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match, replace indoor coil piston with piston shipped with outdoor
unit. The piston shipped with outdoor unit is correct for any
approved indoor coil combination.

Do not operate unit in the vicinity of toxic or flammable
material. Failure to follow this warning can result in personal
injury, fire, or death.

Remove indoor coil piston if unit is to be installed on system
with a TXV metering device.

Step 5—Make Piping Connections

Relieve pressure and recover all refrigerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow-control devices,
including solenoid valves.

Fig. 2—Unit Reference Drawing

UNIT

SIZE

A/B

C

D

E

F

G

In.

mm

In.

mm

In.

mm

In.

mm

In.

mm

In.

mm

024

22-1/2

571.5

3-11/16

93.6

18-1/8

460.4

14-3/8

365.1

5/8

15.88

33-15/16

862.0

036

30

762.0

6-1/2

165.1

23-1/2

596.9

20

508.0

3/4

19.05

39-15/16

1014.4

048

30

762.0

6-1/2

165.1

23-1/2

596.9

20

508.0

7/8

22.23

33-15/16

862.0

060

30

762.0

6-1/2

165.1

23-1/2

596.9

20

508.0

7/8

22.23

33-15/16

862.0

A97004

AIR DISCHARGE

3

/

8

″  

DIA 

LIQUID LINE CONN

FIELD CONTROL 
SUPPLY CONN

7

/

8

″ 

DIA HOLE

AIR 

DISCHARGE

AIR 
DISCHARGE

AIR IN

AIR IN

1.  ALLOW 30

″ 

CLEARANCE TO SERVICE END OF

     UNIT, 48

″ 

ABOVE UNIT, 6

″ 

ON ONE SIDE, 12

     ON REMAINING SIDE, AND 24

″ 

BETWEEN

     UNITS FOR PROPER AIRFLOW.
2.  MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING MODE IS
     55

°

 F (UNLESS LOW AMBIENT CONTROL IS USED) MAX. 115

°

 F.

3.   MAXIMUM OUTDOOR OPERATING AMBIENT IN HEATING MODE IS 66

°

 F.

4.   SERIES DESIGNATION IS THE 13TH POSITION  OF THE UNIT
      MODEL NUMBER.

NOTES:

FIELD POWER 
SUPPLY CONN

7

/

8

″ 

DIA HOLE WITH 

1

/

8

″ 

DIA KNOCKOUT

AND 1 

3

/

8

″ 

DIA KNOCKOUT

 

A

D

AIR IN

E

B

AIR 

IN

C

DIA SUCTION LINE CONN

G

Fig. 3—Accessory Heat Pump Feet

A97006

SERVICE
ACCESS

2

Summary of Contents for 38YCX

Page 1: ...k Equipment and Job Site UNPACK UNIT Move to final location Remove carton taking care not to damage unit INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged...

Page 2: ...8 460 4 14 3 8 365 1 5 8 15 88 33 15 16 862 0 036 30 762 0 6 1 2 165 1 23 1 2 596 9 20 508 0 3 4 19 05 39 15 16 1014 4 048 30 762 0 6 1 2 165 1 23 1 2 596 9 20 508 0 7 8 22 23 33 15 16 862 0 060 30 7...

Page 3: ...e and completely sur rounds vapor tube 9 When necessary use hangar straps which are 1 in 25mm wide and conform to shape of tubing insulation See Fig 4 10 Isolate hangar straps from insulation by using...

Page 4: ...ordance with existing electrical codes Failure to follow this warning can result in an electric shock fire or death NOTE Use No 18 AWG American Wire Gage color coded insulated 35 C minimum wires If th...

Page 5: ...R G THERMOSTAT W2 L E C R G ODTS2 ODTS1 BLU VIO SYSTEMS WITH TWO OUTDOOR THERMOSTATS A97053 HEAT PUMP E L O O Y Y SYSTEMS WITHOUT OUTDOOR THERMOSTAT FB4ASX FAN COIL W2 W2 W2 C C C R R G THERMOSTAT R G...

Page 6: ...ed with a time delay relay circuit the blower runs an additional 90 sec to increase system efficiency Heating On a call for heating the thermostat makes circuits R Y and R G If phasing is correct circ...

Page 7: ...n heating mode allowing frost to accumulate on outdoor coil 4 After a few minutes in heating mode liquid line temperature should drop below closing point of defrost thermostat ap proximately 30 F NOTE...

Page 8: ...31 38ycxc3si Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Tab 5a 5a PC 101 Catalog No 003 88...

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