Purging Procedure, Leak Test And Test Run; Indoor/Outdoor Piping Connections; Outdoor Line Set Connections; Line Set Connection Insulation And Taping - Johnson Controls DHPM09NWM42Q1 Installation Manual

898150-UIM-B-0113
• Use tightening toque Table 11 as a guideline for indoor unit side
union joint section and tighten using two wrenches. Excessive
tightening may damage the flare section.
A
APPLY REFRIGERANT
LUBRICANT HERE
B
FIGURE 35: Indoor/Outdoor Piping Connections
OUTDOOR UNIT CONNECTION
• Apply a sealing cap or water proof tape to prevent dust or water
from getting into the refrigerant piping before it is connected.
• Apply refrigerant lubricant to the matching surfaces of the flared
line set and union before connecting them together. This will
reduce refrigerant leaks.
• Align the flared refrigerant line with valve connection then tighten
the flare nut lightly at first to obtain a smooth match. Use tighten-
ing toque Table 11 as a guideline.
INDOOR
UNIT
REFRIGERANT FLUID
DIRECTION OF FLOW
3-WAY
VALVE
(7) TURN TO
SECURE
OPEN FULLY
INLET
(2) TURN
(8) SECURE
VALVE
CAP
FIGURE 36: Outdoor Line Set Connections
INSULATION AND TAPING
1. Cover piping joints with pipe cover.
2. For outdoor unit, insulate every pipe including all pipe joints.
3. Using piping tape, apply taping starting from entry of outdoor unit.
a. Stop the end of piping tape with tape that has an adhesive agent
attached.
b. When pipes have to be arranged through above ceiling, closet or
where temperature and humidity are high, make sure you wind
additional commercially sold insulation to prevent sweating.
4. An optional field-provided exterior wall channel may be used in lieu
of taping the utility bundle to protect the bundle from UV rays,
weather, etc. See Figure 37.
PLASTIC BANDS
FIGURE 37: Line Set Connection Insulation and Taping
18
MALE FLARE
CONNECTION
(8) SECURE
2-WAY VALVE
(6) OPEN BY 1/4 TURN
(7) TURN TO OPEN FULLY
VALVE CAP
(2) TURN
(8) SECURE
(2) TURN
CONNECT TO THE
INDOOR UNIT
INSULATION MATERIAL
CONNECTION
PIPE
VINYL TAPE
(WIDE)
WRAP WITH VINYL TAPE
PIPE
DRAIN HOSE
AUXILIARY PIPES
INSTALLATION
PLATE
FIGURE 38: Utility Bundle
FIELD PROVIDED PROTECTIVE
CHANNEL (UTILITY BUNDLE INSIDE)
FIGURE 39: Exterior Wall Utility Cover (Optional)
SECTION XVII: PURGING PROCEDURE,
LEAK TEST AND TEST RUN
SERVICE VALVES
The outdoor unit suction/vapor 2-way service valve is used to purge air,
test for leaks, check operating pressures and add refrigerant to system.
This valve is equipped with a service port which has a factory installed
valve core. Figure below provides information on how to access and
operate the 2-way angle-type service valve and 2-way shut-off valve.
After the piping has been connected to the indoor unit, perform the air
purge.
INDOOR
UNIT PIPE
WRAP WITH VINYL TAPE
VINYL TAPE (WIDE)
INDOOR UNIT
CONNECTING
CABLE
Johnson Controls Unitary Products