Aaon RL-240 User Manual

RL SERIES Packaged Rooftop Units & Outdoor Air Handling Units Installation, Operation, & Maintenance

10 UNIT HANDLING To prevent injury or death lifti

11 1. Startup and service must be performed by a Factory Trai

12 4. Provide adequate combustion ventilation air to the furnace. If a vent duct extension is used, a class III approved vent is require

13 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE0

14 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE

15 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE0

16 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE

17 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE0

18 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE

19 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE0

20 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE

21 RL Series Feature String Nomenclature :SIZEVLTCONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A14B151617181920212223RL– 1 0 0 – 3 – 0 –BE0

22 General Information RL Series packaged rooftop and outdoor air handling units have been designed for outdoor installation only.

23 Receiving Unit When received, the unit should be checked for damage that might have occurred in transit. If damag

24 accumulation out of the compressor before it is started. Always control the unit from the thermostat, or control panel, never at the main

25 If codes require a condensate drain line, the line should be the same pipe size or larger than the drain connection, include a p-trap, and pitch

26 For horizontal return and discharge applications, total height of mounting rail and unit base rail must be high

27 Figure 4 - Curb Mounting with Dimensions Figure 5 - Steel Mounting Rail with Dimensions Table 2 - Mounting Dimensions Tons A B C D 45-135 100”

28

29 Reassembling Split Units Some RL Series units are built and shipped in two separate sections. Shipping covers should be removed from the ends wher

3 Table of Contents Safety ...

30 Electrical Connection of Split Units Before attempting to make wire connections between sections it is important to refer to the unit specific w

31 Figure 10 - Factory Supplied End Flashings Vestibule Exhaust Fan Prior to unit operation of units with service vestibules the exhaust f

32 Figure 12 - Terminal Block Startup technician must check for proper motor rotation and check blower motor amperage listed on the moto

33 Gas Heating Gas piping must be installed in accordance with local codes, or in the absence of local codes, installation must conf

34 A factory installed pressure tap on the outlet end of the gas valve can be used to verify a manifold pressure of 3.5” w.c. for natural gas,

35 All gas fired heat exchangers are completely tested at the factory before shipment. This will remove nearly all of the o

36 Figure 14 - Gas Heater Rain Hood Screws Condensate Drain Piping Unit is equipped with 2 or more condensate drain pan connect

37 Draw-Through Coils Figure 15 - Draw-Through Drain Trap The X dimension on the draw-through trap should be at least equal to the absolute value o

38 minimum pressure drop, so do not include dirt allowance pressure drops for filters. The bottom of the leaving pipe should be at least one half

39 Figure 17 - Evaporative-Cooled Cond. Section, Including Field Water Connections and Base Cutout

4 Cartridge Filter Installation ... 45 Adjusting

40 Startup (See back of the manual for startup form) Supply, Return, and Exhaust Backward Curved Fans RL Series units are equipped with direct

41 Figure 20 - Securing Air Volume Band Ends For single set screw applications, tighten the set screw to the required torque setting (Table 8)

42 Figure 22 - Fan with the HUB on the top and RET on the bottom. Step 3: Determine the direction of rotation Right, R, is clockwise when faci

43 Step 7: Determine the current blade pitch and the pin location for the new blades Table 9 - Return/Exhaust Fan Pin Location in the Bushing Mount Ty

44 the neoprene gasket. The front isolators should be adjusted until this gap measures approximately ¼” for units with three or four blo

45 Figure 29 - Closed Back Draft Damper The back draft damper will remain open with no back pressure on the damper (see Figure 30). T

46 get the proper charge. After charging, unit should be operated in reheat (dehumidification) mode to check for correct operation. Aft

47 Adjusting Sub-cooling and Superheat Temperatures The system is overcharged if the sub-cooling temperature is too high and the evaporator is full

48 Table 14 - R-410A Refrigerant Temperature-Pressure Chart PSIG PSIG PSIG PSIG PSIG (F) R-410A R-22 (F) R-410A R-22 (F) R-410A R-22 (F) R-4

49 Indirect Gas Heat Startup

5 Pump Maintenance ... 61 Fan Motor Ma

50 Access Doors Lockable access doors are provided to the services vestibule and to sections of the unit which may require maintenance or se

51 Operation Unit operations should be controlled with thermostat, or unit controller, never at the main power supply, except for emergenc

52 Maintenance (See back of the manual for maintenance log) At least once each year, a qualified service technician should check out the unit. Fans,

53 Figure 34 - Typical Factory Mutual (FM) Gas Piping Schematic for a Direct Fired Heater The burner comes with a pilot to ignite the flame and the

54 125% of the maximum manifold gas pressure as shown on the unit nameplate. 7. There is an adjustable manual reset low gas pressure switch on Main

55 4. Ensure that all vents to the atmosphere are clean and free from obstruction. 5. Inspect and clean all drip legs in the gas lines. 6. Inspect

56 Condensate Drain Pans Drain pans will have moisture present and require periodic cleaning to prevent microbial growth. Cleaning of the dra

57 Severe Service The following recommended maintenance procedures are basic requirements for normal operating environments. For sev

58 from the condenser does not enter the condenser air inlet. Warranties Please refer to the limitation of warranties in effect at the time of

59 pump casing. Check rotation each time motor leads have been disconnected. 2. Check all connections of motor and starting device with wir

6 Index of Tables and Figures Tables Table 1 - Unit Clearances ...

60 Figure 38 - Water Makeup Valve Makeup water supply pressure should be maintained between 15 and 60 psig for proper operation of the v

61 If a fault occurs in the evaporative condenser fan motor VFD, normally closed fault terminals on the VFD will interrupt the safety circuit,

62 be made with the circulation pump on and fans off. Mist Eliminators The mist eliminators must be correctly positioned when they are rep

63 will be removed when the heat load is less that design. The AAON evaporative-cooled condenser is equipped with a desuperheater. The desuperhea

64 recommendations on chemical cleaning procedures. Air-Cooled Condenser The air-cooled condenser section rejects heat by passing outdoor air

65 Table 16 - RL-045, RL-060, and RL-070 Standard Filters Standard Position (Upstream of the Cooling Coils) Feature Quantity / Size Type Pre Filter 6A

66 Table 21 - RL-100, RL-110, RL-120, RL-125, and RL-135 Standard Filters Pre Position (Upstream of the Blow-Through Fans) Feature Quantity / Size Ty

67 Table 26 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters Standard Position (Upstream of the Cooling Coils) Feature Quantity / Size

68 Table 27 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters Pre Position (Upstream of the Blow-Through Fans) Feature Quantity / Size

69 Table 28 - RL-045 to RL-125 and RL-135 High Efficiency Bag Filters Standard Position (Upstream of the Cooling Coils) Feature Quantity / Size Type 6

7 Figures Figure 1 - RL Series Unit Orientation ... 25 Figure

70 Table 30 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters Standard Position (Upstream of the Cooling Coils) Feature Quantity / Size

71 Table 31 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters Pre Position (Upstream of the Blow-Through Fans) Feature Quantity / Size T

72 Table 32 - RL-134 and RL-150 to RL-240 High Efficiency Bag Filters Standard Position (Upstream of the Cooling Coils) Feature Quantity / Size Type

73 Table 33 - RL-134 and RL-150 to RL-240 High Efficiency Bag Filters Pre Position (Upstream of the Blow-Through Fans) Feature Quantity / Size Type 6A

74 Table 34 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters Final Filter Position Feature 6B Quantity / Size Type Pre Filter High Eff

75 Table 36 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters Final Filter Position Feature 6B Quantity / Size Type Pre Filter High Effi

76 Table 38 - RL-045 to RL-125 and RL-135 Energy Recovery Wheel Filters Feature Quantity / Size Type Pre Filter 1A D, H, Q, U 8 / 18” x 24” 4” Pleate

77 RL Series Startup Form Date:______________ Job Name:_____________________________________________________________________ Address:_______________

Energy Recovery Wheel Assembly Wheel(s) Spin Freely Check Rotation FLA____________ Number hp L1 L2 L3 1 2 Power Return Ass

79 Compressors / DX Cooling Number/stage L1 L2 L3 Head Pressure PSIG Suction Pressure PSIG Crankcase Heater Amps 1 2 3 4 5

8 Safety ELECTRIC SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow saf

Condenser Fans Alignment Check Rotation Nameplate Amps________ Number hp L1 L2 L3 1 2 3 4 5 6 Evaporative-

81 Electric Heating Stages__________ Limit Lockout Aux. Limit Lockout Stage Amps Stage Amps 1 2 3 4 5 6 7 8 9 10 11 12

Maintenance Log This log must be kept with the unit. It is the responsibility of the owner and/or maintenance/service contractor to

83 Literature Change History May 2011 Update of RL IOM to match the format of other current AAON literature. Update of filter sizes, unit startup fo

AAON 2425 South Yukon Ave. Tulsa, OK 74107-2728 Phone: 918-583-2266 Fax: 918-583-6094 www.aaon.com RL Series Installation, Operation, &a

9 FIRE, EXPLOSION OR CARBON MONOXIDE POISONING HAZAR