Specifications

ManualsBrandsMiller Electric ManualsWelding System152

Series 101-A

Electric Water Feeder

Applications:

For use on low pressure boilers with cold water feed.

The Series 101-A can be used with mechanical or

electronic low water cut-off controls.

• 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.

• Boiler manufacturer schematics should always be followed. In the event that the boiler

manufacturer’s schematic does not exist, or is not available from the boiler manufacturer,

refer to the schematics provided in this document.

• To prevent water damage check to make sure there is adequate floor drainage capacity.

Check all components in the system to insure that they will not leak in the event of an

overfeed condition.

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

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

NING

TION

WARNING

Do not use automatic water feeders with manual reset LWCO’s.

Failure to follow this warning could cause flooding, property damage,

personal injury or death.

WARNING

SPECIFICATIONS

Maximum Water Pressure: 150 psi (10.5 kg/cm

)

Maximum Boiler Pressure: 25 psi (1.76 kg/cm

)

Maximum Boiler Size: 5000 sq. ft. EDR

2,350,000 BTU/HR

Output Capacity

Maximum Water Temperature: 120˚F (49˚C)

Flow Data

Pressure Differential Flow Rate

psi (kg/cm

) gpm (lpm)

5(.4) 1.4 (5.3)

10 (.7) 1.7 (6.4)

20 (1.4) 2.1 (7.9)

40 (2.8) 2.9 (11.0)

60 (4.2) 3.4 (12.9)

80 (5.6) 4.0 (15.1)

Electrical Ratings

Model Voltage Full Load

101A-120 120V 40 VA

101A-24 24V 40 VA

NOTE: 101A-24 includes a transformer with

120 volt primary and 24 volt/50VA secondary.

McDonnell & Miller

Installation & Maintenance

Instructions

MM-307(F)

with

QUICK

CHANGE

Cartridge

Summary of content (8 pages)

PAGE 1
McDonnell & Miller Series 101-A Electric Water Feeder Installation & Maintenance Instructions MM-307(F) ® Applications: with For use on low pressure boilers with cold water feed. The Series 101-A can be used with mechanical or electronic low water cut-off controls. QUICK CHANGE Cartridge WARNING Do not use automatic water feeders with manual reset LWCO’s. Failure to follow this warning could cause flooding, property damage, personal injury or death. SPECIFICATIONS 150 psi (10.5 kg/cm2) 25 psi (1.
PAGE 2
INSTALLATION STEP 1 - Determine Where to Install the Water Feeder IMPORTANT Boiler manufacturer schematics should always be followed. In the event that the boiler manufacturer’s schematic does not exist, or is not available from the boiler manufacturer, refer to the schematics provided in this document. Determine where to install the water feeder based on the following requirements: a. It must be installed within eyesight of the boiler. b.
PAGE 3
WARNING • All work must be performed by qualified personnel trained in the proper application, installation, and maintenace of plumbing, steam, and electrical equipment and/or systems in accordance with all applicable codes and ordinances. • To prevent electrical shock, turn off the electrical power before making electrical connections. • To prevent an electrical fire or equipment damage, electrical wiring insulation must have a rating of 167˚F (75˚C) if the liquid’s temperature exceeds 180˚F (82˚C).
PAGE 4
Wiring Diagram Legends 1. Bold lines indicate action to be taken in Step shown. 2. Regular black lines indicate existing wiring. For McDonnell & Miller Model 101A-120 Water Feeder and Series 67 Low Water Cut-Off with 120 volt burner circuit h. Connect wire (A) from water feeder to burner circuit Neutral wire. BURNER CIRCUIT i. Install jumper between terminals 2 and 3 of the low water cut-off. JUMPER j. Install wire (B) from water feeder to terminal 4 of the low water cut-off.
PAGE 5
For Model 101A-24 Water Feeder and Series 67 Low Water Cut-Off with 120 volt burner circuit h. Install wire (A) from burner circuit Neutral wire to the transformer input Neutral terminal. BURNER CIRCUIT i. Install wire (B) from burner circuit Hot wire to the transformer input Hot terminal. j. Install wire (C) from transformer output Neutral terminal to the water feeder. k. Install wire (D) from the water feeder to terminal 4 on the low water cut-off.
PAGE 6
For Model 101A-24 Water Feeder and Model PS-802-24 Low Water Cut-Off Replace existing 24 volt transformer on boiler with the McDonnell and Miller transformer Model 101-24 V-48 included with the Model 101A-24 water feeder. PS-802-24 LOW WATER CUT-OFF JUMPER BAR N H C W B BURNER h. Install wire (A) from the water feeder to terminal N on the low water cut-off. B i. Install wire (B) from the water feeder to terminal W on the low water cut-off. A j.
PAGE 7
TESTING NOTE: The water feeder will only restore the boiler water level to approximately 1/2” to 1” (13-25mm) above the burner cut-off level of the low water cut-off. Burner Off (Cold) Test Burner On (Hot) Test 1. Manually fill boiler until water level in the sight glass is more than half filled. 1. Manually fill the boiler to the boiler manufacturer’s recommended operating level. 2. With the room thermostat set at the lowest setting, turn on the power to the boiler and water feeder. 2.
PAGE 8
McDonnell & Miller MAINTENANCE SCHEDULE: Annually • Disassemble and inspect/clean strainer screen. Replace if screen is torn or not able to be cleaned. • Remove and inspect/clean cartridge. Replace if poppet does not move freely or debris cannot be removed. • Check all wires for brittle or worn insulation. More frequent cleaning or replacement may be required if used in locations where water treatment is required or in applications with high make-up water requirements.