Slant/Fin S-150, SX-210 Water Level Check During Heating Season, Annual Inspection and Cleaning

12 Sentry

3.Water lines: slightest leaks should be corrected.

4.Low water cutoff, for operation (see instructions fur- nished with unit).

2.WATER LEVEL CHECK DURING HEATING SEASON

A.Check water pressure regularly and add water slowly to system when needed. If much water is added, venting may be necessary.

B.Regular loss of water from water boiler system may indi- cate either a system leak, or a faulty air control system, or a faulty automatic fill valve.

3.ANNUAL INSPECTION AND CLEANING

A.It is important that this boiler be inspected by a compe- tent serviceperson to help insure safe and reliable oper- ation.

B.Check for gas leaks from valve and gas piping to burners and pilot. If leaks are found, repair or replace as required.

C.This inspection should include:

1.Controls check. See “Safety Check for Control System” (No. 4) below.

2.Recheck of input gas rate to burners. See "Initial Start" paragraph in "Operating instructions" section.

3.Re-adjusting for best flame characteristics of main flame and pilot(s).

See "Initial Start" paragraph in "Operating Instructions" section and see "Burner Adjustment" section.

4.Burner and boiler flue passage cleanliness: BURNER AND FLUE CLEANING (see figure 17). It is suggested that paper be placed on burners to collect any foreign material when cleaning flues.

5.Remove jacket top and flue cover.

6.Use wire brush to clean flueways.

7.Replace flue cover and re-seal with furnace cement. Replace jacket top. Remove and dispose of paper and accumulated material.

8.If burner surfaces are not clean, or if uneven flame indicates plugged burner ports, remove and clean burners.

WARNING:

The ceramic combustion chamber in the burner box contains crystalline silica.

Wear proper dust mask and gloves when servicing combustion chamber or burners.

Crystalline Silica has been identified as a carcinogen or possibly carcinogenic to humans.

NOTE-TO REMOVE BURNERS:

1.Disconnect pilot at pilot mount, or disconnect pilot gas line at gas valve, before removing burners next to pilot.

2.Lift burner and remove burner from orifice.

3.Clean and replace burners* and pilot. Adjust burners as described on page 10.

*To clean burners run a clean flue brush up the tube until all foreign matter is removed.

4.SAFETY CHECK FOR CONTROL SYSTEM

A. High limit control test: Set thermostat high enough for boiler water temperature to reach high limit control set- ting. When this temperature is reached, the high limit switch should open, and the main gas valve should close

Figure 17.

automatically. If the high limit does not operate to close the main gas valve, the valve, the high limit or the wiring is faulty. Repair or replace immediately.

B.Gas valve safety shutdown test:

1.For boiler equipped with continuous burning pilot, with main burners firing, disconnect the thermocouple from the gas valve. The gas valve should immediate- ly shut off the main burners and the pilot.

2.For boilers equipped with Honeywell S8600 intermit- tent pilot system, with main burners firing, disconnect the ignition cable from the S8600 IGNITOR BOX. The gas valve should shut off the main burners.

If the gas valve fails to shut down main burners when the test in 1 or 2 is performed, replace the gas valve.

C.Check for gas leaks from valve and gas piping to burners and pilot. If leaks are found, repair or replace as required.

5.PROVIDING PROTECTION FROM FREEZING

A.Anti-freeze is sometimes used in hydronic heating sys- tems to protect against freeze-up in the event of power failure or control shutdown when the building is unoccu- pied. It should be recognized that unless the building is kept above freezing temperature by some means, the plumbing system is not protected.

PROPYLENE GLYCOL is used in the quick-freeze food industry; it is practically non-toxic. Its use may be permit- ted when tankless heaters are used. When anti-freeze must be used, inhibited propylene glycol is recommend- ed. Useful information on the characteristics, mixing proportions, etc. of glycol in heating systems is given in Technical Topics No. 2A, available from the Hydronics Institute 34 Russo Place, Berkeley Heights, NJ 07922. Consult glycol manufacturers for sources of propylene glycol. DO NOT use ethylene glycol because it is toxic.

B.Water Treatment:

A good water treatment program will not only extend the useful life of this boiler but it will also save much of the time and expense of repairs made necessary by pre- ventable occurrences.

A reputable water treatment company should be consult- ed to evaluate and determine the best overall treatment program for your boiler equipment.

6.KEEP THE BOILER AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE, AND OTHER FLAMMABLE VAPORS AND LIQUIDS.