Installation Checklist; Test Operation; Wiring Diagrams - Trane 4MXC8512B10N0 Installer Manual

Cassette Unit

Installation Checklist

Check the following points before testing the unit:
NO.
Have the indoor and outdoor units been
1
securely installed?
Has the refrigerant leak test been completed?
2
Have the pipes been properly insulated?
3
Is the water condensate drainage sufficient?
4
Does the voltage of the power supply comply
5
with the voltage on the nameplate?
Is the electric wiring and drain piping installed
correctly?
6
Is the unit grounded properly?
7
Does the power cord match the unit
8
requirements per NEC?
Are there any obstructions near the air inlets
and air outlets for the indoor and outdoor
9 units?
Have dust and debris been cleaned and
removed from the installation site?
10
Are the gas valve and liquid valve of the
11
connection pipes open completely?

Test Operation:

1. Turn on main power to the units.
2. Using the remote control, press the ON/OFF button to start operation.
3. Press the MODE button to select and test each option for normal operation. Cycle through all
functions: AUTO, COOL, DRY, FAN and HEAT. Note: If the indoor ambient temperature is
lower than 61°F (16°C) the air conditioner will not run in COOL mode.
4. Go over basic operating, maintenance and troubleshooting functions with the customer.

Wiring Diagrams

Color Key
Symbol Symbol Color
WH White
Y E Y e o l l w
RD Red
YE/GN Yellow/Green
VT Violet
Item to be checked
Symbol
GN Green
B N B o r
BU Blue
BK Black
OG Orange
The units may fall, vibrate or make noise.
Unresolved leaks may cause insufficient
cooling or heating and low pressure errors.
Lack of insulation may cause condensation,
water damage and reduced capacity.
Lack of proper drainage may cause water
damage.
Improper wiring can cause a malfunction and
fire or electrocution hazard.
Improper wiring and drainage can create a
malfunction, fire or electrocution hazard and
water damage to the unit and property.
Improper grounding can cause a malfunction
and fire or electrocution hazard.
Improper wiring can cause a malfunction and
fire or electrocution hazard.
Improper ventilation and airflow will cause
insufficient cooling and heating. Non-
compliance with unit clearances could cause a
unit malfunction, including air recirculation and
coil freezing.
Excessive dust and debris in and around the
units may cause a malfunction or damage to
the units.
Restricted refrigerant flow may cause
insufficient cooling or heating.
Symbol Color
COMP
w n
26
Possible problem
Symbol Name
Compressor
G o r u n d n i g i w e r