Trim Piping; System Piping - UTICA BOILERS UBSSC-050 Installation, Operation & Maintanance Manual

WARNING
!
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
FIGURE 5-2 Safety Relief Valve Discharge Piping
Check Local Codes
For Maximum
Distance To Floor
FIGURE 5-3 Temperature Pressure Gauge and
Drain Valve Installations
Temperature Pressure
Gauge shown at
System Supply
Connection
5 - HYDRONIC PIPING
Safety Relief Valve
Gas Supply
Drain Valve shown
at System Return
Connection to Boiler
fi gure 5-2.
• Use ¾" or larger pipe.
• Use pipe suitable for temperatures of 375°F (191°C)
or greater.
• Individual boiler discharge piping shall be independent
of other discharge piping.
• Size and arrange discharge piping to avoid reducing
safety relief valve relieving capacity below minimum
relief valve capacity stated on rating plate.
• Run pipe as short and straight as possible to location
protecting user from scalding and properly drain
piping.
• Install union, if used, close to safety relief valve outlet.
• Install elbow(s), if used, close to safety relief valve
outlet and downstream of union (if used).
• Terminate pipe with plain end (not threaded).

5.4 Trim Piping

• Temperature - Pressure Gauge. Install temperature
pressure gauge using nipple, tee and bushing provided
with boiler. See fi gure 5-3.
• Drain Valve. Install drain valve using nipple, tee and
bushing provided with boiler. See fi gure 5-3.

5.5 System Piping

• Systems with automatic fi ll valves require back fl ow
prevention device.
• Single boiler system. See fi gures 5-4, 5-5, 5-6, 5-7 for
general guidance. Additional considerations:
• Control system designed for single central heating
pump. Installer responsible for integration of
multiple central heating pumps.
• Control system allows domestic hot water
prioritization. Function could be lost if central
heating pump not directly connected to control
system.
• Multiple boiler system. See fi gure 5-8 for general
guidance. Additional considerations:
• Control system requires equivalent water
temperatures entering each boiler to properly
sequence and adjust system supply temperature.
• Install multi boiler sensor kit. See "Parts, Kits &
Optional Accessories" manual for part number.
12