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• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices

NOTICE:

Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.

Electrical connections

Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about
requirements, see sections dealing specifically with electrical connections.

Product warranty

Coverage

Xylem undertakes to remedy defects in products from Xylem under these conditions:

• The faults are due to defects in design, materials, or workmanship.
• The faults are reported to an local sales and service representative within the warranty

period.

• The product is used only under the conditions described in this manual.
• The monitoring equipment incorporated in the product is correctly connected and in

use.

• All service and repair work is done by Xylem authorized personnel.
• Genuine Xylem parts are used.
• Only Ex-approved spare parts and accessories authorized by an EX-approved Xylem

representative are used in Ex-approved products.

Limitations

The warranty does not cover defects caused by these situations:

• Deficient maintenance
• Improper installation
• Modifications or changes to the product and installation made without consulting an

Xylem authorized representative

• Incorrectly executed repair work
• Normal wear and tear

Xylem assumes no liability for these situations:

• Bodily injuries
• Material damages
• Economic losses

Warranty claim

Xylem products are high-quality products with expected reliable operation and long life.
However, should the need arise for a warranty claim, then contact your local sales and
service representative.

Introduction and Safety

4

PSE-800-M Low Water Cut-off Installation, Operation, and Maintenance Manual

Summary of Contents for McDonnell & Miller PSE-800-M

Page 1: ...PSE 800 M Low Water Cut off Installation Operation and Maintenance Manual...

Page 2: ......

Page 3: ...all the control housing 8 Wire the probe to the control housing 8 Control to boiler wiring 9 Electrical conduit connections 9 Wire connections to the terminal block 9 Option A wiring 10 Option B wirin...

Page 4: ...uipment or use of parts not provided by Xylem If there is a question regarding the intended use of the equipment please contact a Xylem representative before proceeding This manual clearly identifies...

Page 5: ...ing specific symbol Electrical Hazard These are examples of other categories that can occur They fall under the ordinary hazard levels and may use complementing symbols Crush hazard Cutting hazard Arc...

Page 6: ...d in this manual The monitoring equipment incorporated in the product is correctly connected and in use All service and repair work is done by Xylem authorized personnel Genuine Xylem parts are used O...

Page 7: ...loss of power as long as there is water on the probe before and after the power loss occurred CSD 1 code compliance For manual reset units when the control is in a low water condition and there is an...

Page 8: ...specifications Ratings Model Control Voltage Motor Switch rating Pilot rating PSE 802 M 24 24 VAC N A 50 VA PSE 802 M U 24 PSE 801 M 120 120 VAC 7 5 FLA 43 2 LRA 125 VA PSE 801 M U 120 Hertz 50 60 Con...

Page 9: ...et low water cut off LWCO Installing the probe above this location could result in nuisance shutdowns or lockouts Install probe in a location above the minimum safe water level as designated by the bo...

Page 10: ...ads 5 Tighten the mounting screws to approximately 2 ft lbs 2 6 N M Steps 2 and 3 Steps 4 and 5 4 6 4 6 Wire the probe to the control housing 1 Slip the ring terminal 7 followed by the lock washer 8 o...

Page 11: ...the new manual reset LWCO turns off when the existing auto reset LWCO detects a low water condition reducing the chance of nuisance lockouts The water feeder continues to operate because there is stil...

Page 12: ...lines indicate new wires Water feeder should be wired to existing Auto Reset LWCO Wiring diagrams for the water feeder can be found in the water feeder installation instruction manual Option B wiring...

Page 13: ...a Model 67 LWCO Voltage of the new manual reset LWCO must be the same voltage as the burner circuit 1 Remove existing wire from terminal 1 of the Model 67 LWCO and connect it to Terminal B of the new...

Page 14: ...2 3 4 N H C W B 1 1 2 3 4 TOP 2 3 4 1 Factory jumper bar 2 To burner 3 Neutral 4 Hot _ _ _ _ Dashed lines indicate existing wires _____ Solid lines indicate new wires Installation 12 PSE 800 M Low Wa...

Page 15: ...he boiler a The burner turns off and the Red light begins to flash when there is no water on the probe b After 60 seconds the red light will stop flashing and will remain on IMPORTANT If water returns...

Page 16: ...r cut off annually Remove and inspect the self cleaning probe every five years Use a non abrasive cloth and rinse with clean water when the probe requires cleaning Do not use sharp instruments to remo...

Page 17: ...specified in the wiring diagrams of the boiler manufacturer or in this instruction manual 3 Check to ensure that PTFE tape has not been used on the threaded connection of the electrode to the boiler 4...

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Page 20: ...150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brands and applications expertise backed by a legacy of innovation F...

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