Filling And Venting On The Secondary Side; Checking Expansion Vessels And Primary Circuit/Secondary Circuit Pressure; Checking The Electrical Connections For Firm Seating; Commissioning The System - Viessmann VITOCAL 350-G PRO Installation And Service Instructions Manual

Filling and venting on the primary side
3. Fill the primary circuit with Viessmann heat transfer
medium and vent.
Note
A minimum frost protection level of –16.1 °C (freez-
ing point) must be observed.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
■ Check the internal and on-site hydraulic
connections for leaks.
In the event of leaks, switch off the appli-
■
ance immediately. Drain the primary circuit
and check the seating of the seals.
Always replace damaged or displaced
seal rings.

Filling and venting on the secondary side

!
Please note
Commissioning when the secondary circuit is
empty causes appliance damage.
Fill and vent the secondary circuit before con-
necting the power supply.
Note
Before filling the system, observe VDI 2035 part 1.
1. Check the Victaulic connections in the heat pump
for leaks. The Victaulic couplings must be engaged
with a positive interlock and no gaps.
2. Open any on-site non-return valves if installed.
3. Check the pre-charge pressure of the expansion
vessel.

Checking expansion vessels and primary circuit/secondary circuit pressure

Observe engineering information.
Heat pump technical guide

Checking the electrical connections for firm seating

Commissioning the system

Commissioning is carried out in 3 stages:
1. Configuring the system
2. Configuring the operating mode
3. Adjusting operating parameters
Commissioning, inspection, maintenance
(cont.)
4. Fill (flush) and vent the secondary circuit.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
■ Check the internal and on-site hydraulic
connections for leaks.
In the event of leaks, switch off the appli-
■
ance immediately. Drain the secondary cir-
cuit and check the seating of the seals.
Always replace damaged or displaced
seal rings.
5. Check the system pressure and top up with water if
necessary.
Minimum system pressure: 0.8 bar (80 kPa)
Permiss. operating pressure: 2.5 bar (0.25 MPa)
The parameters and system controller configuration
must be matched individually as required (see follow-
ing chapters and service instructions for the
"Vitotronic SPS heat pump control unit, type 2.0").
57