Heater Control; Control Specifications And Function Setting - Mitsubishi Electric TRANE NTXAMT12A112AA Service Manual

9. HEATER CONTROL

9.1. Control Specifications And Function Setting

• Table 1 shows the mode setting for the field-installed heater.
Table. 1 [Function Table]
Select unit numbers 01 to 03 or all units (AL [wired remote controller] / 07 [IR wireless remote controller])
Mode (function ) No.
Wired remote controller
Factory Setting
(RF thermostat)
11 (111) 23 (123)
1 1
2 1
2 2
*1 Heater will not operate during all error modes. Heater will only operate during a communication error between indoor unit and
outdoor unit.
• Table 2 shows how the field-installed heater is controlled.
Table. 2 [Heater Control Table]
(To -T RA ) >
Mode Change
2.7 ° F
[1.5 °C]
W1 ON ○
W2 ON
W1 OFF
W2 OFF
KEY
• W1: Furnace Heat Stage 1
• W2: Furnace Heat Stage 2
• To: Set point temperature
• T RA : Return Air temperature
• X: Time delay (Selectable. Default is 24 min. Selectable to 24 or 29 min)
Specifications are subject to change without notice.
NTXAMT12, 18, 24, 30, 36A112AA
Mode
●
Heater Available
─
Disable heater during
Defrost and Error
Heater Available
─
Enable heater and fan
during Defrost and
Error *1
T RA has not
W1 ON for
increased by
AND
0.9 °F [0.5° > 7 min
C] in X min
○
AND
○
30
Heater Operation In Heater Operation
Error During Defrost
Heater Available
OFF OFF
ON ON
Condition
(To -T RA ) >
AND 2.7 ° F AND
[1.5 ° C]
○
AND AND
© 2022 Mitsubishi Electric Trane HVAC US LLC. All rights reserved.
Fan Control When
Heater ON
High
High
T RA has not (To -T RA ) <
increased by 0.9 ° 0.9 °F
F [0.5° C] in 7 min [0.5° C]
○
○
○