85
D
Electronic expansion valve
E
4-way diverter valve
F
Secondary circuit flow temperature sensor
upstream of instantaneous heating water heater
(T1)
G
Low pressure sensor
H
Secondary circuit air vent valve
K
Evaporator suction gas temperature sensor (T7)
L
Reversible suction gas temperature sensor (T3)
M
Condenser
N
Schrader valve, low pressure side
O
Hot gas temperature sensor (T6)
P
Compressor suction gas temperature sensor (T4)
R
Schrader valve, high pressure side
S
Compressor
T
Refrigerant receiver
U
Safety high pressure switch
V
High pressure sensor
W
Schrader valve, high pressure side
X
Refrigerant circuit controller temperature sensor
(T2)
Draining secondary side heat pump
1.
Close the on-site boiler drain & fill valve.
2.
Drain the heat pump at the drain & fill valve in the
secondary circuit: See chapter "Indoor unit: Over-
view of internal components".
Checking the temperature sensors
Connection to the indoor unit
Temperature sensors are connected to the controller
and sensor PCB: See page 44.
Temperature sensor
Test element
■
Outside temperature sensor (F0)
■
Buffer temperature sensor (F4)
■
Cylinder temperature sensors top (F6) and bottom (F7)
■
System flow temperature sensor (F13)
■
Cooling circuit flow temperature sensor (direct heating circuit A1/HC1 or separate cool-
ing circuit SKK) (F14)
■
Boiler water temperature sensor, external heat generator (F20)
■
For heat pump cascades: Buffer outlet temperature sensor (F23)
■
Room temperature sensors
NTC 10 k
Ω
■
For heat pump cascades: Swimming pool flow temperature sensor (F21)
NTC 20 k
Ω
■
Flow temperature sensor for secondary circuit (F8)
■
Secondary circuit return temperature sensor (F9)
Pt500A
(PTC)
Connection to the outdoor unit
Temperature sensors are connected to the refrigerant
circuit controller in the outdoor unit (see label in the
outdoor unit): See page 83.
Temperature sensor
Test element
■
Refrigerant circuit controller temperature sensor (T2)
■
Compressor suction gas temperature sensor (T4)
■
Air intake temperature sensor (T5)
■
Hot gas temperature sensor (T6)
■
Evaporator suction gas temperature sensor (T7)
■
Secondary circuit flow temperature sensor (T1)
■
Reversible suction gas temperature sensor (T3)
NTC 10 k
Ω
Maintenance
Outdoor unit: Overview of internal components
(cont.)
6150148
Maintenance
