RIGGING — The 2 pieces are the generator-condenser shell
assembly and the absorber-evaporator shell assembly.
1. Lift each assembly with cable slings placed under the shells,
as shown in Fig. 6, to distribute and balance the weight.
2. Position and level the absorber-evaporator assembly first.
See Position and Level the Equipment section.
3. Move the generator-condenser assembly to the top of the
absorber-evaporator assembly. Match connecting piping
for the generator-condenser and absorber-evaporator
assemblies. Make sure stamped serial numbers accom-
panying the match marks correspond on both assemblies.
Position and Level the Equipment —
Isolation pads
are not necessary for most installations. However, for cases
where isolation pads are required, refer to Fig. 11 for typical
installation.
It is not necessary to level the generator-condenser
assembly, because both assemblies are designed to be level
when the absorber-evaporator assembly has been leveled.
The 16JT chiller must be level within
1
⁄
4
in. per 20 ft
(6.3 mm per 6 m), both lengthwise and diagonally. To level
the absorber-evaporator, proceed as follows:
1. Completely fill a 50-ft (15 m) length of clear flexible tub-
ing with water.
2. Use the water gage and leveling reference points stamped
on the absorber-evaporator shell to level the absorber-
evaporator.
3. Level the absorber-evaporator with shims until require-
ments are met. If an isolation assembly is used, shim un-
der the soleplate.
4. Set anchor bolts with concrete to secure absorber-
evaporator in place.
CHIILLER ASSEMBLY
No assembly is required for one-piece units.
Assemble Two-Piece Units
1. Weld the piping connections as shown in Fig. 7-10. Make
sure the weld connections are vacuum leak tight.
2. Cut shipping braces between upper shell assemblies.
Purge Exhaust Assembly —
Install the purge ex-
haust assembly on the purge exhaust valve as shown in
Fig. 12.
Chiller Leak Test —
All field-welded joints on the chiller
must be leak tested before starting the chiller. Leak test as
follows:
1. Close all external service valves.
2. If the chiller is under vacuum, bring it to atmospheric pres-
sure with dry nitrogen.
3. Pressurize to 6 psig (40 kPa) with tracer gas. Charge through
the auxiliary evacuation valve.
4. Increase the chiller pressure to 12 psig (83 kPa) with dry
nitrogen.
Exceeding 12 psi (83 kPa) can cause severe damage to
the chiller.
5. Leak test all field-welded joints with electronic leak de-
tectors or equivalent. If the chiller 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
repaired, release the chiller pressure.
Chiller Evacuation —
Noncondensables must be re-
moved from the chiller after the chiller has been opened. To
evacuate the chiller, proceed as follows:
1. Connect an auxiliary evacuation device (Fig. 13) to the
auxiliary evacuation valve. Be sure that the line is as short
as possible and that the line size is not smaller than the
connection to the auxiliary device. Use a check valve or
oil trap on the suction lines to keep vacuum pump oil out
of the chiller. Be sure that all connections are vacuum
tight.
2. Close the external service valve(s).
3. Start the auxiliary evacuation device. Open the auxiliary
evacuation valve. Reduce chiller pressure to 1 in. (25 mm)
of mercury absolute or lower. Check pressure with an ab-
solute pressure gage at the refrigerant pump service valve.
NOTES:
1. Be sure only the chiller base is on the isolation pad.
2. Shim under soleplate to level chiller.
Fig. 11 — Typical Isolation Assembly
Fig. 12 — Purge Exhaust Assembly
8