Xylem MM 702E Series 14-B Ball Type Blow Down Valve - Manual (Page 7)

7
To prevent serious personal injury from steam blow down, connect a drain pipe to avoid exposure to steam
discharge.
Failure to follow this caution could cause personal injury or death.
! WARNING
IMPORTANT: If the control (A) does not blow down
and/or the burner does not shut-off, close the blow
down valve (H), immedialety shut off the boiler, and
correct the problem. Other equipment may be involved
and the system should be inspected by qualified per-
sonnel.
e. Allow the system to build to its normal operating pres-
sure and check for leakage around the mating surface
(G), the shaft (S), and the pipe opening (T).
1.
If leakage occurs around the mating surface (G),
retighten the four (4) screws. If leakage 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 down valve (H). Closely
following the installation instructions, replace it.
3. If leakage occurs around the pipe outlet (T), follow
"Step 1" to remove the blow down valve (H) and
verify that it has been properly assembled as shown
in "Step 2-a". Inspect the blow down valve (H) for
debris which may prevent it from completely closing
or sealing. If leakage continues, follow "Step 1" to
remove it. Closely following the installation instruc-
tions, replace the blow down valve (H). T
G
S
G
H
f. Open the blow down valve (H) to "blow down" the
control (A). The burner should shut-off.
A
H
g. Close the blow down valve (H) and check for
leakage by following the instructions in "Step 3"
section e.
H
INSTALLATION COMPLETE