B7 Floor / B8 Floor T - Toshiba HWS-G1901CNMR-E Service Manual

Domestic Hot Water Heat Pump

7.11.02 B7 Floor / B8 Floor T

The floor heating function activates an external circulation pump, controlled by the extra relay
(GP1)
The setup of the floor heating function is carried out using the function menu and B7 (Floor) & B8
(Floor T)
Set point
Code Description
name
If the temperature at the bottom of the tank BT4 (T water b) is higher than
the setting menu D25 (Floor T start) the floor heating function is activated.
B7 Floor
If the extra temperature BT5 (T Extra) is higher than the floor heating
temperature (B8 T floor) the circulation pump (Extra relay GP1) stops.
The desired floor heating temperature in °C with hysteresis of 1K.
B8 Floor T
30
29
23
22
21
12
The following schematic shows the electrical connections for the underfloor heating operation
230VAC ~ 50Hz
BRN
L
N
BLU
BLK
PUMP
ON
OFF
T4: Temperature Tank Bottom Control
T5: Floor Temperature
Based on following set conditions
Installer menu
D24: Floor Set Start = 30°C
D26: Extra Function = Floor
Function menu
B7: Floor = ON
B8: Floor Temp = 22°C
N
L
Solenoid valve.
Solenoid ON for 2 min
before compressor
starts and during
system defrost
High pressure switch.
Compressor STOP when
Pd ≥ 2.0MPa
29
Service Manual
Range
OFF/ON
15 - 40
(T4)
(T5)
BT1
BT2
BT5
Room Temperature
BT3
EB1
Factory
setting
OFF
35
FM
BT4