25
q. After all sections have been drawn up, the
draw-up rod nuts should be loosened until
nger tight and then tightened ½ turn with
a wrench.
C. HYDROSTATIC TEST — After the boiler sections
have been assembled, it is essential that the boiler be
hydrostatically tested before the canopy, ue cover
plates, jacket, or piping is installed.
1. Tankless Heater Installation
If boiler is ordered with tankless heaters, install
heaters with the gaskets provided. Table IX gives
the maximum number of heaters permissible per
assembly and the heater ratings.
2. Plug all boiler tappings and ll boiler completely
with cold water. Allow cold ll water to reach room
temperatue before sealing boiler and pressurizing.
DO NOT install gauge until after hydrostatic testing the
boiler. Gauge failure may result.
N’installez la jauge qu’après avoir testé hydrostatique la
chaudière. Une défaillance de la jauge peut en résulter.
3. All completed boilers must satisfactorily pass the
prescribed hydrostatic test.
a. HOT WATER BOILERS: The assembled boiler
must be subjected to a hydrostatic test of not less
than 1½ times the maximum allowable working
pressure, as established by the relief valve
provided with the boiler. For example, a boiler
with a 50 psi relief valve must be subjected to a
test pressure of 75 psig to 85 psig.
Failure to properly hydrotest all boilers at the correct
pressure may result in section assembly failure in
operation.
Le fait de ne pas hydrotester correctement toutes les
chaudières à la pression correcte peut entraîner une
défaillance de l’assemblage de la section en cours de
fonctionnement.
4. EXAMINE BOILER CAREFULLY, INSIDE AND
OUTSIDE, to insure against leaks from cocked
nipples or through concealed breakage caused in
shipping and handling. This precaution is for your
protection and will simplify handling of necessary
replacements and adjustment claims.
5. After making certain that there are no leaks, drain
boiler and remove plugs for boiler trim and other
connections.
Figure 10: Boiler Section Assembly
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