b. Cover outdoor vent with a rain cap to prevent exces-
sive moisture from entering the vent line.
c. Place a condensate drain at the low point in the piping
to prevent any water build-up on the atmospheric side
of the disc assembly.
Step 5 —Apply Field Insulation (If Required) —
Apply insulation as indicated in job data. If shipping vacuum
test indicates significant loss of machine vacuum, do not ap-
ply insulation. Protect insulation from weld heat damage and
weld splatter during installation.
Recommended Areas for Insulation
1. Steam or hot water condensate lines
2. Entering and leaving chilled water lines
3. Chilled water boxes (install drain plugs before
insulating)
4. Generator shell (if heat is objectionable)
5. Refrigerant pump and piping
Step 6 — Make Electrical or Pneumatic Con-
nections —
Field wiring must be installed in accordance
with job wiring diagrams and all applicable electrical codes.
CHECKAVAILABLE POWER SUPPLYAND SAFETY IN-
TERLOCKS — Check available power supply and safety
interlocks to be sure they match the machine equipment. Job
voltage, amperage and values are circled in red on the panel
wiring diagram.
CHECK HEATERSAND FUSES — Check heaters and fuses
(located in a plastic bag inside the control panel) against a
sizing table located on the wiring diagram inside the control
panel door. Check the motor nameplate for full load ampere
rating. Do not install heater or fuses until safety controls have
been checked out at initial start-up.
CHECK MACHINES WITH PNEUMATIC CAPACITY
CONTROLS — Make sure they have a continuous supply
of clean, dry, 18 psig air with volume of at least 0.3 cfm. Also,
make sure the pneumatic supply fitting on machine control
panel is labeled.
INSTALL CAPACITY CONTROL VALVE(S) — The valve
can be either electronic or pneumatic.
Electronic Control Valve — Install wiring to control valve(s)
as shown on wiring diagram located inside control panel door.
Pneumatic Control Valve — Install
1
⁄
4
-in. plastic tubing from
control panel to control valve(s) as shown on diagrams lo-
cated inside control panel door.
INSTALL CHILLED WATER SENSOR — The sensor is
either electronic or pneumatic depending on what type of
capacity control valve was installed. Refer to Fig. 8.
Fig. 7 — Low-Pressure (2 to 15 psig) Steam
Supply Piping
Fig. 6 — Typical Piping and Wiring
6
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