Viessmann VITOCELL 100-U - Operation with a Heat Pump in Conjunction with a Heating Lance for DHW Heating

A
DHW
B
Hot water inlet from the heat exchanger
C
Vitotrans 222 heat exchanger set
D
Plate heat exchanger
E
Heating circuit pump (primary), highly efficient
F
Air vent valve
G
Heating water flow
H
Heating water return
K
Heat source with a constant flow temperature (e.g. district heat-
ing, max. 75 ºC)
L
Line regulating valve
M
Non-return valve
N
Cylinder loading pump (secondary), highly efficient
O
Safety valve
*16
P
Common cold water connection with safety assembly to
DIN 1988
R
Vitocell 100-L (here: 500 l capacity)
S
Lower temperature controller (OFF)
T
Upper temperature controller (ON)
Operation with a heat pump in conjunction with a heating lance for DHW heating
During the cylinder heating process (no draw-off), a cylinder loading
pump
M
within the cylinder loading system withdraws cold water from
the bottom of DHW cylinder
O
, which is then heated in plate heat
exchanger
D
and resupplied to the DHW cylinder via heating lance
C
built into flange
B
. The generously sized outlet apertures in the
heating lance result in low flow velocities, which in turn provide a clean
temperature stratification inside the DHW cylinder.
Mounting the optional immersion heater EHE (accessory) into the
DHW cylinder flange enables DHW heating to be boosted further.
*16
Does not replace the DHW cylinder safety valve to DIN 1988.
Cylinder loading systems — Vitocell 100-L with Vitotrans 222
(cont.)
26
VIESMANN
DHW heating
5
5414 646 GB