Xylem MM 226C Series 69 Low Water Cut-Offs For Steam Boi Manuel d'utilisateur télécharger pdf

INSTRUCTION MANUAL

Series 69

Low Water Cut-Offs

For Steam Boilers

• Before using this product read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application, instal-

lation, and maintenance of plumbing, steam, and electrical equipment and/or systems in

accordance with all applicable codes and ordinances.

• To prevent serious burns, the boiler must be cooled to 80˚F (27˚C) and the pressure must be

0 psi (0 bar) before servicing.

• To prevent electrical shock, turn off the electrical power before making electrical connections.

• This low water cut-off must be installed in series with all other limit and operating controls

installed on the boiler. After installation, check for proper operation of all of the limit and

operating controls, before leaving the site.

• We recommend that secondary (redundant) Low Water Cut-Off controls be installed on all

steam boilers with heat input greater than 400,000 BTU/hour or operating above 15 psi of

steam pressure. At least two controls should be connected in series with the burner

control circuit to provide safety redundancy protection should the boiler experience a

low-water condition. Moreover, at each annual outage, the low water cutoffs should be

dismantled, inspected, cleaned, and checked for proper calibration and performance.

• To prevent serious personal injury from steam blow down, connect a drain pipe to the control

opening to avoid exposure to steam discharge.

• To prevent a fire, do not use this low water cut-off to switch currents over 7.2A, 1/3 Hp at

120 VAC or 3.6A, 1/3 Hp at 240 VAC, unless a starter or relay is used in conjunction with it.

WARNING

CAUTION

WARNING

Series 69

Applications:

For residential and commercial boilers of any

steaming capacity.

MM-226C

California Proposition 65 warning! This product contains chemicals known to the

•

state of California to cause cancer and birth defects or other reproductive harm.

Previous controls should never be installed on a new system. Always install new

•

controls on a new boiler or system.

CAUTION:

A more frequent replacement interval may be necessary based on the condition of

the unit at time of inspection. McDonnell Miller s warranty is one (1) year from date

of installation or two (2) years from the date of manufacture.



Failure to follow this warning could cause property damage, personal inj ury or death.

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Résumé du contenu

Page 1 - For Steam Boilers

INSTRUCTION MANUAL Series 69Low Water Cut-OffsFor Steam Boilers• Before using this product read and understand instructions.• Save these instructions

Page 2 - OPERATION

2The 69 Series Built-in Low Water Cut-Off is furnishedwith a threaded barrel casting which fits right into a2 1/2" tapping provided by some boile

Page 3 - INSTALLATION –

OFFON• Turn the boiler off.• Drain the water in the boiler to a level which is below the tapping on the boiler. Allow the boiler to cool to 80˚F (27˚C

Page 4 - IMPORTANT

Wiring Instructions• To prevent electrical shock, turn off the electrical power before making electrical connections.• This low water cut-off must be

Page 5

BURNER101A120 VACSUPPLYNH24V123469Wiring Alternatives - Controls of Different VoltagesFor 120V Burner/24V Feeder setups For 24V Burner/120V Feeder set

Page 6 - Wiring Diagrams (continued):

24V Burner/120V Feeder120V Burner/120V Feeder or24V Burner/24V FeederConnect a wire from the "Hot" side of the power supply to thewater feed

Page 7 - INSTALLATION COMPLETE

TESTING• Manually fill boiler until water level in the sight glass is above the control.• Turn on the power to the boiler and water feeder.Activate th

Page 8 - MAINTENANCE

Xylem Inc. 8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379www.xyleminc.com/brands/mcdonnellmillerMcDonnel