Table of Contents
Advertisement
Installation Examples
General
The schematics on the following pages
are to be seen as guidelines only. They
further do not display all system
varieties, safety devices, or concepts
possible. Specific system layouts may
be further discussed with the local
Viessmann sales representative office.
Clearances
A minimum of 2" circumferential
clearance from non-insulated hot water
pipes to combustible construction must
be maintained. In cases where the pipes
are insulated with pipe insulation of
appropriate and sufficient thickness and
insulation values, the above clearance
may be reduced to 0".
CAUTION
For underfloor heating applications,
an additional immersion or strap-on
aquastat must be installed in the low
temperature underfloor loop (ahead of
the mixing valve) to de-energize the
pump and/or boiler to prevent
overheating. High water temperatures
can damage concrete slabs.
Waterside flow
20 50
16 40
12 30
8 20
4 10
3.2
8
2
5
1.6
4
1.2
3
0.8
2
0.4
1
0.5
1
2.2
4.4
Waterflow
VR2-40 to -63
Flow rates
The relationship between boiler flow rate and temperature rise is according
to the formula:
Boiler output (Btu/h) = 500 x flow (USGPM) x Rise (°F)
The following chart lists typical flow rates for the Vitorond boiler:
VR2
Boiler Model
20°F rise
USGPM
3
m
/h
30°F rise
USGPM
3
m
/h
3
2
3
4
5
6
7
m
/h
9
13
18
22
26
31
USGPM
-40
-50
14
17.2
3.2
3.9
9.3
11.5
2.1
2.6
Connections
-63
21.5
4.9
14.3
3.2
21
Advertisement
Table of Contents
