Wilo-Isar MODH1-2/3

Pressure-boosting system with two or three non-self-priming stainless steel high-pressure multistage centrifugal pumps switched in parallel

• Fully automatic water supply and pressure boosting in inlet mode, either from the public water supply network or from a tank, for domestic, commercial, industrial and municipal applications (e.g. residential, office, administration buildings, hotels, hospitals, trades, industry, water supply companies).
• Pumping drinking water, process water, cooling water or other industrial water, which does not affect the materials used, neither chemically nor mechanically, and does not have any abrasive or long-fibre constituents

• 2 or 3 CH1-L pumps per system
• Components that come in contact with the fluid are corrosion-resistant
• Electrogalvanised base frame with height-adjustable vibration absorbers for insulation against structure-borne noise
• Stop valve on the suction and discharge side of every pump
• Non-return valve, on the discharge side
• Pressure sensor, on the end pressure side
• Pressure gauge optional, on the suction side
• Pressure gauge, on the end pressure side
• Low-water cut-out switchgear, either optional or included, depending on the item
• EC-control with IP54 plastic housing, consisting of an internal power supply unit, microprocessor, analogue and digital input and output modules

• 3~400 V ± 10 %, 50 Hz; 3~380/440 V ±10 %, 60 Hz mains connection, depending on type also 1~230 V, 50/60 Hz (other versions on request)
• Max. fluid temperature 50 °C (70 °C optional)
• Max. ambient temperature 40 °C
• Operating pressure 10 bar
• Inlet pressure 6 bar
• Nominal connection diameter, on the discharge side R 2"/DN 100
• Nominal connection diameter, on the inlet side R 2"/DN 100
• IP rating IP54
• Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
• Approved fluids (other fluids on request). Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.
• Cooling water
• Drinking and process water

Single pump:

• Impellers, stage chambers and pump housing made of stainless steel 1.4301/1.4404
• Shaft of stainless steel 1.4404
• EPDM gasket (EP851)/FKM (Viton)
• Mechanical seal made of tungsten carbide/carbon
• Bearing of tungsten carbide
• Pump support foot made of aluminium

• Base frame: electrogalvanised and with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
• Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework dimensions must correspond to the overall hydraulic performance of the pressure-boosting system
• Pumps: Two or three pumps of the CH1-L series 2.., 4.., 6.., 10.., 16.. switched in parallel; all pump components that come in contact with the fluid are made of 1.4301/1.4404 stainless steel
• Valves: each pump is equipped on the suction and discharge side with a stop valve or with annular shut-off valves and a discharge-side non-return valve
• Diaphragm pressure vessel: 8 l/PN 10 on the discharge side with butyl rubber diaphragm, completely safe according to the food safety regulations; ball valve and drain and throughflow fitting according to DIN 4807 for test and inspection purposes
• Pressure sensor: 4 to 20 mA, on the discharge side for activating the central EC-controller
• Pressure indication: Pressure gauge (ø 63 mm) on the discharge side; additional digital display of the discharge pressure in the alphanumeric display of the EC-controller
• Controller: the system is standard-equipped with an EC-controller

• factory-mounted, ready for connection pressure-boosting system checked for functionality and impermeability
• Installation and operating instructions

Other mains connections on request

• 3~400 V ± 10 %, 50 Hz; 3~380/440 V ±10 %, 60 Hz mains connection, depending on type also 1~230 V, 50/60 Hz (other versions on request)
• Max. fluid temperature 50 °C (70 °C optional)
• Max. ambient temperature 40 °C
• Operating pressure 10 bar
• Inlet pressure 6 bar
• Nominal connection diameter, on the discharge side R 2"/DN 100
• Nominal connection diameter, on the inlet side R 2"/DN 100
• IP rating IP54
• Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
• Approved fluids (other fluids on request). Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.
• Cooling water
• Drinking and process water

Single pump:

• Impellers, stage chambers and pump housing made of stainless steel 1.4301/1.4404
• Shaft of stainless steel 1.4404
• EPDM gasket (EP851)/FKM (Viton)
• Mechanical seal made of tungsten carbide/carbon
• Bearing of tungsten carbide
• Pump support foot made of aluminium

• Base frame: electrogalvanised and with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
• Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework dimensions must correspond to the overall hydraulic performance of the pressure-boosting system
• Pumps: Two or three pumps of the CH1-L series 2.., 4.., 6.., 10.., 16.. switched in parallel; all pump components that come in contact with the fluid are made of 1.4301/1.4404 stainless steel
• Valves: each pump is equipped on the suction and discharge side with a stop valve or with annular shut-off valves and a discharge-side non-return valve
• Diaphragm pressure vessel: 8 l/PN 10 on the discharge side with butyl rubber diaphragm, completely safe according to the food safety regulations; ball valve and drain and throughflow fitting according to DIN 4807 for test and inspection purposes
• Pressure sensor: 4 to 20 mA, on the discharge side for activating the central EC-controller
• Pressure indication: Pressure gauge (ø 63 mm) on the discharge side; additional digital display of the discharge pressure in the alphanumeric display of the EC-controller
• Controller: the system is standard-equipped with an EC-controller

• factory-mounted, ready for connection pressure-boosting system checked for functionality and impermeability
• Installation and operating instructions

Other mains connections on request