Danfoss DSV 10 G Guia De Instalacion página 4

ENGLISH
Refrigerants
Applicable to R717, R744, HFC and HCFC
Temperature range
-50 °C – 100 °C (-58 °F – 212 °F)
Pressure range
The DSV 10 valve is designed for a max. working
pressure of 65 bar (944 psig).
Installation
The DSV change-over valve is installed together
with safety valves (SFA).
This installation guide must be complemented
with the installation guide for the speci c safety
valves to secure all details are covered.
Important:
The inlet/outlet pipe dimensions must not be
smaller than those of the welding nipples.
The valve is designed to withstand a high
internal pressure. However, the piping system
should be designed to avoid liquid traps and
reduce the risk of hydraulic pressure caused by
thermal expansion. It must be ensured that the
valve is protected from pressure transients like
"liquid hammer" in the system.
During welding avoid welding debris and
dirt in the threads of the connections and
in the adjacent pipes.
Before assembly clean all parts exposed
to debris and dirt.
DSV 10 G inlet connection with welding
nipple (see g. 1a)
1. Assemble the union nut and welding
nipple and place the assembly further
to the system piping
4 | AN32022465179401-000301
2. Fully weld the welding nipple to the
system piping and cool down the assembly
3. Place the alu-gasket inside the union nut
and install the DSV 10 by turning the
union nut counter-clockwise
4. Tighten to torque 110 Nm (81 ft lb)
DSV 10 G inlet connection with adapter
(see g. 1b)
1. Place alu-gasket (G) inside the union
nut with "RH" marking to the inlet
2. Connect the union nut with inlet
3. Turn clockwise and tighten to torque
110 Nm (81 ft lb)
4. Place the alu-gasket inside the other union
nut and connect to the system piping by
turning the union nut clockwise and tighten
su ciently
Important:
Counter-hold one union nut when turning
the other union nut to avoid unintentionally
loosening of the nut!
DSV 10 NPT inlet connection (see g. 1c)
1. Put su cient te on tape or similar sealing
material on the DSV 10 inlet
2. Mount the DSV 10 inlet by turning it clockwise
3. Align and tighten by applying a su cient
torque
Adapter/ blind cap installation (see g. 2)
1. Place alu-gaskets (G) on the A/B outlets
2. Connect SFA 10 adapters (G) to the outlets
A/B. For pressure testing set-up use blind
caps (G) or plugs (NPT) with su cient
te on seling to seal A and B
3. Turn counter-clockwise and tighten
su ciently. On G-version to torque
110 Nm (81 ft lb)
Important:
Assure a tight assembly by counter-holding
the nut at the DSV inlet when turning
adapters/SFAs at DSV outlet.
SFA 10 G (x2) installation (see g. 3a)
1. Place the alu-gasket inside the union nut,
add G4500 grease (148F3064) to thread a,
and install the SFA by turning the union
nut counter-clockwise
2. Tighten to torque 100 Nm (74 ft lb)
3. Prepare and assemble the outlet
connection as described in the
DSV 10 G inlet connection section
4. Add G4500 grease (148F3064) to thread b,
and tighten the outlet connection to
torque 100 Nm (74 ft lb)
Important:
Assure a tight assembly by counter-holding
the nut at the DSV inlet when turning
adapters/SFAs at DSV outlet.
SFA 10 NPT (x2) installation (see g. 3b)
1. Put su cient te on tape or similar sealing
material on the SFA 10 inlet and outlet
2. Mount the SFA 10 inlet by turning it clockwise
3. Align and tighten by applying a su cient
torque
4. Connect the SFA 10 outlet to the discharge
piping system
Operating Instructions (see g. 4)
When the spindle is turned fully clockwise to
mechanical stop, the DSV is opened to outlet B.
When the spindle is turned fully counter-
clockwise to mechanical stop the DSV is opened
to outlet A.
Corrossion protection
The DSV valves are factory painted with a red
oxide primer. The external surface of the valve
housing must be prevented against corrosion
with a suitable protective coating after
installation and assembly.
© Danfoss | Climate Solutions | 2023.07