Condensate Drains Ð See Fig.
After the unit has been set in place on the roof:
1.Select the appropriate drain locations. The 034 units have 6 drain holes (3 per side), and the
2.Remove the drain assemblies and attach them to the bot- tom of the unit base rails at the preferred drain locations using the screws provided. See Fig. 6.
NOTE: Use a trap at least
3.Cover the remaining drain holes with the seal plates and screws provided. See Fig. 7.
4.Apply a bead of RTV or similar sealant around the drain assemblies and seal plates where they attach to the base rail. See Fig. 8.
NOTE: If unit is slab mounted, holes will need to be drilled in the side of the base rail and the holes
Install Outdoor Hoods
UNIT SIZES 034 AND 044
25%
1.
2.Replace the 6 screws.
3.Remove the holddown screw from each upper corner of each hood.
4.Pivot hoods outward (2 hoods total).
5.Install 17 screws around outside of each hood. (Screws are in the fastener package taped to the basepan inside the fan section.)
6.Apply a bead of RTV or similar sealant to corner of each hood at pivot point to prevent water leaks. See Fig. 9.
Economizer Hoods (Units With Economizer Option) Ð Fol- low the same procedure described in 25%
UNIT SIZES
25%
Economizer Hoods (Units With Economizer Option)
1.Remove the 6 screws holding each of the 4 economizer shipping covers in place.
2.Replace the screws.
3.Remove the holddown screw from each upper corner of each economizer hood.
4.Pivot hoods outward. (There is a total of 4 hoods.)
5.Install 18 screws, (5 each side, 6 top, and 2 bottom), around the outside of each hood. (Screws are in the fastener pack- age taped to the basepan inside the fan section.)
6.Apply a bead of RTV or similar sealant to corner of econo- mizer hood at pivot point to prevent water leaks. (See Fig. 9.)
Outdoor-Air Inlet Adjustments
MANUAL
ECONOMIZER SETTINGS
Enthalpy Sensor (See Fig. 11.) Ð This sensor is located be- hind the ®lters in the end economizer hood (the upper hood on sizes
NOTE: Enthalpy control setting dial is on the economizer motor.
Damper Vent Position Ð The position setting adjustment is located on the cover of the economizer motor. See Fig. 15. Adjust by setting the fan switch at ON position (continuous fan operation), and setting the system selector switch to OFF position. Then turn adjustment screw slowly until the damp- ers assume the desired vent position. Do not manually op- erate the damper motor; damage to the motor may result.
Economizer Damper Linkage Adjustment Ð When replac- ing economizer damper motors, or if the linkage has come loose, it is critical that the linkages be adjusted correctly. They are sensitive, and incorrect adjustment can cause the motor to stall.
NB,NP Unit Minimum Position Set Point Ð Minimum econo- mizer position is set using the keypad and display module. Refer to Control and Troubleshooting literature for more details.
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