Carrier 38SE User Manual

Number One Air Conditioning Mater

Division of Carrier Corporation

Carrier Parkway ♦ Syracuse NY 13201

Air-Cooled Condensing Units

TRANSPORTATION DAMAGE

File claim with shipping company if shipment is

damaged or incomplete.

PRELIMINARY SURVEY

Consult local building codes and National Electrical

Code (NEC) for special installation requirements.

When installing unit, allow sufficient space for airflow clearance, wiring, refrigerant piping and servicing unit. Recommended minimum requirement is 3 ft (Fig. 1).

Position unit so water from roof or eaves will not pour directly on top of unit.

Install unit on a solid, level mounting pad. Position

tie-down bolts in pad. Any 2 holes in unit base may be used to fasten unit to pad.

38GR Condensing Units Connected to Carrier-Approved

Evaporators with Carrier Accessory Tubing — 38GR units

contain correct refrigerant charge when evaporator is same size, or one size larger than condensing unit and are connected with Carrier accessory tubing. Check refrigerant

38SE,GR

SUCTION LINE CONN (ON SERVICE VALVE) LIQUID LINE

CONN.(ON SERVICE,!

VALVE)

5." |3'*

16 “ ' 8

MTG SLOTS (USE ANY 2)

uSl SPACE REQUIRED FOR SERVICE

--------------

10^

CONCRETE MOUNTING PAD^(SQUARE OR CIRCULAR)

^CONCRETE PAD SHOULD WEIGH |-| TO 2 TIMES WEIGHT OF UNIT

DIAM HOLE

FOR CONTROL WIRIN(3

Fig. 1 — Dimensions, Connections and Mounting Pad

Table 1 — Installation Data

CONDENSING UNIT

OPERATING WT (lb) DIMENSIONS

(ft-in.)

REFRIG CONN.

*38GR005,006 and 38SE004,045,055 supplied with 3/4-in to 1 1 /8-in suction valve connection adapter (field installed) for 1 1 /8-in suction

line (field supplied)

Diam A Height В Suet ODF Liq ODF

002

151 170 182 194 1 234

2-4

003

2-4 2-4 2-4

38GR

004

2-5У4

charge when tubing lengths are above 50 feet. See Refrig erant Charging for details.

38SE Condensing Units Connected to Carrier-Approved

Evaporators — 38SE units contain correct system refrig

erant charge when evaporator is same size as condensing unit, and they are connected with 25 ft or less of field-supplied tubing of recommended size (see Piping Connections) or 50 ft or less of Carrier accessory tubing. Check refrigerant charge for maximum system efficiency. See Refrigerant Charging for details.

38GR,SE Condensing Units Connected to Non-Carrier

Evaporators — Check refrigerant charge when the 38GR,SE

is added to a system in which other than a Carrier approved evaporator is being used or where the evaporator has been previously installed. Field-supplied refrigerant piping must be in accordance with Refrigerant Piping Data table.

Use an evaporator coil with a bleed-type expansion

device. If coil does not have a bleed-type expansion device it may be necessary to add an accessory start capacitor and relay to condensing unit. This would require removing compressor start thermistor (PTC device) on units so equipped.

PIPING CONNECTIONS

The 38GR,SE condensing units can be connected to

evaporator sections using Carrier accessory tubing package or field-supplied tubing of refrigerant grade (Accessory

045

'A ’/4*

005

2-8 2-8

006

260

3/*

002

176 180

2-4

003 004

2-4 2-8 3-8 3-8

У4 У4 *

38SE

192

2-5У4

045 055

248

255

3/*-

Fornn 38SE-3SI

tubing not available for 38GR006.) See Table 2 for accessory tubing sizes and Table 3 for recommended field-supplied tubing sizes. (Where evaporator is 20 ft or more below condensing unit, reduce liquid line size one diameter — min 1/4-in. OD.)

A capacity reduction results if accessory tubing is used in 38SE004,045,055 systems. For example, when a 25 ft accessory tubing package is used, there is a capacity reduction of 2 1/2% on 38SE004, 3 3/4% on 38SE045 and 5% on 38SE055 systems. For maximum capacity from these systems, use tubing sizes shown in Table 3.

Connection Recommendations — Do not use damaged or

contaminated tubing. Do not use less than 10 ft of liquid line. Do not cut 5/16-in or 1/4-in. liquid line. Bend or coil to fit.

If accessory tubing package or evaporator section has been open for more than 15 seconds per connection, evacuate or purge evaporator coil and tubing system (use field-supplied refrigerant, not unit refrigerant) Always evacuate or purge if field-supplied tubing is used.

When making piping connections, be sure to provide

clearance at unit for electrical connections.

Connect refrigerant liquid and suction lines to condensing

unit (Fig 1). Unit compatible fittings permit mechanical (quick-connect) or sweat connections.

Table 2 — Accessories

PART NO.

HH01AD040 HH93AZ040

HH51AR001

HH07AT070, HH07AT074 HH93AZ076

HH01AD042 HH93AZ042

HH01YA092 HH93YZ094

32LT900301

Low-Voltage Control — Honeywell Deluxe Thermostat Thermostat Subbase

Comfort Control Center (Use with HH01AD040.)

Low-Voltage Control — Honeywell Thermostat Thermostat Subbase (with Automatic Changeover)

Low-Voltage Control — Honeywell Thermostat Thermostat Subbase

Low-Voltage Control — Grayson Thermostat Thermostat Subbase

Solid State Head Pressure Control, and/or motor required.

38GR005,006; 38SE004.045.055 Units - When using

1 1/8-in. field-supplied siictlSff'line, remove suction line adapter taped to compressor suction line. Connect 3/4-in. end of adapter to unit suction line compatible fitting. Sweat connect refrigerant suction line to 1 1/8-in. end of adapter. Connect liquid refrigerant line to unit. When a 7/8-in. field-supplied suction line is used on 38SE003 or 38GR045, a field-supplied 3/4-in. to 7/8-in. suction line adapter must be provided.

MECHANICAL CONNECTION (Mate one set of connec tions at a time.)

1. Loosen nut on compatible fitting one turn. Do not remove.

2. Remove plug and be sure 0-ring is in the groove inside the compatible fitting.

3. Cut tubing to correct length.

4. Use gage on tag attached to service valve to mark tube end for correct insertion depth. Insert tube into com patible fitting until it bottoms. (Tube should be inserted at least as far as mark on tubing.)

5. Tighten nut until it bottoms on back coupling flange

SWEAT CONNECTION (Use refrigerant grade tubing.)

1. Remove locking nut, rubber 0-ring and Schrader core from valve.

2. Cut tubing to correct length.

DESCRIPTION

Special field-installed fan

38GC900-152 38GB900021

38GC900031 38GC900041 18 38GS900221 25 38GC900061 35 38GC900191

38GC900071 10

38GC900081 38GC900091 38GC900101

38GC900in

Indoor Fan Relay (Six — 38BA400693) Thermal Expansion Valve (Six — EA61DC100)

Len gth

(ft)

UNIT

Motor No.

Fan No.

UNIT

Motor No.

(in.)

18 25 35 50 Ve

TUBING PACKAGES

L iquid Suction*

Tube End

(in.)

Ve Ve

Vie

Ve Ve

Ve Ve Vet Ve Ve Ve Ve Ve

Ve Ve

38SE002,003

HC38VE851 LA01AA020

38GR002,003,004,045

HC38VE851

(in.)

Ve Ve

Ve Ve Ve

Evap

Vet Vet Ve Vet Vet

Ve Ve Ve

Ve Ve

Tube End

OD (in.)

Cond

Ve Ve

HC40VL701 LA01AA023

38GR005,006

HC40VL701

38SE002, 38GR002

38SE003,004,045,055 38GR003,004,045,005

Ve :

*Suction line is insulated and has a 90 bend at one end fFor 5/8-in evaporator connection, cut off 3/4-in. end.

NOTE: Do not cut 3/8-in OD liquid line to a length shorter than 10 feet Do not cut 5/1 6-or 1/4-in liquid line.

38SE004

UNIT

Table 3 — Field-Supplied Piping Data

COND

UNIT

38GR002

38GR003

38GR004

38GR045

38GR005

38GR006

38SE002

38SE003

38SE004

38SE045

38SE055

REFRIG

CONTROL

TXV 90 90

Cap. Tube or AccuRater'*'^

TXV

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

TXV 90

Cap. Tube or

AccuRater

TXV 90 90

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

TXV 90

Cap. Tube or

AccuRater

TXV

Cap. Tube or

AccuRater

Cap. Tube — Capillary Tube TXV — Thermal Expansion Valve

MAX COND

UNIT HT (ft)

Above

Evap

150

150 50

90 90

150

ISO 50

150 50

90 90

150

150 50

90 90

150 50

150

90 90

150 50

NOTES: 1 Systems with over 50 ft separation between condensing unit and evaporator require refrigerant

2 Reduce liquid line diameter by 1/8-in OD (minimum 1/4-in OD) when evaporator is 20 ft or

REFRIGERANT LINE LENGTH (ft)

25-50

Below

Evap

charge adjustment to ensure the proper superheat at compressor See Refrigerant Charging, page

5 Oil charge adjustment may also be required

Suet

^4 %

IVs

iVs

IVa

IVs

iVa

Liq

% V4

Suet

51-75 76-100

Line Diameter (in. OD)

Suet Liq

Liq

Vs V4

V4 Vs V4

V4 Vs Vs

IVs

Vs Vs

IVs

Vs V.

IVs

IVs Vs

IVs

Vs V4

Vs Vs V2

101-125

Suet Liq

IVs

/8 Vs

IVs

126-150

Suet

V4 Vs

V, Vs

IVs

Vs Vs

IVs

Liq

more below condensing unit

3. Insert tube into compatible fitting. Wrap top and bottom of service valves in wet cloth to prevent damage by heat. Solder with low-temperature (450 F) silver alloy solder.

4. Replace Schrader core.

5. Evacuate or purge system with field-supplied refrigerant.

SERVICE DOOR

Service door can be opened or removed for wiring or

servicing unit

Remove 3 screws from left side of service door (Fig. 1)

to swing door open.

Door Removal — Turn power off. Disconnect wiring from

control panel mounted on door. Refer to Fig. 7 and 8. After wiring is disconnected, lift door from roll pin hinges.

ELECTRICAL DATA AND WIRING

Field wiring must comply with local and national fire, safety and electrical codes. Voltage to unit must be within ± 10% of voltage indicated on nameplate. On 3-phase units, phases must be balanced within 2%. Contact local power company for correction of improper line voltage.

See Table 4 for recommended wire and fuse sizes. When making electric connections, provide clearance at unit for refrigerant piping connections.

Table 4 — Electrical Data

COND

UNIT

V/PH

OPER VOLTS*

COMPR

LRA FLA

Max Min

38GR002---

38GR0023I0

38GR003---

38GR003310

38GR004---

230/1 253 207

38GR0043J0

38GR045---

38GR005---

38GR006---

38GR003---

38GR0034Í0

38GR004---

38GR0044J0 200/3

38GR045---

220 180

72.0

90.0

100.0 100 0

94.0

106.0

135.0

60.0

70.0

69.0 80 0

79.0

38GR005--- 87.0 38GR006---

38GR003---

38GR0035Í0

113.0 24.0

50.0

60.0

38GR004--- 60.0

38GR0045J0 230/3

38GR045--38GR005---

38GR006--38GR004---

38GR004610

38GR045---

460/3

38GR005--38GR006---

38SE002--. 38SE003--38SE004---

230/1

38SE045---

38SE055---

253

506

253

207 70.0

414

207

67.0

70.0

98.0

30.0

35.0

35 0

35.0

49.0

65.0

72.0

90.0

94.0

106.0

Corresponding wire sizes and wire lengths

FLA — Full Load Amps

LRA — Locked Rotor Amps

--------Electrical data shown applicable to all units for which com plete model numbers are not shown Example: 38GR003--applies to all 003 models except 38GR003Ji0.

FAN BRANCH CIRCUIT

Wire

FLA

Sizet

(AWG)

14.8

14.8 1 0 12

19.2

22.9 1 3 22 9

23.9 1.3

27.9 2.0 8 42 0 Í

39.0 2.0 6

13.0

13.0 14 0 14 0

16.7 1.3 12

18.3 2.0

11.5

12.6

12.6 14 3

16.4

19.9

6.5

7.2 8 8

10 4

10.3

14.8 19 2 23 9

28.0

1.0 12 32.0 30

1.1 10 39 0 40

1.1

1 3

1.1 1 1 12

1.3 12

1.3

2 0

1 1 1 1 12

1.3 1 3 12

1 3 2 0 10 2 0 10 47 0

5 5

1.3

1.3 .8

.8 .8

1 3

2.2

1. ' 32 0 30

10 10 10

8 49.0

12 42.0

12 1.'^ zL.

12 25

mf.

12 42 0

\-xi:

14 14

i n ;

1 n

14 14

12 10 10

10 »

39.0 L 40

33.0 33-0

47.0

42.0

39.0

39.0 i: ' 30 33 0 i

46.0 40

64.0 / 50

52.0 1

47.0

56.0 35

110.0

100.0 1

81.0 Í

70.{'

29 1 '■

40.0

*Permissible limits of the voltage range at which the unit will oper

ate satisfactorily

tCopper wire sizes and lengths Use latest National Electrical Code

(NEC) for aluminum wire sizing

-> Maximum dual element fuse size NOTE Control circuit voltage is 24 volts on all units On 3-phase units, phases must be balanced within 2%

Max Ftt Wire

32 0 $XÙ

32 0 SBJB

430

Fuse Ampst

50 50 50 60 80

30 30 30

15 15 15 20 20

20 30 40

50 60

3-PHASE CONN.TO FUSED DISCONNECT

I-PHASE CONN TO FUSED DISCONNECT

— GROUND LEAD-

—

-----------------

■

---------------

--------

COND UNIT

GROUNDING LUG

BRN _

ORN

-----------

BLK

-----------

(38GR ONLY)

A—A Splice Connections

---------

Field Wiring

---------

Factory Wiring

Fig. 2 — Line Power Connections

Install a Branch Circuit Fused Disconnect of adequate size

to handle unit starting current Locate disconnect within sight of and readily accessible to the unit, per section

440-14 of National Electrical Code (NEC).

1076

Bring Line Power Leads Into Unit — Extend leads from

fused disconnect thru hole provided in base pan (Fig. 1) and into unit junction box.

CONNECT GROUND LEAD TO GROUND LUG OR SCREW IN JUNCTION BOX for safety. Connect power wiring. See Fig. 2. Splice line power leads to brown and orange pigtails on 1-phase units or brown, orange and black pigtails on 3-phase units. Use wire nuts supplied with unit. Tape each connection. When aluminum field wire is used, lubricate splices with splice compound (also supplied) before using wire nuts.

Control Power (24 v) wiring is brought thru hole provided

in unit base pan (Fig. 1) and into low-voltage section of unit junction box. Splice control leads to yellow pigtails on control relay. See Fig. 3. For aluminum wire splices use

factory supplied and lubricated wire nuts. Furnace or fan

coil transformer must be used as 24-v supply for system as shown in Fig. 3. All 38SE units are equipped with transformer used to power contactor thru unit control circuit only, and must not be used to power thermostat circuit.

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