SERVICING
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Max CFM is as follows:
3 Ton Models 1400 CFM
4 Ton Models 1760 CFM
5 Ton Models 2200 CFM
Main airow
adjustment is not required. The Outdoor unit will determine
the appropriate amount of indoor airow to request. Airow
Trims can be made if desired.
For Non-Communicating outdoor units, determine the
proper airow (based o tonnage of) the outdoor unit.
Most cooling systems are designed to work with airow
between 350 and 450 CFM per ton. 400 CFM/TON is
the industry standard. Once desired airow has been
determined, see Tonnage / Airow table to identify the
Tonnage Selection that is closest to the desired airow.
This table is based on 400 CFM per ton where Airow =
(400 CFM) x (Selected Tonnage).
Example: if 1520 CFM is the desired airow the Tonnage
Selection that matches this is 3.8
Enter the Tonnage (ton) menu either by using the on board
push buttons or phone application and select the Tonnage
Selection you identied.
Each individual heater element is protected with a limit
control device connected in series with each element to
prevent overheating of components in case of low airow.
This limit control will open its circuit at approximately 150°F.
1. Remove the wiring from the control terminals.
2. Using an ohmmeter, test for continuity across the
normally closed contacts. No reading indicates the
control is open - replace if necessary.
Each individual heater element is protected with a one time
fuse link which is connected in series with the element.
The fuse link will open at approximately 333°.
1. Remove heater element assembly so as to expose fuse
link.
2. Using an ohmmeter, test across the fuse link for
continuity - no reading indicates the link is open.
Replace as necessary.
1. Disassemble and remove the heating element.
2. Visually inspect the heater assembly for any breaks in
the wire or broken insulators.
3. Using an ohmmeter, test the element for continuity - no
reading indicates the element is open. Replace as
necessary.
When repairing the refrigeration system:
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