lected in menu 4.1.5 after the function is activated).
Activate the function by connecting potential-free
switch functions to two inputs selected in menu 5.4
(SG Ready A and SG Ready B).
Closed or open switch means one of the following:
– Blocking (A: Closed, B: Open)
“SG Ready” is active. The compressor in the heat
pump and additional heat is blocked.
– Normal mode (A: Open, B: Open)
"SG Ready" is not active. No effect on the system.
– Low price mode (A: Open, B: Closed)
"SG Ready" is active. The system focuses on costs
savings and can for example exploit a low tariff from
the electricity supplier or over-capacity from any own
power source (effect on the system can be adjusted
in the menu 4.1.5).
– Overcapacity mode (A: Closed, B: Closed)
"SG Ready" is active. The system is permitted to run
at full capacity at over capacity (very low price) with
the electricity supplier (effect on the system is set-
table in menu 4.1.5).
(A = SG Ready A and B = SG Ready B )
• +Adjust
Using +Adjust, the installation communicates with
the underfloor heating’s control centre* and adjusts
the heating curve and calculated supply temperature
according to the underfloor heating system’s recon-
nection.
Activate the climate system you want +Adjust to affect
by highlighting the function and pressing the OK but-
ton.
*Support for +Adjust required
Caution
This accessory may require a software up-
date in your VVM 500. The version can be
checked in the “Service info” menu 3.1.
Visit nibeuplink.com and click on the “Soft-
ware” tab to download the latest software
to your installation.
Caution
In systems with both underfloor heating and
radiators, NIBE ECS 40/41 should be used
for optimum operation.
External blocking of functions
An external switch function can be connected to
VVM 500 for blocking various functions. The switch
must be potential-free and a closed switch results in
blocking.
NOTE
Blocking entails a risk of freezing.
Functions that can be blocked:
• hot water (hot water production). Any hot water circu-
lation (HWC) remains in operation.
• heating (blocking of heating demand)
• cooling (blocking cooling requirement)
• internally controlled additional heat
• compressor in heat pump EB101
• tariff blocking (additional heat, compressor, heating,
cooling and hot water are disconnected)
Possible selections for AUX output
Caution
The relay outputs may be subjected to a max
load of 2 A at resistive load (230V AC).
TIP
The AXC accessory is required if more than
one function is to be connected to the AUX
output.
Indications
• alarm
• common alarm
• cooling mode indication (only applies if there are
cooling accessories)
• holiday
• away mode for "smart home" (complement to the
functions in menu 4.1.7)
Control
• circulation pump for hot water circulation
• active cooling in a 4-pipe system
• external heating medium pump
• additional heat in charge circuit
NOTE
The relevant distribution box must be marked
with a warning about external voltage.
NIBE VVM 500Chapter 5 | Electrical connections30
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