Figure 8: Jack-up procedures (2)
Structural support and installation
Structural support of the unit must be provided as indicated for maximum efficiency. Make sure
there is enough maintenance space around the chiller so work can be performed safely.
Install foundation bolts in level concrete to secure the unit and prevent shifting in the event of an
earthquake. Rubber vibration isolator pads must be fit to the machine base before installation as
shown in Figure 9. The tolerance for leveling is 1 in. in 1,000 in., or 1 mm in 1,000 mm, according to
the bottom edge of the tube plate.
CAUTION
Before installing the machine, waterproof the floor in case of future leaks.
Dimensions can be found in Table 8. For the external dimensions of the machine and foundation,
see the full view of the machine and the foundation drawing.
For serviceability and maintenance, leave a minimum space of 3.3 ft on all sides of the chiller. To
ensure there is adequate clearance for tube removal, the space at the end must equal 1.25 x the
length of the unit.
Indoor and outdoor installation
This chiller is for inside use only. Exposure to the elements can compromise the integrity of the
thermal insulation. Minimum allowable temperature for outdoor installation is 32°F, provided that
the chiller includes the cold ambient option. Outdoor installations will be considered on a case-by-
case basis by a Johnson Controls Service Representative
YHAU-C Single Effect Steam-Fired Absorption Chiller26
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