Operating instructions
17
14. Fill the boiler to its normal waterline.
15. Add boiler water treatment compound as needed
(see Section III Item 8).
16. Restore electric service to boiler.
17. Fire burner to raise water temperature to above
180°F to drive off free oxygen.
BEFORE RETURNING BOILER TO SERVICE:
Follow the low water cutoff check out procedure in
Section II Item 4 Part C.
B. Float Type Low Water Cut-Off During the
heating season, if external low water cutoff is on
the boiler, the blow off valve should be opened
once a month (use greater frequency where
conditions warrant), to ush out the sediment
chamber so the device will be free to function
properly.
Low water cutoffs and water feeders should be
dismantled annually by qualied personnel, to the
extent necessary to insure freedom from obstructions
and proper functioning of the working parts. Inspect
connecting lines to boiler for accumulation of mud, scale,
etc., and clean as required. Examine all visible wiring
for brittle or worn insulation and make sure electrical
contacts are clean and that they function properly. Give
special attention to solder joints on bellows and oat
when this type of control is used. Check the oat for
evidence of collapse and check mercury bulb (where
applicable) for mercury separation or discoloration.
DO NOT ATTEMPT TO REPAIR MECHANISM IN THE
FIELD. Complete replacement mechanisms, including
necessary gaskets and installation instructions, are
available from the manufacturer.
6. CHECK BURNER AND CONTROLS at least once
a year. See Item 4 under Operating Instructions for
control checks. See Burner Manual for burner tests and
adjustments.
7. LUBRICATE BOILER COMPONENTS according
to manufacturer’s instructions. Generally, this involves
burner and circulator.
8. CHECK SAFETY VALVE at the start of each heating
season and once or twice during the season to be sure it
is in working condition. To do this, fasten wire or cord to
the lever of the valve and pull the lever standing a safe
distance away from the valve.
9. ATTENTION TO THE BOILER WHILE NOT IN
OPERATION.
A. If a boiler is not used during the winter months,
and it is in a place subject to freezing, it must be
fully drained to prevent freeze damage.
Clean retubes with ue brush and reinstall
turbulators. If turbulators are corroded or
deteriorated, replacing them will ensure a high
level of boiler efciency. Remove soot and rust and
reseal the boiler.
5. MAINTENANCE OF LOW WATER CUTOFF
DEVICES
PROBE AND FLOAT TYPE LOW WATER CUTOFF
DEVICES REQUIRE ANNUAL INSPECTION AND
MAINTENANCE.
A. Probe Type Low Water Cut Off Although these
devices are solid state in design, the probe is
exposed to possible contamination in the boiler
water.
It is important to physically remove the probe from the
boiler tapping annually and inspect it for accumulation of
scale or sediment.
Following these steps inspect, clean and/or
replace the probe:
1. Turn off electric service to the boiler.
2. Drain boiler water to a level below the tapping for
the probe.
3. Disconnect the wiring connections between the
low water cutoff and the probe.
4. Dismount the low water cutoff control from the
probe.
5. Unscrew the probe from the boiler tapping.
6. Inspect that portion of the probe that is exposed to
the boiler water for scale or sediment buildup.
7. Light deposits may be removed by wiping the
probe with a damp cloth. Wiping the probe with
a cloth soaked in vinegar will remove more
tenacious lime deposits. The most stubborn
deposits may be removed from the probe by using
a diluted amount (3 part of water to 1 part) of
phosphoric acid (H2PO4).
Exercise caution when handling phosphoric acid and
follow the instruction label on its container.
8. Wire brushing of the probe is not recommended.
9. Clean the pipe threads of the probe to remove old,
hardened pipe dope and other foreign matter.
10. Apply a moderate amount of good quality pipe
dope to the pipe threads on the probe, leaving the
rst two threads bare. Do not use PTFE (Teon)
tape.
11. Screw the probe into the boiler tapping.
12. Mount the low water cutoff control on the probe.
13. Reconnect the control to probe wiring.
IMPORTANT
CAUTION
IMPORTANT
WARNING