sequence controller, wall mounted (Part no. 563605672)

  • LPB Bus communication module OCI345, one required per boiler module (Part no. 563605667)

  • Programmable room sensor QAA75 (Part no. 533901587)

  • Offset adjustable room sensor QAA55 (Part no. 533901589)

  • Choose from a wide range of service contracts to help maintain optimum performance.

  • Book commissioning at the same time as placing your order for improved warranty terms.

  • Energy

    Units

    180

    225

    275

    320

    390

    450

    525

    600

    Building regulations Part L seasonal efficiency

    % gross

    96.3

    96.3

    96.2

    96.2

    96.2

    96.2

    96.2

    96.2

    Boiler output - maximum 80/60°C, NG & LPG*

    kW

    175.9

    219.8

    269.5

    313.6

    382.3

    441.9

    515.6

    589.2

    Boiler output - maximum 50/30°C, NG & LPG*

    kW

    191

    238

    290

    338

    415

    478

    558

    637

    Boiler output - minimum 80/60°C, Nat Gas.

    kW

    43

    43

    66

    66

    87

    87

    120

    120

    Boiler input (gross) - maximum, NG & LPG*

    kW

    180

    225

    275

    320

    390

    450

    525

    600

    Boiler input (net) - maximum, NG & LPG*

    kW

    162

    203

    248

    288

    351

    405

    473

    541

  • Water

    Units

    180

    225

    275

    320

    390

    450

    525

    600

    Water content

    litres

    151

    151

    239

    239

    287

    287

    420

    420

    System design flow rate @ 30°C ΔT rise

    l/s

    1.4

    1.7

    2.1

    2.5

    3

    3.5

    4.08

    4.69

    Water side pressure loss @ 30°C ΔT rise

    mbar

    25

    36

    36

    53

    34

    43

    60

    75

    System design flow rate @ 20°C ΔT rise

    l/s

    2.1

    2.6

    3.2

    3.7

    4.6

    5.3

    6.14

    7

    Water side pressure loss @ 20°C ΔT rise

    mbar

    49.5

    73.5

    110.6

    127.3

    85

    107

    107

    138

    System design flow rate @ 11°C ΔT rise

    l/s

    3.8

    4.7

    5.8

    6.8

    8.3

    9.5

    11.17

    12.77

    Water side pressure loss @ 11°C ΔT rise

    mbar

    188

    268

    271

    393

    255

    321

    335

    450

    Maximum water pressure

    barg

    6

    6

    6

    6

    6

    6

    6

    6

    Maximum flow temperature setting

    °C

    85

    85

    85

    85

    85

    85

    85

    85

  • Gas

    Units

    180

    225

    275

    320

    390

    450

    525

    600

    Gas flow rate, NG (G20) - maximum

    m³/hr

    19.1

    23.8

    29.1

    33.9

    41.3

    47.6

    55.6

    63.5

    Maximum gas inlet pressure, Nat Gas

    mbar

    25

    25

    25

    25

    25

    25

    25

    25

    Nominal inlet pressure, Nat Gas

    mbar

    20

    20

    20

    20

    20

    20

    20

    20

  • Flue

    Units

    180

    225

    275

    320

    390

    450

    525

    600

    Maximum flue gas temperature @ 80/60°C Nat Gas

    °C

    61

    62.3

    61.7

    63.4

    62.5

    64.8

    64.4

    66.6

    Pressure at boiler flue spigot @ 80/60°C Nat Gas B23P

    Pa

    115

    165

    122

    176

    180

    193

    160

    200

    Dry NOx emission**

    mg/kWh

    27

    27

    36

    36

    32

    35

    55

    55

    NOx Class

    6

    6

    6

    6

    6

    6

    6

    6

  • Electrical

    Units

    180

    225

    275

    320

    390

    450

    525

    600

    Electrical supply

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    230V, 1Ph, 50Hz

    Power consumption - maximum boiler modulation

    W

    228

    330

    326

    427

    545

    717

    729

    970

    Approx shipping weight

    kg

    393

    393

    502

    502

    592

    592

    800

    800

    Noise emission @1m: @max. modulation

    dB (A)

    76

    76

    77

    77

    84

    89

    82

    84

Partnerships

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ICOM

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