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13HPD SERIES

MANIFOLD GAUGES

RECOVERY MACHINE

CLEAN RECOVERY CYLINDER

OUTDOOR UNIT

Figure 6. Typical Refrigerant Recovery (Method 1)

METHOD 2:

If the existing outdoor unit is equipped with manual shut−off
valves then:

1. Start the existing HCFC−22 system in the cooling

mode and close the liquid line valve.

2. Pump all of the existing HCFC−22 refrigerant back into

the outdoor unit.

NOTE − It may be necessary to bypass the low pressure
switches to ensure complete refrigerant evacuation.

3. When the low side system pressures reach 0 psig,

close the vapor line valve.

4. Disconnect all power to the existing outdoor unit.

Check gauges after shutdown to confirm that the
valves are not allowing refrigerant to flow back into the
low side of the system.

5. Disconnect the liquid and vapor lines from the existing

outdoor unit.

Disconnecting and Removing Old
Outdoor Unit

Perform the following task at the existing outdoor unit:

Disconnect line set at the service valves.

Disconnect electrical service at the disconnect switch.

Remove old outdoor unit.

Positioning New Outdoor Unit

CAUTION

In order to avoid injury, take proper precaution when
lifting heavy objects.

See 

Unit Dimensions

 on page 2 to determine the correct

mounting size slab, platform or support. Refer to figure 7
for mandatory installation clearance requirements

(SEE NOTES

BELOW

FIGURE)

SEE NOTES NOTES

BELOW FIGURE)

(SEE NOTES

BELOW FIGURE)

(SEE NOTES

BELOW

FIGURE)

Figure 7. Installation Clearances

NOTES:

Service clearance of 30 in. (762 mm) must be
maintained on one of the sides adjacent to the control
box.

Clearance to one of the other three sides must be 36
in. (914 mm)

Clearance to one of the remaining two sides may be
12 in. (305 mm) and the final side may be 6 in. (152
mm)

48 in. (1219 mm) clearance required on top of unit.

A clearance of 24 in. (610 mm) must be maintained
between two units

POSITIONING CONSIDERATIONS

Consider the following when positioning the unit:

Some localities are adopting sound ordinances based
on the unit’s sound level registered from the adjacent
property, not from the installation property. Install the
unit as far as possible from the property line.

When possible, do not install the unit directly outside
a window. Glass has a very high level of sound
transmission. For proper placement of unit in relation
to a window see the provided illustration in figure 8.

INSTALL UNIT AWAY

FROM WINDOWS

TWO 90° ELBOWS INSTALLED IN LINE SET

WILL REDUCE LINE SET VIBRATION.

Figure 8. Outside Unit Placement

Summary of Contents for Merit 13HPD018

Page 1: ...61M 09 07 Supersedes 504 943M Table of Contents Shipping and Packing List 1 13HPD Outdoor Unit 1 Unit Dimensions 2 General Information 2 Recovering Refrigerant from Existing System 4 Disconnecting and...

Page 2: ...rom address shown below or contact your supervisor Lennox Industries Inc P O Box 799900 Dallas TX 75379 9900 General Information These instructions are intended as a general guide and do not supersede...

Page 3: ...stripping of the various caps used the appropriately sized wrench should be used and fitted snugly over the cap before tightening Operating Angle Type Service Valve To Access Angle Type Service Port...

Page 4: ...tem clockwise 90 3 Replace the stem cap and tighten as follows With Torque Wrench Finger tighten and then tighten per table 1 Without Torque Wrench Finger tighten and use an appropriately sized wrench...

Page 5: ...lifting heavy objects See Unit Dimensions on page 2 to determine the correct mounting size slab platform or support Refer to figure 7 for mandatory installation clearance requirements SEE NOTES BELOW...

Page 6: ...s the refrigerant lines will not create unnecessary vibration and subsequent sounds REFRIGERANT LINE SET Field refrigerant piping consists of liquid and vapor lines from the outdoor unit braze connect...

Page 7: ...TUDS STRAP SLEEVE WOOD BLOCK STRAP SLEEVE WIRE TIE WIRE TIE WIRE TIE INSIDE WALL Figure 11 Refrigerant Line Set Installing Vertical Runs New Construction Shown NOTE Similar installation practices shou...

Page 8: ...fixed orifice size for each unit In non standard applications the provided fixed orifice may not be appropriate CTXV SYSTEMS 1 On fully cased coils remove the coil access and plumbing panels 2 Remove...

Page 9: ...VALVE Figure 16 Typical Service Valve Port Core Removal WARNING Danger of fire Bleeding the refrigerant charge from only the high side may result in the low side shell and suction tubing being pressu...

Page 10: ...s IMPORTANT Leak detector must be capable of sensing HFC refrigerant 1 Connect an HCFC 22 manifold gauge set high pressure hose to the vapor valve service port NOTE Normally the high pressure hose is...

Page 11: ...if there is a rapid rise in sure indicates a relatively large leak If this occurs repeat the leak testing procedure NOTE The term absolute pressure means the total actual pressure within a given volu...

Page 12: ...ground NOTE For proper voltages select thermostat wire gauge per the following table Table 5 Wire Run Lengths Wire run length AWG Insulation type Less than 100 feet 30 m 18 Color coded with a minimum...

Page 13: ...must be grounded in accordance with national and local codes NOTE For use with copper conductors only Refer to unit rating plate for minimum circuit ampacity and maximum over current protection size...

Page 14: ...you have consulted with the power company and the voltage condition has been corrected 6 Set the thermostat for a cooling demand Turn on power to the indoor indoor unit and close the outdoor unit disc...

Page 15: ...the unit during warm weather use one of the following procedures CHARGE USING THE SUBCOOLING METHOD OUTDOOR TEMPERATURE 65 F 18 C When the outdoor ambient temperature is below 65 F 18 C use the subcoo...

Page 16: ...mperature F C Outdoor Temperature F C Approach Temperature F C Model 018 024 030 036 042 048 060 F C 7 3 9 8 4 4 9 5 13 7 2 7 3 9 9 5 7 3 9 NOTE For best results use the same electronic thermome ter t...

Page 17: ...es two components a defrost thermostat and a defrost control board DCB DEFROST THERMOSTAT The defrost thermostat as illustrated in figure 27 is located on the liquid line between the CTXV and the dist...

Page 18: ...gure 29 DS1 and DS2 Diagnostic LEDs The DCB uses two LEDs DS1 and DS2 for diagnostics The LEDs flash a specific sequence according to the condition Table 10 DS1 and DS2 LED Codes Defrost Control Board...

Page 19: ...occasional sounds that may occur while the unit is cycling in and out of the defrost mode When a jumper is installed on the DELAY pins the compressor will be cycled off for 30 seconds going in and out...

Page 20: ...n operation 4 Electronic Air Cleaner Some systems are equipped with an electronic air cleaner designed to remove airborne particles from the air passing through the cleaner If your system is so equipp...

Page 21: ...er operates only when the thermostat calls for heating or cooling This mode is generally preferred when humidity control is a priority The ON or CONT mode provides continuous indoor blower operation r...

Page 22: ...r Temperature HEATING MODE Vapor Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or ins...

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