Filling The System (Primary Circuit) - Mitsubishi Electric ecodan ERSE series Installationshandbuch

4
Installation
Drain Pipework (ONLY ERSE series)
The drain pipe should be installed to drain condensing water in Cooling mode.
To prevent dirty water from draining directly onto the floor next to hydrobox, please
connect appropriate discharge pipework from the hydrobox.
• Securely install the drain pipe to prevent leakage from the connection.
• Securely insulate the drain pipe to prevent water dripping from the locally supplied
drain pipe.
• Install the drain pipe at a down slope of 1/100 or more.
• Do not place the drain pipe in drain channel where sulfuric gas exists.
• After installation, check that the drain pipe drains water properly from the outlet of
the pipe to suitable discharge location.
<Installation>
1. Apply polyvinyl chloride type adhesive over the shaded surfaces inside of the
drain pipe and on the exterior of the drain socket as shown.
2. Insert the drain socket deeply into the drain pipe <Figure 4.3.2>.
Note: Securely support the locally supplied drain pipe using pipe support to
avoid the drain pipe falling from the drain socket.
<Checking Drainage>
• Check that the drain pipe drains water properly from the outlet of the pipe.
• Check for any leakage from the connections.
Note: Always check drainage at installation regardless of season.
• Remove the front panel and gradually pour 1 liter of water into the drain pan
<Figure 4.3.3>.
Note: Pour water slowly into the drain pan so that water does not overflow
from the drain pan.

Filling the System (Primary Circuit)

1. Check all connections including factory fitted ones are tight.
2. Check the pump valve and the strainer valve are opened completely.
3. Insulate pipework between hydrobox and outdoor unit.
4. Thoroughly clean and flush, system of all debris. (see section 4.2 for instruction.)
5. Fill hydrobox with potable water. Fill primary heating circuit with water and
suitable anti-freeze and inhibitor as necessary. Always use a filling loop with
double check valve when filling the primary circuit to avoid back flow
contamination of water supply.
• Anti-freeze should always be used for packaged model systems (see
section 4.2 for instruction). It is the responsibility of the installer to decide
if anti-freeze solution should be used in split model systems depending
on each site's conditions. Corrosion inhibitor should be used in both split
model and packaged model systems.
Figure 4.3.4 shows freezing temperature against anti-freeze concentration.
This figure is an example for FERNOX ALPHI-11. For other anti-freeze,
please refer to relevant manual.
• When connecting metal pipes of different materials insulate the joints to
prevent a corrosive reaction taking place which will damage the pipework.
6. Check for leakages. If leakage is found, retighten the screws onto the
connections.
7. Pressurise system to 1 bar.
8. Release all trapped air using air vents during and following heating period.
9. Top up with water as necessary. (If pressure is below 1 bar)
13
Drain socket
Apply polyvinyl chloride
type adhesive
Locally supplied
drain pipe
(VP-20)
Do not pour water into these openings.
<Figure 4.3.3>
5
0
-5
-10
-15
-20
-25
0
<Figure 4.3.2>
10 20 30 40
Anti-freeze concentration [%]
<Figure 4.3.4>
50