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841890-UIM-B-0612

4

LIMITATIONS

These coils should be installed in accordance with all national and local
safety codes.

SECTION III: COIL METERING DEVICES

An orifice or a TXV to be installed in the field. Refer to installation man-
ual with TXV kit. It is recommended to install the orifice or TXV kit prior
to installation of coil in cabinet and brazing line sets.

Consult the outdoor installation guide for outdoor units that require an
orifice as a metering device for the indoor coil. The orifice and the
Schraeder core are supplied with the outdoor unit. Install Schraeder
core in the suction line Schraeder body and cap with the supplied plas-
tic cap.

TXV METERING DEVICE

Please refer to Technical Guide to verify which TXV is installed in this
coil and that this is a valid system match for the AC or HP unit installed.

The temperature sensing bulb is attached to the coil suction header
line.

TABLE 4: 

Coil Air Flow Limits

Coil 

Size

Outdoor Unit 

Tons

CFM Limits

Minimum

Maximum

18

1-1/2

525

675

24

1-1/2

525

675

2

700

900

30, 32

2

700

900

2-1/2

875

1125

35

2-1/2

875

1125

3

1050

1200

36, 37

2-1/2

875

1125

3

1050

1350

42

3

1050

1350

3-1/2

1225

1575

43

3

1050

1350

3-1/2

1225

1575

48

3

1050

1350

3-1/2

1225

1575

4

1400

1800

60, 62, 64

4

1600

1800

5

1750

2250

For models that have factory installed TXV’s, take caution not to
apply high temperatures to the TXV assembly or equalizer line
while brazing.

NOTICE

 FIGURE 3:  

TXV Bulb Installation

 FIGURE 4:  

Proper Bulb Location

COIL UNDER PRESSURE.
Relieve pressure by depressing schrader stem. Coil may have fac-
tory installed TXV or may require orifice or TXV to be added. See
outdoor unit documentation for correct orifice or TXV to be used.
Refer to coil nameplate for orifice or TXV identification for this unit.

The coil should be open to the air for no more than 2 minutes to
keep moisture and contaminates from entering the system. If the
coil cannot be brazed into the refrigeration system in that time, the
ends should be temporarily closed or plugged. For a short term
delay, use masking tape over the ends of the copper tubing to close
the tube to the air. For a longer term delay, use plugs or caps.
There is no need to purge the coil if this procedure is followed.

Vapor
Line

Thermal
Expansion
Valve Bulb

Thermal
Expansion
Valve

Distributor
Body

Liquid
Line

TXV
Equalizer
Line

(Wrapped with

insulation)

TXV BULB
(Cover completely
with insulation)

SCREW

CLAMP

NUT

SUCTION LINE

NOTICE

Содержание MC

Страница 1: ...hazardous situation which if not avoided will result in death or serious injury WARNING indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION...

Страница 2: ...MC Coils Only Primary Drain Secondary Drain Bottom Door Panel FIGURE 2 Component Location Coil PC Label Location Coil Access Panel Primary Drain Secondary Drain Bottom Door Panel Alternate Drain Locat...

Страница 3: ...See York bulletin 690 01 AD1V for details 20 3 8 Opening B C 3 4 Flange A 21 1 2 BOTTOM OPENING DIMENSIONS D 20 1 4 TABLE 3 Dimensions PC Coils Models Dimensions 1 Refrigerant Connections 2 Height Wid...

Страница 4: ...0 1350 42 3 1050 1350 3 1 2 1225 1575 43 3 1050 1350 3 1 2 1225 1575 48 3 1050 1350 3 1 2 1225 1575 4 1400 1800 60 62 64 4 1600 1800 5 1750 2250 For models that have factory installed TXV s take cauti...

Страница 5: ...ns and Condensate Drain Connections One mounting plate is provided with the coils COIL FLANGE FOR DOWNFLOW AND HORIZONTAL LEFT KIT INSTALLATION The coils include removable flanges to allow proper fit...

Страница 6: ...handled in one of several ways best suited to the installation Upflow horizontal or downflow applications may be used The vast majority of problems encountered with combination heating and cooling sys...

Страница 7: ...n it should be piped to a loca tion that will give the occupant a visual warning that the primary drain is clogged If the secondary drain is not used it must be capped DO NOT use TeflonTM tape pipe do...

Страница 8: ...il using a portable manometer and static pressure tips To prepare coil for static pressure drop measurements the system should have been recently operational in cooling mode Drill 2 holes one 3 after...

Страница 9: ...TXV Bulb positioned correctly Is Bulb Insulated Is Equalizer Line connected FIGURE 16 Drain Traps Secondary Primary 3 Min Were the primary and secondary drains trapped correctly FIGURE 17 Location of...

Страница 10: ...change without notice Published in U S A 841890 UIM B 0612 Copyright 2012 by Johnson Controls Inc All rights reserved Supersedes 841890 UIM A 0412 York International Corp 5005 York Drive Norman OK 73...

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