Carrier 38GS User Manual

0 (0)

Number One Airconditioning Mater

Syracuse New York

Air-Cooled Condensing Units

g DIAM KOS FOR CONTROL WIRING

SUCTION LINE CONN

SUCTION LINE VALVE

4'-0" OVERHEAD SPACE REQ'D FOR SERVICE AND AIR FLOW

3 -0 (BOTH SIDES)

LIQUID LINE VALVE

LIQUID LINE CONN

CONCRETE

MOUNTING

TRANSPORTATION DAMAGE

File claim with shipping company if shipment is

damaged or incomplete.

Unpackaging Unit — Move condensing unit to final

location. Open carton at end marked “compressor end.” Slide unit from carton taking special care to not damage service valves or grilles.

PRELIMINARY SURVEY

Consult local building codes and National Electrical Code (NEC) for special installation requirements.

When installing unit, allow sufficient space for air flow clearance, wiring, refrigerant piping and servicing unit. Position unit so water from roof or eaves does not flow directly on top of unit.

Install unit on a solid, level mounting pad. Unit can be attached to pad with a mastic adhesive or

by drilling holes in base pan for 1/4-in. mounting bolts. Do not block base pan water drainage holes.

38GS,CC,CE Condensing Units Connected to Carrier Matched Evaporators with Carrier Acces

sory Tubing — Check system refrigerant charge

when tubing lengths are above or below 25 feet. See Refrigerant Charging (page 10) for details.

Fig. 1 — Dimensions, Connections and Mounting Pad

38GS,CC,CE Unit

Table 1 — Installation Data

38GS

014

COND UNIT 38CC

OPER WT (lb) 130 135 UNIT DIM. (ft-in.)

Length A

Width B

Height G

REFRIG CONN.(in.)

Suction (ODF)

Liquid (ODF)

*5/8-in suction connection on 38CE002

t38CE045,005 and 38GS.CC060 are factory supplied with 3/4- to

1 1/8-in suction valve adapter (field installed) for 1 1/8-in

suction line

38CB

- - -

'l-4

% lYsT '/b I

018

1-4

024

142|149

Com

036 042

030 030 036 002* 003 004 045 005

158 191

2-10V4

1-10

1-4 1 1-4 (2-0

DOtible Fittings

048 060t

042 048 060t

193 200

----

2-0 2-0

-----

'/4t

38GS,CC,CE Condensing Units Connected to NonCarrier Evaporators — Check refrigerant charge

when condensing unit 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 pip ing must be in accordance with Field-Supplied Piping Data, Table 3.

Where indicated on Table 3 for 38GS,CE units,

install a liquid line filter-drier and accessory crank case heater on condensing unit. (Filter-drier is factory supplied on CE045,005 units.) Accessory start capacitor and relay also required on 38GS

units, but not normally required on 38CE units.

See Compressor Service (page 7). All above items are standard or not required for 38CC units.

Use an evaporator coil with a bleed-type ex pansion 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.

Form 38GS-13SI

Table 2 — Accessories

PART

NUMBER

HH01AD040 HH93AZ040

JHH51AR00J[^

HH07AT070, HH07AT074 H N93^076

HH0iAD042”

HH93AZ042 HH01YA092

HH_93_YZ094 32LT900301

(200-3 Ph) 32LT900601 (460-3 Ph)

38GS900102 38GS900212

38GS900112 38GS900292

38GS900172 38GS900182

38GC900031 10 38GC900071 10 38GC900041 38GC900081 38GS900221 38GC900091 38GC900061 35

38GC900101 38GC900191 50 % 38GC900ni

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

Indoor Fan Relays (^¡x HN61KJ210)

40VA Low-Voltage Control Transformers (24 V - Six 38GS900Q9])

Crankcase Heaters (Six 38GS900131)

Crankcase Heaters (Six 38GS900281) Start Capacitor and Relay Package (Six 38GS900041) Start Capacitor

Tubing Pa

Liqui d

Lgth

(ft)

18 18 25 25

(in.)

r 5/^

% % % : %

Tube End

OD (in.)

DESCRIPTION

and Relay F^ackage (Six 38GS900051

ckages

Suction*

(in.)

^8 ^8

y« , % %

T ubeODFnd

in.)

Evap

^8 % 1 % % ^8 %

I V4t

Cond

^41 I

%t % % ^/4 %t

y —

/4 k4

38CC — (Fan motor suitable for 32LT)

38GS

014,018,024

3/ H

030,036,042,048

014,018,024

030,036,042,048 014,018,024 030,036,042,048 014,018,024

=/8

030,036,042,048

014,018,024 -

030,036,042,048

USAGE

38GS,CC,CE

38GS,CC,CE 38GS,CC,CE

38GS (except 38G5014), 38CE

38GS0Ì4

38GS (except 38GSÒ42), 38CE

38GS042

UNIT

38CC

030,036,042,048

38CE

002

003,004,045,005

002

003,004,045,005

002

“0Ü3%O470457O0r^

002 003,004,045,005 002 003,004,045,005

*AII suction lines have a 90° bend at one end

tForb/8-in evaporator connection, cut off 3/4-in end

PIPING CONNECTIONS

Condensing units can be connected to evap orator sections using Carrier accessory tubing package or field-supplied tubing of refrigerant grade. (Accessory tubing not available for 38GS060, 38CC060.) See Table 2 for accessory tubing sizes and Table 3 for recommended fieldsupplied 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 will result if accessory tubing is used in 38CE045,005 systems. For example, when a 25 ft accessory tubing package is used, there will be a capacity reduction of 3 3/4% on 38CE045 and 5% on 38CE005 systems. For maximum capacity from these systems, use tubing sizes shown in Table 3.

When other than 25 ft of interconnecting tubing is used, follow special requirements de scribed in Refrigerant Charging. 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.

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

Before Connecting Unit Piping, consider the

following: 38CE045,005 AND 38CC UNITS - A filter-drier package is shipped with these units. Included with

filter-drier are 2 short length tubing assemblies that are equipped with flare and/or Compatible Fit

tings. Use tubing assemblies to install filter-drier into system liquid line at evaporator or condensing unit. See Fig. 2. Connect tubing assembly A (90°

assembly) to evaporator or condensing unit liquid line Compatible Fitting. Complete the filter-drier installation as shown.

Table 3 — Field-Supplied Piping Data

MAX COND

COND

X-

f 3 UNIT

38GS014, 38GS018

38GS024

38GS030, 38CC030, 38CE002

38GS036, 38CC036, 38CE003

38GS042, 38CC042, 38CE004

38GS048,

38CC048

38CE045

38GS06 0, 38CC060, 38CE005

Cap. Tube TXV

NOTES

REFRIG

CONTROL

TXV

Cap. Tube

AccuRater'*'^

TXV

Cap. Tube

AccuRater

Cap. Tube

AccuRater

TXV

Cap. Tube

AccuRater

TXV

Cap Tube

AccuRater

TXV

Cap Tube

AccuRater

TXV

Cap. Tube

AccuRater

L^y

Cap. Tube

AccuRater

Crankcase heater and liquid line filter-drier required on 38GS and 38CE units Accessory start capacitor

with relay also required on 38GS unit, but not

normally required on 38CE units See Compressor Service Reduce liquid line diameter by 1/8-in OD

(min 1/4-in OD) when evaporator is 20 ft or more

below condensing unit

■ Capillary Tube

- Thermal Expansion Valve

1 The following system modifications are required adjust

refrigerant charge on systems with over 25 ft separation

UNIT HT (ft)

Above

Evap

150

90 ■

150

Be low

Evap

90 50 %

25- 50 51» 7S 7&~ 1

Suet Liq

'8 V» 'x iiiiii lili

IV»

V» T

V»

% liM

% Iliiii

V»

REFRIGERANT LINE LENGTH (ft)

Line Diameter (in* OD)

IIBI

ilM

iiiiiiiiiii

wmmmmmmm

N s

T %

between condensing unit and evaporator (See Refrigerant Charging ) Adjust system oil charge as described in Note 2 Oil charge adjustment add 1% of nominal oil charge in system (Table 7) for each 10 ft of refrigerant line length above 50 feet Eor example, a system that has a 50-oz oil charge with 1 50 ft of interconnecting piping requires 5 oz of additional oil as shown below:

iÄiii

ISl

150 ft - 50 ft = 100 ft 100 ft -E 10 ft = 10 ft

Litj 1 LEíj

iiiiii

■

ilBi %

■

11»

Äiii

10x1% = 10% ( 10)

10 X 50 oz = 5 oz

Do not permit condensing unit to short cycle, particularly on applications with long vertical line lengths Correct short cycling condition immediately

¡Mil

Í.

..............

Connection Procedure — When making tubing

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 2 methods of refrigerant line connection; mechanical (quick connect) or sweat connection. Make suction line connection first.

38CE045,005, 38GS060 AND 38CC060 UNITS 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.

MECHANICAL CONNECTION (Mate one set of connections at a time.)

1. Loosen nut on Compatible Fitting one turn. Do not remove. Remove plug and be sure 0-ring is in the groove

inside the Compatible Fitting. Cut tubing to correct length.

3. Use gage on tag attached to service valve to

4. mark tube end for correct insertion depth. Insert tube into Compatible Fitting until it

bottoms. (Tube should be inserted at least as far as mark on tubing.)

Tighten nut until it bottoms on back coupling

5. flange.

Fig. 2 — Filter-Drier Assembly Installation (38CC, 38CE045 and 005)

SWEAT CONNECTION (Use refrigerant grade

tubing.)

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

2. Cut tubing to correct length.

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.

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. Contact local power company for correction of improper line voltage.

of ifolt ois tmpro|>er Ime

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

Install a Branch Circuit Fused Disconnect of

adequate size to handle unit starting current. Locate disconnect within sight of and readily accessible from the unit, per section 440-14 of

National Electrical Code (NEC).

Bring Line Power Leads Into Unit — Extend leads

from fused disconnect thru hole provided in service embossment (Fig. 1) and thru 7/8-in. hole into control box.

Connect Ground Lead to a Ground Lug in Control

Box for safety. Connect power wiring. See Fig. 3.

Splice line power leads to red and violet pigtails on 38GS,CE units or to yellow pigtails (3) on 38CC

units. Use wire nuts supplied with unit. Tape each

connection. Wire nuts are suitable for copper or aluminum wire since they contain joint compound.

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

service embossment and spliced to yellow pigtails on all units. See Fig. 4.

Furnace or fan-coil transformer must be used as

24-v supply for system as shown in Fig. 4 (At least

a 40-va transformer is recommended.) Current 38GS048,060 and 38CC048,060 units are equip ped with a low-voltage transformer used to power contactor thru unit control circuit. This trans former must not be used for powering the indoor thermostat control circuit.

I-PHASE CONN. TO FUSED DISCONNECT

3-PHASE

CONN. TO

FUSED

DISCONNECT

SPLICE

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

FACTORY WIRING

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

FIELD WIRING

—

--I3D GROUND LUG 386S,CEC0NDUNIT

-YEL-

-------I3D GROUND LUG

38CC CONO UNIT

Fig. 3 — Line Power Connections

THERMOSTAT SUBBASE

THERMOSTAT SUBBASE HH93AZ076

(COOLING ONLY)

THERMOSTAT SUBBASE HH93AZ042 OR

ONE TRANSFORMER

(COOLING AND ONE-STAGE HEATING)

^CONNECT FS TO LOW-SPEED INDOOR FAN TERMINAL

WHEN 2-SPEED FAN IS USED

IFR, FS and IFM are located in furnace on heating-cooling applications If accessory IFR is required for cooling only applications, locate (IFR) in fan coiI

ARRANGEMENT C-

ONE TRANSFORMER

(COOLING AND 2-STAGE HEATING)

^CONNECT FS TO LOW-SPEED INDOOR FAN TERMINAL

WHEN 2-SPEED FAN IS USED

Fig. 4 -- Control Circuit Connections

Control Relay (10 va) or Contactor Fan Switch Heating Control I ndoor Fan Motor I ndoor Fan Relay Transformer

Field Splice

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

Field Wiring

---------------- Factory Wiring

+ 11 hidden pages