Performing Boiler Pressure Test - Viessmann VITODENS 200-W Installation Instructions Manual

Boiler Connections
Safety Connections and Pressure Testing
Performing a boiler pressure test
26
(continued)
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. After installing safety devices (see
previous page), install temporary cap
on ¾" x 2" nipple.
2. Cap supply and return connections.
3. Connect ½" garden hose to boiler fill
valve at the bottom of the boiler and
fill boiler slowly until pressure gage
indicates max. 4 bar / 60 psig.
4. Maintain pressure for 15 minutes.
During time of pressure testing, do
not leave boiler unattended.
5. 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.
6. 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.
7. After boiler has passed pressure
test, proceed with the installation.
Max. operating pressure
4 bar / 60 psig
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing pressure
6 bar / 90 psig
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Max. boiler water temperature
210°F / 99°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
Exposing the boiler to pressures and
temperatures in excess of those
listed will result in damages, and will
render warranty null and void.