Service instructions, Typical hydronic heating/cooling applications, Xylem inc – Bell & Gossett A85524C Rolairtrol Air Separator User Manual

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SERVICE INSTRUCTIONS

The strainer in the R series Rolairtrol may need to be cleaned periodically. This is

particularly true during the initial start-up period. The need to clean the strainer

will be evidenced by a high pressure drop across the Rolairtrol or by pump cavi-

tation problems. To clean the strainer:

a) Allow the system water temperature to cool below 100°F.

b) Open the blowdown drain valve for a few seconds. This should dislodge

accumulated dirt from the strainer. If it does not then the strainer must be

removed from the Rolairtrol for cleaning. This can be accomplished by clos-

ing the isolation valves to isolate the Rolairtrol from the system. Make sure

the water temperature in the Rolairtrol is below 100°F. Open the blowdown

valve on the bottom of the Rolairtrol to drain the unit. Make sure that all flow

from the blowdown valve has stopped. If water continues to flow, the isola-

tion valves must be repaired or replaced before proceeding.

c) For 2", 2

" and 14" through 24" models, remove the flange bolts that hold

the strainer housing cover in place on the bottom of the Rolairtrol. Remove the

cover and strainer. Clean the strainer and reinstall in the Rolairtrol. Replace

the cover gasket with a new one and reinstall the cover making sure that the

flange bolts are tightened in a criss-cross pattern to the proper torque. Close

the blowdown valve and open the isolation valves to return the Rolairtrol to

normal operation. Check the gasket for signs of leakage. If found, additional

slight tightening of bolts may be required.

d) For 3" through 12" of the R models, remove the 3" pipe plug that holds the

strainer in place on the bottom of the Rolairtrol. Remove and clean the strainer,

reinstall them making sure that the strainer goes through the strainer guide

and the pipe plug is tightened. Close the blowdown valve and open the isola-

tions to return the Rolairtrol to normal operation. Check the pipe plug for

signs of leakage. If found, additional slight tightening of pipe plug may be

required.

e) Do not use any open flame devices (torches, solder guns, etc.) which may

thermally degrade the painted or galvanized surfaces and cause the release

of harmful decomposition products, which may be harmful if breathed.

WARNING: Leakage, corrosion or indications of damage are signs of

an impending serious failure of the Rolairtrol. Periodically inspect for

damage and if noted the Rolairtrol must be serviced or replaced. Failure to

follow these instructions could result in serious personal injury or death

and property damage.

WARNING: System fluid under pressure and/or high temperature

can be very hazardous. Before proceeding to service strainer, reduce

system pressure to zero or isolate the Rolairtrol from the system. Allow the

system to cool below 100°F. Failure to follow these instructions could

result in serious personal injury or death and property damage.

CAUTION: The use of Teflon

* impregnated pipe compound and

Teflon

tape on pipe threads provides lubricity which can lead to

overtightening and breakage. Do not overtighten. Failure to follow this

instruction can result in moderate personal injury from hot water and/or

property damage.

WARNING: Water at temperatures above 100°F can be very

hazardous. Allow system water temperature to cool down below

100°F before blowing down Rolairtrol. Failure to follow these instructions

could result in serious personal injury or death and property damage.

WARNING: Failure to follow these instructions could result in serious

personal injury or death.

TYPICAL HYDRONIC HEATING/COOLING APPLICATIONS

Fig. 1 Air Control

Fig. 2 Air Elimination

WARNING: The use of improper mating flanges, connectors, gaskets

or bolting can cause flange or connector failure resulting in the loss

of hot or cold system fluid. Use only companion cast iron ANSI flanges or

connectors with appropriate gaskets and properly tightened bolts. Failure

to follow this instruction can result in serious personal injury and/or prop-

erty damage.

*Teflon is a registered trademark of E.I. DuPont de Nemours and Company.

Xylem Inc.

8200 N. Austin Avenue

Morton Grove, Illinois 60053

Phone: (847) 966-3700

Fax: (847) 965-8379

www.xyleminc.com/brands/bellgossett