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38AKS028-044 Air-Cooled Condensing Units 50/60 Hz

Wiring Diagrams

(Including Accessories) 028-044 (50/60 Hz)

WIRING DIAGRAM INDEX

UNIT 38AKS ELECTRICAL CHARACTERISTICS (V-Ph-Hz) 208/230-3-60 460-3-60 575-3-60 230-3-50 346-3-50 380-3-60 400-3-50 SCHEMATIC DIAGRAM FIG. 1 COMPONENT ARRANGEMENT FIG. 2 LABEL DIAGRAM NO. 38AK501477

028-044

3

4

38AK501475

Typical Field Wiring -- Electronic Programmable Thermostat, Liquid Line Solenoid Valves, and Power . . . . . . . . . . . . . . . . Fig. 5 Time Delay Relay Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fig. 6 Hot Gas Bypass Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fig. 7 Motormaster Head Pressure Control Wiring . . . . . . . . Fig. 10,11,12 NOTE: Italics denote 60 Hz export units (not for sale in USA).

SAFETY CONSIDERATIONS

! ! " " " " # ! $ ! $ <6<*%8* '5*= 54>48:

4 3' ( *+ ! % *+ % *+ % , % *+ 53' 53' *+ ! % *+ % 53' *+ % , 63' *+

OPERATION

+38%4;%? 7 ! () % & ' # ( ) % *+ , -./ 012, % *+ % 3' (

Bypass Relay (BPR) -- 4

738 & ' # ( ) % 738 ( 63' % 738 &

Control Module (CM) --

Time-Delay Relay (TDR) (Standard on 230, 346-3-50) -- % !

9 % 9 :3 ; :3 ## *8 *9 4 9 *94

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No. 533-839 Printed in U.S.A. Form 38AKS-1W Pg 1 7-00 Replaces: New Book 1 Tab 3a

9 *+ @ -(019 9 4 @ % ! (A/ 92.( !3 # @ @B4='/)) B/ # (A2 * 4 9 ( ! ( % % 738 63' 63' ( 63' (

Sequence of Operation --

, *+ & 4 *+ % C 738 % % ! % *+ & , : D<;<846 E # 9 , % /A< /A< 4 /A< @ (/B0(@/ )// )A/ : ,2, )A/ : )A/

LEGEND (Fig. 1-5)

AFS ATS BPR C CB CH CM CMR COMP CR EQUIP FC FCPS FM FU GND HPS IFC LLSV LPS NEC -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Airflow Switch Air Temperature Switch Bypass Relay Contactor, Compressor Circuit Breaker Crankcase Heater Control Module Control Module Relay Compressor Control Relay Equipment Fan Contactor Fan Cycling Pressure Switch Fan Motor Fuse Ground High-Pressure Switch Indoor Fan Contactor Liquid Line Solenoid Valve Low-Pressure Switch National Electrical Code OPS TB TC TDR TRAN -- -- -- -- -- Oil Pressure Switch Terminal Block Thermostat, Cooling Time-Delay Relay Transformer Terminal Block Connection Marked Terminal Unmarked Terminal Marked Splice Unmarked Splice Factory Wiring Field Control Wiring Field Power Wiring Indicates common potential. (Does not represent wiring.)

(

Fig. 1 -- Wiring Schematic -- 38AKS 208/230-3-60, 460-3-60, 575-3-60

@

Fig. 2 -- Component Arrangement -- 38AKS 208/230-3-60, 460-3-60, 575-3-60

NOTES FOR FIG. 1 AND 2

1. Connect TRAN2 to terminal H3 for 230V, H4 for 460V, and H2 for 575V units. If 208/230V units are run with a 208V power supply connect to terminal H2. 2. Connect TRAN1 to ORN lead for 230V, BLK lead for 460V, and WHT lead for 575V units. 3. Compressor & fan motors thermally protected. Three-phase motors protected against primary single phasing conditions. 4. Replacement of original wires must be with Type 90° C wire or its equivalent. 5. Line # indicates location of contacts, #,# signifies single-pole double-throw contacts, # signifies a normally closed contact, # signifies a normally open contact. 6. Factory wiring is in accordance with National Electrical Code (NEC). Field modifications or additions must be in compliance with all applicable codes. 7. Wiring for field power supply must be rated 60° C. Use copper, copper-clad aluminum or aluminum conductors. 8. Terminals G/6, Y2/3 & C/7 of TB3 are for class 2 (24V) field external interlock connections. Class 1 field interlock contacts must have minimum rating of 180 VA, 220V, 50/60 Hz pilot duty. Class 2 field interlock contacts must have minimum rating of 70 VA, 24V, 50/60 Hz pilot duty. 9. Thermostat for standard units: HH01AD042, HH07AT172 & HH07AT174. Subbase: HH93AZ042, HH93AZ176 & HH93AZ180. Thermostat for BDP units: P272-2783 Subbase: P272-1883 & P272-1882. 10. Control module internal illustrated to indicate components orientational sequence. All items illustrated are theoretically represented as internal to component. 11. The factory-supplied LLSV drop control is shipped with the 38AKS unit but field installed at the indoor unit.

)

Fig. 3 -- Wiring Schematic -- 38AKS 230-3-50, 346-3-50, 380-3-60, 400-3-50

,

Fig. 4 -- Component Arrangement -- 38AKS 230-3-50, 346-3-50, 380-3-60, 400-3-50

NOTES FOR FIG. 3 AND 4

1. 2. 3. 4. 5. 6. 7. 8. Connect to TRAN1 240V terminal for 400 and 230V units, 200V terminal for 346V units or ORN lead for 380V units. Compressor & fan motors thermally protected. Three phase motors protected against primary single phasing conditions. Replacement of original wires must be with Type 90° C wire or its equivalent. Line # indicates location of contacts, #,# signifies single-pole double-throw contacts, # signifies a normally closed contact, # signifies a normally open contact. Factory wiring is in accordance with National Electrical Code (NEC). Field modifications or additions must be in compliance with all applicable codes. Wiring for field power supply must be rated 60° C. Use copper, copper-clad aluminum or aluminum conductors. Terminals G/6, Y2/3 & C/7 of TB3 are for class 2 (24V) field external interlock connections. Class 1 field interlock contacts must have minimum rating of 180 VA, 220V, 50/60 Hz pilot duty. Class 2 field interlock contacts must have minimum rating of 70 VA, 24V, 50/60 Hz pilot duty. Thermostat: HH01AD042, HH07AT172 & HH07AT174. Subbase: HH93AZ042, HH93AZ176 & HH93AZ180. Control module internal illustrated to indicate components orientational sequence. All items illustrated are theoretically represented as internal to component. The factory-supplied LLSV drop control is shipped with the 38AKS unit but field installed at the indoor unit. On units with 380V, interchange fan motor connections 1 & 3 to ensure counter clockwise fan rotation.

9. 10. 11.

A

3. For internal unit wiring, refer to Fig. 1-4 or unit wiring label diagram. Power for TB1 and TB2 follows: TB1 POWER (V-Ph-Hz) TB2 POWER (V-Ph-Hz) 115-1-60 220-1-60 220-1-50 24-1-60 24-1-60 24-1-50 UNIT POWER (V-Ph-Hz) 208/230-3-60 460-3-60 575-3-60 380-3-60 230-3-50 346-3-50 400-3-50 4. The following components are not located in the 38AKS unit control box: LLSV1, LLSV2, field control thermostat, AFS, alarm shut-off switch, and alarm or light.

NOTES: 1. Factory wiring in accordance with the NEC. Any field modifications or additions must be in compliance with all applicable codes. 2. All field interlock contacts must have minimum rating of 180 va pilot duty plus capacity required for field-installed equipment. All field interlock contacts in the 24-v control circuit must have minimum rating of 70 va pilot duty plus capacity required for fieldinstalled equipment.

2

Fig. 5 -- Typical Field Wiring -- Electronic Arrangement Thermostat, Liquid-Line Solenoid Valves, and Power

Field-Installed Accessories --

# 8 & 348% ;:;D '%48% E 5;A2>4//9

WHT GRA C1 C1 C2 WHT WHT

;%<? 4 % ? @B/ ,2, F A/ 5 ! )A/ F A/ 5 )// F ,/ 5 ! (/B0(@/ F A/ 5 5;A2>4//9 (@/ @)A F ,/ 5

REMOVE GRA WIRE

JUMPER

C1 C1A C2

WHT

TDR

Fig. 6 -- Time Delay Relay Wiring

E 3 & %89 $ A7 (/ & 8 D84 *9 *9 *94 5;A2>4//9 *9 *9 *94 C ' # A 5% D4' 7G34'' @B4='/(B /)) A/ 5 ,/ 5 E @/D4.//9A9 99, @/D4.//929 (@/ ' # 9 9 * 3 ; 5;[email protected]() () (/ 9(, + @B4=' & ( 99, " 4 ) " " 5D8 A 8 () " " * 69 5D8 * 6( 5D8 %[email protected] * %[email protected] G( %7( @ %7( ( 5D8 ?

TB2 2

HGR 4 6

HOT GAS BYPASS SOLENOID

TB2 3

115-V CIRCUIT

FIELD CONTROL THERMOSTAT CB1 CB2 115V 24V TC1 TC2 AUTO ON R Y1 Y2 W1 W2 G C X

LLSV2

TB3

HGR

24-V CIRCUIT

CB HGR LLSV TB TC -- -- -- -- -- LEGEND Circuit Breaker Hot Gas Relay Liquid Line Solenoid Valve Terminal Board Thermostat, Cooling

3 +38%4;%? 3 ; @/D4.//9A9 929 ;% ' 0 :# & 6 4+7<;% 5<4: 38<''$8< #4; *;%86 4 (/B0(@/ @ A/ 5 )A/ @ A/ 5 ,2, @ A/ 5 E ,/:H./(B/9 (/B0(@/ @ A/ ,2, @ A/ ,/:H./(B99 )A/ @ A/

Fig. 7 -- Hot Gas Bypass Control Wiring Schematics

# + ,2, * 3 ; 5%/945B,) !

B

; A/ 5 ,/ 5 ' ,/ 5 + * 4 < 9 : &

. * (( #*9 ' # 9/ 8 %) C & * 9/ %9 ! %, C & ' # 9/ (/B0(@/ F # 99 )A/ ,2, F 99 8 %B C & * 9( 8 #+9 (@ ! #*7 (@ #*7 & %

% ! C ! % ! ( 8 #+9 9 # B & @ : #+9 C & #+9 ) 8 #+9 # ' 9A , 3 #+9 A ! #+9 ' @ 2 7 @ B + ' # 3! ' # . % ' # .

(@ #*7 % C [email protected] + + & $ ! ) $ ) 9/ % 9) * ! (9 #*9 ! + $ ' # 9/ 8 ! + 39 C & $ ' # 9/ 8 C &

Fig. 8 -- Fan Motor Locations

7 9, # )A/ ,2, ,2, 5%/945B,) ? + ' # . : * (( #*9 ' # 99 * ! (9 #*9 ' # 99 8 8 ! ' # 99 ' # .

NOTES: 1. Transformer shield is field-supplied (575v transformer part no. HT01AH854 is field-supplied). 2. Exact mounting locations on divider panel for capacitor, Motormaster controller, and transformer are at discretion of installer. There are no wires or obstructions on reverse side of divider panel to interfere with mounting screws.

Fig. 9 -- Mounting Motormaster® Control Capacitor, and 460-V or 575-V Transformer

.

BLU SENSOR RED FU1 FCI BLK YEL BLU BLK YEL 11 12 13 21 22 23 BLK YEL P1 OR PURPLE T8 OR RED T4 OR YEL MOTORMASTER CONTROLLER BLK BLK FM1

T5 OR BLACK T1 OR BLUE GRN-YEL

BLK FC2 BLU YEL 11 12 BLU BLK YEL 11 12 13 13 FC3 21 22 23 PNK VIO GRA 1 2 3 GRN-YEL FM3 (38AKS044 ONLY) 21 22 23 RED BRN ORN 1 2 3 GRN-YEL FM2

LEGEND FC -- Fan Contactor FM -- Fan Motor FU -- Fuse

BLU

Fig. 10 -- Motormaster® Controller Wiring; 38AKS 208/230-Volt Units

BLU SENSOR RED MOTORMASTER CONTROLLER BLK FCI BLK YEL BLU BLK YEL 11 12 13 21 22 23 BLK 460,575V YEL P1 OR PURPLE 230V T8 OR RED T4 OR YEL BLK FM1

T5 OR BLACK T1 OR BLUE GRN-YEL

BLK FC2 BLU YEL 11 12 BLU BLK YEL 11 12 13 13 FC3 21 22 23 PNK VIO GRA 1 2 3 GRN-YEL FM3 (38AKS044 ONLY) 21 22 23 RED BRN ORN 1 2 3 GRN-YEL FM2

BLU

LEGEND FC -- Fan Contactor FM -- Fan Motor

Fig. 11 -- Motormaster Controller Wiring; 38AKS 460 and 575-Volt Units

9/

9A 8 < ' # 9( 92 8 '

% 5

9B ' @B4='/)) $ ) )/ ' # [email protected] ' # 9) 9. * & &

(/ 3 (9 8 &

Fig. 12 -- Location of Propeller on Motor Shaft from Outside of Orifice Ring

Fig. 13 -- Sensor Installation

HEADER END 38AKS028

HEADER END 38AKS034

HEADER END 38AKS044

Fig. 14 -- Motormaster® Controller Sensor Locations on Condenser Coil Header Ends, 38AKS Units

99

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE -----------------------------------------------------------------------------------------------------------------------------------------------------------------

MOUNTING TEMPLATE FOR MOTORMASTER® CONTROL

[email protected]

Copyright 2000 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No. 533-839 Printed in U.S.A. Form 38AKS-1W Pg 16 7-00 Replaces: New Book 1 Tab 3a

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