Nature's Comfort NCB-80 Installation And Operating Manual - page 25
Page 25 of 34
D. Rope Seals
Caution! For inspection and adjustment, make sure to follow the same procedures for
opening doors and covers as outlined for loading and cleaning.
Inspection
Check the rope seals on all doors and covers periodically during the heating season or when
cleaning ash from the boiler as they will compress. If any amount of smoke is seeping out,
damage to the door will occur if adjustment is not made immediately to tighten the rope seal.
This is not covered under warranty. Tighten/adjust whenever smoke is noticed seeping out or as
needed using the procedures below. If there is no more adjustment available and smoke is seeping
through, the rope seal must be removed, cleaned & loosened up, reversed and re-installed or
replaced with new rope. Contact Nature’s Comfort for new rope or caulk if needed. This is a normal
maintenance item and not a warranty issue.
Adjusting Fuel Door
Slightly loosen one bolt on the hinge or latch (depending on where adjustment is needed) and tap
with a wood block to re-position and then tighten. Continue with other bolts one at a time as
needed.
If the latch has no remaining adjustment, add washers behind the door handle to further tighten the
latch side.
Installing Rope On Hinged Doors (1” round rope)
Re-position the door hinge and latch as far out as possible and install 1” round rope seal with a ½”
bead of high temperature caulk behind it to glue the rope in place. Use a thicker layer of caulk
where needed to push rope out for maximum adjustment. This method can accommodate up to a
½” of misalignment.
Make sure to push the rope to the outside of the corners to mate properly with the jamb (do not
stretch the rope). Put some caulk on the joint ends after cutting the rope and make sure the ends
are compressed or smoke will seep through. Over-extend the door latch open and bounce the door
closed twice to custom fit the seal to the jamb. If there are thick spots of caulk keeping the rope
pushed out, leave door open 24 hours until caulk behind rope is fully cured. Re-adjust door to
properly seal.
Pre-condition rope as explained in the “Installation” section. Start the boiler and tighten further if
needed.
E. Pump
It is highly recommended that an additional pump or replacement cartridge be purchased from
Nature’s Comfort to have as a spare.
Inspection: Before installing, inspect the pump shaft by removing the large silver screw to expose
the top of the shaft and turn back and forth with a screw driver to make sure the shaft was not
broken during shipping. Broken shafts are not covered under warranty unless found and noted
before installation and startup.
Startup: Make sure the lines are filled and prime the pump by cracking the upper pump flange to
bleed the air out of the impeller and volute.
IMPORTANT: If applicable, the large silver bleeder
screw must also be removed from the pump before running for the first time to bleed all air
from the bearings or the pump warranty will be void.
After priming the pump, remove and leave
the bleeder screw out, start the pump to finish bleeding all air out of the bearings, shut off the pump
and re-install bleeder screw. The pump may now run. Always run at high speed for the best
efficiency of the boiler and heat exchangers in the home.