27
Connecting the primary circuit
!
Please note
The components used must be resistant to the
heat transfer medium.
Never use zinc-plated/galvanised pipes.
1.
Equip the primary circuit with an expansion vessel
and safety valve (in accordance with DIN 4757).
Note
■
Expansion vessel must be approved to DIN 4807.
Diaphragms of expansion vessel and safety valve
must be suitable for the heat transfer medium.
■
Discharge and drain pipes must terminate in a
container that can hold the maximum possible
expansion volume of the heat transfer medium.
2.
Ensure adequate thermal and anti-vibration insula-
tion of all pipes routed through walls.
3.
Connect primary pipes to the heat pump
7
≥
DN80.
!
Please note
To prevent damage to the appliance, connect
on-site primary lines to the heat pump free of
load and torque stress.
The primary lines must not exert any pres-
sure onto the heat pump casing.
!
Please note
To avoid the formation of condensate inside
the heat pump, ensure the hydraulic connec-
tions on the primary side are tight.
■
With line entries, ensure the diaphragm
grommets on the l.h. side panel are seated
correctly.
■
Make line entries airtight.
4.
Insulate primary lines inside the building with ther-
mally insulating and vapour diffusion-proof materi-
als.
5.
Charge the primary circuit with Viessmann heat
transfer medium and vent.
Connecting the secondary circuit
1.
Equip the secondary circuit on site with an expan-
sion vessel and safety assembly (in accordance
with DIN 4757).
Fit the safety assembly to the on-site line in the
heating water return.
2.
Connect secondary lines to the heat pump
(
7
≥
DN65).
!
Please note
To prevent damage to the appliance, connect
on-site secondary lines to the heat pump free
of load and torque stress.
The secondary lines must not exert any pres-
sure onto the heat pump casing.
!
Please note
To avoid the formation of condensate inside
the heat pump, ensure the hydraulic connec-
tions on the secondary side are tight.
■
With line entries, ensure the diaphragm
grommets on the l.h. side panel are seated
correctly.
■
Make line entries airtight.
3.
Fill and vent the secondary circuit in accordance
with VDI 2035.
4.
Thermally insulate lines inside the building.
Note
■
In underfloor heating circuits, install a temperature
limiter on site to restrict the maximum temperature of
underfloor heating systems.
■
Ensure the minimum flow rate, e.g. by means of an
overflow valve (see Specification on page 89).
Installation sequence
Hydraulically connecting the primary/secondary…
(cont.)
5549 991 GB
Installation
Содержание 301.BS090
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