20
Water pipe installation
1. You do not need to equip extra expansion tank when there's open type expansion tank on top part of the existing
thermal storage tank. However, if you do not have expansion tank, you will need to construct closed type pipe system
and equip expansion tank.
2. Water pipe installation system
1) Install the water pipe as shown in the below illustration. All the parts, other than DVM Hydro unit / Hydro unit HT,
must follow on site installation specification.
<Water pipe connection part>
DVM Hydro unit / Hydro unit HT
Water
pipe
Insulator
O
ver 80 mm
Finishing tape
f
Installing hot water supply
①
⑥
②
⑭
⑪
⑧
⑩
⑦
⑫
③
⑨
⑬
On site
installation
Ball valve (Used as
cleaning hole)
Water out
Water in
Hot water tank
Cleaning device
Hydro unit
Heat
exchanger
on water
side
④
⑤
①
Water pipe joint (union, flange)
⑤
Flexible joint
⑨
Expansion tank
②
Thermometer
⑥
Drain (within the product)
⑩
Temperature sensor for hot water tank
③
Manometer
⑦
Pump
⑪
Drain valve
④
Ball valve
⑧
Air vent
⑫
Strainer
⑬
Water Valve
⑭
Pressure relief valve (Pressure safety valve)
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