Carrier 38AK007 User Manual

38AK007

HEATING & COOLING

Installation, Start-Up and Service

Instructions

SAFETY COIMSIDERATIONS

Installing and servicing air-conditioning equipment can be hazardous due to system pressure and electrical compo nents. Only trained and qualified service personnel should install or service air-conditioning equipment.

When working on air-conditioning equipment, observe precautions in literature and on tags and labels attached to unit.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thor

oughly. Consult local building codes and National Electri

cal Code (NEC) for special installation requirements.

A WARNING

Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch. Electrical shock can cause personal injury.

Air-Cooled Condensing Unit

INSTALLATION

Step 1 — Complete Pre-Installation Checks

UNCRATE UNIT — Remove unit packaging except for the top skid assembly and wood bumpers, which should be left in place until after unit is rigged into place.

INSPECT SHIPMENT — File claim with shipping com pany if shipment is damaged or incomplete.

CONSIDER SYSTEM REQUIREMENTS

• Consult local building codes and NEC for special instal lation requirements.

• Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing unit. See Eig. 1 and Table 1.

• Locate unit so that condenser airflow is unrestricted on all sides and above. Refer to Fig. 1.

• Unit may be mounted on a level pad directly on base rails or mounted on raised pads at support points. See Table 2 for weight distribution based on recommended support points.

NOTE: If vibration isolators are required for a particular in stallation, use data in Table 2 to make proper selection.

Table 1 — Physical Data

UNIT 38AK OPER WEIGHT (lb) REFRIGERANT* COMPRESSOR

on (oz) 65

CONDENSER AIR FAN

Number...Rpm 60 Hz Diameter (in.)

Motor Hp (NEMA) Nominal Cfm Total

CONDENSER COIL

Face Area (sq ft) Storage Capacity (lb)t

CONNECTIONS (sweat)

Suction (in.) Liquid (In.)

CONTROLS

Pressurestat Settings

High Cutout Low Cutout

FUSIBLE PLUG 200 F

‘Unit is factory supplied with holding charge only. fStorage capacity of condenser coil with coil 80% full of liquid R-22

at 124 F

50 Hz

Cut-in Cut-in

Propeller; Direct Drive

007

340

1.. .850

1.. 708

3800

12 24

11.264

1V8

426 ± 7 psig

320 ± 20 psig

7 ± 3 psig

22 ± 5 psig

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book|1 |4 PC 111 Catalog No 633-809 Printed in U.S A Form 38AK-2SI Pg 1 6-92 Replaces: New Tab 3a 2a

Table 2 — Weight Distribution

STD. UNIT

UNIT

38AK007

UNIT

38AK007 77

WEIGHT

lbs.

340

CORNER WEIGHT

lbs.

CORNER WEIGHT

lbs.

kg.

154

(C)

kg.

(A)

CORNER WEIGHT

kg. lbs.

39 53

CORNER WEIGHT

(D)

lbs. kg.

124 56

(B)

kg.

REFRIGERANT PIPING SIZES

EQUIVALENT LENGTH OF PIPING - FT

IVe V2

76-100

IVs

COND

UNIT

38AK007

L — Liquid Line S — Suction Line

NOTES:

1. Pipe sizes are based on a 2° F loss for liquid and suction lines

2. Pipe sizes are based on an equivalent length equal to the max imum length of interconnecting piping plus 50 percent for fittings.

3. Charge units with R-22 in accordance with unit installation instructions.

0-25 26-50 51-75

Line Size (in. OD)

V2 IVs

L s L s L

IVa

SIZE REFRIGERANT LINES - Consider length of pip ing required between condensing unit and evaporator, amount of liquid lift, and compressor oil return. See Table 3 and also refer to Part 3 of Carrier System Design Manual for design details and line sizing. Refer to evaporator installa tion instructions for additional information.

INSTALL FILTER DRIER AND MOISTURE INDICA TOR — The filter drier is factory supplied and field in stalled. Moisture indicator is a field-installed option and should be installed just after liquid line shutoff valve. Do not use a

receiver; there is none provided with unit and one should

not be used. NOTE: Unit is shipped with R-22 holding charge. System

pressure must be relieved before removing caps.

Pass nitrogen or other inert gas through piping while braz

ing to prevent formation of copper oxide.

Install field-supplied thermostatic expansion valve to evap orator section. It is recommended that a field supplied liq uid line solenoid be positioned in the main liquid line close to the evaporator coil, and wired to close when compressor

stops to minimize refrigerant migration during the “OFF” cycle.

Step 2 - Rig and Mount the Unit

ik CAUtlON

Be sure unit panels are securely in place prior to rigging.

RIGGING — These units are designed for overhead rig ging. Refer to rigging label for preferred rigging method. Spreader bars are not required if top crating is left on unit. All panels must be in place when rigging. (See Fig. 2) As further protection for coil faces, plywood sheets may be placed against sides of unit, behind cables. Run cables to a central suspension point so that angle from the horizontal is not less than 45 degrees. Raise and set unit down carefully.

If it is necessary to roll unit into position, mount unit on

rails, using a minimum of 3 rollers. Apply force to rails,

not unit. If unit is to be skidded into position, place it on a

large pad and drag it by the pad. Do not apply any force to

unit.

Raise from above to lift unit from rails or pad when unit

is in final position.

After unit is in position, remove all shipping wrapping

and top crating.

Step 3 — Complete Refrigerant Piping Connec tions — Suction connection is 1-1/8-in. sweat with plas

tic cap; liquid connection is 1/2-in. sweat with plastic cap. Follow standard piping practices.

Table 3 — Liquid Line Data

MAX

UNIT 38AK007

60 Hz 50 Hz

NOTE: Values shown are for units operating at 45 F saturated suc tion and 95 F entering air

ALLOWABLE

LIQUID

LIFT (ft)

86 7 72

Max Allowable Pressure Drop

LIQUID LINE

(psi)

Max Allowable

Temp Loss

(F)

2 2

Step 4 — Make Electrical Connections

A WARNING

Unit cabinet must have an uninterrupted, unbroken elec

trical ground to minimize the possibility of personal in

jury if an electrical fault should occur. This ground may

consist of electrical wire connected to unit ground lug

in control compartment, or conduit approved for elec

trical ground when installed in accordance with NEC

ANSI (American National Standards Institute)/NFPA

(National Fire Protection Association) 70-1987 and lo

cal electrical codes. Failure to follow this warning could

result in the installer being liable for personal injury of

others.

NOTES:

1. Dimensions in are in miiiimeters.

Center of gravity.

3 4 Minimum ciearance (locai codes or jurisdiction may

5. With the exception of the clearance for the condenser

6 Units may be installed on combustible floors made from

Direction of air fiow.

prevaii): a Bottom to combustibie surfaces 0 in. b Condenser coil, for proper air flow, 36 in. one side,

12 in the other The side getting the greater ciear

ance is optionai

c Overhead, 60 in to assure proper condenser fan op

eration.

d Between units, controi box side, 42 in per NEC. e Between unit and ungrounded surfaces, control box

side, 36 in per NEC

f Between unit and block or concrete walls and other

grounded surfaces, control box side, 42 in per NEC

coil as stated in notes 5a, b, and c, a removable fence or barricade requires no clearance

wood or class A, B, or C roof covering material

A 1%” DIA. [35] FIELD POWER SUPPLY HOLE

CONNECTION SIZES

B 2” DIA. [51] POWER SUPPLY KNOCK-OUT

c 2V2'’ dia [64] POWER SUPPLY KNOCK-OUT

Ve" DIA [22] FIELD CONTROL WIRING HOLE

rxp ÍKMSr

► -0'-2 9/16

LEFT SIDE

-3’-S 3/IS"

Fig. 1 -

FORIC TRUX SLOTS

<3 SlOeS ÚM.W

u 3'-3 1/2'

0003}

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

FRONT

Dimensions (ft-in.)

0*-2 Ì/4'DJA Í57J

(TYP 0 PLACES)

RIGHT SIDE

Fig. 2 - Rigging Label

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