ITT McDonnell & Miller 14-B Series Installation & Maintenance Instructions Manual Download Page 1

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Series 14-B Ball Type
Blow Down Valve

Applications:

For Series 47, 67, and 70 boiler control blow
down valve replacement.

• 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, wear heat resistant gloves when opening and closing valves, or

handling hot equipment.

• To prevent serious burns, allow the control and surrounding equipment to cool to 80˚F

(27˚C) and allow pressure to release to 0 psi (0 bar) before servicing.

• When flushing control (blow down), hot water and steam will flow out. To prevent serious

personal injury, connect a drain pipe to the control opening to avoid exposure to steam
discharge.

• To prevent flooding, do not puncture float.

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

WAR

NING

CAU

TION

WARNING

Series 14-B

EASY
OPEN
HANDLE!

Installation & Maintenance
Instructions MM-702(D)

Summary of Contents for McDonnell & Miller 14-B Series

Page 1: ...serious burns wear heat resistant gloves when opening and closing valves or handling hot equipment To prevent serious burns allow the control and surrounding equipment to cool to 80 F 27 C and allow...

Page 2: ...n valve D B D C C D B STEP 1 Preparation INSTALLATION TOOLS NEEDED One 1 flathead screwdriver one 1 scraper one 1 pipe wrench one 1 hammer and pipe sealing compound a Shut off the boiler and disconnec...

Page 3: ...ontrol A If necessary use a hammer to tap it loose D D A A g Inspect the float chamber E for debris Carefully remove any debris mud or other for eign matter which may obstruct the float s full range o...

Page 4: ...mble as shown J H Gasket Teflon Seal Teflon Seal Spring Ball Housing J b Position the blow down valve H onto the control s mating surface G So that it s handle K is acces sible and is able to swing th...

Page 5: ...4 20mm NPT blow down pipe M and screw it into the control N Tighten the pipe M with a pipe wrench P to approximately 47 ft lb 64 N m M P N g Turn the blow down valve handle K to its closed position K...

Page 6: ...he problem Other equipment may be involved and the sys tem should be inspected by qualified personnel d Verify that the burner is off and that the system is filling with water by observing the water l...

Page 7: ...akage continues follow Step 1 to remove the blow down valve H Closely following the installation instructions replace it 2 If leakage occurs around the valve shaft S follow Step 1 to remove the blow d...

Page 8: ...ter requirements PROCEDURE 1 Blow down the low water cut off when the water level is at its normal level and the burner is on Slowly open the blow down valve until it is fully open and observe the wat...