Installation Examples - Viessmann VITODENS 200-W B2HE 85 Installation Instructions Manual

Boiler Connections / Installation Examples
Adjusting Pump Rate of Integrated Circulation Pump

Installation Examples

Please note that in the following piping layout examples all pumps are field supplied.
IMPORTANT
The examples on the following pages depict possible
piping layouts of the Vitodens 200-W boiler equipped
with Viessmann System Technology.
For boiler and tank combinations, please install only
feasible combinations listed in the Viessmann Price List.
Please note that the following examples are simplified
conceptual drawings only!
Piping and necessary componentry must be field verified.
A low water cut-off (LWCO) must be installed where
required by local codes.
Proper installation and functionality in the field is the
responsibility of the heating contractor.
WARNING
If a DHW storage tank other than a Viessmann Vitocell
300 tank is used, the installer must verify proper
operation of the Viessmann DHW tank temperature
sensor with the original manufacturer of the tank.
Viessmann strongly recommends the installation of a
temperature tempering valve in the DHW supply line.
38
Residual Head B2HE 150-199
Vitodens 200-W B2HE 85, 120, 150, 199 Installation
(continued)
IMPORTANT
DHW supply and return piping between boiler DHW
connections and the Viessmann DHW tank connections,
shall be a minimum of 1a in. nominal pipe diameter
connection outlet sizes provided on the boiler and the
DHW tank). This will ensure the residual head of the field
supplied pump is fully utilized to overcome the resistance
of the DHW heat exchanger coil and to provide sufficient
water flow to the boiler heat exchanger.
In non-Viessmann DHW tank applications, perform, in
addition to the above, accurate calculations for DHW
tank coil pressure drop versus boiler pump (field supplied)
residual head to ensure sufficient water flow to the boiler
heat exchanger. Failure to heed the above instructions
may cause boiler short-cycling and inadequate DHW
supply.