Viessmann VITODENS 200-W Type B2HA Technical Manual page 9

Vitodens 200-W
(cont.)
With heating circuit connection set with low loss header
480
G
200
F
A
B
420
A Heating flow G 1½ (male thread) (connection possible to the left
or to the right)
B Heating return G 1½ (male thread) (connection possible to the
left or to the right)
C Expansion vessel connection G 1 (male thread)
D Heating circuit connection set with integral low loss header,
shown without thermal insulation (standard delivery)
E Condensate drain
F Gas connection Rp ¾
Note
■ The heating circuit connection set must be ordered separately.
■ Lay all required supply cables on site and route them into the
boiler in the specified area.
VITODENS 200-W
E
C
D
P
380
160
N
E
O
133
G Cable entry area at the back
H Without connection sets
K Recommended dimension for a single boiler system
L Recommended dimension for a multi boiler system
M With connection sets
N Balanced flue bend (accessories)
O Safety valve
(PL/IT: Without safety valve)
P Top edge, finished floor
Low loss header operating principle
The low loss header integral to the heating circuit connection set
should be sized for the max. flow rate that may occur in the overall
system.
When balancing the low loss header, adjust the flow rate on the
boiler side (V primary A) to approx. 10 to 30 % below the flow rate
on the system side (V secondary B) (reducing the return tempera-
ture).
1
VIESMANN
9