Weil-McLain EG Manual page 18

EG PEG EGH
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Connect piping – steam boilers
Figure 19
Connection to counterflow steam piping
18
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Gas firEd boilErs
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sEriEs boilEr manual
(continued)
Installing the relief valve
Install relief valve in tapping on top of boiler. See Table 4, page
10, for control tapping locations. See the tag attached to the relief
valve for manufacturer's instructions.
Follow the steps below to avoid potential severe per-
sonal injury, death or substantial property damage.
• When installing the relief valve, ensure that all connec-
tions, including the valve inlet, are clean and free from
any foreign matter.
• Mount the relief valve only in the vertical position, directly
connected to the tapping designated in the manual on top
of the boiler.
• Use pipe compound sparingly, or tape, on external threads
only.
• Do not use a pipe wrench! Use proper type and size
wrench on wrench pads only.
During operation, this valve may discharge large
amounts of steam and/or hot water. Therefore, to
reduce the potential for bodily injury and property
damage, a discharge line MUST be installed that:
• Is connected from the outlet to a safe point of discharge
with no intervening valve.
• Allows complete drainage of both the valve and the dis-
charge line.
• Is independently supported and securely anchored so as
to avoid applied stress as possible.
• Terminates freely to atmosphere where any discharge will
be clearly visible and is at no risk of freezing.
• Is, over its entire length, of a pipe size equal to or greater
than that of the valve outlet.
Use only schedule 40 metal pipe for discharge. (Do not
use schedule 80, extra strong or double strong pipe or
connections.) DO NOT CAP, PLUG OR OTHERWISE
OBSTRUCT DISCHARGE PIPE OUTLET! If discharge
is piped upward, a condensate drain must be provided in
the elbow below the vertical pipe to prevent condensate
from returning into the valve. Failure to comply with these
instructions will cause a dangerous spray of hot water and
steam that would cause severe personal injury or death.
Part Number 550-110-639/0512