Water Side Connections - Viessmann VITOROND 100 Installation And Service Instructions Manual

Connections

Water Side Connections

Legend
Boiler water supply connection, pressure relief valve
High limit control location
Boiler water return, drain and automatic feed
Legend
Honeywell high limit control
Immersion well
Hex bushing, 1¼" x ¾"
Tee, 1½" x 1½" x ¾"
Nipple, ¾" x 3¾"
18
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Pressure relief valve
Flue gas adaptor, Ø 5"
Tee, 1½" x 1½" x ¾"
Drain valve (sediment faucet), ¾"
1½" NPT
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1¼" NPTF
1½" NPT
IMPORTANT
This boiler is designed for closed loop,
forced circulation heating systems only.
1. Flush heating system thoroughly
(particularly with existing systems
which have been in operation for
years).
CAUTION
Failure to flush the heating system
could cause system sludge to settle
in the boiler, causing overheating and
failure. This type of failure is not
covered under warranty.
2. Connect system supply to
NPT fittings pictured below.
Connect the system return to
using NPT fittings pictured below.
See installation examples in following
section.
IMPORTANT
We recommend the installation of a
spring-loaded flow-check valve in
heating circuits without mixing valves.
This serves to avoid uncontrolled
gravity circulation of heat into the
heating system during summer months.
using