Kelvinator JT4BE048KA Instruction Manual download pdf (Page 8)

WARNING:

The coil in the air handler is factory shipped with

a nitrogen charge. Avoid direct face exposure

or contact with valve when gas is escaping.

Always ensure adequate ventilation is present

during the depressurization process. Address

any uncertainties before proceeding. Failure

to comply with this warning could result in

equipment damage, personal injury, or death.

Refrigerant Line Connections

• Theinstaller shouldmakeeveryeffortto ensurethe

ﬁeld installed refrigerant containing components of the

system have been installed in accordance with these

instructions and sound installation practices for reliable

system operation and longevity.

• Theairhandlercoildoesnotcontainarefrigerantcharge.

Refer to the installation instructions supplied with the

outdoor unit for refrigerant charge information.

• Alwaysrefertotheinstallationinstructionssuppliedwith

the outdoor unit for piping requirements. The suction

and liquid lines must be sized in accordance with the

condensing unit speciﬁcations. See Figure 8 (page 10)

for liquid and suction line locations.

• When connecting refrigerant linesets together, it is

recommended that dry nitrogen be ﬂowing through the

joints during brazing. This will prevent internal oxidation

and scaling from occurring.

• Refrigeranttubingshouldberoutedinamannerthat

minimizes the length of tubing and the number of bends

in the tubing. It should be supported in a manner that

prevents it from vibrating or abrading during system

operation. Tubing should be kept clean of foreign debris

during installation.

• Ifpreciseformingofrefrigerantlinesisrequired,acopper

tubing bender is recommended. Avoid sharp bends and

contact of the refrigerant lines with metal surfaces.

NITROGEN

HEALTH

FLAMMABILITY

REACTIVITY

0 Minimal Hazard

1 Slight Hazard

Figure 5. Loosening of Nut & Distributor Body

7. Insert the plug (from horizontal drain pan) into the open

and unused drain hole in the drain pan at the bottom

of the unit to block bypass air.

8. Remove the corresponding drain line knockout from

the coil access door to allow access to the horizontal

drain.

9. Replace the door and attach the drain line

• Refrigerant lines should be wrapped with pressure

sensitive neoprene or other suitable material where

they pass against sharp sheet metal edges.

• B6 Series air handlers are charged through service

valves on the end of the liquid tube for each circuit.

These must be removed before brazing the line sets.

Oriﬁce Removal & Installation

The oriﬁce installed in the air handler has been sized for

use with the most popularly matched outdoor units. The

oriﬁce size as shipped from the factory is listed on the air

handler rating plate. Perform steps 1 - 9 to conﬁrm that

the oriﬁce size meets the requirements outlined in the

outdoor unit installation manual.

1. Remove the cap from the end of the liquid line.

2. Verify pressurization by depressing the Schrader valve

on the end of the liquid line. Listen for any escaping gas.

If there is no pressure, test the coil for leakage.

• Ifleakageisfound,clearlymarkthelocationoftheleak

and return the coil to the distributor for processing.

• Ifnoleaksarefound,thecoilmaybeinstalled.

3. Depress the valve to relieve all pressure from the coil.

4. Remove and discard the valve core.

CAUTION:

To prevent damage to the unit or internal

components, it is recommended that two

wrenches be used when loosening or tightening

nuts. Do not over tighten!

5. Using two wrenches, loosen the nut and distributor body

as shown in Figure 5. Turn the assembly nut counter-

clock-wise until the oriﬁce body halves are seperated.

6. Insert a light-gauge wire hook between the distributor

body and the restrictor oriﬁce while being careful not

to scratch either part. Carefully remove the restrictor

oriﬁce from the distributor body. See Figure 6 (page

9).

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Kelvinator JT4BE048KA Instruction Manual Page 8

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