MACHINE ASSEMBLY
No assembly is required for one-piece units (16DF013-
020) other than installing the burner. See Mounting the Burner
section.
Assemble 2-Piece Units (Fig. 8 and 9)
1. Weld piping connections and make sure weld connec-
tions are vacuum leak tight.
2. Install the burner. See Mounting the Burner section.
Machine Leak Test — All field-welded joints on the
chiller must be leak tested prior to starting the machine. Leak
test as follows:
1. Close all external service valves.
2. If machine is under vacuum, bring to atmospheric pres-
sure with dry air or dry nitrogen.
3. Pressurize to 6 psig (40 kPa) with tracer gas. Charge through
auxiliary evacuation valve.
4. Increase the machine pressure to 12 psig (80 kPa) with
dry air or dry nitrogen.
Exceeding 12 psi (80 kPa) can cause severe damage
to chiller.
5. Leak test all field-welded joints with electronic leak de-
tectors or equivalent. If machine has acquired a leak in
shipment or rigging, all joints must be leak tested.
6. After leak testing has been completed and leaks have been
corrected, release the machine pressure.
Machine Evacuation — Removal of non-condensables
from the machine is required after machine has been opened.
To evacuate the machine, proceed as follows:
1. Connect auxiliary evacuation device (Fig. 10) to auxil-
iary evacuation valve. Be sure that the line is as short as
possible and that line size is not smaller than connection
to auxiliary device.Acheck valve or oil trap must be used
on the suction lines to keep vacuum pump oil out of the
chiller. Be sure that all connections are vacuum tight.
2. Close external service valve(s).
3. Start auxiliary evacuation device. Open auxiliary evacu-
ation valve. Reduce machine pressure to one in. of mer-
cury absolute or lower. Check pressure with absolute pressure
gage at refrigerant pump service valve.
Fig. 8 — Machine Piping Assembly
Diagram, End View
Fig. 9 — Machine Piping Assembly Diagram, Side View
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