Service Valve - Trane TTK 509 E Installation Manual

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.
ORIFICE ORIFICE
MODEL
MCW MCX & MCD
TTK509E 034
TTK512E 040
TTK518E 047
TTK524E 055
TTK530E 063
TTK536E 067
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.
8

Service Valve

Multi-Function (Liquid Line)
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.
Multi-Function Service Valve for Liquid Line
034
040
047
055
063
067
Flare Nut
Restrictor or Flare
Adapter
Figure 05 - Multi-Function Service Valve
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.
! ATTENTION!
There are indoor units that have
device valves, have been not
necessary to use the restrictors.
Valve Stem Cover
SS-SVN03B-EN