Daikin Altherma 3 H MT ECH2O, Installation Manual

5 Piping installation

Installation manual

13

ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH

₂

O

4P663479-1 – 2021.07

NOTICE

▪ The  required  concentration  might  differ  depending  on

the type of glycol. ALWAYS compare the requirements
from the table above with the specifications provided by
the  glycol  manufacturer.  If  necessary,  meet  the
requirements set by the glycol manufacturer.

▪ The  added  concentration  of  glycol  should  NEVER

exceed 35%.

▪ If the liquid in the system is frozen, the pump will NOT

be  able  to  start.  Mind  that  if  you  only  prevent  the
system from bursting, the liquid inside might still freeze.

▪ When  water  is  at  standstill  inside  the  system,  the

system is very likely to freeze and get damaged.

Glycol setting

NOTICE

If  glycol  is  present  in  the  system,  setting  [E-0D]  must  be
set to 1. If the glycol setting is NOT set correctly, the liquid
inside the piping can freeze.

Freeze protection by freeze protection valves

About freeze protection valves

When no glycol is added to the water, you can use freeze protection
valves to drain the water from the system before it can freeze.

▪ Install freeze protection valves (field supply) at all lowest points of

the field piping.

▪ Normally closed valves (located indoors near the piping entry/exit

points)  can  prevent  that  all  water  from  indoor  piping  is  drained
when the freeze protection valves open.

NOTICE

When  freeze  protection  valves  are  installed,  set  the
minimum cooling setpoint (default=7°C) at least 2°C higher
than  the  maximum  opening  temperature  of  the  freeze
protection  valve.  If  lower,  freeze  protection  valves  can
open during cooling operation.

For more information, see the installer reference guide.

5.2.5

To fill the heat exchanger inside the
storage tank

Following  heat  exchanger  have  to  be  filled  with  water  before  the
storage tank can be filled:

▪ The domestic hot water heat exchanger

NOTICE

To  fill  the  domestic  hot  water  heat  exchanger,  use  a  field
supply filling kit. Make sure you comply with the applicable
legislation.

1

Open the shut-off valve for the cold water supply.

2

Open  all  hot  water  taps  in  the  system  to  make  sure  that  the
tapped water flow is as high as possible.

3

Keep the hot water taps open and the cold water supply running
until no more air is vented from the taps.

4

Check for water leaks.

▪ The bivalent heat exchanger (only for some models)

5

Fill  the  bivalent  heat  exchanger  with  water  by  connecting  the
bivalent  heating  circuit.  If  the  bivalent  heating  circuit  will  be
installed on a later stage, fill the bivalent heat exchanger with a
filling hose until water comes out of both connections.

6

Do air purge on the bivalent heating circuit.

7

Check for water leaks.

5.2.6

To fill the storage tank

NOTICE

Before the storage tank can be filled, the heat exchangers
inside  the  storage  tank  have  to  be  filled,  see  previous
chapters.

Fill  the  storage  tank  with  a  water  pressure  <6  bar  and  a
flow speed <15 l/min.

Without installed drainback solar kit (option)

1

Connect  a  hose  with  non-return  valve  (1/2")  to  the  drainback
connection.

2

Fill  the  storage  tank  until  water  spills  from  the  spillover
connection.

3

Remove the hose.

b

a

a

c

b

a

Drainback connection

b

Spillover connection

c

Hose with non-return valve (1/2")