IBO OHI 32/60-180

Product detailed description

This circulation pump is commonly used in residential and small commercial buildings for central heating and domestic hot water systems. It is ideal for installations where variable flow rates are required to match system demand. The pump operates efficiently in both closed-loop heating circuits and open water distribution systems. Its compact dimensions allow for flexible mounting in mechanical rooms, under floors or in boiler houses. The three-speed setting allows for adaptation to different system loads and pipe layouts. The pump is designed for environments with fluctuating thermal demands and is compatible with traditional boilers and modern condensing units.

Its IP44 protection rating ensures safe operation in damp conditions, making it suitable for installation near radiators or in utility areas. The cast iron body with anti-corrosive enamel coating provides long-term durability in aggressive water environments. The glass ceramic bearing material minimises wear and ensures smooth operation even at high speeds. The pump’s 2" threaded connection simplifies integration into existing pipe systems, reducing installation time and effort.

Technical parameters

Packaging dimensions (mm)	140/190/140
Power supply	220-230V / 50Hz
Bearing material	glass ceramic
Maximum flow rate based on speed (1/2/3)	22L/min / 38L/min / 55L/min
Maximum pressure in the pipeline	10 bar
Rated current	0.41 A
Mounting length	180 mm
Protection class	IP44
Connection thread	2"
Medium temperature	2-110 °C
Power based on speed (1/2/3)	46W / 63W / 93W
Discharge pressure	6 m
Weight	2.8 kg
Code	IBO OHI 32/60/180
Brand	AVANSA

The pump’s three-speed settings (46 W, 63 W, 93 W) allow for precise power and flow adjustments to suit different system requirements. The maximum flow rate of 55 L/min at third speed ensures adequate circulation for larger systems, while the 6 m head supports elevation and pipe friction losses. The 10 bar maximum pressure rating confirms its suitability for standard residential pressure levels. The 2-110°C temperature range makes it compatible with both cold water and heated circuits.

Installation and connection

To install the IBO OHI 32/60-180, ensure the system is depressurised and the pump is mounted in a location accessible for future maintenance. The 2" male thread connects directly to the pipe using a matching female fitting. A non-return valve should be fitted downstream to prevent backflow when the pump is off. The mounting bracket is fixed using the 180 mm distance between flange centres, allowing secure positioning on walls or platforms. Check that the electrical supply matches the 220-230 V / 50 Hz requirement and that the circuit is protected by a suitable fuse or circuit breaker. The pump must be earthed properly. Common installation errors include incorrect orientation (mounting the pump upside down), neglecting to align the flow direction with the arrow on the casing, and failing to bleed air from the system after installation. Always verify the pump’s operating speed matches the system load to avoid overworking the motor.

Compatibility and accessories

The IBO OHI 32/60-180 is compatible with standard central heating systems using cast iron or steel radiators, as well as underfloor heating circuits with manifold distribution. It can be used with condensing and conventional boilers, provided the temperature range remains within 2-110°C. Accessories such as a non-return valve, pressure gauge and expansion vessel should be included in the system design to ensure stable operation. For smaller systems or lower flow requirements, consider the IBO OHI 25/40-130 model, which offers a reduced flow capacity. Always check the system’s hydraulic balance and ensure the pump speed is selected to match the required flow and pressure. Additional components such as thermal insulation around the pump housing may be necessary in exposed or unheated areas to prevent condensation and freezing.

Technical background for designers

The pump operates via a centrifugal impeller driven by an AC motor with a three-speed mechanical switch. The switch alters the motor rotor’s position, changing the torque and rotational speed to adjust flow and pressure. This mechanical method avoids the need for external controllers, making it simple to operate and maintain. The cast iron housing provides structural rigidity and resistance to thermal expansion, while the anti-corrosive enamel prevents degradation in hard water conditions. The glass ceramic bearings reduce friction and noise during high-speed operation, contributing to the pump’s longevity. The pump is designed to integrate into systems with minimal pressure drop, ensuring consistent performance across varying loads. Key factors affecting service life include water pH, suspended solids and correct installation alignment. Regular inspection of the inlet and outlet for blockages helps maintain efficiency and prolongs the pump’s operational life.

Service and operation

Routine checks should include verifying the motor’s operating speed and confirming the flow rate matches the system’s demand. Listen for unusual vibrations or noise, which may indicate bearing wear or misalignment. The pump does not require scheduled lubrication due to the self-lubricating properties of the glass ceramic bearings. However, it is advisable to inspect the inlet filter periodically and clean it if necessary to prevent clogging. If the pump fails to operate, first check the electrical connections and fuse. If these are intact, disconnect the power and inspect the internal components for blockage or damage. The modular design allows for easy removal of the control unit for repair or replacement. Ensure the pump is reassembled correctly and all seals are intact before restarting the system. In cases of persistent issues, consult the manufacturer’s technical documentation for further guidance.

Frequently asked questions

Can the pump be used in an underfloor heating system?
Yes, the IBO OHI 32/60-180 is suitable for underfloor heating as long as the system’s flow and pressure requirements fall within the pump’s specifications.

Is it possible to operate the pump in reverse flow direction?
No, the pump must be installed according to the flow direction indicated on the casing. Reversal may cause mechanical stress and reduce efficiency.

Does the pump require regular lubrication?
No, the glass ceramic bearings are self-lubricating and do not require additional oil or grease during normal operation.

Can the pump be controlled remotely?
No, the IBO OHI 32/60-180 uses a mechanical three-speed switch and cannot be integrated with remote control systems or smart thermostats.