Toshiba HWS-G2601ENXR-E - D27 SG Ready

Domestic Hot Water Heat Pump Service Manual
30
7.11.03 B9 Cooling / B10 Cooling T
The cooling function activates a three-way damper, which directs the cold exhaust air to a room
with cooling requirements. The two functions operate the damper in opposite directions.
The Cooling function allows an area to be cooled up by the DHW-HP exhaust air, activating a
damper motor controlled by the extra relay (GP1).
The setup of the cooling function is carried out using the function menu B9 (Cooling) & B8
(Cooling T) and installer menu D28 m(Cooling type)
Code
Set point
name
Description
Range
Factory
setting
B9
Cooling
The Cooling function can be activated. See installer menu D28 (Cooling
type).
OFF/ON
OFF
B10
Cooling T
The air temperature set point (°C) below which the heat pump stops,
when the unit is in the Cooling function.
10 - 30
21
D28
Cooling 1
The fan and heat pump run until the additional temperature sensor, BT5,
placed in the room environment is below a certain level. The water
temperature can only reach the maximum temperature allowed in the tank
D33 (T HP max). The cooling function activates a three-way damper, which
directs the cold exhaust air to a room with cooling requirements. The two
functions operate the damper in opposite directions
Cooling1 /
Cooling2
Cooling1
Cooling 2
Cooling 1 (2). If BT5 is higher than B10 T Cooling, the extra relay that
operates the damper (GP1) switches ON (OFF).
If BT5 is lower than B10 (T Cooling), the extra relay that operate the
damper (GP1) switches OFF (ON).
The following schematic shows the electrical connections for the cooling operation
BLU
B (D-)
L
N
L
N
0V
0V
L
L
0V
0~10V Input
BT3
EB1
0V
0V
0V
FM
BT2
BT1
0V
0V
L
N
PE
230VAC ~ 50Hz
0V
A (D+)
0V BLU
0~10V PWM
YEL
High pressure switch.
Compressor STOP when
Pd ≥ 2.0MPa
Solenoid valve.
Solenoid ON for 2 min
before compressor
starts and during
system defrost
BRN
BLK
N
BLU
BLK
BRN
BRN
BLU
BT5
Under floor
heating
or
Cooling
Room
temperature
BT4