Start-Up Procedures; Water Treatment And Freeze Protection; Filling Boiler With Water And Purging Air For Systems With Diaphragm Type Extension Tanks; Filling Boiler With Water And Purging Air With Conventional Closed Type Expansion Tanks - Bryant BW9 Installation, Start-Up, And Operating Instructions Manual

PROCEDURE 1—WATER TREATMENT AND FREEZE PROTECTION
1. When filling the boiler and heating system, water treatment is generally not required or desired. For localities where the water is unusually
hard (above 7 grains hardness) or for low pH water conditions (below 7.0), consult a local water treatment specialist.
a. This boiler is designed for use in a closed hydronic heating system ONLY!
b. Excessive feeding of fresh make-up water to the boiler may lead to premature failure of the boiler sections.
2. Use clean fresh tap water for initial fill and make-up of boiler.
a. A sand filter must be used if fill and make-up water from a well is to be used.
b. Consideration should be given to cleaning the heating system, particularly in retrofit situations, where a new boiler is being installed in
an older piping system.
c. In older systems, obviously discolored, murky, or dirty water, or a pH reading below 7, are indications that the system should be cleaned.
d. A pH reading between 7 and 8 is preferred.
3. Antifreeze if needed, must be of a type specifically designed for use in closed hydronic heating systems and with aluminum.
a. Choice and use of antifreeze must be in accordance with local plumbing codes.
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b. Only INTERCOOL NFP-50 is approved for use. INTERCOOL NFP-50 is available from Interstate Chemical Company.
(1.) Use of any antifreeze other than INTERCOOL NFP-50 will void warranty.
(2.) Antifreeze must be maintained per manufacturer's specifications. Failure to do so will result in the warranty being voided.
c. Do not use automotive antifreeze as the type of corrosion inhibitors used will coat the boiler's heat transfer surfaces and greatly reduce
capacity and efficiency.
d. Consult antifreeze manufacturer's literature for compatibility of antifreeze with aluminum boiler. Some brands have corrosion inhibitors
that break down more rapidly or become ineffective at higher operating temperatures when used with aluminum. Follow the antifreeze
manufacturers instructions on determining the proper ratio of antifreeze to water for the expected low temperature conditions, and for
maintaining the quality of the antifreeze solution from year to year.
e. Use of antifreeze in any boiler will reduce capacity by as much as 10 to 20 percent, due to differing heat transfer and pumping
characteristics. This must be taken into consideration when sizing the heating system, pump(s), and expansion tank. Consult antifreeze
manufacturer's literature for specific information on reduced capacity.
f. Water content of the boiler is 2.6 gallons. (10 liters)
PROCEDURE 2—FILLING BOILER WITH WATER AND PURGING AIR FOR SYSTEMS WITH DIAPHRAGM TYPE EXTENSION
TANKS
Refer to appropriate "Near Boiling Piping" diagrams.
1. Close all zone service valves on the supply and return piping. Open the feed valve and fill boiler with water. Make sure air vent is open.
Hold relief valve open until water runs air free for 5 sec to rapidly bleed air from boiler, then let the relief valve snap shut.
2. Open the zone service valve on the supply pipe for the first zone. Open the purge valve on the first zone. Feed water will fill the zone,
pushing air out the purge valve. Close the purge valve when the water runs air free. Close the zone service valve.
3. Repeat step 2 for all remaining zones.
4. Open all service valves. Any air remaining trapped in the return lines between the service valves and the boiler will be pushed towards the
air vent when the boiler is placed in operation.
5. Inspect piping system. Repair any leaks immediately.
PROCEDURE 3—FILLING BOILER WITH WATER AND PURGING AIR WITH CONVENTIONAL CLOSED TYPE EXPANSION
TANKS
Refer to appropriate "Near Boiling Piping" diagrams.
1. Close all zone service valves on the supply and return piping and close the expansion tank service valve. Drain expansion tank. Open the
feed valve and fill boiler with water. Hold relief valve open until water runs air free for five sec to rapidly bleed air from boiler, then let
the relief valve snap shut.
2. Open the zone service valve on the supply pipe for the first zone. Open the purge valve on the first zone. Feed water will fill the zone,
pushing air out the purge valve. Close the purge valve when the water runs air free. Close the zone service valve.
3. Repeat step 2 for all remaining zones.
4. Open the expansion tank service valve and the tank vent. Fill the tank to the proper level and close the tank vent. Remove the handle from
the expansion tank service valve so the homeowner doesn't accidentally close it.
5. Open all service valves. Any air remaining trapped in the return lines between the service valves and the boiler will be pushed towards the
expansion tank when the boiler is placed in operation.
6. Inspect piping system. Repair any leaks immediately.
NOTE: DO NOT use stop leak compounds. Leaks in threaded connections in the aluminum boiler sections must be repaired immediately.
Aluminum threads will not seal themselves.
PROCEDURE 4—PLACING BOILER IN OPERATION
Safe lighting and other performance criteria are met with the gas manifold and control assembly provided on the boiler per tests specified in ANSI
Z21.13-latest revision. Refer to the Operating Label on the equipment. (See Fig. 20.)

START-UP PROCEDURES

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