Mitsubishi EHST20D-YM9C - Water System Diagrams

11
8
27
19
20
18
17
3
4
25
28
7
12
26
5
15
13
29
23
14
6
7
24
Pa
10
9
B
A
30
32
32
33
31
31
30
22
*1
16
Pa
11
10
8
27
19
9
16
20
B
A
30
*1
32
32
33
18
17
30
30
35
37
21
3
4
25
28
7
5
15
13
29
23
32
14
6
7
24
36
12
26
38
WATER SYSTEM DIAGRAM
8
•Refer to <Table 4-1 and 4-2> for the part names.
*1Refertothefollowingsection[Localsystem].
<E*ST20*-*M**C > (Split model system)
<EHST20*-MHCW>(UKSplitmodelsystem)<Example>
<Figure8-2>
<Figure8-1>
Notes:
•Toenabledrainingofthecylinderunit
an isolating valve should be posi-
tioned on both the inlet and outlet
pipework.
•Besuretoinstallastrainerontheinlet
pipeworktothecylinderunit.
•Suitabledrainpipeworkshouldbeat-
tached to all relief valves in accord-
ancewithyourcountry’sregulations.
•Abackowpreventiondevicemustbe
installed on the cold water supply
pipework(IEC61770)
• When using components made from
different metals or connecting pipes
made of different metals insulate the
joints to prevent any corrosive reac-
tion taking place which may damage
thepipework.
Flare connection
Flare connection
Cylinder unit
Cylinder unit
Drain
Drain
Drain
Drain
Drain
Drain
Coldwater
Coldwater
DHW
DHW
Local system
Refrigerantpipe
Water pipe
Local system
Flexiblehose
(Temporary connection)
Water
supply
Notes:
•
To enable drainingofthecylinderunit
anisolatingvalveshouldbepositioned
onboth the inlet and outlet pipework.
Novalveshouldbettedbetweenthe
expansionvalve(item35)andthecyl-
inder unit (safety matter).
•Besuretoinstallastrainerontheinlet
pipeworktothecylinderunit.
•Suitabledrainpipeworkshouldbeat-
tached to all relief valves in accord-
ancewithyourcountry’sregulations.
• When using components made from
different metals or connecting pipes
made of different metals insulate the
joints to prevent any corrosive reac-
tion taking place which may damage
anypipework.
•Fillingloop’sexiblehosemustbere-
movedfollowingthellingprocedure.
Item provided with unit as loose ac-
cessory.
•Installtheinletcontrolgroup(item35)
abovetheleveloftheT&Preliefvalve
(item21).Thiswillensure DHW tank
willnotrequiredrain-downtoservice/
maintaintheinletcontrolgroup.
Refrigerantpipe
Water pipe
OCH570C