Opening/Closing The Stop Valve; Cautions On Handling The Stem Cap; Cautions On Handling The Service Port; Tightening Torques - Daikin altherma ERHQ011BAV3 Installation Manual

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When it is expected that the operating pressure will be low (for
example, when cooling will be performed while the outside air
temperature is low), sufficiently seal the flare nut in the stop
valve on the gas line with silicon sealant to prevent freezing.

Opening/closing the stop valve

Opening the stop valve
1. Remove the valve cover.
2. Insert a hexagon wrench (liquid side: 4 mm/gas side: 6 mm) into
the valve stem and turn the valve stem counterclockwise.
3. When the valve stem cannot be turned any further, stop turning.
The valve is now open.
Closing the stop valve
1. Remove the valve cover.
2. Insert a hexagon wrench (liquid side: 4 mm/gas side: 6 mm) into
the valve stem and turn the valve stem clockwise.
3. When the valve stem cannot be turned any further, stop turning.
The valve is now closed.
Closing direction
Liquid side

Cautions on handling the stem cap

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

Cautions on handling the service port

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

9.4. Tightening torques

Item
Stem cap, liquid side
Stem cap, gas side
Service port cap
ERHQ011~016BAV3+W1 + ERLQ011~016CAV3+W1
Outdoor unit for air to water heat pump
4PW57794-1C – 2013.04
Silicon sealant
(Make sure there is no gap)
Gas side
Tightening torque (N•m)
13.5~16.5
22.5~27.5
11.5~13.9
10. R
EFRIGERANT PIPING
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Field pipes can be installed in four directions (A, B, C, D).
1 2 3
4 4
Figure - Field pipes in 4 directions
1 Drill
2 Centre area around knock-out hole
3 Knock-out hole
4 Slit
5 Connecting pipe
6 Bottom frame
7 Front plate
8 Pipe outlet plate
9 Screw front plate
10 Pipe outlet plate screw
A Forward
B Backward
C Sideways
D Downward
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Cutting out the two slits makes it possible to install as shown in
the figure "Field pipes in 4
(Use a metal saw to cut out the slits.)
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To install the connecting pipe to the unit in a downward direction,
make a knock-out hole by penetrating the centre area around
the knock-out hole using a Ø6 mm drill (4x). (See
pipes in 4 directions".)
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After knocking out the knock-out hole, it is recommended to
apply repair paint to the edge and the surrounding end surfaces
to prevent rusting.
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When passing electrical wiring through the knock-out holes,
remove any burrs from the knock-out holes and wrap the wiring
with protective tape to prevent damage.
1 2
1 Knock-out hole
2 Burr
3 Packing materials

10.1. Preventing foreign objects from entering

Plug the pipe through-holes with putty or insulating material
(procured locally) to stop up all gaps, as shown in the figure.
1 Putty or insulating material
(produced locally)
If there is any possibility that small animals enter the system through
the knock-out holes, plug the holes with packing materials (field
supplied).
Insects or small animals entering the outdoor unit may cause a short
circuit in the electrical box.
In cold climates, seal knock-out holes to avoid enterance of snow and
humidity.
9
10
5 6
A
D
directions".
figure "Field
3
Installation manual
7
B
8
C
1
14