background image

9

X

Z

TO BOILER

Feed

Valve

By-Pass

Valve

Check Valve

WATER

SUPPLY

Make sure that the water level in the boiler is above the
closing level of the feeder.

Close valve 'X' and slowly open union 'Z' to determine if
valve is leaking.

• If water is leaking from the union, the valve needs to 

be serviced.

• If no water leaks from the union, the feeder operation 

is not the cause of the flooding.

Broken Union Test

E

D

B

H

x 4

A. Using a 1/2" socket wrench, unscrew the four (4) hex-head 

bolts (B) that secure the strainer basket (H) to the valve 
assembly (E).

B. Using a 13/16" socket wrench, unscrew the cartridge (D) 

and remove.

C. Clean any debris (scale, rust, etc.) from strainer and cartridge.

Poppet inside cartridge must move freely. Replace if debris 
cannot be removed or poppet does not move freely.

D. Lubricate cartridge o-rings using silicone type lubricant and 

re-install.

E. Re-install strainer basket.

Removal of cartridge and strainer for inspection and cleaning

Содержание McDonnell & Miller 247 Series

Страница 1: ...nt 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 steam pressure At least two controls should be connected in seri...

Страница 2: ...2 NPT 47 47 2 Maximum Boiler Pressure 25 psi 1 76 kg cm2 247 247 2 Maximum Boiler Pressure 30 psi 2 1 kg cm2 Electrical Ratings Series 47 Water Feeders and Series 47 2 Combination Water Feeder Low Wat...

Страница 3: ...GS PARALLEL TO BOILER WITH TURNEDY FITTINGS 3 STEP 1 Determine Best Position to Install the Water Feeder to clear obstructions that may be encountered on the side of the boiler INSTALLATION TOOLS NEED...

Страница 4: ...E are greater than 14 356 mm apart invert the black Y casting F as depicted in the diagram to the bottom right and install a longer nipple G F INVERTED Y CASTING Note Reverse union nuts packing and p...

Страница 5: ...onnection Slide union nut U over tailpiece P Using a pipe wrench tighten the tailpiece P into the 1 2 15 mm NPT tapping Q in the lower half of body K Tighten to 54 ft lb 74 N m 5 J H K e Remove the pl...

Страница 6: ...b 74 N m Tighten both union nuts U b Reinstall water glass and gauge connections to Y fittings T When using pipe or tape sealant on the external threads of pipes or fittings follow the manufacturers i...

Страница 7: ...lectrical Wiring Only for Series 47 2 247 2 AA a Using the flathead screwdriver loosen the two 2 screws that secure the switch cover AA Remove cover 7 IMPORTANT Boiler manufacturer schematics should a...

Страница 8: ...in the diagram to the right Low water cut off switch and or low water alarm Pilot switch for motor starter or relay The feeder should be blown down after initial installation before leaving site It s...

Страница 9: ...he flooding Broken Union Test E D B H x 4 A Using a 1 2 socket wrench unscrew the four 4 hex head bolts B that secure the strainer basket H to the valve assembly E B Using a 13 16 socket wrench unscre...

Страница 10: ...er Solution Replace float e Cause Equalizing piping is plugged Solution Clean or replace piping f Cause Water supply is above 150 psi Solution Install pressure reducing valve to reduce water pressure...

Страница 11: ...surfaces DO NOT use sharp objects to scrape off any accumulations of sediment or debris Unit is making noise a Cause Under certain system conditions there may be a vibration when the valve mechanism...

Страница 12: ...er needs Developing new technologies that will improve the way water is used conserved and re used in the future is central to our work We move treat analyze and return water to the environment and we...

Отзывы: