Cautions For Handling The Stop Valve Cover; Cautions For Handling The Service Port; Tightening Torques; Piping Connection Work - Daikin Altherma ERLQ018BAVJU Manuel D'installation

Cautions for handling the stop valve cover

The stop valve cover is sealed where indicated by the arrow.
Take care not to damage it.
After handling the stop valve, make
sure to tighten the stop valve cover
securely. For the tightening torque,
refer to the table below.
Check for refrigerant leaks after
tightening the stop valve cover.

Cautions for handling the service port

Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
Check for refrigerant leaks after tightening the service port
cover.

Tightening torques

Item
Stop valve cover, liquid side
Stop valve cover, gas side
Service port cover
10. P
IPING CONNECTION WORK
WARNING
During installation, attach the refrigerant piping securely
before running the compressor.
If the compressor is not attached and the stop valve is
open during pump-down, air will be sucked in when the
compressor is running, causing abnormal pressure in the
freezer cycle which will lead to breakage and even to
injury.
CAUTION
Do never install a drier to this R410A unit in order to
guarantee its lifetime. The drying material may dissolve
and damage the system.
NOTE 1. Installation shall be done by an installer, the
choice of materials and installation shall comply
with the applicable legislation.
2. To persons in charge of piping work:
Be sure to open the stop valve after piping
installing and vacuming is complete. Running
the system with the valve closed may break
the compressor.
When the refrigerant system is to be opened,
refrigerant must be treated according the
applicable legislation.
Ensure that the field piping and connections
are not subjected to stress.
Installation manual
9
Tightening torque
15.93~29.21 lbs•ft (21.6~27.4 N•m)
32.53~39.75 lbs•ft (44.1~53.9 N•m)
7.97~10.84 lbs•ft (10.8~14.7 N•m)

10.1. Preventing foreign objects from entering

Plug the pipe through-holes with putty or insulating material
(field supply) to stop up all gaps, as shown in the figure.
1
Insects or small animals entering the outdoor unit may cause a
short circuit in the electrical box.

10.2. Leak test and vacuum drying

DANGER: ELECTRICAL SHOCK
See "4. General safety precautions" on page 3.
When all piping work is complete, it is necessary to:
check for any leakages in the refrigerant piping and
to perform vacuum drying to remove all moisture in the
refrigerant piping.
If there is a possibility of moisture being present in the refrigerant
piping (for example, rainwater may have entered the piping), first
carry out the vacuum drying procedure below until all moisture has
been removed.

General guidelines

All piping inside the unit has been factory tested for leaks.
Use a 2-stage vacuum pump with a non-return valve which can
evacuate to a gauge pressure of –14.6 psi [–100.7 kPa
(5 Torr absolute, –755 mm Hg)].
NOTE Do not purge the air with refrigerants. Use a
vacuum pump to evacuate the installation. No
additional refrigerant is provided for air purging.
Make sure that the gas stop valve and liquid stop
valve are firmly closed before performing the leak
test or vacuum drying.

Setup

1 4 8
2
3
10
5
6
7 8 9
1 Putty or insulating material
(field supply)
1 Pressure meter
2 Gauge manifold
3 Low-pressure valve (Lo)
4 High-pressure valve (Hi)
5 Charging hoses
6 Vacuum pump
7 Service port
8 Stop valve cover
9 Gas stop valve
10 Liquid stop valve
ERLQ018~030BAVJU
Outdoor unit for air to water heat pump
4PW62590-1 – 07.2010