Heater Control; Control Specifications And Dip S/W Setting - Mitsubishi Electric CITY MULTI PAC-AH001-1 Service Manual

7.6. Heater Control

7.6. Heater Control
Heater Operation
(Available Control Modes)
8.5 Electric Heater Control
City Multi Controller
Controller
rd
3 Party
Type
Controls
*1 Heater operation only available when operating in Return Air Control using a City Multi Controller
NOTE
• Electric heat will only operate when DIP SW are set for AHU controller to operate in Return Air Control.

7.6.1. Control specifications and DIP S/W setting

• If DIP SW are set for AHU controller to operate in Return Air Control, Damper Signal Output can be used to control 2nd stage electric heat (EH2).
1.) Control specifications and DIP S/W setting
•
• Table 1 shows the function settings for the field-installed heater. Select the desired pattern in the table
Table 1 shows the function settings the field-installed heater. Select the desired pattern in the table below, and set the
• Control specifications and DIP S/W setting
below, and set the DIP SW on the outdoor and indoor units as shown in Table 1.
• Table 1 shows the function settings the field-installed heater. Select the desired pattern in the table below, and set the DIP SW on the outdoor and indoor units as shown in Table 1.
DIP SW on the outdoor and indoor units as shown in Table 1.
Table 1. [DIP S/W]
Table 1. [DIP S/W]
Table 1.
Outdoor unit setting
DIP S/W OFF In the case of:
TKMU/YKMU: SW4: 932 OFF
TLMU/YLMU: SW4: 932 OFF
DIP S/W ON In the case of:
TKMU/YKMU:
SW4: 932 ON
TLMU/YLMU:
SW4: 932 ON
a
Default settings: SW3-2 OFF, SW3-4 OF
b Heater will not operate during all error modes. Heater will only operate during a communication error between indoor unit and outdoor unit.
Table 2
c
Heater will not operate during all error modes. Heater will only operate during a communication error between indoor unit and outdoor unit.
d 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 shows how the field-installed heater is controlled.
Table 2. [Heater Control Table]
Table 2. [Heater Control Table]
•
Table 2 shows how the field-installed heater is controlled.
Table. 2 [Heater Control Table]
(T -T )
O RA
Mode Change
> 2.7 °F[1.5 °C]
●
EH1 ON
EH2 ON
EH1 OFF
EH2 OFF
KEY
• EH1: Electric Heater 1 (CN24)
• EH2: Electric Heater 2 (CN27)
• T : Set point temperature
O
• T : Return Air temperature
RA
• X: Time delay (Selectable. Default is 20 min. Selectable to 10, 15, or 25 min)
NOTE
When electric heat signal is ON, Fan speed signal output will automatically go to HIGH.
Specifications are subject to change without notice.
PAC-AH001-1
Return Air Control
Type 1
Type 2
Condition of outdoor unit
N / A
Normal drive
Normal Drive
Defrost drive
H/P drive
H/P drive
Defrost drive
Outdoor temp.
H/P drive
Parameters a/b/c/d are set by
H/P stop
maintenance tool.
1
T has not
RA
increased by
EH1 ON for
AND
0.9 °F [0.5°C]
> 5 min
in X min
●
AND
●
30
Control Mode
Discharge Air Control
●
*1
*1
PAC-AH001-1
DIP SW
a
(AHU controller)
SW3-2 SW3-4 Mode
OFF -
ON OFF Heater Available
ON ON Heater Available
OFF -
ON OFF Heater Available
ON ON Heater Available
OFF -
ON OFF Heater Available
ON ON Heater Available
Condition
(T -T )
O RA
AND AND
> 2.7 °F [1.5 °C]
●
AND AND
*1
*1
*1
Heater Control
Defrost Error
Heater not Available
OFF OFF
ON ON b
Heater not Available
OFF OFF
ON
b
ON
Heater not Available
OFF OFF
ON ON b
T has not
RA
increased by
(T -T )
O RA
0.9 °F [0.5°C]
< 0.9 °F [0.5°C]
in 5 min
●
●
●