Related Manuals for KRUEGER A Series
Summary of Contents for KRUEGER A Series
- Page 1 WWW.KRUEGER-HVAC.COM HORIZONTAL LOW PROFILE FAN COIL UNITS SERIES A Installation, Operation, and Maintenance Manual...
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Page 2: Table Of Contents
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TABLE OF CONTENTS SAFETY SYMBOLS & CONSIDERATIONS ....3 SECTION THREE - NORMAL OPERATION & PERIODIC MAINTENANCE ........20 SECTION ONE - RECEIPT & General, Motor/Blower Assembly, and Fan Deck ....... 20 INITIAL INSTALLATION .......... -
Page 3: Safety Symbols & Considerations
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SAFETY SYMBOLS The following symbols are used in this document to alert the reader to areas of potential hazard: DANGER: Indicates an imminently hazardous CAUTION: Identifies a hazard which could lead situation which, if not avoided, will result in death to damage to the machine, damage to other or serious injury. -
Page 4: Initial Installation
PREFACE No attempt should be made to handle, install, or service any unit without following safe practices Krueger fan coils represent a prudent investment which can, regarding mechanical equipment. with proper installation, operation, and regular maintenance, Caution give trouble-free operation and long service. -
Page 5: Unpacking & Inspection
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL UNPACKING & INSPECTION HANDLING & INSTALLATION All units are carefully inspected at the factory throughout While all equipment is designed for durability and fabricated the manufacturing process under a strict detailed quality for sturdy construction and may present a rugged assurance program,... -
Page 6: Coils
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL COILS All fan coils are available in 2 or 4 pipe configurations. Heating coils are available in reheat or preheat position. Heating and cooling coils are available with right, left or opposite side connections. -
Page 7: Cooling/Heating Medium Connections
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL COOLING/HEATING MEDIUM CONNECTIONS If the valve package connection at the coil is made with a union, the coil side of the union must be prevented from Toxic residues and loose particles resulting from twisting (“backed up”) during tightening to prevent damage manufacturing and field piping techniques such to the coil tubing. -
Page 8: Drain Pan
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL DRAIN PAN AUXILIARY DRAIN PANS Standard drain pans are externally insulated, single wall Mounted directly to the unit drain pan, AUXILIARY DRAIN galvanized steel and can be equipped with a secondary PANS may also be secured by the mounting holes to field drain connection. -
Page 9: Ductwork Connections
If not included on the unit or furnished from electric heat and control components. Terminal strips are the factory, Krueger supply and return grilles are available in furnished for simple power and control wiring connections. a variety of types. -
Page 10: Telescoping Bottom Panel
Refer to assembly submittal drawings Note for specific dimensions. Drawings are subject to change without notice. Refer to www.krueger-hvac.com for current submittal drawings. SHIM AS REQUIRED TELESCOPING BOTTOM 10 1/2"... -
Page 11: Service & Clearance Requirements
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SERVICE AND CLEARANCE REQUIREMENTS HORIZONTAL, LOW PROFILE EXPOSED UNITS BACK PANE (STRUCTURAL) CORNER PANEL (REMOVABLE) FRONT PANEL (STRUCTURAL) BOTTOM PANEL “TRAP DOOR” (REMOVABLE) 9.5” (241) BOTTOM RETURN FILTER CLEARANCE 10.5”... -
Page 12: Height Restricted Application
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SERVICE AND CLEARANCE REQUIREMENTS: HEIGHT RESTRICTED APPLICATION HORIZONTAL, LOW PROFILE EXPOSED UNITS CORNER PANELS SHOWN ROTATED 90° 0" CLEARANCE BETWEEN UNIT AND STRUCTURE UNIT INSTALLED 0" REQUIRED CLEARANCE CORNER PANELS ROTATE ABOVE UNIT ABOUT PIVOT POINT... -
Page 13: Width Restricted Application
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SERVICE AND CLEARANCE REQUIREMENTS: WIDTH RESTRICTED APPLICATION HORIZONTAL, LOW PROFILE EXPOSED UNITS CORNER PANELS SHOWN LIFTED AND ROTATED 5° 3" (76) CLEARANCE BETWEEN 3" (76) CLEARANCE BETWEEN STRUCTURE AND UNIT STRUCTURE AND UNIT ABIDE BY APPLICABLE CODES AND STANDARDS... -
Page 14: External Space Requirements
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SERVICE AND CLEARANCE REQUIREMENTS: EXTERNAL SPACE REQUIREMENTS HORIZONTAL, LOW PROFILE PLENUM AND FREE RETURN 22" (559) TOP VIEW 8" (204) SUPPLY AIR OPENING WIDTH 1" (25) OPTIONAL SIDE ACCESS 8 1/2"... -
Page 15: Section Two - Start-Up
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SECTION TWO - START-UP GENERAL COOLING/HEATING SYSTEM Before beginning any start-up operation, the startup Prior to the water system start-up and balancing, the chilled/ personnel should familiarize themselves with the unit, hot water systems should be flushed to clean out dirt and options accessories,... -
Page 16: Motor & Fan Data
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL MOTOR AND FAN DATA TABLE 2A: PSC MOTORS - KHFP, KHFE 115 VOLTS 208/230 VOLTS 277 VOLTS PSC MOTOR HP UNIT SIZE # OF FANS FAN SPEED WATTS (QTY) AMPS AMPS... - Page 17 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL MOTOR AND FAN DATA TABLE 2B: PSC MOTORS, MODEL KHFH 115 VOLTS 208/230 VOLTS 277 VOLTS PSC MOTOR HP UNIT SIZE # OF FANS FAN SPEED WATTS (QTY) AMPS AMPS AMPS...
- Page 18 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL MOTOR AND FAN DATA TABLE 3: EC MOTORS AMPS EC MOTOR HP WATTS 115 VOLTS 208/230 VOLTS 277 VOLTS UNIT SIZE FAN SPEED # OF FANS (QTY) (STD/HS) 3-SPEED 3-SPEED 3-SPEED...
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Page 19: Water System Balancing
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL WATER SYSTEM BALANCING CONTROLS OPERATION A complete knowledge of the hydronic system, its Before proper control operation can be verified all other components, and controls is essential to proper water system systems must be in proper operation. -
Page 20: Section Three - Normal Operation
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SECTION THREE - NORMAL OPERATION & PERIODIC MAINTENANCE GENERAL FAN DECK Each unit on a job will have its own unique operating The fan assembly is easily removed from the unit without environment and conditions that may dictate a maintenance disconnecting the ductwork for service access to motors and schedule for that unit that is different from other equipment... -
Page 21: Coil
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL COIL ELECTRICAL WIRING & CONTROLS Coils may be cleaned in place by removing the motor/ blower The electrical operation of each unit is determined by the assemblies and brushing the entering air face between fins components and wiring of the unit and may vary from unit with a soft brush parallel to fins. -
Page 22: Filters, Throwaway
[508, 1016 x 241 x 25]" NOTES: Face and free areas are in square feet [square meters]. Filter sizes are in inches [millimeters]. Free area of Krueger Model KHFE and Telescoping Bottom Panel return grilles. ® Free area of Krueger Model KHFE supply grille and minimum free area allowable for a supply grille supplied by others. -
Page 23: Optional Item Installation
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL CONDENSATE WATER PUMP CURRENT SWITCH DEVICE SAFETY WARNING: Risk of electric shock. Make SAFETY WARNING: The Current Switch is intended certain that the entire power supply to the unit/ to provide an input to equipment under normal system is disconnected before attempting to install, operating conditions. -
Page 24: Differential Air Pressure Switch
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL DIFFERENTIAL AIR PRESSURE SWITCH General Information Assembly This accessory is a differential pressure switch with a The differential air pressure switch is mounted inside the normally-open (NO) dry contact that is factory calibrated unit with double sided tape behind the filter retention tab. -
Page 25: Discharge Air Sensor
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL DISCHARGE AIR SENSOR General Information The Discharge Air Sensor is a nickel 1kΩ sensor probe with a flanged mounting bracket (no enclosure). Suggested Location ENVIRONMENT UNIT’S FAN SECTION (OUTSIDE OF UNIT) (INSIDE OF UNIT) The Discharge Air Sensor is fitted to the side of the coil flange... -
Page 26: Low Temperature Cutout Control
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL LOW TEMPERATURE CUTOUT CONTROL General Information Replacement Instructions This low temperature device will de-energize the system The primary purpose of the low limit cutout is to prevent the if the operating conditions begin to approach freezing (as coil from freezing. -
Page 27: Condensate Float Switch Installation
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL CONDENSATE FLOAT SWITCH INSTALLATION Ensure float switch assembly is firmly secured to the bracket. Ensure top of float is below rim of pan. Switch will trip when the water level reaches a point even with top of float when float is in down position. -
Page 28: Unit Weights
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL UNIT WEIGHTS TABLE 5: UNIT WEIGHT DATA (LBS./KG) UNIT SIZE COMPONENT KHFH BASE UNIT 22 [10] 25 [12] 33 [15] 43 [20] 53 [24] 60 [27] 74 [34] 83 [38] KHFH BASE UNIT 24 [11]... -
Page 29: Start-Up Checklist
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SECTION FOUR: INSPECTION & START-UP CHECKLIST RECEIVING & INSPECTION UNIT STARTUP я Unit received undamaged я General visual unit & system inspection я Unit received complete as ordered я... -
Page 30: Section Five: Fan Relay Board
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SECTION FIVE: FAN RELAY BOARD INSTALLATION, OPERATION AND MAINTENANCE INSTALLATION MOUNTING The Fan Relay Board assembly (FRBii) provides electronic control for the fan motor and various connections for Important: Do not overtighten the screws. - Page 31 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL Reference Wire Diagram...
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Page 32: Frbii Inputs And Outputs
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL J2/J3 – Incoming Power FRBii INPUTS AND OUTPUTS TB1 – Low Voltage Peripheral Devices TABLE F.3 – INCOMING POWER (J2 & J3) SIGNAL IDENTIFICATION (See Table F.9 for detailed description of each signal) SIGNAL NEUT TABLE F.1 –... -
Page 33: Jumpers And Test Points
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL Tools Required for Installation/Troubleshooting: JUMPERS • Digital multimeter capable of measuring 30 volts AC • Insulated 1/8” flat bladed screwdriver TABLE F.7 – JUMPER DESCRIPTION • Fuse puller (optional) JUMPER NAME DESCRIPTION... -
Page 34: Screw Terminal Signals And Checking Wire Harnesses
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SCREW TERMINAL SIGNALS TABLE F.9 – SCREW TERMINAL SIGNAL IDENTIFICATION SIGNAL SIGNAL NAME DESCRIPTION Cool 1 Chilled water valve actuator control input and thermostat cooling output. “Close” input of modulating chilled water valve actuator or 2nd stage chilled water valve actuator control input and thermostat cooling output. Cool 2 Y1 is “Open”... -
Page 35: Section Six: Troubleshooting
KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL SECTION SIX: TROUBLESHOOTING Risk of Electric Shock: Disconnect or isolate all power supplies before making electrical connections. More than one disconnection or isolation may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death. - Page 36 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) PSC MOTOR PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION No demand Verify thermostat or control is calling for heating or cooling. Fan speed is not commanded Verify fan run command is present at ‘g’ terminal of fan relay board (24v units) or of terminal block. No power to motor;...
- Page 37 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) PSC MOTOR (CONTINUED) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Voltage or ground loss at motor Verify proper voltage and ground at motor. Blower blocked Clear blockage. Verify blower rotates freely with motor disconnected. Verify operation of thermostat or controller.
- Page 38 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) EC MOTOR PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION No demand Verify thermostat or control is calling for heating or cooling. Fan speed is not commanded Verify fan run command is present at Fan Relay Board. No power to motor.
- Page 39 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) EC MOTOR (CONTINUED) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Lack of required external static pressure External static pressure not as designed. Adjust external static pressure to design pressure. [24V units] Three speed switch in wrong position Verify three speed switch, if present, is set to desired speed.
- Page 40 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) EC MOTOR (CONTINUED) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Motor mounting bolts loose Tighten motor mounting bolts. Motor shaft bent Replace motor. Disconnect power from unit. Verify motor rotates freely by hand with blower disconnected. Motor bearing end of life Note: EC motors may not rotate freely as the rotor aligns with the stator magnets.
- Page 41 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) ELECTRIC HEATER PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Insufficient airflow Verify proper airflow. Loss of demand Verify thermostat or control is calling for heating. Verify demand voltage is present at unit. [24V units] Loss of demand Verify 24V control signal at ‘W’...
- Page 42 KHF - SERIES A FAN COIL UNITS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL TROUBLESHOOTING (CONTINUED) ELECTRIC HEATER (CONTINUED) PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Insufficient airflow Verify that airflow is sufficient to provide a minimum of 70 CFM per kW of electric heat. Electric heaters require even airflow across the face of the heater in order to operate properly.
- Page 44 CONNECT WITH US! 1401 N. Plano Rd. Richardson, TX 75081 tel: 972.680.9136 www.krueger-hvac.com kruegerinfo@krueger-hvac.com KHF - Series A IOM: 04/2021 ©Krueger 2021. All Rights Reserved.
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