Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 50FK, JK034-074, 48FK specifications Ð Pin Terminal Connector J2, Status Switch Inputs

Models: 48FK 50FK JK034-074

1 60

Download 60 pages 6.49 Kb

Page 4

Fig. 3 Ð Pin Terminal Connector J2

			LEGEND
		CR	Ð Control Relay
	LEGEND	EC	Ð Enthalpy Control
	LEGEND	LPS Ð Low-Pressure Switch
	T Ð Thermistor	LPS Ð Low-Pressure Switch
	T Ð Thermistor		Fig. 3 Ð Pin Terminal Connector J2
	Field Wiring		Fig. 3 Ð Pin Terminal Connector J2
	Accessory		Status Switch Inputs

Fig. 2 Ð Pin Terminal Connector J1

Thermistor Inputs

Table 2 Ð Pin Terminal Connector J2

Status Switch Inputs

	CONNECTOR J2		STATUS SWITCH	UNIT SIZE
	TERMINAL NO.		STATUS SWITCH	034-104
	TERMINAL NO.			034-104
	1,2		Oil Pressure,	Jumpered
	1,2		Circuit 2	Jumpered
			Circuit 2
	3,4		Oil Pressure,	Jumpered
	3,4		Circuit 1	Jumpered
			Circuit 1
	7,8		Loss Of Charge,	LPS2
	7,8		Circuit 2	LPS2
			Circuit 2
	9,10		Loss of Charge,	LPS1
	9,10		Circuit 1	LPS1
			Circuit 1
	13,14		Economizer	EC
	13,14		Changeover	EC
			Changeover
	15,20		Compressor Fault	CR2
	15,20		Signal	CR2
			Signal
	15,24		Compressor Fault	CR1
	15,24		Signal	CR1
			Signal
	LEGEND
CR	Ð Control Relay
EC	Ð Enthalpy Control

LPS Ð Low-Pressure Switch

NOTE: Terminal numbers 5, 6, 11, 12, 16-19, and 21-23 are not used on these units.

	LEGEND
IN	Ð Input	Factory Wiring
P	Ð Potentiometer	Field Wiring
RNT Ð Return		Accessory
SW	Ð Switch

Fig. 4 Ð Pin Terminal Connector J3

Potentiometer Inputs

4

Image 4

Carrier 50FK, JK034-074 Ð Pin Terminal Connector J2, Status Switch Inputs, Ð Pin Terminal Connector J1 Thermistor Inputs

Contents

Controls Operation and Troubleshooting 48FK,JK034-074 50FK,FY,JK,JY034-104 Variable-Air Volume Rooftop UnitsSAFETY CONSIDERATIONS CONTENTS contGENERAL Return-Air Temperature Table 1 Ð Pin Terminal Connector J1 Thermistor InputsFig. 1 Ð Processor Board Fig. 3 Ð Pin Terminal Connector J2 Status Switch InputsFig. 2 Ð Pin Terminal Connector J1 Thermistor Inputs Table 2 Ð Pin Terminal Connector J2 Status Switch InputsThe potentiometer locations and functions are as follows Table 3 Ð Output Pin and Terminal Assignments Fig. 5 Ð Relay BoardCompressor Operation Fig. 8 Ð Thermistor T1 Location, 50FK,JK034-048 Units GAS SECTIONHORIZONTAL SUPPLY SECTION 48FK,JK ONLYFig. 9 Ð Thermistor T1 Location, 48FK,JK, 50JY and 50JKX,JKY 054-074 Units and 50FKX,FKY and 50FY054-104 UnitsFig. 10 Ð Thermistor T1 Location, 50FK,JK054-074 Units GAS SECTIONFig. 11 Ð Thermistor T2 Location, Size 034-048 Units Fig. 12 Ð Thermistor T2 Location, Size 054-104 UnitsFig. 13 Ð Thermistor T3 and T4 Locations Size 034-048 Units STANDARDFig. 14 Ð Thermistor T3 and T4 Locations, Size 054-104 Units 054 UNITS 064, 074, 078 UNITS 088, 104 UNITSFig. 15 Ð Accessory Relay Board Standard Factory Supplied Fig. 16 Ð Two-Step Demand Limit ModuleFig. 17 Ð Enthalpy Sensor Location Fig. 18 Ð Variable Frequency Drive Sizes 034-048 andCONTROLS INSTALLATION Space Temperature ResetFig. 20 Ð Unit Control Box Arrangement, Sizes Fig. 21 Ð Unit Control Box Arrangement, Sizes Fig. 22 Ð Unit Control Box Arrangement, Sizes 088 and Fig. 23 Ð Occupied/Unoccupied Switch with Night Setback Thermostat Fig. 25 Ð Accessory Reset BoardVoltage Drop Characteristics Fig. 24 Ð Heat Interlock RelayFig. 26 Ð Space Temperature Sensor Averaging Fig. 29 Ð 115-Volt Field Wiring to Accessory Fig. 27 Ð Single-Step Demand LimitFig. 28 Ð Two-Step Demand Limit Module 2-Step Demand Limit Control ModuleThis emulation requires the following eld-supplied parts Fig. 30 Ð Remote SASP Wiring Fig. 31 Ð External Alarm IndicationP Ð Manual Potentiometer R Ð Fixed Resistor Field Wiring R Ð Resistor Factory Installed Factory Wiring Field WiringTable 6 Ð Smoke Control Switches Required for Each Mode Modulating PowerTable 5 Ð Smoke Control Modes FireTable 7 Ð Switch Functions Modulating Power ExhaustTable 8 Ð Tubing Size SIZE in034-048 UNITS Fig. 32 Ð Smoke Control WiringALL UNITS Fig. 33 Ð Modulating Power Exhaust and Inlet Guide Vane Differential Pressure Switch SizesPressure Switch and Variable Frequency Drive Fig. 35 Ð Modulating Power Exhaust Differential Pressure Switch SizesTable 9 Ð Potentiometer Inputs and Ranges Table 10 Ð Conguration Header and DIP Switch Factory SettingsTable 11 Ð Conguration Header Jumpers Table 12 Ð DIP Switches Fig. 36 Ð Inlet Guide Vane Motor 50FK,JK034-074 Units Fig. 37 Ð Inlet Guide Vane Motor, 48FK,JK, 50FY,JYand 50FJX,FJY,FKX,FKY034-074 Units Fig. 38 Ð Inlet Guide Vane Motor Size 078-104 UnitsREAD STOP WRITE RESET Fig. 39 Ð Differential Pressure Switch for Inlet GuideModulating Power Exhaust Option Fig. 41 Ð Jumper Removal to Disable MotorTable 13 Ð VFD Set Point Frequency Command for Duct Pressure Modulating Power Exhaust Option or AccesTable 14 Ð Changing the VFD Set Point Frequency Command START UNIT Table 15 Ð Quick Test, Unit Conguration and Switch Check CONTROL SWITCHQUICK NORMALTable 16 Ð Quick Test, Thermistor and Potentiometer Check Table 17 Ð Quick Test, Output Relay CheckOPERATING INFORMATION Table 18 Ð Sensor Resistance Valueswarm-up routine, and a 26 will be displayed 034 AND 038 UNITS Fig. 42 Ð Component Arrangement, 034-048 Units044 AND 048 UNITS Fig. 43 Ð Component Arrangement, 054-104 Units 054, 064 UNITS074, 078 UNITS 088, 104 UNITS 104 UNITSSupply Fan Control with IGV Ð In most VAV units, the supply fan static pressure is controlled by inlet guide vanes. The inlet guide vanes operate independently from the micro- processor. The supply static pressure is controlled by a dif- ferential pressure switch. If the unit is equipped with a re- turn fan, building pressure is controlled by another differential pressure switch Fig. 44 Ð Modulating Power Exhaust Component Locations Sizes Fig. 45 Ð Modulating Power Exhaust Component Locations Sizes Page Table 19 Ð Compressor Loading and Unloading Sequences Table 19 Ð Compressor Loading and Unloading Sequences cont Table 20 Ð Controls Troubleshooting TROUBLESHOOTINGTable 21 Ð Operation Status Codes Table 22 Ð Diagnostic Codes · Wiring Problem Ð If the circuit is open, a failure will be detected 82 to be displayed on display board when display button iswill be energized and an error code of 82 will be displayed ergize alarm light and cause an error code of 83 to be disPage Fig. 48 Ð Processor Board Test Points Fig. 49 Ð Relay Board Test PointsFig. 51 Ð Display Board Pin Terminal Connector J10 Fig. 50 Ð Relay Board Pin Terminal Connector J9Table 23 Ð Voltage Reading Table 24 Ð Pin Terminal Connector J1 Voltages Table 25 Ð Pin Terminal Connector J2 VoltagesStep 1 Ð Low-voltage relay resistance check Step 2 Ð High-voltage relay resistance checkTable 27 Ð Terminal Strip J5 Connector Resistance Reading Table 28 Ð Enthalpy Sensor Checkout1. Disconnect all power to the unit and the VFD Fig. 52 Ð Damper Motor Connection Diagram VAVVariable Frequency Drive Table 29 Ð Carrier Default Program Parameter Values Frequency SettingsGr.Fb Gr.SFTable 30 Ð Required User Adjusted Defaults Table 31 Ð Motor Overload SettingsFig. 53 Ð Variable Frequency Drive Terminal Block Size 034-048 Units Fig. 54 Ð Variable Frequency Drive Terminal Block Size 054-104 UnitsLEGEND AND NOTES FOR FIG Page Page SERVICE TRAINING CALL FOR FREE CATALOGSTART-UP CHECKLIST II. PRELIMINARY CHECKLIST ITEMSCONTROL SETTINGS I. PRE-START-UPTEMPERATURES III. START-UPIV. NOTES ELECTRICAL