Viessmann VITODENS 222-F Technical Manual page 28

Installation accessories
Specification assembly kit with mixer
Assembly for heat distribution via one heating circuit with mixer and
one heating circuit without mixer, designed to match the appliance.
For installation on the boiler.
Comprising:
■ Plate heat exchanger for system separation of the heating circuit
with mixer
■ Variable speed high efficiency circulation pump for the heating cir-
cuit with mixer
■ 3-way mixer with mixer motor
■ Mixer PCB, capable of communicating with Vitotronic 200 via
KM BUS
■ Adjustable bypass
■ Connection set for installation on finished or unfinished walls, with:
– Connection pipes
– Shut-off valves (R ¾) for heating water flow and return with
boiler drain & fill valve
– 2 connectors for DHW (R ½)
– Gas shut-off valve (R ½) with thermally activated safety shut-off
valve
Residual head of the integral circulation pump for the heating circuit with mixer
600 60
500 50
4
400 40
300 30
200 20
100 10
0 0
0 100
Flow rate in l/h
Calculating the transferable heating output (examples)
The maximum heating output that can be transferred via the plate
heat exchanger of the assembly kit is 14 kW. For balanced flow rates
between the regulated heating circuit (assembly kit) and the unregu-
lated heating circuit (radiator heating circuit), the pressure drop in
the assembly kit must be increased.
For this, the line regulating valve with flow indicator available as an
accessory can be fitted to the primary side of the plate heat
exchanger, i.e. between the flow and return. The nominal circulation
water volume of the boiler (see specification), minus the flow rate
through the plate heat exchanger of the assembly kit, results in the
flow rate of the unregulated heating circuit.
Example:
Vitodens 222-F, 26 kW
■ Nominal amount of circulation water at ΔT 20 K: 1018 l/h
■ Heating output for regulated heating circuit (assumed): 13 kW
■ Resulting flow rate, primary side, plate heat exchanger at ΔT 20 K:
560 l/h ≙ 9.3 l/min (to be set via the line regulating valve)
■ Flow rate of the unregulated heating circuit: 1018 l/h – 560 l/h =
458 l/h
VIESMANN
28
(cont.)
Min.
200 300 400 500 600
■ Flow temperature sensor
■ Cover, designed to match appliance
■ Balanced flue extension, boiler flue connection
The heating circuit without mixer is supplied by the integral circula-
tion pump of the Vitodens. For an installation scheme for operation
with the assembly kit, see www.viessmann-schemen.com.
The assembly kit can only be used in conjunction with the Vitotronic
200.
Max. transferable heating output of the heat-
ing circuit with mixer (ΔT 10 K)
Max. flow rate of the heating circuit with mixer
(ΔT 10 K)
Permiss. operating pressure
Max. power consumption
Weight (incl. packaging)
700 800 900 1000 1100 1200
Connection set for DHW circulation pump
Part no. 7514 306
For installation in the appliance
Components:
■ High efficiency circulation pump
■ Flow regulating valve
■ Pipe assembly with thermal insulation
Note
Vitodens with loading cylinder or solar cylinder also requires an AM1
or EA1 extension for connection to the Vitotronic.
kW
l/h
bar
W
kg
Max.
1300 1400
VITODENS
14
1200
3
48
20