Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 121

ELECTRICAL AND CONTROL SETTINGS
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DHW boost (Default for input 6)
This function allows a request for a one-time heating up of the domestic hot water temperature. The input can be sent by a push
button, a NC contact and a NO contact. This input is switched on terminals 16 and 20 of the TB2.
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Power Meter (Default for input 7)
This function is used to monitor real consumption of the system by means an external power meter device connected at this input.
The calculation method is done by measuring real consumption of the whole installation with one power meter device or 2 separate
power meter (one for indoor unit and another one for outdoor unit.
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Aquastat for circuit 1
Aquastat is a security accessory to control in order to prevent high water temperature entering into floor system (Circuit 1). This
devices must be connected to terminals 22 & 23 for circuit 1.
When this devices is activated because of the high temperature of the water, it stops the water pump in order to stop the flow of
water to the heating floor.
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N O T E
For R410A models terminals 28 & 29 for circuit 2 are available.
107 PMML0575 rev.2 - 03/2022
16
Common
Line
16
Common
Line
22
C
20
DHW Boost
input 6
21
Power M.
23
1
Second Aquastat
Circuit 1 (for WP)
input 7