Installation Guide

50 Rinnai I-Series Condensing Boiler Solo Manual
• Purge the heang system to remove all
debris and air. Debris and air in the lines
will damage the boiler.
• When removing the plasc sealing caps
from the boiler connecons, water may
come out of the boiler due to live re
tesng during manufacturing.
• The boiler, when used in connecon with
a refrigeraon system, must be installed
so the chilled medium is piped in parallel
with the boiler with appropriate valves
to prevent the chilled medium from
entering the boiler.
• The boiler piping system of a hot water
boiler connected to heang coils located
in air handling units where they may be
exposed to refrigerated air circulaon
must be equipped with ow control
valves or other automac means to
prevent gravity circulaon of the boiler
water during the cooling cycle.
• Some installaons with mulple zone
valves may require a dierenal bypass,
which will prevent excessively high ow
rates through a single zone when the
other zone valves are closed.
To connect the water supply, follow the
instrucons below.
For standard installaons, refer to the “Piping
Diagram for Basic Central Heang
Installaon” in this chapter.
Plumb the heang return line to the
heang return connecon on the
boom of the boiler.
CAUTION
• Guidelines
• Instrucons
• Common CH Components
• Piping Diagram for a Basic CH System
(Without Hydraulic Separaon)
• Piping Diagram for a Basic CH System
(With Hydraulic Separaon)
• Hydraulic Separaon
• Connect the Pressure Relief Valves
• Connect the Condensate Drain Line
• Condensate Pump Safety Switch
Wiring
Topics in this secon
7
The boiler may not be installed directly to
a heang system where polybutylene or
other oxygen permeable piping is used.
Water connecons to the boiler should
follow all state and local plumbing codes.
IMPORTANT
• It is required to include an air separator
on the central heang supply of the
system.
• System piping should be insulated when
freezing is a potenal concern.
• All piping must comply with local, state,
naonal or ASME code as appropriate.
Heang Return Connecon