To Connect The Drain Hose To The Drain; Connecting The Refrigerant Piping; About Connecting The Refrigerant Piping; Precautions When Connecting The Refrigerant Piping - Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual

4 Optional: If you want to fix the unit to the wall from inside the
unit:
▪ Remove the upper front panel, and open the switch box. See
"7.2.3 To open the indoor
▪ Fix the unit to the wall with an Ø8 mm screw.
7.4.4

To connect the drain hose to the drain

Water coming from the pressure relief valve is collected in the drain
pan. You must connect the drain pan to an appropriate drain
according to the applicable legislation.
1 Connect a drain tube (field supply) to the drain pan connector
as follows:
a
a Drain pan connector
It is recommended to use a tundish to collect the water.
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
unit" [ 4 30].
7.5

Connecting the refrigerant piping

7.5.1

About connecting the refrigerant piping

Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the refrigerant piping to the indoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
7.5.2 Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this R32 unit to guarantee its
lifetime. The drying material may dissolve and damage
the system.
NOTICE
Take the following precautions on refrigerant piping into
account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
▪ Only use R32 when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R32 installations to withstand
the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
▪ Install the piping so that the flare is NOT subjected to
mechanical stress.
▪ Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
▪ Use caution when passing copper tubes through walls
(see figure below).
7 Installation
Installer reference guide
35