Heat Pump Operation - Viessmann PLC VITOCAL 350-HT PRO Operating Instructions For The System User

Programming unit

Heat pump operation

To call up the "Heat pump" page, tap on the following
buttons:
■ "Menu"
■ "Heat pump"
Fig. 10
For compressor 1, 2 and 3, see the following chap-
ter
White Switched OFF
Green Switched ON
Red Fault
"Low press." evaporation temperature, calculated
A
from pressure
Inlet temperature, evaporator
B
Outlet temperature, evaporator
C
Electronic expansion valve (EEV) with degree of
D
opening
3-way valve, compressor superheating, with
E
degree of opening
Room temperature
F
(cont.)
Casing temperature
G
"High press." condensing temperature, calculated
H
from pressure
Inlet temperature, condenser
J
Hot gas temperature
K
Outlet temperature, condenser
L
Oil pressure differential
M
Suction gas temperature downstream of IHE
N
Compressor superheating downstream of IHE
O
Internal heat exchanger (IHE)
P
Evaporation superheating
R
Suction gas temperature downstream of evapora-
S
tor
Operation
17