Domestic Water Connections - Viessmann VITOCELL 300 EVI Series Installation Instructions Manual

Set-up and Connections

Domestic Water Connections

Note: - Connect all pipe work with detachable fittings.
- Seal connections that are not required with red brass
caps.
- Equip the DHW circulation pipe with circulation
pump, check valve and time switch. Gravity
operation is only feasible to a limited degree.
- Always install DHW group of tanks with
connected DHW circulation.
1. Pipe together boiler and tank as illustrated. Connections
must be accessible for service (use factory supplied
adaptors).
2. Insulate domestic hot water supply piping.
IMPORTANT
This is a simplified conceptual drawing only! Piping and
necessary componentry must be field verified. Proper
installation and functionality in the field are the responsibility
of the heating contractor.
16
Vitocell 300-V Installation Instructions
Legend
A
Spring-loaded flow check valve
B
Discharge pipe
C
Anti-scald tempering valve (field supplied)
SV Shut-off valve
FV Flow check valve
PR Pressure reducing valve
D Drain
DCW Cold water supply lines
PGC Pressure gage connection
E Precharged expansion tank (required where backflow
preventer is installed; check local plumbing codes
and requirements)
BP1 Backflow preventer
BP2 Backflow preventer
T&P Temperature and pressure relief valve
DW Water filter
DHW Domestic hot water supply
RP Recirculation pipe
RPU Recirculation pump
IMPORTANT
Use a Loctite 55 string and pipe dope on all threaded
nipples on tank.