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3) Please design the tank with the following minimum volume:
Minimum tank volume = Quantity of heat pump unit X 4000L
4) Recommend to have PU foaming on the tank to insulate the tank well (standby temperature
decrease should be lower than 8 Celsius in 24 hours).
5) Please refer to picture 5.5a and 5.5b for the tank connection nozzles and accessories
requirement (assume the total tank internal height is "H"):
a) Install the temperature & pressure valve on top of the tank.
b) Install the pressure gauge, temperature meter on top of the tank.
c) Design the "D
d) Design the "F" connection (optional, static heaing element) at the height based on the
actual conditions.(the higher installation, the faster heating speed, the lower heating
volume).
e) Design the "A" connection (cold water supply) and "D
returned from rooms) as close to the bottom of the tank as possible.
f) Design the drain outlet connection at the lowest point of the tank.
g) Design the "B
connection (optional, hot water from auxillary heater), "C
heat pumps) and "C
of the tank as possible. Design the hot water connections as far as possible from cold
water connections to avoid the cold water mixing with hot water. For vertical tank,
the hot water connections could be designed slightly higher than the cold water
connections to avoild water mixing as shown in picture 5.5a.
h) Design the "E
tank. Design the "E
which meet both " at least 150mm higher than the 'B
least 'H
' higher from the bottom of the tank". "H
1
minimum tank volume (from the bottom of the tank) = Quantity of heat pump unit X
2000L. Two sensor tubes are requested for the temperature senors installation. The
sensor tube should have one end closed (inside of the tank), the internal diameter
should be 8mm and it should have a 200mm insertion length inside of the tank. The
outside connection of the sensor tube should be designed to have good water proof
capability, a G-1/2" female threaded connection is recommended as the outside
connection. Please paste the thermal paste on the tank temperature sensor head
during the installation.
i) Appropriate anode should be installed to protect the tank from corrosion.
1.13. Tank Installation
CAUTION:
* Please install the hot water tank as closely as possible to the heat pump units to reduce the
standby heat loss.
" connection (hot water to rooms) at the top of the tank.
1
" connection (optional, cold water to auxillary heater) and "B
1
" connection (hot water from heat pumps) as close to the bottom
2
" connection (tank temperature sensor installation) at the top of the
2
" connection (control temperature senor installation) at a location
1
" connection (cold water
2
" connction (cold water to
1
' and 'C
' connections" and "at
2
2
" should be determined to create a
1
"
2
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