Guidelines For FLare Connection; Guidelines For Handling Stop Valve - Rotex RRRQ011AAV1 Manual De Instalación

■
Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.
■
Do not use flux when brazing copper-to-copper refrigerant
piping. Use phosphor copper brazing filler alloy (BCuP) which
does not require flux.
■
Flux has an extremely harmful influence on refrigerant piping
systems. For instance, if chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
deteriorate the refrigerant oil.
6.2. Guidelines for flare connection
■
Flares should not be re-used. New ones should be made in
order to prevent leaks.
■
Use a pipe cutter and flare tool suitable for the refrigerant used.
■
Only use the annealed flare nuts included with the unit. Using
different flare nuts may cause the refrigerant to leak.
■
Please refer to the table for flaring dimensions and tightening
torques (too much tightening will result in splitting the flare).
Piping size Tightening
(mm) torque (N•m)
Ø9.5 33~39
Ø15.9 63~75
■
When connecting the flare nut, coat the flare inner surface with
ether oil or ester oil and initially tighten 3 or 4 turns by hand
before tightening firmly.
■
When loosening a flare nut, always use two wrenches together.
When connecting the piping, always use a spanner and torque
wrench together to tighten the flare nut to prevent flare nut
cracking and leaks.
1
4 2
2
3
1
4
3
Not recommended, but in case of emergency
Should you be forced to connect the piping without a torque
wrench, follow the following installation method:
■ Tighten the flare nut using a spanner until the tightening
torque suddenly increases.
■ From that position further tighten the flare nut the angle listed
below:
Piping size Further tightening
(mm) angle (degrees)
Ø9.5 60~90
Ø15.9 30~60
RRRQ011~016AAV1+Y1
Outdoor unit for air to water heat pump
4PW55782-1B
Flare dimensions A Flare shape
(mm) (mm)
90 ±2
12.8~13.2
A
R=0.4~0.8
19.4~19.7
Piping union
Spanner
Flare nut
Torque wrench
Recommended arm
length of spanner (mm)
±200
±300

6.3. Guidelines for handling stop valve

Cautions on handling the stop valve
■
Make sure to keep both stop valves open during operation.
■
The figure below shows the name of each part required in
handling the stop valve.
1
1
2
3
2
4
3
4
■
The stop valve is factory closed.
■
Do not apply excessive force to the stop valve. Doing so may
break the valve body.
Since the stop valve mounting plate may be deformed if only a
torque wrench is used to loosen or tighten the flare nut, always
make sure to secure the stop valve with a spanner, then loosen
or tighten the flare nut with a torque wrench.
Do not place the spanner on the stop valve cover, as this could
cause a refrigerant leak.
■
The operating pressure at the refrigerant side can be low (for
example, heating operation when outdoor 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 stop valve and turn the stop valve counterclockwise.
3. When the stop valve 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 stop valve and turn the stop valve clockwise.
3. When the stop valve cannot be turned any further, stop turning.
The valve is now closed.
Closing direction
Liquid side
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
1 Spanner
2 Torque wrench
1
2
Silicon sealing pad
(Make sure there is no gap)
Gas side
Installation manual
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