Xylem MM 235E Replacement Snap Switch Assembly SWA 150S Manual do Utilizador descarregar pdf

INSTRUCTION MANUAL

MM-235E

For Series 150S and 157S Low

Water Cut-Off/Pump Controllers

(All Models)

Replacement Snap Switch Assembly

SWA-150S SWA-158S

SWA-150S-MD SWA-159S

• 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 all sources of electrical power before servicing unit.

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

installed on the boiler. After servicing unit, 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 a fire, do not use this low water cut-off to switch currents over 7.4A, 1/3 Hp at

120 VAC or 3.7A, 1/3 Hp at 240 VAC, unless a starter or relay is used in conjunction with it.

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

WARNING

CAUTION

WARNING

Replacement Switch Assembly

1 2 3 4 5 6 ... 11 12

Resumo do Conteúdo

Página 1 - INSTRUCTION MANUAL

INSTRUCTION MANUAL MM-235EFor Series 150S and 157S LowWater Cut-Off/Pump Controllers(All Models)Replacement Snap Switch AssemblySWA-150S SWA-158SSWA-1

Página 2 - Manual Reset Models

PUMPSWITCHPUMPSET SCREWNPUMP OFFPUMP ONBURNER“CUT-OFF LEVEL” AT CAST LINE10ADD ADHESIVE HEREO5b. If the Pump Off point does not match the one shown in

Página 3 - OPERATION

11RULERCASTLINELEVEL2. Hold the ruler against the side of the gauge glass in a position sothe Cast Line mark is on the same level as the cast line on

Página 4 - Operation

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

Página 5 - Switch Level Ruler

For ModelRepl. SwitchModel & Part No.150S150S-B150S-M*150S-B-M*150S-M-MD*150S-B-M-MD*157S157S-A157S-P157S-R157S-RL157S-M*157S-A-M*157S-R-M*157S-RB

Página 6

Pump Circuit Rating (Amperes)Voltage Full Load Locked Rotor Pilot Duty120 VAC 7.4 44.4345 VA at240 VAC 3.7 22.2120 or 240 VACApproximateDistance Above

Página 7

4ApproximateDistance AboveCast Line DifferentialSetting In. (mm) In. (mm)Motorized15/16 (24)Valve Closed5/16 (8)Motorized5/8 (16)Valve OpenBurner

Página 8

5PUMP #1OFFPUMP #1ON3/4"DIFFERENTIAL(19mm)PUMP #2 ONAT CAST LINEPUMP #2ONPUMP #2OFF7/8"DIFFERENTIAL(22mm)PUMP #1OFFPUMP #2ONPUMP #2 ONAT CAS

Página 9

PUMPSWITCHPUMPCIRCUITTERMINALSLOW WATERCUT-OFF ANDALARM SWITCHALARMCIRCUITTERMINALSLOW WATERCUT-OFFTERMINALS63. Remove the cover (B).4. Mark and remov

Página 10 - ADD ADHESIVE HERE

7CD5a. Locate the actuator assembly (C) and the two fillister headscrews (D) which secure it to the bearing of the control.b. Clean the inspection lac

Página 11 - INSTALLATION

8INSTALLATION SECTION 2 - Checking Switch Settings and Adjusting Switch Setpoints at Operating PressureIMPORTANT: All switches have fixed differential

Página 12 - MAINTENANCE

BURNERSWITCHBURNERSET SCREWK4b. If the cut-off point does not match the oneas shown in chart for the control (pages 3,4, or 5) as measured on the &quo

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Xylem MM 235E Replacement Snap Switch Assembly SWA 150S Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Bombas Xylem MM 235E Replacement Snap Switch Assembly SWA 150S . Xylem MM 235E Replacement Snap Switch Assembly SWA 150S 150S MD 158S 159S User Manual Manual do Utilizador

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