VENTING THE BRINE SYSTEM
Level vessel
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Check the fluid level in the level vessel (CM2).
If the fluid level has dropped, top up the sys-
tem.
1. Close the valve under the vessel.
2. Disconnect the connection on top of the
vessel.
3. Fill with brine until approx 2/3 of the ves-
sel is full.
4. Reconnect the connector at the top of the
vessel.
5. Open the valve under the vessel.
If the pressure in the system needs to be raised, this is done
by closing the valve on the outgoing main line when the
brine pump (GP2) is in operation and the level vessel (CM2)
is open, so that liquid is drawn down from the vessel.
Expansion vessel
If a pressure expansion vessel (CM3) is used
instead of a level vessel, the pressure level is
checked with the pressure gauge (BP6). If the
pressure drops, the system should be replen-
ished.
Start-up and inspection
START GUIDE
NOTE
There must be water in the climate system before
S1156 is started.
NOTE
With several heat pumps connected, the start
guide must first be run in the subordinate heat
pumps.
In the heat pumps that are not the main unit, you
can only make settings for each heat pump’s cir-
culation pumps. Other settings are made and
controlled by the main unit.
1. Start S1156 by pressing the on/off button (SF1).
2. Follow the instructions in the display’s start guide. If the
start guide does not start when you start the S1156, you
can start it manually in menu 7.7.
TIP
See the section "Control – Introduction" for a more
detailed introduction to the installation's control
system (operation, menus, etc.).
If the building is cooled when S1156 starts, the compressor
may not be able to meet the entire demand without having
to use additional heating.
Commissioning
The first time the installation is started a start guide is star-
ted. The start guide instructions state what needs to carried
out at the first start together with a run through of the in-
stallation’s basic settings.
The start guide ensures that the start-up is carried out cor-
rectly and, for this reason, cannot be skipped.
Caution
As long as the start guide is active, no function in
the installation will start automatically.
31Chapter 6 | Commissioning and adjustingNIBE S1156
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