Connections
20
Safety Connections and Pressure Testing
(continued)
Performing pressure test on the boiler
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 with a maximum of 1½
times the maximum operating pressure
of the boiler.
1.
After installing safety devices (see
previous page), install temporary cap
on ¾” nipple extension (nipple for
pressure relief valve mounting).
2.
Cap supply and return connections.
3.
Connect ½” garden hose to boiler
drain valve at the back of the boiler
and fill boiler slowly until pressure
gage indicates max. 90 psig / 620
kPa.
4.
Maintain pressure for 15 minutes.
During time of pressure testing, do
not leave boiler unattended.
5.
Inspect all pipe joint connections, the
safety devices and boiler base with
flashlight for leaks.
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 safety nipple,
and install pressure relief valve
immediately instead of ¾” cap.
After boiler has passed pressure test,
proceed with installation.
Max. operating pressure
60 psig / 413 kPa
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Max. testing pressure
90 psig / 620 kPa
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Max. boiler temperature
250 °F / 120 °C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHW Side Connections
For the production of domestic hot
water, the boiler must be connected to
an indirect-fired domestic hot water
storage tank. Contact Viessmann for
control options. Water for domestic use
must
not
be drawn from the boiler for
any purpose. This boiler does
not
use a
tankless coil.
Installation Instructions
Domestic Hot Water Storage
Tank
5
1
6
7
4
6
3
v
1
.3
CAUTION
Do not use the front drain valve to fill
the boiler.
Exposing the boiler to pressures and
temperatures in excess of those listed
will result in damages, and will render
warranty null and void.
WARNING
Summary of Contents for Vitogas 100 GS1 Series
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