8
SS-SVN03B-EN
Field Installation of the Re-
strictor for Multi-Function
Service Valve (Liquid Line)
Condensing units TTK, are supplied
with a multi-function service valve for
liquid line and a restrictor kit. The use
of the restrictor allows the refrigerant
expansion in installations where the
indoor unit does not have its own ex-
pansion device. The machine is
supplied with a passage orifice in-
stalled at the muti-function valve,
making it adequate for use in conjunc-
tion with indoor units that already have
their own expansion device. For use
with indoor units that does not have
an expansion device, it is necessary
to replace this passage orifice with
one of the restrictor supplied with the
machine.
Step 1. Check in the table below the
restrictor orifice code to be used, ac-
cording to the indoor unit model. The
code is marked on the restrictor body.
Step 2. Isolate the refrigerant circuit,
closing the multi-function service valve
(if the valve is open). Remove the obtu-
rator cover with a 23 mm ( 0.91”)
wrench or other appropriate wrench.
Insert a 5 mm (0.20”) Allen wrench in
the obturator and turn it clockwise until
some resistance is felt. Remove the
flanged nut and the copper cover.
Step 3. Carefully remove passage ori-
fice installed in factory, being careful
not to damage the flare nut thread and
sealing surface between the orifice and
the flare nut.
Step 4. The new restrictor should be
appropriately lubricated and have an o-
ring on the perimeter. The orifice and
the o-ring should be encapsulated in
the valve body seat, and, for that, a
small "crack" should be heard in order
to assure that the orifice was properly
installed. The assembly of these parts
is shown in the figure below:
Step 5. The liquid line tube should be
flanged and burr-free. Clean the tube to
avoid the introduction of dirt or other
strange materials in the refrigerating
circuit and possible damages in the
tube flange while the flanged nut is
tightened.
Step 6. Manually install the flare nut on
the liquid line tube and be sure to apply
the correct torque. Continue the manu-
al assembly on the valve body until a
screwing resistance is felt (metal with
metal). Then, tighten the nut using a
7/8" wrench or other adapted wrench,
according to the flare nut dimensions.
Step 7. Open the valve, turning it coun-
terclockwise (04 turns, or a resistance
is felt), using a 5 mm (0.20”) Allen
wrench.
Step 8. Replace the obturator cover,
manually turning it clockwise by approx.
half-turn.
Multi-Function Service Valve for Liquid Line
Service Valve
Multi-Function (Liquid Line)
TTK509E
034
034
TTK512E
040
040
TTK518E
047
047
TTK524E
055
055
TTK530E
063
063
TTK536E
067
067
MODEL
ORIFICE
MCW
ORIFICE
MCX & MCD
Figure 05 - Multi-Function Service Valve
ATTENTION!
!
There are indoor units that have
device valves, have been not
necessary to use the restrictors.
Flare Nut
Restrictor or Flare
Adapter
Valve Stem Cover