Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 353

MAINTENANCE
YUTAKI S80 Type 2
YUTAKI S80 has special configurations for the position of the manometer. While it is factory supplied in only one position (left side),
it can be moved by the installer to the right side or to the front of the unit. For example, in case of a wall at the left side or at both
sides of the YUTAKI S80 unit, respectively.
Manometer at Left side (factory supplied)
Manometer
?
N O T E
This is the factory supplied location of the
manometer
?
N O T E
The water pressure must remain above 1 bar in order to prevent air from entering the circuit, and below 3.0 bars (safety valve opening value).
- DHW (if used): Check there is no loss of pressure and ensure that DHW pressure is not higher than 6 bars. Connect a
gauge to the DHW drain port for this purpose.
10 Security water valve for DHW (if used):
• Operation: Check the correct operation of the security water valve (pressure and temperature relief valve) at the DHW inlet
connection. Remember that this element must ensure that the following functions are pro vided: Pressure protection, non-
return function, shut-off valve, filling and draining.
11 DHWTank inspection hatch
The DHW tank has an inspection hatch at the bottom. This hatch allows the inspection of the interior of the tank.
!
D A N G E R
Be careful when using this inspection hatch. There are high temperature and high pressure inside the tank. Before open it wait a
reasonable time for the water to cool.
For a safe operation using the inspection hatch, proceed as it is explained in the manual of the specific unit.
Additional hydraulic elements are necessary in the DHW circuit. Refer to chapter
339 PMML0575 rev.2 - 03/2022
Manometer at Front side
Manometer
?
N O T E
This configuration requires removing the front
panel, both for mounting and to display the
gauge.
Manometer at Right side
Manometer
?
N O T E
Installer can change the location of the manometer
gauge
"6 Refrigerant and water piping".