Nature's Comfort NCB-120 Installation and operation instructions manual - page 22
Page 22 of 25
To inspect and clean the rotor and canister, take the 4 Allen screws off to remove the motor from the volute.
***NOTE: The rotor shaft is ceramic. If it or the pump is dropped, hit, bounced or jarred it can fracture
and/or break. Use care when handling.*** Gently use a screwdriver to pop the lower SS plate (also serves as
the lower bearing) from the canister to pull the rotor out of the canister. Use a wire brush to clean off any scale
buildup from the rotor and canister. White vinegar or a calcium and lime cleaner can assist for stubborn buildup.
Do not allow any liquids to enter the motor.
Squealing: Comes from the bearings not having the air bled before running or not having enough clearance from
scale buildup around the bearings or around the rotor inside the canister causing oscillation (vibration). Scale
buildup happens if the water has too much hardness and is something that is greatly accelerated if the water does
not have the proper amount of treatment. Vibration can lead to fracturing and breaking of the shaft and is
not covered under warranty.
Scrubbing or ticking noise: Results from scale build up or the bearings and/or shaft wearing out allowing the
rotor to come in contact with one side of the canister. All eventually lead to “seizing” up. Not bleeding air from the
bearings, improperly treated water and/or high mineral content (hardness is the biggest problem) and TDS (total
dissolved solids) that are abrasive all result in premature wear of the bearings or scale buildup.
Water: Since water quality characteristics greatly vary across the USA, some customers get much longer life out
of a pump than others. Filling a boiler with softened water, adding and maintaining treatment so there’s 1,000-
1,500ppm of nitrites is the best thing you can do for pump and boiler life. While there is a one year warranty on
our pumps (from customer’s date of purchase), they must first be inspected and an attempt made to clean and put
back in service before a dealer determines one to be “failed”. Proper treatment and records must also be present
for the warranty to be honored. If a customer had a water test pass but adds water frequently due to boiling or
over-filling from improper operation this will bring down treatment levels quickly, possibly below the minimum level
of 500ppm and void a warranty.
E. End of Season
1. Power:
Turn off power supply at the appropriate circuit breaker
2. Chimney:
Inspect & Clean. Cap the chimney to keep rain water out. Re-seal caulk.
3. Firebox &
Remove ashes, soot, and hardened deposits from the fire chamber
Ash Tray:
by using a putty knife and/or wire brush. Coat the inside of firebox with a light coat of
motor oil or WD-40 to protect the steel during the off-season.
4. Doors:
Oil door hinges and latch.
5. Plumbing:
Ensure fittings on both ends of tubing are tight at all locations.
6. Water Treatment
Unless you are using anti-freeze or glycol, make sure your water is tested and has
enough Nature’s Comfort water treatment so there will be no rust or corrosion. Replace
water & treatment yearly. See warranty for further details.
Moisture from rain or condensation must not be allowed to accumulate in the firebox or ash pan during non-
use. Failure to perform preventive maintenance may result in severe corrosion and major damage to the
boiler. This is NOT covered under warranty.