JOHNSON CONTROLS
10
FORM 160.43-NM4
ISSUE DATE: 11/12/2012
SECTION 2 - INSTALLATION
PRESSURE CONNECTION PIPING
Never use the enclosure for leverage to
hand tighten the pressure connection. Al-
ways use a wrench to tighten the pressure
connection to the piping. To avoid damage
to control, always hold the wrench on the
wrench flats or hex portion of the pres
-
sure connection when tightening piping
connections.
1. Installing kit supplied 1/4 Ext. Flare X 1/4 Ext.
Pipe half union fitting (YORK p/n 023 00927
000) in 025 45742 LPCO control pressure 1/4 in.
NPTI connection. Refer to Figure 2.
a. Ensure 1/4 in. pipe thread mating surfaces
are clean and free of debris or defect.
b. Use pipe thread sealant YORK p/n 013
03089 000 (Grade 554, Red, 10 ml, for re-
frigerant pipe up to 1/2” dia.) applied to 1/4
in. external pipe threads only. Do not apply
to the first 2 threads of fitting.
c. Apply tightening torque to the fitting only
while holding back on hex portion of the
LPCO control pressure connection. Secure
fitting to pressure connection tight enough to
ensure a leak free seal.
2. Installing kit supplied Capillary Tube (48 in.)
YORK p/n 026 45010 000
a. Ensure 1/4 in. flare mating surfaces are clean
and free of debris or defect.
b. Connect the 1/4 in. flare nut on 90 deg. end
of capillary tube to the 1/4 in. external flare
half union fitting at the LPCO control pres-
sure connection. Apply tightening torque to
the flare nut only while holding back on fit-
ting. Secure flare nut to fitting tight enough
to ensure a leak free seal.
c. Route the capillary tubing across to the right
hand wall of the ECC and up the right hand
wall to the area of the “Cooler” (evaporator)
panel gauge. Coil any excess capillary tubing
near the evaporator pressure tap connection.
FIGURE 2 -
PRESSURE CONTROL LEFT SIDE VIEW
LD12524
3.
Connect the 1/4 in. flare nut on straight end of
capillary tube to the 1/4 in. external flare evapora
-
tor pressure tap connection, behind the “Cooler”
(evaporator) panel gauge. Apply tightening torque
to the flare nut only while holding back on fitting.
Secure flare nut to fitting tight enough to ensure a
leak free seal.
4. Use kit supplied wire tie-wraps (YORK p/n
025 09607 000) to secure LPCO capillary tubing
as needed.
