Dunham-Bush MM0305F Installation, Operation & Maintanance Manual
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Dunham-Bush MM0305F Installation, Operation & Maintanance Manual

Air-cooled split system air conditioner with scroll copmressors r22/r407c
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Form No.: MM0305F/MM0307A
INSTALLATION,
INSTALLATION,
R
OPERATION &
OPERATION &
Products That Perform...By People Who Care
MAINTENANCE
MAINTENANCE
MANUAL
MANUAL
ACCS
Air - Cooled
HEB-D
Split System

Air Conditioner

with Scroll
Compressors
R22 / R407C
COOLING
HEAT PUMP
VEB-D

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Yolandi
May 23, 2025

need specs on this Dunham Bush unit R22 HP60H

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Summary of Contents for Dunham-Bush MM0305F

  • Page 1: Air Conditioner

    Form No.: MM0305F/MM0307A INSTALLATION, INSTALLATION, OPERATION & OPERATION & Products That Perform...By People Who Care MAINTENANCE MAINTENANCE MANUAL MANUAL ACCS Air - Cooled HEB-D Split System Air Conditioner with Scroll Compressors R22 / R407C COOLING HEAT PUMP VEB-D...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS DESCRIPTION PAGE NO INTRODUCTION ............................. 3 1.1 NOMENCLATURE..........................3 GENERAL INFORMATION 2.1 RECEIVING, INSPECTION AND PACKAGING ..................4 2.1.1 Air-Cooled Condensing Units ( ACCS ) ..................4 2.1.2 Evaporator Blower Units ( HEB/VEB/EB )..................4 2.2 RIGGING AND UNCRATING ......................... 4 2.3 LIMITATIONS ............................

  • Page 3: Introduction

    1.0 INTRODUCTION The Dunham-Bush air-cooled split system air conditioner and heat-pumps are designed, matched, manufactured tested and ready for installation when it reached the site. The evaporator unit consists mainly of a direct expansion evaporator coil(s) with factory package thermal expansion valve, to be coupled with air cooled condenser unit consisting of scroll compressor(s) and large heat rejection condenser coil with integral subcooling circuit(s).

  • Page 4: General Information

    2.0 GENERAL INFORMATION 2.1 RECEIVING, 5. Thermostat, remotely mounted for cooling only and heat pump INSPECTION AND 6. Discharge plenum and return PACKAGING air grille As soon as the unit is received, it should be inspected if there is any damage during transit. 2.2 RIGGING AND Make a separate written request if there is any UNCRATING...

  • Page 5: Installation

    3.0 INSTALLATION 3.1 CONDENSING UNITS If installing two units together, make sure INSTALLATION that the discharge air from one unit were not circuited by the other unit. (Figure installing condensing units, 3.1.) considerations should given 5 .) Location where there is no direct heat following: source such as near a generator.

  • Page 6: Air Cooled Condensing Units Clearance

    3.0 INSTALLATION 3.2 AIR-COOLED CONDENSING UNITS CLEARANCE (SUGGESTED) ACCS 68, 81, 95 ACCS 108, 125, 145 ACCS 160, 190, 220, 250, 290 ACCS 320, 380, 435...
  • Page 7 3.0 INSTALLATION ACCS 480, 510, 570 ACCS 640, 700, 760 ACCS 800, 890, 960 ACCS 1020, 1140, 1340, 1520...

  • Page 8: Evaporator Blower Units Installation

    3.0 INSTALLATION 3.3 EVAPORATOR BLOWER UNITS INSTALLATION 3.3.1 TYPICAL VEB-D / EB-D DUCTING SYSTEM 3.3.2 TYPICAL HEB-D DUCTING SYSTEM Leave the unit in its packaging until it reaches the final destination. This unit is designed for indoor installation only. In installing the unit, these suggestions should be given consideration so that the unit will operate with optimum capacity and also to ease the installation and future services.

  • Page 9: Evaporator Blower Units Clearance

    3.0 INSTALLATION 1.) Location that can withstand the unit's weight. a.) Sometimes it is necessary to reinforce the ceiling with crossbeam or framework. b.) Use suspension bolts to install the unit and make sure the bolts can withstand the weight distribution.

  • Page 10: Horizontal Casing Type- Heb

    3.0 INSTALLATION b.) EB 250D, 290D, 320D, 380D, 435D, 480D, 510D, 570D, 640D, 700D, 760D c.) EB 800D, 890D, 960D, 1020D, 1140D, 1340D, 1520D. 3.4.2. HORIZONTAL CASING TYPE- HEB HEB 68D, 81D, 95D, 108D, 125D, 145D, 160D, 190D, 220D...

  • Page 11: Duct Connection

    3.0 INSTALLATION 3.5 DUCT CONNECTIONS A length of straight duct shall be installed as per Figure 3.5. This is to ensure uniform flow All ducts shall be made according to local and/ of discharge air. If an elbow need to be or national codes and also with good duct installed, then it shall be 1.5 of equivalent duct installation practice.
  • Page 12 3.0 INSTALLATION 2.) EVAPORATING IS ABOVE THE COMPRESSOR. Note : Traps should be provided for every 20ft [6.1m] of vertical riser for proper oil movement. 3a.) TYPICAL PIPING SCHEMATIC (WITH OPTIONAL ACCESSORY AS INDICATED)

  • Page 13: Refrigerant Piping

    3.0 INSTALLATION 3b.) TYPICAL PIPING SCHEMATIC – HEAT PUMP (WITH OPTIONAL ACCESSORY AS INDICATED) 3.7 REFRIGERANT PIPING must be provided on the pipe so that condensate will drain and not overflowing 1.) Prior to connecting the tubes, make sure to the drain pan.

  • Page 14: Leak Test (System Pressure Test)

    3.0 INSTALLATION 3.8 LEAK TEST (SYSTEM 10.) When system is tight, proceed with PRESSURE TEST) vacuum test and dehydration. 1.) Leak test pressure 200psig [1380kPa]. Disconnect or shut off all 3.9 VACUUM TEST devices which may be damaged by 200psig [1380 kPa] test pressure. DEHYDRATION 2.) Open all valves in system so that entire The purpose of evacuation is to evacuate the...

  • Page 15: Installation Of Driers Or Sight Glass

    3.0 INSTALLATION 3.10 INSTALLATION 6.) Shut off the system (compressor, fans, DRIERS SIGHT pumps) and leave for 24 hours. GLASS 3.12 LUBRICATION 1.) Break vacuum with nitrogen. 2.) When permanently brazed drier or sight The scroll compressor use mineral oil 3GS, for glass is used, open one valve on system to R22 compressors and POE (Polyol ester) oil atmosphere...

  • Page 16: External Equalizer Connection

    3.0 INSTALLATION FIGURE 3.13: REMOTE BULB 1. Remote Bulb Small Suction Line (Smaller Than 7/8” [22.2mm]) 2. Remote Bulb On large Suction Line (7/8” [22.2mm] and Larger) 5.) For good thermal contact, the bulb should on the valve body. To set the pressure, loose be securely fastened with two bulb straps the seal nut as shown below and turn the to a clean, straight section of the suction...

  • Page 17: Tightening Of Pulley Set Screw

    3.0 INSTALLATION 3.17 TIGHTENING OF FIGURE 3.18: BELT SPAN PULLEY SET SCREW Apply one or two drops of thread locked 243 to the engagement area of set screws before tightening the pulleys according to the recommended torque. Set Screw Size Tightening Torque 5/16”...

  • Page 18: Operation

    4.0 OPERATION 4.1 PHASE ROTATION would be sent to the control panel which then relay the signal to the reversing valve to Avoid running in reverse rotation. If during reverse the cycle. Now, the outdoor coil would initial start up the compressor does not build be discharging hot air and defrosting the ice on up pressure, noise is abnormally loud and the fins surface.

  • Page 19: Dimensional Data

    4.0 OPERATION 4.9 DIMENSIONAL DATA 1.) Air Cooled Condensing Units SUCTION LIQUID MODEL ACCS 68, 81, 95 SIZE SIZE (QTY) (QTY) ACCS 68 46 1/2[1181] 42 11/16[1084] 14 3/8[365] 29 7/16[748] 15 3/4[400] 7/8[22] (1) 3/8[10] (1) ACCS 81 48 1/2[1232] 44 3/8[1127] 19 5/16[491] 35 1/4[895] 20 7/8[530] 7/8[22] (1) 1/2[13] (1)
  • Page 20 4.0 OPERATION SUCTION LIQUID SIZE MODEL ACCS 320, 380, 435 SIZE (QTY) (QTY) ACCS 320 48[1219] 1 3/8[35] (2) 5/8[16] (2) ACCS 380 56[1422] 1 5/8[41] (2) 5/8[16] (2) ACCS 435 56[1422] 1 3/8[35] (3) 5/8[16] (3) SUCTION SIZE (QTY) LIQUID SIZE MODEL ACCS 480, 510, 570...
  • Page 21 4.0 OPERATION MODEL SUCTION SIZE LIQUID SIZE ACCS 800, 890, 960 (QTY) (QTY) ACCS 800 1 3/8[35] (5) 5/8[16] (5) ACCS 890 1 3/8[35] (2), 5/8[16] (5) 1 5/8[41] (3) ACCS 960 1 5/8[41] (3) 7/8[22] (3) MODEL SUCTION SIZE LIQUID SIZE ACCS 1020, 1140, 1340, 1520 (QTY)
  • Page 22 4.0 OPERATION Evaporator Units HEB 68D, 81D, 95D MODEL HEB 68D 20[508] 46[1168] 24[610] 13[330] 11 3/8[289] 16 1/2[419] HEB 81D 20[508] 46[1168] 24[610] 13[330] 11 3/8[289] 16 1/2[419] HEB 95D 23[584] 46[1168] 30[762] 15 1/2[394] 13 1/2[343] 15 1/4[387] HEB 108D, 125D, 145D, 160D, 190D, 220D MODEL HEB 108D...
  • Page 23 4.0 OPERATION EB 480D, 510D, 570D, 640D, 700D, 760D MODEL EB 480D 68[1727] 84[2134] 66[1676] 25[635] 25[635] 34[864] EB 510D 68[1727] 84[2134] 66[1676] 25[635] 25[635] 34[864] EB 570D 68[1727] 84[2134] 66[1676] 25[635] 25[635] 34[864] EB 640D 78[1981] 84[2134] 66[1676] 28[711] 28[711] 34[864] EB 700D...

  • Page 24: Typical Operating Sequence

    4.0 OPERATION 4.10 TYPICAL OPERATING SEQUENCE...

  • Page 25: Maintenance

    5.0 MAINTENANCE 5.1 MAINTENANCE regular inspection and checking to ensure the unit's optimum performance and compliance These units are designed to provide years of with local rules and regulations. services with minimum maintenance. Nonetheless, it is a good practice to carry out ITEM MAINTENANCE PROCEDURE RECOMMENDED SCHEDULE...

  • Page 26: Trouble Shooting Chart

    5.0 MAINTENANCE 5.2 TROUBLE SHOOTING CHART...
  • Page 27 5.0 MAINTENANCE...
  • Page 28 5.0 MAINTENANCE...

  • Page 29: Sample Log Sheet

    5.0 MAINTENANCE 5.3 SAMPLE LOG SHEET SHEET NO......DUNHAM-BUSH AIR COOLED SPLIT UNIT UNIT MODEL NO............UNIT NO........VOLTS:......Hz ..... UNIT SERIAL NO........................START UP : DATE ..........TIME ........... DATE TIME COMP. NO. SUCTION PRESSURE SUCTION TEMPERATURE DISCHARGE PRESSURE...

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Mm0307a

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