Near Boiler Piping; Pressure Gauge - UTICA BOILERS UB90125 Installation, Operation And Maintanance Manual

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Copper supply and return piping must NOT be in-
stalled directly into aluminum boiler section castings
due to galvanic corrosion between dissimilar metals.
Iron or steel bushings or pipe nipples should be used
between copper system piping and boiler to make
final connection to boiler. Also, the use of dielectric
unions is acceptable. The packaged boiler is fur-
nished with iron piping in the front boiler section for
the supply and return connections.
When the installation of the boiler is for a new heat-
ing system, first install all of the radiation units (panels,
radiators, baseboard, or tubing) and the supply and re-
turn mains. After all heating system piping and compo-
nents have been installed, make final connection of the
system piping to the boiler.
A hot water boiler installed above radiation level must
be equipped with a low water cut off device (included
with boiler). A periodic inspection is necessary, as is
flushing of float type devices, per low water cut off man-
ufacturers specific instructions.
EXpansIon tanK and MaKE-up WatER
Determine required system fill pressure, system de-
sign temperature, and system water content. Boiler
Figure #6
dIapHRagM tYpE EXpansIon tanK pIpIng
Vii. Near Boiler PiPiNg
CAUTION
contains 2.6 gallons (U.S.). Size expansion tank ac-
cordingly. Consult expansion tank manufacturer for
proper sizing information. Connect properly sized ex-
pansion tank (not furnished) as shown in Figure #6 for
diaphragm type expansion tank. For diaphragm type
expansion tanks, adjust the tank air pressure to match
the system fill pressure. Install air vent (furnished) as
shown for diaphragm type expansion tank system only.
Install make-up water connections as shown and per
local codes. If a pressure reducing valve is used, ad-
just to match the system fill pressure. In connecting the
cold make-up water supply to the boiler, make sure that
clean water supply is available. When the water sup-
ply is from a well or pump, a sand strainer should be
installed at the pump.
pREssuRE RElIEF ValVE / tEMpERatuRE

pREssuRE gaugE

The boiler is furnished with a relief valve and temper-
ature pressure gauge in the boiler parts bag. Install
vent relief valve as shown in Figure #7. Provide ¾"
piping from the relief valve to a local floor drain, but
leave an air gap between piping and drain. No shut-
off of any description shall be placed between safety
relief valve and the boiler, or on the discharge pipes
between such safety valve and the atmosphere. In-
stallation of the safety relief valve shall conform to
ANSI/ASME Boiler and Pressure Vessel Code, Sec-
tion IV. The manufacturer is not responsible for any
water damage.
RElIEF ValVE dIscHaRgE pIpIng
10
Figure #7