Aaon RN-140 Manuel d'utilisateur

RN SERIES Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units Installation, Operation, & Maintenance

10 UNIT HANDLING To prevent injury or death lifti

100 Table 47 - 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters Feature 1A Quantity / Size Type F, G, H, J, Q, R, S, T, U, V, W, Y, Z, 1, 2, 3

101 20” 20” 16” 16” Figure 51 - RN Series 6-8 and 10 ton Standard Filter Layout (Viewed from the Upstream Side of the Cooling Coil) 25” 25” 2

102 20” 20” 20” 25” 25” Figure 53 - RN Series 16-25 and 30 ton Standard Filter Layout (Viewed from the Upstream Side of the Cooling Coil) 2

103 24” 24” 24” 24” 12” 12” 12” Figure 55 - RN Series 50-, 60, and 70 ton Standard Filter Layout (Viewed from the Upstream Side of the

104 20” 20” 20” 20” 20” 16” 24” 24” 24” Figure 57 - RN Series 55, 65, and 75 ton Standard Filter Layout, 4” Filters (Viewed from

105 20” 20” 20” 20” 20” 20” 20” 16” 24” 24” 24” Figure 59 - RN Series 90-140 ton Standard Filter Layout, 4” Filters and

106 Appendix A - Heat Exchanger Corrosion Resistance Corrosion Resistance of Copper and Stainless Steel in Brazed Plate Heat Exchangers - Points to

107 Water Containing Concentration (mg/l or ppm) Time Limits - Analyze Before AISI 316 SMO 254 Copper Alloy Nickel Alloy Total Hardness (°dH) 4.0-8.5

108 Appendix B - Thermistor Temperature vs. Resistance ValuesDeg C Deg F Resistance (kOhms) -40 -40 2889.6 -35 -31 2087.22 -30 -22 1522.20 -25 -13 11

109 RN Series Startup Form Date:______________ Job Name:_____________________________________________________________________ Address:______________

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

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

111 Refrigeration System 1 – Cooling Mode Pressure Saturated Temperature Line Temperature Sub-cooling Superheat Discharge N/A N/A Suction N/A

112 Refrigeration System 4 – Heating Mode (Heat Pump only) Pressure Saturated Temperature Line Temperature Sub-cooling Superheat Discharge N/A N/

113 Electric Preheating Limit Lockout Aux. Limit Lockout Outside Air Temperature Setpoint ________°F Preheat Leaving Air Temperature Setpoint _

114 Literature Change History May 2007 Update of IOM unit service clearances. Length of front and back clearances from 60” to 48” and length of lef

115 April 2011 Updated the condenser water connection sizes in Table I12 and added Table I13 – SMO 254 Brazed Plate Heat Exchanger Water Connections

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

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

13 RN Series Feature String Nomenclature BASE MODEL SERIES AND GENERATION RN UNIT SIZE 006 = 6 ton Capacity 007 = 7 ton Capacity 008 = 8 ton Capa

14 RN Series Feature String Nomenclature Model Option A: COOLING/HEAT PUMP A3: COIL COATING 0 = Standard 1 = Polymer E-Coated Evap. and Cond. 2 = St

15 RN Series Feature String Nomenclature B2: HEATING DESIGNATION 0 = No Heating 1 = Heat 1 2 = Heat 2 3 = Heat 3 4 = Heat 4 6 = Heat 6 7 = Heat 7 8

16 RN Series Feature String Nomenclature Feature 1: RETURN/OUTSIDE AIR 1B: RETURN/EXHAUST AIR BLOWER CONFIGURATION 0 = Standard – None A = 1 Blower

17 RN Series Feature String Nomenclature Feature 2: OUTSIDE AIR CONTROL 0 = Standard - None A = 3 Position Actuator - Sensible Limit B = 3 Position

18 RN Series Feature String Nomenclature Feature 5: SUPPLY AIR OPTIONS 5A: SUPPLY AIR BLOWER CONFIGURATION 0 = 1 Blower + Standard Eff. Motor A = 2

19 RN Series Feature String Nomenclature 6C: FILTER OPTIONS 0 = Standard A = Clogged Filter Switch B = Magnehelic Gauge C = Options A + B Feature

20 RN Series Feature String Nomenclature Feature 11: SAFETY OPTIONS 0 = Standard A = Return and Supply Air Firestat B = Return Air Smoke Detector C

21 RN Series Feature String Nomenclature Feature 13: SPECIAL CONTROLS 0 = Terminal Block for Thermostat Control D = VAV Unit Controller - VAV Cool

22 RN Series Feature String Nomenclature Feature 18: CUSTOMER CODE 0 = Standard Feature 19: CODE OPTIONS 0 = Standard - ETL U.S.A. Listing B = Chi

23 RN Series Feature String Nomenclature Feature 23: TYPE B = Standard - AAON Gray Paint U = Special Pricing Authorization + Special Paint X = Spec

24 General Information RN Series packaged rooftop units, heat pumps and outdoor air handling units have been designed for outdoor installation

25 Installation of RN Series units must conform to the ICC standards of the International Mechanical Code, the International Building Code, an

26 Figure 1 - Lockable Handle The warranty card must be completed in full and returned to AAON not more than 3 months after unit is delivere

27 Never cut off the main power supply to the unit, except for servicing, emergency, or complete shutdown of the unit. When power is cut off

28 Should overheating occur with a gas heat exchanger, or the gas supply fail to shut off, shut off the manual gas valve to the furnace before

29 Wiring Diagrams Unit specific wiring diagrams are laminated and affixed inside the controls compartment door. Condensate Drain Pan Unit requires

Table of Contents Safety ...

30 Installation AAON equipment has been designed for quick and easy installation. Locating Units The curb should be mounted first and must be

31 Table 4 - C Cabinet Unit Clearances Location Unit Size 16-25 and 30 tons Front - (Controls Side) 48” Back - (Outside Air) 48” *Left Side *21” Rig

32 Be careful to install the provided neoprene gasket according to the following figure prior to setting the unit on the curb.

33 Figure 5 - RN Series 6-8 and 10 ton Unit Gasket Locations

34 Figure 6 - RN Series 9 and 11-15 ton Unit Gasket Locations

35 Figure 7 - RN Series 16-25 and 30 ton Unit Gasket Locations

36 Figure 8 - RN Series 26, 31-50, 60, and 70 ton Unit Gasket Locations

37 Forklifting the Unit (6-25 and 30 ton) 6-25 and 30 ton units can be lifted using a forklift. 9, 11-25 and 30 ton units must have forks 72”

38 with the outside air hood in the open position. Before lifting unit, be sure that all shipping material has been removed from unit. Secure

39 Figure 11 - Lifting Details of a 6-25 and 30 ton Energy Recovery Wheel or Power Return Unit Figure 12 - Lifting Details of a 26, 31-50, 60 and

4 Checking Liquid Sub-Cooling ... 76 Checking Evaporator S

40 Figure 13 - Lifting Details of a 55, 65 and 75-140 ton Unit

41 Duct Connection Note: If outside air will be in contact with the air tunnel base of an A, B or C cabinet unit (6-25 and 30 tons), the unit

42 Seismic Curb Installation Using a standard curb with a seismic unit will void the certification of the unit. All mounting details li

43 Figure 16 - Seismic Solid Bottom Curb without Filters Cross Section Figure 17 - Seismic Solid Bottom Curb without Filters Detail A Figure 18

44 Figure 19 - Seismic Rigid Mount Curb

45 Condenser Hail Guards 90-140 ton Units Condenser hail guards fold down and become a condenser coil shipping cover on 90-140 ton RN Series un

46 Figure 21 - 90-140 ton Condenser Coil Guard Installation Instructions 2 Outside Air Rain Hood Rain hood must be opened before startup of the un

47 Attach the side pieces to the top of the hood using the provided screws and attached the side pieces to the end of the unit through the flange. A

48 Failure to attach and seal the end of unit with the flashings may result in water leakage into the curb. Figure 25 - Factory Suppl

49 Electrical Verify the unit nameplate agrees with power supply. Connect power and control wiring to the unit as shown in Figure I12 and in the uni

5 Index of Tables and Figures Tables: Table 1 - Electric and Gas Heating Capacities ...

50 Figure 29 - Front View of Utility Entry and Power Switch from Control Compartment (55, 65 and 75-140 ton Units) Size supply conductors based

51 Wire control signals to the unit’s low voltage terminal block located in the controls compartment. If an

52 Total Wire Distance Allowable = (Quantity of Control Wires) x (Control Wire Distance) Take the total wire distance allowable and divide by

53 Table 13 - 55, 65 and 75-140 ton Gas Connections Model Option B2 Input MBH Connections Quantity Size M 800 2 1” NPT N 1600 2 1-1/2” NPT P 2400 Af

54 Do not use gas piping smaller than unit gas connections. Natural gas pipe runs longer than 20 feet and propane gas pipe runs longer t

55 Table 16 - Gas Piping Supports Pipe Size Support Intervals 1/2” to 3/4” Every 6 ft 3/4” to 1” Every 8 ft 1-3/4” or Larger (Horizontal) Every 10 ft

56 Figure 31 - Example 6-25 and 30 ton through the Base Gas Piping Leak Testing All components of gas supply system, including manual shut

57 All gas fired heat exchangers are completely tested at the factory before shipment. This will remove nearly all of the oils that have been

58 Refrigerant-to-Water Heat Exchanger Condenser water pump, condenser water piping, cooling tower or geothermal loop, pressure gauges, stra

59 Freezing Water in the Heat Exchanger This product contains one or more refrigerant-to-water heat exchangers. A refrigerant

6 Table 42 - 55, 65, and 75 ton Unit Filters ... 98 Table 43 - 90-1

60 unit can operate without damaging unit components. Table 18 - Standard Brazed Plate Heat Exchanger Water Connections Model

61 used as concentrated chemicals can cause corrosion. Never use hydrochloric acid (muriatic acid) or chlorine as it will corrode stainless

62 penetrate the roof external to the unit itself. The drain line should be pitched away from the unit at least 1/8 inch per foot. On longer runs an

63 Electric Preheat The modulating electric preheat option is designed to temper the incoming outside air to the unit based on an enabl

64 proper operation efficiency and building occupant comfort. Normal maintenance requires periodic inspection of filters, the cassette

65 Confirm that the wheel rotates freely. Apply power to the unit and confirm rotation. Airflow Balancing and Checking High performance systems comm

66 adsorb and desorb moisture and also build up so as to reduce airflow. In a reasonably clean indoor environment such as a school or

67 ventilators. In each case, it is recommended that the following considerations be addressed: Accessibility The cassette and all its operativ

68 Diameter Seal Adjustment Hub Seal Adjustment Service Segment Installation & Replacement Wheel segments are secured to the

69 center of the wheel and inwards against the spoke flanges. If hand pressure does not fully seat the segment, insert the flat tip of a screw

7 Figure 35 - RET with Pin in Groove 4 ... 73 Figure 36 - Fan

70 12. Apply power to wheel and ensure that the wheel rotates freely without interference. Belt Replacement

71 Startup (See back of the manual for startup form.) During startup, it is necessary to perform routine checks on the p

72 Figure 32 - Supply Fan Banding Power Return Axial Flow Fans (16-25 and 30 tons) Blade Pitch Angle Setting Instructions Step 1: Determin

73 Figure 33 - Fan with the HUB on the Top and RET on the Bottom Step 3: Determine the direction of rotation Right, R, is clockwise when facin

74 Step 7: Determine the current blade pitch and the pin location for the new blades Table 23 - Pin Location Type Bushing Mount Blade Pitch Angl

75 Step 4: Remove the fan blades and replace the pitch pins Figure 39 - Pin Groove Location Figure 40 - Pitch Pin Location Figure 41 - Example

76 Before Charging Unit being charged must be at or near full load conditions before adjusting the charge. Units equipped with hot gas re

77 Table 25 - Acceptable Refrigeration Circuit Values Air-Cooled Cond./Air-Air Heat Pump Sub-Cooling 12-18°F Sub-Cooling with Hot Gas Reheat 15-22°

78 Table 26 - R-410A and R-22 Refrigerant Temperature-Pressure Chart PSIG PSIG PSIG PSIG PSIG (F) R-410A R-22 (F) R-410A R-22 (F) R-410A R-2

79 Gas Heater Instructions Figure 42 - Gas Heater Instructions

8 Safety ELECTRIC SHOCK, FIRE OR EXPLOSION HAZARD Failur

80 Condenser Fan Electronically Commutated Motor (ECM) Startup The fan cycling option uses a fan cycle switch to switch between one of the dis

81 VFD Controlled Condenser Fan Startup With Customer Provided Unit Controls the VFD’s are factory provided and factory programmed. VFD’s rec

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

83 Electric Heating Operation When a call for heating (G and W1, W2, etc.) is made the supply blower motors and electric resistance heaters

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

85 If induced draft blower/motor assembly has to be replaced, care must be taken to provide an airtight seal between the blower housing and the burne

86 Condenser Fans (6-25 and 30 ton) Condenser fans and motors can be removed and reinstalled as individual assemblies. Removal T

87 Evaporator Coil (6-25 and 30 ton) Removal Evacuate refrigerant from the systems. Remove the TXV bulbs from the suction lines. Disc

88 normal flow rate, preferably in a back-flush mode. After cleaning, the heat exchanger must be rinsed with clean water. A solution of 1-2% s

89 chloride remover to remove soluble salts and revitalize the unit. Recommended Coil Cleaner The following cleaning agent, assuming it is used in

9 FIRE, EXPLOSION OR CARBON MONOXIDE POISONING HAZA

90 Supply Fans Lubrication All original fan motors and bearings are furnished with factory lubrication. Some applicat

91 the inlet. A screw driver or crowbar can be used to help accomplish this. Use the pry slots on the back side of the motor mount. Pull the

92 4. On/Off LED = Alt. G/R Flashing Phase Loss LED = Green 5. On/Off LED = Green Phase Loss LED = Green Powering up with no voltage present: 1. On

93 pattern according to the capacity demand signal of the system. The following table shows the linear relationship between the deman

94 filters must point towards the blower. (RAB = Return Air Bypass, PE = Power Exhaust and PR = Power Return) Table 29 - 6-8 and 10 ton Pre Filt

95 Table 33 - 50, 60, and 70 ton Pre Filters Feature 6A Quantity / Size Type 0 No Pre Filters A 24 / 12” x 24” x 2” Pleated, 30% Eff, MERV 8 B 6 / 1

96 Table 36 - 6-8 and 10 ton Unit Filters Feature 6B Quantity / Size Type 0 4 / 16” x 20” x 2” Pleated, 30% Eff, MERV 8 with RAB, Feature A2 = Q, R 2

97 Table 38 - 13 and 15 ton Unit Filters Feature 6B Quantity / Size Type 0 4 / 20” x 25” x 2” Pleated, 30% Eff, MERV 8 with RAB, Feature A2 = Q, R 6

98 Table 40 - 26, 31, and 40 ton Unit Filters Feature 6B Quantity / Size Type 0 8 / 24” x 24” x 2” Pleated, 30% Eff, MERV 8 with RAB, Feature A2 = Q,

99 Table 43 - 90-140 ton Unit Filters Feature 6B Quantity / Size Type 0 35 / 18” x 20” x 2” Pleated, 30% Eff, MERV 8 B 21 / 20” x 24” x 4” & 7 /