Defrosting; Legionella; Legionella Function; Safety - SWISSTHERM VT167 OHE Bedienungs Und Installationsanleitung Handbuch

DEFROSTING

DEFROSTING:
"Defrost Gas" – Defrosting with hot gas. Only VT167OHE / VT167 E
3. "Defrosting gas"
Only for models VT167OHE / VT167 E
If the temperature at the evaporator < -2°C, the defrosting by hot gas will begin. This means that the bypass valve opens,
the compressor will run and the fan is switched off.
If the evaporator reaches +5°C, the single solenoid valve closes, and the fan starts. If the temperature for the evaporator
does not reaches +5°C within 20 minutes, the defrosting will stop and the normal operation is continued. If the evaporator
temperature reaches -18°C or below that, the heat pump will stop. The additional heating "HP+EL" or "HP+BOIL" will
continue, if chosen, to the setting of "T-min".
For the defrosting function, it applies that that the interval between the defrosting periods is 2 hours. This means that 2
hours after beginning of the last defrosting of the heat pump will make no defrosting, although the temperature is at the
evaporator under -2°C.

LEGIONELLA

LEGIONELLA FUNCTION:

The function is to be activated in the menu.
If the legionella function is activated, the
legionella sequence will start immediately.
If the legionella function is deactivated, the
legionella sequence will stop immediately.
After 7 days (168 hours) starts a new legionella
sequence, if it is not deactivated. The function will be
deactivated at power lost.
The water temperature goes up to 62°C with the heat pump and the additional heating system. Hereafter it runs on
additional heating alone up to 65°C. This temperature is held 1 hour before it will switch back to normal mode.
There is 12 hours timeout on the legionella function. If the legionella temperature is not reached*, the alarm will be
showed in the display menu. The alarm will on the next successful legionella sequence be reset or on user receipt.
* Air temperature is too low and/or the water requirement is higher than the effect of the heat pump into the time of the
legionella function.

SAFETY

SAFETY VALVE, CONTRA VALVE, CONDENSATION DRAIN – The installer:
The heat pump must be fitted with the contra valve and safety valve on the cold water line. This is to ensure that hot water
tank is not exposed to high pressure and thus may be leaking. Safety valve overflow connects to the floor drain. The
contra valve in the security group prevents the intrusion of warm water into cold water network. Depending on the input
air humidity would give the evaporator condensation water. Establish a drain. With regard to the specification of pipe
connections - please see dimensional sketch "page 6 – Construction of..."
L e g io n e ll a p re v e n t io n
7 0
6 0
5 0
4 0
3 0
2 0
1 0
0
1 4 7 1 0 1 3 1 6 1 9
T i m e
W a t e r t e m p e r a t u r e
N o r m a l s e t p u n k t
A d d i t i o n a l h e a t i n g
2 2 2 5 2 8 3 1 3 4 3 7 4 0
L e g i o n e l l a s e t p u n k t
H e a t p u m p
4 3 4 6 4 9 5 2 5 5
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