Mitsubishi Electric TRANE NTXAMT12A112AA Service Manual page 31

• Table 3 shows how the time delay is selected
Table. 3 [Time Delay Selection Table]
Request Code
390
391
392
393
394
1
Time delay can only be selected with MA controller. If use of a non-MA controller is desired, the time delay must first be selected
with the MA controller. Then the non-MA controller can be attached and used.
2
Delay times are approximate to ± 1 minute.
3
The default time delay setting is 24 minutes.
• Chart 1 and Table 4 show an example of heater operation.
Chart 1 [Heater Operation Example]
The figure below shows an example of electric heater operation. See the indoor unit service manuals for more information.
T - 0.9 °F [0.5 °C]
o
T - 2.7 °F [1.5 °C]
o
W1
W2
③
② ②
Step
③ ③
③
① ①
③
② ②
②
②
③
① ①
①
④
②
④
⑤
①
⑥
• Table. 4 [Heater Operation Example]
④
⑤
Step
①
②
③
Specifications are subject to change without notice.
1
Monitor Time Delay Setting
Set Time Delay to 14 minutes
Set Time Delay to 19 minutes
Set Time Delay to 24 minutes
Set Time Delay to 29 minutes
T
o
③
②
①
X min
ON
OFF
ON ⑥
③
OFF
Condition
⑥
⑥
(To -T ) > 2.7 °F [1.5 °C] has not increased by 0.9 °F [0.5°C] in X min
AND T
⑥ RA ④ RA
⑤
(To -T ) < 2.7 °F [1.5 °C] increasing faster than 0.9 °F [0.5°C] in Y min
AND T
RA RA
(To -T ) < 0.9 °F [0.5°C] ③
RA
④
(To -T ) > 2.7 °F [1.5 °C] has not increased by 0.9 °F [0.5°C] in X min
AND T
⑤
⑤ RA RA
②
(To -T ) > 2.7 °F [1.5 °C] not increasing faster than 0.9 °F [0.5°C] in Y min
AND T
RA RA
①
④
⑤
(To -T ) < 0.9 °F [0.5 °C]
RA
(T -T ) > 2.7 °F [1.5 °C]
o RA
(T -T ) < 2.7 °F [1.5 °C]
o RA
(T -T ) < 0.9 °F [0.5°C]
o RA
NTXAMT12, 18, 24, 30, 36A112AA
2
Action
3
③
②
①
④
Y
> 7
X min X min
min
⑥
Condition
AND T has not increased by 0.9 °F
RA
[0.5°C] in X min
AND T increasing faster than 0.9 °F
RA
[0.5°C] in 7 min
31 © 2022 Mitsubishi Electric Trane HVAC US LLC. All rights reserved.
⑥
T
RA
⑤
Result
W1 ON
W2 not ON
W1 OFF
W1 ON
W2 ON
W1 OFF
W2 OFF
Result
EH1 ON
EH2 not ON
EH1 OFF