Hitachi YUTAKI M RASM-3WF2E Installation And Operation Manual page 36

The following table shows the minimum water volume needed in each unit.

NOTE
• The values shown on the table are based on theoretical installation conditions. In addition
YUTAKI units admits several hydraulic circuits configurations, and the value can be different
depending on each specific installation.
• Therefore, it rests with the client to recalculate these values depending on the real conditions of
the installation.
5.5 Water piping
5.5.1 Water piping length
Consider the following guidelines when designing the water circuit.
Maximum water piping length between indoor unit and DHW tank
Maximum water piping length between 3-way valve and DHW tank
Maximum total piping combination

NOTE
DHW piping length. It is recommended to avoid long runs of piping between the domestic hot
water tank and hot water outlet side in order to avoid heat losses.
PMEN0657 rev.0 - 02/2024
Water temperature drop
9 °F (5 °C)
18 °F (10 °C)
27 °F (15 °C)
36 °F (20 °C)
45 °F (25 °C)
54 °F (30 °C)
Item
3 RT 4 RT
Volume gal (L)
92 (350) 109 (414)
46 (175) 54 (207)
30 (117) 36 (138)
23 (88) 27 (104)
18 (70) 21 (83)
15 (58) 18 (69)
YUTAKI M R32
32.8 ft (10 m)
32.8 ft (10 m)
32.8 ft (10 m)
5
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