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Tecumseh F31HC, Installation, Operation, Service And Maintenance Instructions

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Tecumseh F31HC Installation, Operation, Service And Maintenance Instructions Download Page 2

2

TABLE OF CONTENTS

      

INSTALLATION AND OPERATION MANUAL

SUBJECT

PAGE #

 Warning Symbols And Placards

3

 General Safety Information

4

 Product Warranty Statement

5

 Receiving And Inspection

5

 Uncrating And Rigging

5

-

6

 Unit Mounting

6

-

8

 Locating Equipment

7

 Drain Line Piping

8

-

9

 Refrigerant Piping 

10

 Refrigerant Piping (Distributor / TXV / Solenoid Valve)

11

 Leak Testing, Evacuation And Charging

12

 Evaporator Superheat

12

 Refrigerant Blends / Temperature Glide

13

 Field & Factory Wiring / Electrical Requirements

13

 Typical Field Wiring Diagrams

14 

-

 22

 Start Up

23

 Service 

-

 Maintenance (Fan / Motor Assy)

24

 Service 

-

 Maintenance (Coil Corrosion)

24

 Service 

-

 Maintenance (Defrost Cycle / Heaters)

25

 Remove / Replace Fan And Motor Assy

26

 Remove / Replace Defrost Heaters

27

 Start Up / Service / Maintenance Notes

2

8

 Factory Contact Information

29

Summary of Contents for F31HC

Page 1: ...ENGLISH Installation Operation Service and Maintenance Instructions UNIT COOLERS FOR COLD ROOMS Model Series F31HC F35HC UNIT FOR USE WITH WALK IN COOLER FREEZER OR REFRIGERATED WAREHOUSE ...

Page 2: ...t Piping Distributor TXV Solenoid Valve 11 Leak Testing Evacuation And Charging 12 Evaporator Superheat 12 Refrigerant Blends Temperature Glide 13 Field Factory Wiring Electrical Requirements 13 Typical Field Wiring Diagrams 14 22 Start Up 23 Service Maintenance Fan Motor Assy 24 Service Maintenance Coil Corrosion 24 Service Maintenance Defrost Cycle Heaters 25 Remove Replace Fan And Motor Assy 26...

Page 3: ...es Toxic Substan ces Electricity Hand Injury Pos sible MANDATORY SIGNS AND THEIR MEANING OTHER SIGNS AND THEIR MEANING Protective Clo thing Reqd Forklift Traffic Connect To Earth Ground Use Safety Footwear Hard Hat Area Activate Before Work This is only a Right To Know law in the state of CA It does not mean that LU VE products contain any substance or materials that may cause cancer or reproducti...

Page 4: ... This oil can sometimes collect in small quantities inside the coil header connections where it may be observed by installing personnel when removing the factory caps It can be easily verified that this is oil and not water due to the fact that it evaporates very quickly when touched If a drop of it is placed on a flat surface it widens out quickly like a stain and if exposed to flame it burns rea...

Page 5: ...y damage or shortages to the delivering freight company immediately It is the customer s responsibility to file all claims with the freight company Damaged equipment may be refused but must not be returned to the manufacturer for any reason without prior authorization Installing personnel must exercise caution when removing equipment from crates and boxes to prevent physical injury to themselves o...

Page 6: ...ust be checked for leaks before installation Figure 3 Step 7 Do not return the unit to the distributor or manufacturer without prior authorization UNIT MOUNTING POINTS Fig 2 Unit Model Series F31HC 115 4 116 4 125 4 126 4 135 4 136 4 146 4 F31HC 215 6 216 6 225 6 226 6 235 6 236 6 246 6 Number of Fans 12 4 Diam 1 1 2 2 3 3 4 Refrig Conn Liquid Refrig Conn Suction 1 1 Dimension A 30 30 47 5 8 47 5 ...

Page 7: ...ther openings Allow a minimum return air space behind the coil equal to the height of the unit Figure 10 below On larger installations place units where they can blow freely down open aisleways between product racking shelves Mount units directly to the ceiling whenever possible greater overall air throw is partially achieved by increasing the distance between the unit and the floor For blast chil...

Page 8: ...top of the unit and the ceiling with NSF approved sealant to prevent accumulation of dirt and foreign material CONDENSATE DRAIN PAN CONNECTION Apply an approved pipe thread sealant to the threads of the drain pan fitting before making the field piping connection Do not torque over tighten the field pipe fitting attached directly to the drain pan connection Use a backer wrench on the drain pan fitt...

Page 9: ... degrees and 30 watts foot of drain line for those operating from 0 down to 20 de grees Common drain lines serving multiple units whether in the same space or different rooms must be adequately sized to handle the condensate flow from ALL connected evaporators DO NOT REDUCE THE DRAIN LINE PIPE SIZE SMALLER THAN THE CONNECTION ON THE DRAIN PAN The branch lines from each individual evaporator must a...

Page 10: ...ing efficiency over the lifetime of the system and initial installed cost Pitch all horizontal suction lines in the direction of refrigerant flow minimum 1 4 foot of run to ensure oil return Install a P trap at the bottom of ALL vertical suction risers Figure 1 This not only helps with oil return but protects the expansion valve sensing bulb from the affects of liquid drain back at the outlet of t...

Page 11: ...t select valves based only on the physical connection size the valve you install may be much to large for the application which can result in operational problems with the valve and possibly even damage to the connected unit cooler or system piping Re fer to the valve manufacturers capacity charts or selection software or consult with your local valve supplier for assistance Always be sure to prov...

Page 12: ...uum gauge reading Break the vacuum with the correct system refrigerant and charge as per the system design requirements Note Always refer to the manufacturers charging data for the system condensing unit as the unit cooler operating charge represents only a very small portion of the total year round operating charge required for the entire system Be sure to charge any refrigerant blend as a liquid...

Page 13: ... FIELD WIRING ELECTRICAL REQUIREMENTS The electrical characteristics of each unit are clearly marked on the unit rating label located on the front facing left hand end cover of the unit as viewed facing the fans This label lists the operating voltage phase and amp draw of the fan motors and defrost heaters when equipped It also lists the MINIMUM CIRCUIT AMPACITY MCA and MAXIMUM OVER CURRENT PROTEC...

Page 14: ...als 3 4 on terminal block TB2 for continuous low speed fan operation 950 RPM Fan motors will operate continuously on high speed without jumper wire installed F31 Models Units 1300 RPM F35 model units 1450 RPM See page 21 for optional two speed fan relay control wiring if required An air defrost time clock may be supplied as an option either field installed or factory mounted on the system condensi...

Page 15: ...stalled F31 Models Units 1300 RPM F35 model units 1450 RPM See page 21 for optional two speed fan relay control wiring if required The defrost time clock and block out relay are typically located in the system condensing unit All unit cooler power should feed from this unit Make sure that the heater amp draw does not exceed the defrost timer contact rating typically 40 resistive amps for an 8145 2...

Page 16: ...M See page 21 for optional two speed fan relay control wiring if required The defrost time clock block out relay auxiliary switch and heater contactor are typically located in the system condensing unit All unit cooler power should feed from this unit Make sure the total heater amp draw does not exceed the resistive rating of the contactor Also be sure the wire gauge size is adequate to carry the ...

Page 17: ...ed If the combined heater amp draw exceeds the defrost timer rating a heater contactor must be installed see alternate wiring diagram for 1 or 2 heater contactor wiring arrangement When connecting 2 electric defrost unit coolers to 1 defrost timer remove the black wire from the defrost termination fan delay control which is factory wired to terminal 2 TB2 on unit cooler 2 and cap the wire This wil...

Page 18: ...amp rating of the contactor Also be sure the wire gauge size is adequate to carry the total amp load required When using a heater contactor with unit cooler defrost heaters factory wired for single phase remove factory installed jumper between terminals 2 3 on TB1 and wire directly to heater contactor as shown above When connecting 2 electric defrost unit coolers to 1 defrost timer remove the blac...

Page 19: ...M See page 21 for optional two speed fan relay control wiring if required The defrost time clock block out relay auxiliary switch and heater contactor are typically located in the system condensing unit All unit cooler power should feed from this unit Make sure the total heater amp draw does not exceed the resistive rating of the contactor Also be sure the wire gauge size is adequate to carry the ...

Page 20: ...e the total heater amp draw per unit cooler does not exceed the resistive amp rating of the contactor Also be sure the wire gauge size is adequate to carry the total amp load required When connecting 2 electric defrost unit coolers to 1 defrost timer remove the black wire from the defrost termination fan delay control which is factory wired to terminal 2 TB2 on unit cooler 2 and cap the wire This ...

Page 21: ...sure the total heater amp draw does not exceed the resistive amp rating of the contactors supplied Also be sure the wire gauge size is adequate to carry the total amp load required When connecting 2 electric defrost unit coolers to 1 defrost timer remove the black wire from the defrost termination fan delay control which is factory wired to terminal 2 TB2 on unit cooler 2 and cap the wire This wil...

Page 22: ...g in reduced operating costs over the life of the equipment Remove jumper wire if installed between unit cooler terminals 3 4 before connecting relay wires Be sure that fan relay coil voltage matches unit cooler control voltage Wire across normally open NO relay contacts Single Pole Single Throw Thermostat ELECTRONIC ROOM THERMOSTAT WIRING OPTION Be sure that room thermostat power wiring matches t...

Page 23: ...ondensate drain pan If the drain pan is holding water check for proper P traps in the line in the absence of a trap negative pressure at the drain pan connection fitting can cause water to hold up in the pan Verify unit is mounted level Check drain line piping for correct pitch or possible obstructions debris and correct as required On electric defrost units manually force system into a defrost cy...

Page 24: ... Flakes of aluminum or white powder present in drain pan on product or elsewhere in the room Wrong cleaning agent or too high of concentra tion of cleaner being used Inadequate im proper rinsing of cleaner from the coil surface Use correct cleaner for the application Follow the manu facturers directions completely Use copious amounts of rinse water Corrosive agent present in air attacking aluminum...

Page 25: ... Defrost cycle too short terminates on time Set defrost timer to minimum 30 min per cycle Defrost cycle too short terminates on temp Check defrost termination control closes at 55 deg Replace defective control Ice build up on fan guard fan motor assembly mo tor mount fan panel also ice droplets on ceiling pan el in front of fans and be hind coil on upper back wall and on product Also ice on floor ...

Page 26: ...the main power supply to the unit Note In some cases more than 1 power source breaker or service disconnect switch may be supplied BE SURE TO LOCK OUT TAG OUT ALL SOURCES OF POWER NO YES MODEL SERIES F35HC MOTOR FAN ASSEMBLY REMOVAL MODEL SERIES F31HC MOTOR AND FAN ASSEMBLY REMOVAL SERVICE MAINTENANCE ...

Page 27: ... the coil Item 3 7 Install the retaining clip U onto the replacement heater Item 9 8 Attach the 2 pulling wires still in the coil Item 3 to the wire leads of the replacement heater Item 7 and guide the boot ends of the heater through the holes in the tube sheet Item 11 and straight into the coil Item 12 while an assistant pulls gently on the opposite end of the 2 pulling wires IMPORTANT Be careful...

Page 28: ...28 START UP SERVICE MAINTENANCE NOTES ...

Page 29: ...29 Customer Service Number 888 254 1033 Customer Service Email customer service tecumseh com ...

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