Trane 2TTB3 User Manual

4

18-AC56D1-1

1. Power wiring and grounding of equipment must comply

with local codes.

2. Power supply must agree with equipment nameplate.

3. Install a separate disconnect switch at the outdoor unit.

4. Ground the outdoor unit per local code requirements.

5. Provide flexible electrical conduit whenever vibration

transmission may create a noise problem within the
structure.

6. The use of color coded low voltage wire is recommended

to simplify connections between the outdoor unit, the
thermostat and the indoor unit.

24 VOLTS

WIRE SIZE

MAX. WIRE LENGTH

18 AWG

150 FT

16 AWG

225 FT.

14 AWG

300 FT.

7. Table 1 defines maximum total length of low voltage

wiring from outdoor unit, to indoor unit, and to thermostat.

8. Mount the indoor thermostat in accordance with instruc-

tion included with the thermostat.  Wire per appropriate
hook-up diagram (included in these instructions).

After all electrical wiring is complete, SET THE THERMO-
STAT SYSTEM SWITCH IN THE OFF POSITION SO
COMPRESSOR WILL NOT RUN, and apply power by
closing the system main disconnect switch.  This will activate
the compressor sump heat (where used).  Do not change the
Thermostat System Switch until power has been applied for
one (1) hour. Following this procedure will prevent potential
compressor overload trip at the initial start-up.

1

1

3

1

Also set thermostat dial to call for cooling or heating as necessary.

2

Check only necessary if heating unit is used for indoor section and wiring has been disturbed during installation of cooling equipment.

3

When applicable.

1

Sump Heat

X

X

X

2

Indoor Fan Operation

X

X

X

X

3

Cooling Operation

X

X

X

X

X

X

4

Checking Performance

X

X

X

X

X

X

& Charge

5

Heating 

2

X

X

X

X

X

6

Inform owner on how to operate system and what to expect of it. At the same time deliver Owner’s Use and Care Booklet.

Final phases of this installation are the unit Operational and
Checkout Procedures which are found in this instruction (see
table below and pages 6 and 8). To obtain proper perfor-
mance, all units must be operated and charge adjustments
made in accordance with procedures found on page 6 and in
the Service Facts.

Units installed within one mile of salt water, including
seacoasts and inland waterways, require the addition of
BAYSEAC001 (Seacoast Kit) at the time of installation.

IMPORTANT:
See Limited Warranty information in Use and Care Manual.

Liquid Pressure Too High

Liquid Pressure Too Low

Suction Pressure Too High

Suction Pressure Too Low

Liquid Refrig. Floodback TXV System

I.D. Coil Frosting

Compressor Runs Inadequate or No Cooling

Compressor & O.D. Fan Do Not Start

Compressor Will Not Start But O.D. Fan Runs

O.D. Fan Won’t Start

Compressor Hums But Won’t Start

Compressor Cycles on IOL

I.D. Blower Won’t Start

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