Viessmann Vitocal 350-A AWHI 351.A14, Инструкция по установке и обслуживанию

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Overview of sensors, drain and air vent valves
D
U
A
G
K
M
F
H
L
C
B
N
O
R
S
T
V
E
Fig. 70
A
Refrigerant receiver
B
Drain valve
C
Secondary circuit return temperature sensor
D
Thermostatic expansion valve
E
Temperature sensor EVI
F
Solenoid valve
G
Filter dryer
H Secondary circuit flow temperature sensor
K Schrader valve, high pressure side
L
Safety high pressure switch
M
Electronic expansion valve (EEV)
N
Manual air vent valve
O
4-way diverter valve
R
High pressure sensor
S Hot gas temperature sensor
T Schrader valve, low pressure side
U
Low pressure sensor
V
Suction gas temperature sensor
Draining the heat pump on the secondary side
1. Close the on-site BDF valve. 2. Drain the heat pump at the drain valve in the sec-
ondary circuit flow.
Checking the sensors
■ For sensor connections to the controller and sensor
PCB, see page 46.
■ For the position of the sensors in the heat pump, see
diagram on page.
Troubleshooting
Repairs
5692878
Maintenance