Page 4 # 48306B006
Figure 4
Thermostat Designations
(Some connections may not apply.
Refer to specific thermostat and indoor unit.)
Do not connect C (common) connection between
indoor unit and thermostat except when required by
the indoor thermostat. Refer to thermostat installation
instructions. C (common) connection between indoor
unit and outdoor unit required for proper operation.
Without Auxiliary Heat
With Auxiliary Heat
3. Install room thermostat on an inside wall that is not
subject to drafts, direct sunshine, or other heat sources.
4. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit (see Figure 4).
5. Do not bundle any excess 24V control wire inside control
box. Run control wire through installed wire tie and tighten
wire tie to provide low voltage strain relief and to maintain
separation of field-installed low and high voltage circuits.
Table 2
Refrigerant Line Set Diameters (in.)
For installations exceeding 50', contact
Technical Services at (419) 483-4840.
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000,814/34/34/34/34/3
000,42 4/3 4/3 4/3 4/3 8/7
000,034/34/34/38/78/7
000,63 8/7 8/7 8/7 8/7 8/1-1
000,248/78/78/78/1-18/1-1
000,84 8/7 8/7 8/7 8/1-1 8/1-1
000,068/1-18/1-18/1-18/1-18/1-1
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000,818/38/38/38/38/3
000,42 8/3 8/3 8/3 8/3 8/3
000,038/38/38/38/32/1
000,63 8/3 8/3 8/3 8/3 2/1
000,248/38/38/32/12/1
000,84 8/3 8/3 8/3 2/1 2/1
000,068/38/38/32/12/1
Refrigerant Piping
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (sweat connections) to the indoor
coil (flare or sweat connections).
Select line set diameters from Table 2 to ensure that oil
returns to the compressor. Size vertical suction riser to
maintain minimum velocity at minimum capacity. Recom-
mended line length is 50' or less. If more than 50' line set is
required, contact Technical Services at (419) 483-4840.
Table 2 shows the diameters for line sets up to 100' although
vertical lift applications and trapping requirements need to be
reviewed with Technical Services for line sets over 50'.
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