Easy Installation - Hitachi YUTAKI S80 Manual

Smart cascade: Hitachi's intelligent adjustment
« SMART CASCADE » Hitachi is a unique
and intelligent concept which optimises
heat pump efficiency. Depending on a
number of parameters, the controller decides whether
one or both compressors should operate. This translates
into considerable energy savings.
Exclusive adjustment system
YUTAKI S80 has an "intelligent" control able to adapt its
operation (with R410A refrigerant cycle or using the second
R134A refrigerant stage) by using an algorithm that takes
into account: the outdoor temperature condition (heating
and/or domestic hot water), performance optimisation and
defrosting cycles.
High yearly performance
During less cold periods (e.g. mid-season) or when heating
requirements are lower, Yutaki-S 80 adapts its operation to
optimise its performance.
The second refrigerant stage is thus by-passed, and hot water
production is thus assured through the first refrigerant stage,
avoiding useless simultaneous operation of two compressors
to the advantage of better seasonal energy efficiency.
During very cold periods (e.g. in the middle of winter) or
when heating requirements are high, Yutaki-S 80 adapts its
operation to optimise its performance.
The By-pass of the first stage is then closed and the second
refrigerant stage is activated, thus satisfying the requirement
for high temperature hot water production.

Easy installation

YUTAKI S80 has standard dimensions (l x D: 595 x 695 mm) to easily integrate
in all types of homes. When it is installed underneath the DHW module, YUTAKI
S80 is in any case shorter than 2 m (mod. 195L). Plumbing connections with
standard supplied flexible hoses, designed to reduce and aid the installer's
workload.
1 2
1
Hydraulic Module (Heating Only).
2
Hydraulic Module (Heating + DHW on top).
Domestic Heating
3 4
3
Hydraulic Module (Heating + DHW next to it).
4
Hydraulic Module (Heating + DHW standard).
EVI
R 4 1 0 A
Air
"SMART CASCADE" basic diagram
7°
SCOP
A+
ON
Operation with mild outside temperature!
-7°
SCOP
A+
ON
Operation with verylowoutside temperature!
Water
R 1 3 4 A
35°
OFF
65°
ON
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