Performing Pressure Test On The Boiler; Hot Water Temperature And System Pressure - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Safety Connections and Pressure Testing

Performing pressure test on the boiler

Hot water temperature and system pressure

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Fig. 22
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Fig. 23
The boiler must be leak tested before
being placed in operation. Before boiler
is connected to piping or electrical
power supply, it must be
hydrostatically pressure tested.
1. Cap supply and return connections
(¾" NPT Male).
2. Connect a ½" garden hose to boiler
drain valve at the bottom of the
boiler and fill boiler slowly until
pressure gage indicates max.
4 bar/60 psig.
3. Maintain pressure for 15 minutes.
During time of pressure testing, do
not leave boiler unattended.
4. Inspect all pipe joint connections and
safety devices with a flashlight for
leaks.
A lower manometer reading than
4 bar/60 psig usually indicates loss
of water due to leakage. All leaks
must be repaired.
Hot water temperature reading
The hot water reading is constantly
ºF
displayed during operation.
Water pressure reading
The boiler water pressure is displayed
on the analog gage.
(continued)
5. After 15 minutes, release water
pressure from boiler by opening
boiler drain valve slowly, remove
caps from supply and return
connections as well as ¾" cap from
2" nipple, and install pressure relief
valve immediately instead of ¾"
cap.
After boiler has passed the pressure
test, proceed with the installation.
Exposing the boiler to pressures and
temperatures in excess of those
listed will result in damage, and will
render warranty null and void.
See page 45 for fill procedure.
.
Boiler Connections
WARNING
25