MITS U Series Manual

SIMPLIFIED LOW VOLTAGE
WIRING DIAGRAMS
FOR MITS AIR “U” SERIES
HEAT PUMP APPLICATIONS
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
Drawing No, Title Date
MAUIWD-01 R1 Simplified Low Voltage Wiring Diagram Add-On Heat Pump 2022-02
MASUIWD-02
Simplified Low Voltage Wiring Diagram Mits Air "U" Series
Heat Pump with MVB Air Handler
2022-02
MASUIWD-03
Simplified Low Voltage Wiring Diagram Add-On Heat Pump
with Auxiliary Heat Delay
2022-02
MAUIWD-04
Simplified Low Voltatge Wiring Diagram "U" Series with Low
Ambiient Auxiliary Switch Over
2022-02
MAUIWD-05
Simplified Low Voltage Wriing Diagram "U" Series With "L"
Annunciation
2022-02
MAUIWD-06
Simplified Low Voltage Wriing Diagram "U" Series With Unico
EC Air Handler
2022-02

B
B
B
C
CC
C
C
R
R
R
R
R
W
WW
W
W
Y
Y
Y
Y
Y
G
GG
G
G
THERMOSTATTHERMOSTAT
FURNACE
FURNACE
B C
R
Y2
OUTDOOR UNIT
OUTDOOR UNIT THERMOSTAT
SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM
MITS AIR “U” SERIES ADD-ON HEAT PUMP
™
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
MAUIWD-01 R1 2022-02
Notes:
1. t is aThermosta heat
pump type.
2. “ ” configuration is used forB
the reversing valve.
3. Push afterreset button
changing switch 4-2 to on
and power has been
restored. .
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off power to outdoor
unit, set switch 4-2 to “ON”. Restore power and push
reset switch.
H1280-E022 INTERFACE

B
C
C
R
R
W
AUX
Y
B
C
R
Y2
G
G
THERMOSTAT
OUTDOOR UNIT
AIR HANDLER
SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM
MITS AIR “U” SERIES OUTDOOR
WITH “MVB” SERIES AIR HANDLER
OUTDOOR UNIT AIR HANDLER
MOX330U-18HFN1-MR0 MVB-24HWFN1-M
MOX430U-24HFN1-MR0 MVB-24HWFN1-M
MOD30U-30HFN1-MR0 MVB-36HWFN1-MX
MOD30U-36HRN1-MR0 MVB-36HWFN1-MX
MOE30U-48HFN1-MR0 MVB-48HWFN1-MX
AIR HANDLER
SWITCH 4-1 OF 24 V.
INTERFACE BOARD (LEFT
BOARD) MUST BE SET TO
“ON”.
ON
1
SW4-1 ON
™
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off power
to outdoor unit, set switch 4-2 to “ON”.
Notes:
1. t is aThermosta heat pump
type.
2. “ ” configuration is used for theB
reversing valve.
3. Push afterreset button
changing switch 4-2 to on and
power has been restored. .
MAUIWD-02 2022-02

SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM
MITS AIR “U” SERIES ADD-ON HEAT PUMP
™
B
B
B
C
CC
C
C
R
R
R
R
R
W
WW
W
W
Y
Y
Y
Y
Y
G
GG
G
G
THERMOSTATTHERMOSTAT
THERMOSTAT
FURNACE
FURNACE
B C L
L
R
Y2
OUTDOOR UNIT
OUTDOOR UNIT
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
24 volt ac
Time Delay
on “ON”
(Set to 10 Min.)
Notes:
1. is aThermostat HEAT
PUMP type.
2. configuration is used“B”
for the reversing valve.
3. Push reset button after
changing switch to4-2
“ON” and power has
been restored. .
Interface Module H1280-E922
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off
power to outdoor unit, set switch 4-2 to
“ON”. Restore power and push reset
With Auxiliary Heat Time Delay

B
B
B
C
CC
C
C
R
R
R
R
R
W
WW
W
W
Y
Y
Y
Y
Y
G
GG
G
G
THERMOSTATTHERMOSTAT
THERMOSTAT
FURNACE
FURNACE
B CR
Y2
OUTDOOR UNIT
OUTDOOR UNIT
SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM MITS AIR “U”
SERIES ADD-ON HEAT PUMP LOW SWITCH OVERWITH AMBIENT
™
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
Notes:
1. is aThermostat heat pump
type.
2. configuration is used for the“B”
reversing valve.
3. Set thermostAMBIENT at to
temperature below which only
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off
power to outdoor unit, set switch 4-2 to
FIELD SUPPLIED
THERMOSTAT
AND RELAY
H1289-E922 INTERFACE MODULE

B
B
B
C
CC
C
C
R
R
R
R
R
W
WW
W
W
Y
Y
Y
Y
Y
G
GG
G
G
THERMOSTATTHERMOSTAT
FURNACE
FURNACE
B C L
L
R
Y2
OUTDOOR UNIT
OUTDOOR UNIT THERMOSTAT
SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM
MITS AIR “U” SERIES ADD-ON HEAT PUMP
WITH “L” ANNUNCIATION
™
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
Notes:
1. t is aThermosta heat
pump type.
2. “ ” configuration is used forB
the reversing valve.
3. Push afterreset button
changing switch 4-2 to on
and power has been
restored. .
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off power to outdoor
unit, set switch 4-2 to “ON”. Restore power and
H1280-E022 INTERFACE

SIMPLIFIED LOW VOLTAGE WIRING DIAGRAM
“U” SERIES WITH UNICO EC AIR HANDLER
™
B
B
B
B
C
CC
C
CCC
C
R
R
R
R
R R D
AFS AFS
R
W
WW
WW2 S3 E
W
Y
Y
Y
Y
Y2 Y2Y1 Y1
Y
G
GG
G
G
THERMOSTATTHERMOSTAT
UNICO EC SMART CONTROL BOARD
FURNACE
B B
OUTDOOR UNIT THERMOSTAT
OUTDOOR UNITOUTDOOR UNIT
TO ANTI FROST STATS
MODELS
MOX330U-18HFN1-MR0
MOX430U-24HFN1-MR0
MOD30U-30HFN1-MR0
MOD30U-36HFN1-MR0
MOE30U-48HFN1-MR0
MOE30U-60HFN1-MR0
Notes:
1. is aThermostat HEAT
PUMP type.
2. configuration is used“B”
for the reversing valve.
3. Push reset button after
changing switch to4-2
“ON” and power has been
restored. .
Interface Module H1280-E922
S1 B
C
S2
R
W
Y2
D
L
Y
ON
1
ON
1
ON
1
ON
1
SW4-1 OFF
SW4-2 ON
SW4-3 OFF
SW4-4 OFF
Switch 4
OUTDOOR UNIT INTERFACE BLOCK
DIP SWITCH 4-2
MUST BE SET
TO “ON”
RESET SWITCH
When resetting switch 4-2, turn off
power to outdoor unit, set switch 4-2 to
“ON”. Restore power and push reset