Filling And Venting On The Secondary Side; Commissioning, Inspection, Maintenance; Commissioning The System; Configuration Procedure - Viessmann BW 35 .AHT PW Series Installation And Service Instructions Manual

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 tightness. The Victaulic couplings must be form-
locked and fitted together seamlessly.
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

Commissioning the system

Commissioning is carried out in 3 stages:
■ 1. System configuration
■ 2. Operating mode configuration
3. Adjusting operating parameters
■
Required instructions:
■ Service instructions for "PLC control unit"
■ Operating instructions for "PLC control unit"
■ Standard wiring diagram for 350-HT Pro SA/PW
The system is configured with the aid of a commission-
ing assistant. Parameters must be set and the system
controller configured individually according to require-
ments (see the following chapter and service instruc-
tions "PLC control unit").

Configuration procedure

Service instructions for "PLC control unit"

Commissioning, inspection, maintenance

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
required.
Minimum system pressure: 0.8 bar (80 kPa)
Permissible operating pressure: Max. 10 bar
(1000 kPa)
Note
The type and extent of parameters depend on the heat
pump type and the system configuration.
Observe the instructions in the separate service
instructions for the "PLC control unit", otherwise the
appliance warranty will be void.
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