Mitsubishi Electric CITY MULTI PEFY-P06NMAU-E4 Technical & Service Manual page 27

[ VII Microprocessor Control ]
Table 2 shows how the field-installed heater is controlled.
Table.2 [Heater Control Table]
Mode
Change
(To -T
RA
EH1 ON
2.7 °F [1.5 °C]
EH2 ON EH1 ON for > 5 min
EH1 OFF
(To -T
RA
0.9 °F [0.5 °C]
EH2 OFF
KEY
• EH1: Electric Heater 1
• EH2: Electric Heater 2
• To: Set point temperature
• T : Return Air temperature
RA
• X: Time delay (Selectable. Default is 20 min. Selectable to 10, 15, or 25 min)
Table 3 shows how the time delay is selected.
Table.3 [Time Delay Selection Table]
Function Setting *1
108-1 Set Time Delay to 10 minutes
108-2 Set Time Delay to 15 minutes
108-3 Set Time Delay to 20 minutes *2
108-4 Set Time Delay to 25 minutes
*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 The default time delay setting is 20 minutes.
*3 Time delays are approximate.
HWE20150
Condition
T
RA
) >
AND increased by 0.9 °F
[0.5°C] in X min
(To -T
AND
2.7 °F [1.5 °C]
) ≤
Action *3
has not
) >
RA
AND increased by 0.9 °F
[0.5°C] in 5 min
- 20 -
T has not
RA
GB