Rothenberger ROSLIM Super Silent Mini AC Condensate Pump – 22 L/h, 20 m Head, With Reservoir (1099905)

Rothenberger ROSLIM 22L/20m Super Silent (product code 1099905), for draining condensate collected in split AC indoor units, is a mini AC condensate pump with reservoir. With its slim pump body and separate reservoir unit, it can be concealed inside the AC trunking or behind the indoor unit; with a 22 L/h flow rate, 20 meter discharge head and below-19 dB(A) noise level, it is designed for installations where condensate cannot drain by gravity.

Quiet Mini Condensate Pump Concealed in the Trunking

ROSLIM handles the condensate of indoor units with a cooling capacity of up to 28 kW (95,550 BTU/h). It withstands water temperatures up to 70 °C, and thanks to its 3 A normally closed safety switch, it can be wired to stop the AC compressor when the reservoir reaches overflow level. With a wide 100–240 V supply range and power consumption below 4 W, it provides quiet, uninterrupted drainage in residential and office wall-mounted air conditioners. For those who want digital flow modes, the same family offers the ROSLIM DIGITAL 18L (1099906) and 40L (1099907) models.

Technical Specifications (ROTHENBERGER Data)

• Brand / Model: ROTHENBERGER ROSLIM 22L/20m Super Silent · product code 1099905
• Product Type: mini (slim) AC condensate pump with reservoir
• Power Supply: 100–240 V AC, 50/60 Hz · power consumption below 4 W
• Maximum Flow Rate: 22 L/h (at 0 m head)
• Noise Level (1 m): below 19 dB(A)
• Maximum Recommended Discharge Head: 20 m
• Maximum Suction Height: 2 m
• Suitable Unit Capacity: up to 28 kW (95,550 BTU/h)
• Maximum Water Temperature: 70 °C
• Safety (Overflow) Switch: 3 A, normally closed
• Drain Tube: 6 mm inner diameter
• Electrical Class / Protection: Class II appliance · fully potted body, IP45
• Pump Body Dimensions (L × W × H): 185 × 36 × 34 mm

Technician Tips

• Always connect the overflow switch: wire the safety switch in series with the AC compressor or thermostat circuit; if the pump fails, the unit stops and the ceiling and walls are not flooded.
• Mount the reservoir level: fix the reservoir unit horizontally below the drain outlet of the indoor unit; a tilted reservoir causes the pump to start late or run dry.
• Conceal the body in the trunking: the slim pump body fits inside the AC trunking; fix it so that it does not vibrate.
• Avoid dips in the discharge line: first route the drain hose upward and then let it run with a continuous fall; water collecting in the line strains the pump unnecessarily.
• Periodic cleaning: clean the filter in the reservoir and the drain pan during maintenance; a clogged filter is the most common cause of noise and loss of flow.