Case Of Dhw Only Use - Mitsubishi Electric ecodan EHPT20Q-VM2EA Installation Manual

7

Case of DHW only use

7-1. Pipework Connections
Expansion Vessel
Outlet to Heat pump unit
Inlet from Heat pump unit
E F D
Front Panel
<Pipework procedure>
1. Provide a branch on connecting pipe C & D and connect Filling Loop.
2. Install an Expansion Vessel on the branch piping between Cylinder unit and Filling Loop.
3. Connect other Pipes (A, B, E, F) as showing <Figure 7.1.1> and page 7- 8.
7-2. Electrical work
①②
<Electrical work>
1. Connect the power cable for the cylinder unit to TB1 (①).
2. Connect the outdoor unit – cylinder unit connecting cable to TB2 (②).
• No need to connect the power cable for the booster heater to ECB.
TB1
TB2
ECB
Not for use when DHW
only operation
<Figure 7.1.2>
38
Flexible hose
(Temporary connection)
Shower/Tap
Mains Water supply
C A B
A: DHW outlet connection
B: Cold water inlet connection
(Inlet from Mains water supply)
C: Space heating return connection
D: Space heating fl ow connection
E: Flow from heat pump connection
(No plate heat exchanger)
F: Return to heat pump connection
(No plate heat exchanger)
<Figure 7.1.1>
7
Case of DHW only use
7-3. Main controller setting (Deactivation of Heating operation)
When using DHW only operation, set the main controller settings according to the following procedure.
A
F1 F2 F3 F4 ①
E
B C D
<Figure 7.2.1>
A
Please make sure that
kept displayed in heating operation
status window.
F1 F2 F3 F4
E
B C D
③ ②
<Figure 7.2.2>
<Deactivation of Heating operation>
① Press the F4 button on "Home screen" (see Figure.7.2.1)
to proceed to "Option screen" (see Figure.7.2.2).
② T o deactivate heating operation, press "F3 button" several
times on "Option screen" (see Figure.7.2.2) until
displayed as Heating operation status.
③ Press C button, then return to the home screen.
mark is
mark is
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