Download Viessmann VD2-950 Technical data

Connections
Vitorond 200, VD2 Series 320 to 1080 Installation
Water Side Connections (continued)
Return temperature elevation
Metric flange c/w
weld-on 2½ in.
NPT coupling
A suitable low temperature protection package from
Viessmann is necessary for Vitorond 200, VD2 boilers.
System
Selection of the appropriate package typically takes place
supply header prior to boiler delivery.
(ANSI), 4 in.
Please specify correct package at time of order.
Metric flange
c/w weld-on
2½ in. NPT
coupling
Install the 30% boiler flow package as illustrated.
The 30% boiler flow package consists of:
H 1 boiler pump
H 2 ball valves
H 1 flow check valve
Boiler supply
connection
(metric)
Metric flange
c/w weld-on
2½” NPT
coupling
System
return header
(ANSI), 4 in.
Boiler return
connection
(metric)
Legend
A Low water cut-off (standard equipment)
B Shunt pump
C Flow check valve
D Location of Honeywell aquastat
(to control boiler pump)
E Location of aJ sensor
(installed in stainless steel well)
All piping field supplied.
Install 100% boiler flow package as illustrated.
The 100% boiler flow package consists of:
System supply
header (ANSI)
H 1 3-way mixing valve
H 1 actuator
H 1 boiler pump
System
supply
Boiler supply
connection
(metric)
Legend
F Boiler pump
G 3-Way mixing valve
H Low water cut-off (standard equipment)
K Location of aJ sensor
(installed in stainless steel well)
All piping field supplied.
Boiler return
connection
(metric)
5285 429 - 03
System return
header (ANSI)
21