S1156 PC - Water pump Nibe - Free user manual and instructions
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| Product Type | Water Circulation Pump |
| Brand | Nibe |
| Model | S1156 PC |
| Application | Heating systems, hot water circulation |
| Dimensions (H x W x D) | 200 x 150 x 150 mm |
| Weight | 5 kg |
| Power Supply | 230 V ~ 50 Hz |
| Power Consumption | 100 W |
| Maximum Flow Rate | 25 L/min |
| Maximum Head | 8 m |
| Connection Size | 1" BSP |
| Material | Cast iron housing, stainless steel shaft |
| Protection Rating | IP44 |
| Insulation Class | F |
| Noise Level | < 55 dB(A) |
| Fluid Temperature Range | -10 °C to 110 °C |
| Ambient Temperature | 0 °C to 40 °C |
| Main Functions | Variable speed control, dry-running protection, anti-blockage |
| Maintenance | Periodic cleaning of filter; check seals and connections |
| Safety Features | Thermal overload protection, IP44 enclosure |
Frequently Asked Questions - S1156 PC Nibe
What type of fluid can the Nibe S1156 PC pump handle?
The pump is designed for clean water and water-glycol mixtures up to 50% glycol, typically used in heating systems.
How do I install the Nibe S1156 PC pump?
Install the pump in a horizontal or vertical position with the shaft horizontal. Use flexible connections to avoid stress. Ensure the flow direction matches the arrow on the housing.
Do I need to prime the pump before starting?
The Nibe S1156 PC is a self-priming pump for most installations. However, ensure the pump is filled with fluid before initial startup to avoid dry running.
How do I adjust the speed of the pump?
The pump features variable speed control via a small dial on the terminal box. Turn it to select one of three preset speeds (I, II, III) for different flow requirements.
Why is my pump making noise?
Noise can be due to air in the system, cavitation, or loose mounting. Bleed air from the pump by opening the vent screw. Check for adequate inlet pressure and tighten mounting bolts.
What maintenance does the pump require?
Periodically check the strainer/filter for debris. Lubrication is not required as bearings are sealed. Inspect seals and connections for leaks annually.
Can I replace parts of the pump myself?
Common replaceable parts include the capacitor and mechanical seal. For major repairs, contact a qualified technician. Always disconnect power before servicing.
What is the warranty period for the Nibe S1156 PC?
Nibe offers a 2-year warranty from the date of purchase covering manufacturing defects. Proof of purchase is required.
How do I bleed air from the pump?
Locate the vent screw on the pump housing. With the pump running, slightly loosen the screw until water emerges, then retighten. Use a cloth to catch drips.
What does the red indicator light mean?
A solid red light indicates normal operation. Flashing red signals a fault, such as dry run or overheating. Refer to the manual for specific fault codes.
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USER MANUAL S1156 PC Nibe
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Product information
Brand : Nibe
Model : S1156 PC
Category : Water pump