Weil-McLain Ultra Oil, Manual

Page: 14 / 40

®
WATER BOILER
—
Boiler Manual
General piping information:
ASME or Canadian requirements
s )FINSTALLATIONISTOCOMPLYWITH!3-%OR#ANADIAN
requirements, an additional high temperature limit
is needed. Install control in supply piping between
BOILERANDISOLATIONVALVE3ETCONTROLTOAMINIMUM
of 20 °F above set point of the boiler aquastat. Maxi-
mum allowable set point is 220 °F. Wire control as
shown on wiring diagram (page 21).
Low water cutoff devices
s 5SEALOWWATERCUTOFFDEVICEWHEN
s "OILERISINSTALLEDABOVERADIATIONLEVEL
s 2EQUIREDBYCERTAINSTATEORLOCALCODESORINSURANCE
companies.
s 5SEALOWWATERCUTOFFDESIGNEDFORWATERINSTALLA -
tions.
s 0ROBETYPEISRECOMMENDED
s 0URCHASE AND INSTALL IN TEE IN SUPPLY LINE ABOVE
boiler. Wire per wiring diagram, page 21.
Backflow prevention
s 5SEBACKmOWCHECKVALVEINCOLDWATERSUPPLYAS
required by local codes.
Install piping:
Pipe sizing
s 3EE4ABLEFORPIPESIZINGFORNEARBOILERPIPINGAND
SINGLEZONEPIPING
Near-boiler piping
(with diaphragm expansion tank)
s 3EE&IGUREPAGE
Near-boiler piping
(with closed expansion tank)
s 3EE&IGUREPAGE
Multiple-zone piping
s 3EEPAGE
Low-temperature system piping
s 3EEPAGE
Chiller system piping
s 3EEPAGE
For multiple-boiler piping
s 2EFERTO7EIL-C,AINSh0RIMARY3ECONDARY0IPING
Guide.”
Relief valve
s )NSTALLRELIEFVALVEVERTICALLYINELBOWSUPPLIED3EE
Figure 6 or 7 for location.
s 3EE7!2.).'ATRIGHT
s !LSOREFERTOTAGATTACHEDTORELIEFVALVEFORMANU
-
facturer’s instructions.
2ELIEFVALVEDISCHARGEPIPING
To avoid water damage or scalding
due to relief valve operation:
s $ISCHARGE LINE MUST BE CONNECTED TO
relief valve outlet and run to a safe place
of disposal. Terminate the discharge
line to eliminate possibility of severe
burns should the valve discharge.
s $ISCHARGELINEMUSTBEASSHORTASPOS
-
SIBLEANDBETHESAMESIZEASTHEVALVE
discharge connection throughout its
entire length.
s $ISCHARGE LINE MUST PITCH DOWNWARD
from the valve and terminate at least
6” above the floor drain where any
discharge will be clearly visible.
s 4HE DISCHARGE LINE SHALL TERMINATE
plain, not threaded, with a material
serviceable for temperatures of 375 °F
or greater.
s $ONOTPIPETHEDISCHARGETOANYPLACE
WHEREFREEZINGCOULDOCCUR
s .OSHUTOFFVALVESHALLBEINSTALLEDBE
-
tween the relief valve and boiler, or in
the discharge line. Do not plug or place
any obstruction in the discharge line.
s &AILURETOCOMPLYWITHTHEABOVEGUIDE
-
lines could result in failure of the relief
valve to operate, resulting in possibil-
ity of severe personal injury, death or
substantial property damage.
s 4EST THE OPERATION OF THE VALVE AFTER
FILLING AND PRESSURIZING SYSTEM BY
lifting the lever. Make sure the valve
discharges freely. If the valve fails to
operate correctly, replace it with a new
relief valve.
Connect water piping
4ABLE Water piping sizing
Model
Piping to
system
(inches)
Piping from
system
(inches)
UO-3 1¼ 1¼
UO-4 1¼ 1¼
UO-5 1½ 1½
Note: sizing based on 20°F temperature rise through boiler.
Part number 550-141-986/0112
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