Viessmann BW 351.A07, Инструкции по установке и обслуживанию для подрядчиков

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91
Heating flow
Flow, DHW cylinder
Return, secondary circuit (heat-
ing return and DHW cylinder re-
turn)
+
Primary circuit return (heat
pump brine outlet)
Flow, primary circuit (heat
pump brine inlet)
A Condenser
B Evaporator
C Flow temperature sensor, primary
circuit (heat pump brine inlet)
D Low pressure Schrader valve
E High pressure Schrader valve
F Instantaneous heating water heater
(accessories)
G Primary pump (accessory for
type BW 351.A07)
I Electronic expansion valve EEV
J Compressor
K Flow temperature sensor, secon-
dary circuit
L Secondary circuit return tempera-
ture sensor
M Drain valve on the secondary side
N
Circulation pump for cylinder heat-
ing (accessory for
type BW 351.A07, installation out-
side the heat pump) with check
valve
O Secondary pump (accessory for
type BW 351.A07, installation out-
side the heat pump) with check
valve
P Air vent valve, secondary side
Q
Low pressure sensor EEV
R Suction gas temperature sensor
S
Safety high pressure switch
T High pressure sensor EEV
U
Filter dryer
V Primary circuit return temperature
sensor (heat pump brine outlet)
W Drain valve, primary side
X
Hot gas temperature sensor
y Liquid gas sensor
Draining the heat pump on the primary/secondary side
1. Shut off the connection to the heating
network. 2. Drain heat pump at drain valve on pri-
mary/secondary side (see page 89).
Checking the sensors
Sensor connections to the controller and
sensor PCB: See page 36. Sensor locations in the heat pump: See
diagram on page 89.
Troubleshooting
Repairs
(cont.)
5546 273 GB
Service