Boiler Features; Installation; Cast-Iron Sections - Viessmann Vitogas 050 Rs Series Installation & Service Manual

1.0 Shipping of boiler
The boiler is shipped in two pieces. An assembled cast-
iron heat exchanger is shipped on a wooden pallet. The
second piece is a crate containing the jacket, draft
hood, gas train, and manifold. Boiler requires final field
assembly.
Rear
Fig. 1
Assembled cast-iron heat exchanger
RS-8
RS-11 56
RS-14 66
Crate is 42˝ deep for all sizes
Fig. 2
Crate containing draft hood and jacket
Both pieces (Fig. 1 and Fig. 2) will fit through a standard
32˝ doorway. Casting may be ordered split in two or
more sections to facilitate handling. Refer to separate
heat exchanger assembly instructions.
Assembly of split cast-iron heat exchanger requires the
use of a Viessmann draw tool, which must be specified
at time of ordering. See page 30 for use of draw tool.
1.1

Boiler features

The Vitogas 50, RS boiler series includes the following
features and standard equipment:
– Cast-Iron sections of wet base design, fully
assembled
– Boiler ID coding card
– Intermittent pilot ignition system
– Stainless steel burner tubes
– Horizontal to vertical draft diverter
– Accessory pack including 50 psi pressure relief valve,
air vent and pressure gauge
4
Cast iron
heat exchanger
Front
Wooden pallet
1
23 ⁄ ˝
2
(600mm)
1
56 ⁄ ˝
2
1
⁄ ˝
2
1
⁄ ˝
2
The boiler comes with water connections on the right
hand side in the standard configuration. If required, the
connections can be made on the left side by reversing
the gas inlet pipe and reversing the flange connections
for the water connections. See section 2.2 and piping
layouts Figs. 11, 23, 24 and 25.
Max. boiler operating pressure 60 psi (414 kPa).
Max. boiler temperature 248°F (120°C).
Any damages caused by operation in excess of the
above mentioned temperatures and pressure are not
the responsibility of Viessmann Manufacturing
Company Inc.
List of parts shipped
For a complete list of parts refer to Replacement Parts
List on page 25.
2.0

Installation

Important:
Note that the sheet metal enclosure is designed in such
a way that the enclosure can be installed after all water
piping, pipe insulation, draft hood and venting has been
completed. Install sheet metal enclosure last to
minimize the chance of damage to the enclosure. Final
gas piping is done after installing sheet metal enclosure.
Before boiler is connected to a piping/heating system
which has been in service (boiler is a replacement
boiler), piping system should be flushed thoroughly with
25˝
water in order to remove sludge, rust, debris, or other
contaminants, especially in large piping systems such
as old gravity systems. Failure to remove contaminants
can lead to boiler failure.
Note: The RS boiler is for use in closed loop hot water
forced circulation systems only. Do not use in
steam applications.
2.1 Installation of supply and return flanges
Prior to placing the boiler in its installed position, ensure
that the supply and return flanges are on the correct side
of the boiler. The standard configuration has the supply,
return connections on the right side. To reverse the
water connections see section 2.2. Also see Fig. 23 on
page 18.
2.2 Installation with piping on left side
To install boiler with water piping on the left side instead
of the right, the following must be done:
a) Remove the supply flange and gasket, and the
opposite flange threaded 1˝ NPT (i.e. pressure
relief valve fitting).
b) Remove the return flange, gasket, 60mm studs,
and the opposite flange threaded
cock fitting). NOTE that the return flange is fitted
with a water distribution tube. Holes are drilled to
distribute water vertically into the casting and
horizontally into the wet base casting legs. When
3
⁄ ˝ NPT (i.e. drain
4