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  5. Installation And User Manual

AAON HB Series Installation And User Manual

Manual is about: Package Units & Air Handlers

Summary of HB Series

  • Page 1

    Installation and user manual hb series do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. For your safety what to do if you smell gas for your safety • extinguish any open flame • do not touch any electrical switch • do not try to light...

  • Page 2: Contents

    2 1. Description ………………………………... 3 thermostat important safety information economizer option package unit orientation return air bypass option air handling unit orientation modulating hot gas reheat gas piping 2. Model number description ....………….. 6 condensate piping unit model number 6. Start-up …...

  • Page 3: Warning

    3 1. Description important safety information only qualified personnel should perform installation, operation, and maintenance of equipment described in this manual. Hb series package units are designed for safe operation when installed, operated, and maintained within design specifications, and the...

  • Page 4

    4 package unit orientation (compressorized) service access is from the front of the unit. As you face the front of the unit, the condensing section will be on the right end of the unit, and the air handling section on the left. The drain connection is located on the back. Table 4.1, package unit dim...

  • Page 5

    5 air handling unit orientation (non-compressorized) service access is from the front of the unit. As you face the front of the unit, the controls section will be on the right end of the unit, and the air handling section on the left. The drain connection is located on the back. Figure 5a, air handl...

  • Page 6

    6 2. Model number description main features no heat electric heat natural gas aluminized hot water hot water w/ phenolic coating 0 = 1 = 2 = e = f = type* note: lp gas and high altitude conversion kits are available for field installation. 460v/3 ∅/60hz 208-230v/1 ∅/60hz 208-230v/3 ∅/60hz 3 = a = b ...

  • Page 7: Warning

    7 3. User’s information dx (direct expansion) package units and dx units with remote condenser never cut off the main power supply to the unit, except for complete shutdown. Always control the system from the thermostat, or control panel, and never at the main power supply (except in an emergency, o...

  • Page 8

    8 multiple unit operation when several units are used in conditioning the space, and any are combination heating-cooling units, all system thermostat switches must be set at either heating, cooling, or set at ‘off’. Do not run part of a system switched to an opposite mode. Cooling only units should ...

  • Page 9

    9 modulating hot gas reheat and hot gas bypass systems on dx units some dx cooling units may contain modulating hot gas reheat (mhgrh) and/or hot gas bypass (hgbp) systems as factory installed options. Piping and valves for these systems will be located on the inside wall of the condenser section. T...

  • Page 10: Warning

    10 4. Delivery all shipments are f.O.B. The factory. It is the responsibility of the receiving party to inspect the equipment upon arrival. Receipt & inspection the unit should be inspected for damage that may have occurred in transit. Do the following upon receipt: 1. Inspect all items for internal...

  • Page 11: Warning

    11 warranty. Attach all service panels, and cover all exposed equipment when work is not being performed. Leave unit protected from other construction until start- up is to occur. Heating & cooling systems gas heating system the units are equipped with a direct spark ignition system that proves the ...

  • Page 12

    12 service & installation clearances before setting the unit into place, caution must be taken to provide clearance for unit panels/doors that must be accessible for periodic service. These areas contain the controls, safety devices, refrigerant, shut- off valves and filter access. Hb package units ...

  • Page 13: Note

    13 setting the unit units should always be installed level, and above water drainage routes. Unit operation can be affected by wind. It is good practice to position unit condensing sections away from prevailing winds. Protective shipping brackets before setting the unit into its final position on th...

  • Page 14: Warning

    14 electrical check the unit data plate to make sure it matches the power supply. Connect power to the unit according to the wiring diagram provided with the unit. The power and control wiring may be brought in through the utility entry. Do not run power and control wires in the same conduit. Protec...

  • Page 15

    15 figure 15a, power and control wiring utility entry connect power wiring to terminal block, or the optional disconnect switch next to compressor. Run power supply wiring in conduit through utility entry to terminal block. Low voltage control wiring must run through separate conduit from power wiri...

  • Page 16

    16 each hb has a standard cooling lock-out feature that prevents the compressor cooling mode when the outdoor temperature is below 55 °f. Each unit also has a condenser fan cycle feature that delays the start of the condenser fan until there is satisfactory compressor discharge pressure. Three color...

  • Page 17

    17 2 step compressor cooling models − the hb models with a 2 step cooling compressor may use a 2 step cooling thermostat with the r, g, y1, y2 & w terminals connected to the similarly labeled terminals on the control board in the hb unit. − these hb models can also be connected to a single step cool...

  • Page 18

    18 figure 18a, external control inputs to control board.

  • Page 19

    19 modulating hot gas reheat the modulating hot gas reheat option is used to provide additional moisture removal capacity to the hb unit. Hot refrigerant gas discharged from the compressor is sent as needed to a reheat coil mounted immediately after the cooling coil. For this application a humidista...

  • Page 20

    20 figure 20a, reheated supply air temperature.

  • Page 21: Warning

    21 gas piping size gas piping to supply the unit with 6” to 10.5” water column (w.G.) pressure for natural gas, or 11” w.G. For propane (when a natural gas to propane conversion kit has been field installed) when all gas consuming devices in the building connected to the same gas system are operatin...

  • Page 22

    22 run piping through utility entry in front of unit, or through entry in floor of unit located next to the compressor. Then run piping through sidewall into heating cabinet. Remember to seal around all exterior cabinet penetrations at utility entries. Gas valve installed at factory. Piping to gas v...

  • Page 23: Caution

    23 condensate piping hb package units are equipped with a condensate drain connection, and ‘p’ traps are furnished with the equipment. The drain connection must be used and individually trapped to ensure a minimum amount of condensate accumulation in the drain pans. Although drainage of condensate d...

  • Page 24: Note

    24 excessive sound, or vibration. Follow procedures outlined below to start each piece of equipment. Before powering on, or starting the unit: 1. Check the unit for external damage. 2. Note all accessories installed. 3. Ensure all field and factory high and low voltage electrical connections are cor...

  • Page 25: Warning

    25 electric heating: 1. Turn the unit power on. 2. Turn the unit blower on, and check for correct rotation. 3. If correct, take blower amp readings, and compare to see if the amp draw is within the safety factor area of the motor. Once correct, turn blower off. 4. Turn on the first stage of heating....

  • Page 26

    26 7. Operation & maintenance general immediately following building occupancy, the air conditioning system requires a maintenance schedule to assure continued successful operation. A maintenance program similar to the example given below should be scheduled for routine maintenance of this equipment...

  • Page 27

    27 heating sequence on a call for heating, the supply fan will go to high speed, and the first stage of heating will be energized. The unit will go through a 5 second pre-purge of air in the heat exchanger, then it will come on, or ignite if gas heat. If the unit has a second heating stage, then sta...

  • Page 28

    28 8. Hot gas bypass the purpose of external hot gas bypass (hgbp) is to prevent coil freeze-up and compressor damage from liquid slugging during periods of low airflow operation, or with low entering air temperatures. Hgbp is useful when the air conditioning system is subject to variations in load ...

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    29.

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    30

  • Page 31

    31 pressure – temperature chart r-410a ( ° f) psig (° f) psig ( ° f) psig ( ° f) psig ( ° f) psig 20 78.3 50 142.2 80 234.9 110 364.1 140 540.1 21 80.0 51 144.8 81 238.6 111 369.1 141 547.0 22 81.8 52 147.4 82 242.3 112 374.2 142 553.9 23 83.6 53 150.1 83 246.0 113 379.4 143 560.9 24 85.4 54 152.8 8...

  • Page 32

    32 aaon, inc. 2425 s. Yukon tulsa, oklahoma 74107 tel 918-583-2266 fax 918-583-6094 download this manual, and others from: www.Aaon.Com it is the intent of aaon to provide accurate and current specification information. However, in the interest of product improvement, aaon, inc. Reserves the right t...