System Description - Hitachi WEH-6E Installation And Operation Manual

SYSTEM DESCRIPTION

1 SYSTEM DESCRIPTION
Water Electric Heater
Position-separating hyphen (fixed)
Heater power (kW)
WEH -
1.1 "MONO-ENERGY" SYSTEMS
The YUTAKI system is designed to provide around 60% of the
heating capacity for the coldest day of the year, and to provide
90-95% of the capacity required throughout the entire heating
season. An auxiliary electrical resistance will be responsible for
providing the rest of the caloric energy on the coldest days.
This is one of the most common systems since it gives the right
balance between operating and investment costs.
It is usually used for new systems or when traditional boilers are
replaced.
?
N O T E
• (A) Excess capacity on the YUTAKI M or S80 unit
• (B) Capacity covered by the YUTAKI M or S80 unit
• (C) Capacity covered by the electric heater
Example for YUTAKI M:
1 PMML0199A rev.4 - 12/2016
Made in Europe
6 E
PART I - OPERATION
Single-energy system
(YUTAKI Unit + electric heater)
Coldest day of the year
Point of
10%
equilibrium Capacity of
(C)
YUTAKI unit
(A)
Heating load
90% demanded:
(B)
Hours