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IM-KSAIC03-03                                                                            Specifications subject to change without notice.                                                                                         

15

APPENDIX 1 - COMPATIBILITY AND FAN SPEED WIRING

The 24V Interface Kit is compatible with most single stage conventional 24V thermostats matched with the conventional fan coils listed in

Tables 17, 18, and 19. Before installation, check the compatibility of your outdoor and indoor fan coil. 

Professional installation is

recommended.

 For Ductless indoor units compatibility, refer to the Compatibility Charts on HVACpartners.com for the proper matches and

serial numbers. 

Select Proper Blower Speed For the Fan Coil

Before operating the unit, ensure that the proper blower speed has been selected. Fan speeds are selected manually. Refer to the indoor unit’s 

installation manual for instructions on how to change the fan speed and select the taps (see Tables 17, 18, and 19) for the proper matches. 

24V Interface Fan Speed Wiring (See “WIRING” on page 11 for Wiring Connections)

G3 is the High Fan Speed terminal and should be connected to the high tap speed inputs at the fan coil.
G2 is the Medium Fan Speed terminal and should be connected to the medium tap speed inputs at the fan coil.
Tap G1 is the Low Fan Speed terminal and should be connected to the low tap speed inputs at the fan coil. The 24V interface may be connected

to a low Tap Speed, based on the indoor unit’s installation instructions. 

Table 17 — Compatibility with FMA4 Fan Coils

Table 18 — Compatibility with FMC4 Cased Horizontal Fan Coils

Table 19 — Compatibility with FMU4 Uncased Horizontal Fan Coils

Table 20 — Compatibility with FV4 Fan Coils

Indoor

 Volt-

Ph@60Hz

Kit Number

Nominal System 

Size MBTUH

Indoor Model 

Number

Outdoor Model 

Number

Recommended Maximum 

Indoor Fan 

Speed Tap Number

FMA4

 Vertical

Fan Coil

208/230-1

KSAIC0301230

12

FMA4X1800AL

38MAQB12R--3

Tap 1

18

FMA4X1800AL

38MAQB18R--3

Tap 2

24

FMA4X2400AL

38MAQB24R--3

Tap 5

30

FMA4X3000AL

38MAQB30R--3

Tap 2

36

FMA4X3000AL

38MAQB36R--3

Tap 4

Indoor

 Volt-

Ph@60Hz

Kit Number

Nominal System Size 

MBTUH

Indoor Model 

Number

Outdoor Model

Number

Recommended Maximum 

Indoor Fan 

Speed Tap Number

FMC4

 Cased 

Horizontal

Fan Coil

208/230-1

KSAIC0301230

12

FMC4Z1800AL1

38MAQB12R--3

Low (Black)

18

FMC4Z1800AL1

38MAQB18R--3

Medium low (Blue)

24

FMC4Z2400AL1

38MAQB24R--3

Medium low (Blue)

30

FMC4Z3000AL1

38MAQB30R--3

Medium high (White)

36

FMC4Z3600AL1

38MAQB36R--3

Medium high (White)

Indoor

 Volt-

Ph@60Hz

Kit Number

Nominal System Size 

MBTUH

Indoor Model 

Number

Outdoor Model 

Number

Recommended Maximum 

Indoor Fan 

Speed Tap Number

FMU4

 Uncased 

Horizontal

Fan Coil

208/230-1

KSAIC0301230

12

FMU4Z1800AL1

38MAQB12R--3

Low (Black)

18

FMU4Z1800AL1

38MAQB18R--3

Medium low (Blue)

24

FMU4Z2400AL1

38MAQB24R--3

Medium low (Blue)

30

FMU4Z3000AL1

38MAQB30R--3

Medium high (White)

36

FMU4Z3600AL1

38MAQB36R--3

Medium high (White)

Indoor

 Volt-

Ph@60Hz

Kit Number

Nominal System 

Size MBTUH

Indoor Model 

Number

Outdoor Model 

Number

Recommended Fan Speed 

Wiring and Configuration

FV4

 Fan Coil

208/230-1

KSAIC0301230

12

FV4CNF002L00

38MAQB12R--3

Connect G1 on the 24V 

interface to G on the fan coil. 

Under the configuration taps 

for AC/HP CFM ADJUST, the 

recommendation is to 

select 

NOM. 

Refer to “TXV REPLACEMENT 

PROCESS FOR PIPING 

ADAPTER FOR 

FV4CNF002L00 AND 

FV4CN(B,F)003L” on page 10 

and “APPENDIX 5 - FV4C 

AIRFLOW DELIVERY” on 

page 16 for setup.

18

FV4CNF002L00

38MAQB18R--3

24

FV4CNF002L00

38MAQB24R--3

30

FV4CN(B,F)003L

38MAQB30R--3

36

FV4CN(B,F)003L

38MAQB36R--3

Summary of Contents for KSAIC0301230

Page 1: ...y Understand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which may result in severe personal injury or de...

Page 2: ...refrigerant compressors Pressurized mixtures of air or gases containing oxygen can lead to an explosion WARNING INSTALLATION Entrust a licensed contractor to install the unit Installation by unskilled...

Page 3: ...ble 3 24V Interface Clearance Dimensions NOTE 24 in 610mm minimum for service access or use local code Fig 3 Clearances Clearances Unit Minimum Value In mm Sides 5 9 150 Front 24 610 Top and Bottom 3...

Page 4: ...er the screw SYSTEM CONFIGURATION NOTES The thermostat should be configured for use with a as a single stage Cooling and Heating DO NOT configure the thermostat as a Heat Pump The wireless remote cont...

Page 5: ...ndoor to the outdoor unit until the static pressure settings are complete refer to the Ducted unit installation manual On selected indoor units the Up Down Swing Louver functions as a control to turn...

Page 6: ...general installation instructions For Ducted units in order to initially setup the static pressure the 24V interface must be bridged Temporarily connect the communication wires S1 and S2 from the indo...

Page 7: ...it until the static pressure settings are complete see the Ducted unit installation manual When static pressure is adjusted reconnect L1 L2 S and G wires to the terminal blocks In the AUTO mode the sy...

Page 8: ...a single stage cooling and heating DO NOT configure the thermostat as Heat Pump NOTES Follow the indoor and outdoor unit s general installation instructions The T1 Return air temperature sensor should...

Page 9: ...oor unit s general installation in the next column 9 Configure the dip switches on the 24V Interface for proper operation For Heat Pump all switches OFF except SW1 1 ON For Cooling Only all switches O...

Page 10: ...he Teflon gasket on the brass tip of the Piping Adapter and insert into the aluminum distributor head Thread the piping adapter brass nut onto the distributor line and tighten finger tight 1 2 turn Fi...

Page 11: ...Using a Conventional Fan Coil The following steps should be taken when using this device with a conventional fan coil unit scenarios 4 and 5 1 Indoor coil metering device TXV Piston must be removed 2...

Page 12: ...il only available on scenarios 1 through 3 Table 11 DIP Switch 2 2 NOTE Applicable only to the Ductless Style Indoor Heat Pump units in the HEATING mode DIP Switch 3 1 On Ductless systems Dry is used...

Page 13: ...emperature sensor T5 malfunction Outdoor Service Manual F4 Outdoor unit EEPROM parameter error Outdoor Service Manual F5 Outdoor fan speed has been out of control Outdoor Service Manual F6 T2b sensor...

Page 14: ...opens and closes based on the system s alarm status This is normally a an open dry contact Work Output CN6 This contact is a dry contact that opens and closes based on the system s running or not run...

Page 15: ...minal System Size MBTUH Indoor Model Number Outdoor Model Number Recommended Maximum Indoor Fan Speed Tap Number FMA4 Vertical Fan Coil 208 230 1 KSAIC0301230 12 FMA4X1800AL 38MAQB12R 3 Tap 1 18 FMA4X...

Page 16: ...door coil s size No refrigerant addition is necessary for the FV4 any size All the outdoor units are shipped from the factory pre charged for 25ft of piping length See the outdoor unit s installation...

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