5834853-YIM-B-0320
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Johnson Controls Ducted Systems
Options/Accessories
Economizer
The Economizer can be a factory installed option or a field
installed accessory. If factory installed, refer to the instructions
included with the outdoor air hood to complete the assembly.
Field installed Economizer accessories include complete
instructions for installation.
There are two Economizer options. Each is specific to footprint
and unit voltage:
1.
Vertical Flow application with barometric relief standard.
2.
Horizontal Flow application with barometric relief standard.
Power Exhaust
The Power Exhaust is a field installed accessory. Field installed
Power Exhaust accessories include complete instructions for
installation.
The Power Exhaust factory installed option is for Down Flow
application only.
There are two field installed Power Exhaust accessories:
1.
Down Flow application.
2.
Horizontal Flow application that requires the purchase of a
barometric relief hood.
Rain Hood
All of the hood components, including the mist eliminators, the
gasketing and the hardware for assembling, are packaged and
located between the condenser coil section and the main unit
cabinet, if the unit has factory installed options. If field installed
accessories are being installed all parts necessary for the
installation comes in the accessory.
Blower Phasing
ZX units are properly phased at the factory. Check for proper
blower rotation. If the blower rotates in the wrong direction at
start-up, the electrical connection to the unit is misphased.
Change the phasing of the
Field Line Connection at the
factory or field supplied disconnect
to obtain proper rotation.
Blower Rotation
Check for proper supply air blower rotation. If the blower is
rotating backwards, the line voltage at the unit point of power
connection is misphased (See ‘BLOWER PHASING’).
Belt Tension
The tension on the belt should be adjusted as shown in Figure 20.
When installing equipment in a facility with a 3 phase
high-leg delta power supply, care must be taken to
ensure that the high-leg conductor is not attached to
either of the two legs of the (single phase, direct drive)
X13 or ECM motors. Failure to do so can result in the
motor acting erratically or not running at all.
Check for the high leg conductor by checking voltage of
each phase to ground.
Example: A or L1 phase to ground, voltage reading is
120V. B or L2 phase to ground, voltage reading is 195 to
208V. C or L3 phase to ground, voltage reading is 120V.
Therefore B or L2 phase is the high Leg. The high
should always be wired to the center or B or L2 tap.
Note:
Check all three phase motors and compressors
for proper rotation after making a change. If it is
necessary to change 3 phase motor rotation, swap A or
L1 and C or L3 only.
Table 10: Supply Air Limitations
Model (Size)
Supply Air (CFM)
Minimum
Maximum
ZZ07 (6)
1800
3000
ZZ08 (7.5)
2250
3750
ZZ09 (8.5)
2550
4250
ZZ12 (10)
3000
5000
ZZ14 (12.5)
3750
6000
Summary of Contents for ZZ Series
Page 10: ...5834853 YIM B 0320 10 Johnson Controls Ducted Systems Figure 10 ZZE07 08 Unit Dimension...
Page 11: ...5834853 YIM B 0320 Johnson Controls Ducted Systems 11 Figure 11 ZZ09 12 Unit Dimensions...
Page 12: ...5834853 YIM B 0320 12 Johnson Controls Ducted Systems Figure 12 ZZ14 Unit Dimensions...
