428 04 5001 00 April 2008 TECHNICAL SUPPORT MANUAL Split System Heat Pump N2H3 DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manuals that may apply to the product. DANGER - Immediate hazards which will result in severe personal injury or death. WARNING - Hazards or unsafe practices which could result in severe personal injury or death. CAUTION - Hazards or unsafe practices which may result in minor personal injury or product or property damage. NOTE - Used to highlight suggestions which will result in enhanced installation, reliability, or operation. Signal Words in Manuals The signal word WARNING is used throughout this manual in the following manner: The signal word CAUTION is used throughout this manual in the following manner: Signal Words on Product Labeling Signal words are used in combination with colors and/or pictures on product labels. WARNING Safety Labeling and Signal Words ! ! CAUTION WARNING TABLE OF CONTENTS Wiring Diagrams 2 - 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charging Chart 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tech Labels (Expanded Data) 5 - 12 . . . . . . . . . . . . . . . . Cooling Multipying Factors 13 - 16 . . . . . . . . . . . . . . . . . . Heating Multipying Factors 17 - 20 . . . . . . . . . . . . . . . . . Exploded Drawings 21 - 23 . . . . . . . . . . . . . . . . . . . . . . . . Parts List 24 - 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model Number Identification 27 . . . . . . . . . . . . . . . . . . . . ! WARNING DEATH, PERSONAL INJURY, AND/OR PROPERTY DAMAGE HAZARD Failure to carefully read and follow this warning could result in equipment malfunction, property damage, personal injury and/or death. Installation or repairs made by unqualified per‐ sons could result in equipment malfunction, prop‐ erty damage, personal injury and/or death. The information contained in this manual is in‐ tended for use by a qualified service technician fa‐ miliar with safety procedures and equipped with the proper tools and test instruments. Installation must conform with local building codes and with the National Electrical Code NFPA70 current edition or Canadian Electrical Code Part 1 CSA C.22.1.
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TECHNICAL SUPPORT MANUAL Split System Heat Pump N2H3
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428 04 5001 00 April 2008
TECHNICAL SUPPORT MANUALSplit System Heat Pump
N2H3
DANGER, WARNING, CAUTION, andNOTEThe signal words DANGER, WARNING,CAUTION, and NOTE are used to identify levels ofhazard seriousness. The signal word DANGER isonly used on product labels to signify an immediatehazard. The signal words WARNING, CAUTION,and NOTE will be used on product labels andthroughout this manual and other manuals that mayapply to the product.
DANGER - Immediate hazards which will result insevere personal injury or death.
WARNING - Hazards or unsafe practices whichcould result in severe personal injury or death.
CAUTION - Hazards or unsafe practices whichmay result in minor personal injury or product orproperty damage.
NOTE - Used to highlight suggestions which willresult in enhanced installation, reliability, oroperation.
Signal Words in Manuals
The signal word WARNING is used throughout thismanual in the following manner:
The signal word CAUTION is used throughout thismanual in the following manner:
Signal Words on Product Labeling
Signal words are used in combination with colorsand/or pictures on product labels.
DEATH, PERSONAL INJURY, AND/OR PROPERTYDAMAGE HAZARD
Failure to carefully read and follow this warningcould result in equipment malfunction, propertydamage, personal injury and/or death.
Installation or repairs made by unqualified per‐sons could result in equipment malfunction, prop‐erty damage, personal injury and/or death.
The information contained in this manual is in‐tended for use by a qualified service technician fa‐miliar with safety procedures and equipped withthe proper tools and test instruments.
Installation must conform with local buildingcodes and with the National Electrical CodeNFPA70 current edition or Canadian ElectricalCode Part 1 CSA C.22.1.
David
Logo on Grey - Title
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2428 04 5001 00
Model Sizes: 18, 24, 30, 36, 42, 48
1. Symbols are electrical representation only.
2. Compressor and fan motor furnished with inherent thermal protection.
3. To be wired in accordance with National Electric N.E.C. and local codes.
4. N.E.C. class 2, 24 V circuit, min. 40 VA required, 60 VA on units installed with LLS.
5. Connection for typical heat pump thermostat. For other arrangements see installation instructions.
6. Use copper conductors only. Use conductors suitable for at least 75°C (167°F).
7. If indoor section has a transformer with a grounded secondary, connect the grounded side to “C” on the circuit board.
8. When start capacitor and relay are installed, start thermistor (PTC) is not used.
9. CH not used on all units.
10. If any of the original wire, as supplied, must be replaced, use the same or equivalent wire.
11. Check all electrical connections inside control box for tightness.
12. Do not attempt to operate unit until service valves have been opened.
13. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow pressures to equalize between high and low side before starting.
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428 04 5001 003
Model Size: 60
1. Symbols are electrical representation only.
2. Compressor and fan motor furnished with inherent thermal protection.
3. To be wired in accordance with National Electric N.E.C. and local codes.
4. N.E.C. class 2, 24 V circuit, min. 40 VA required, 60 VA on units installed with LLS.
5. Connection for typical heat pump thermostat. For other arrangements see installation instructions.
6. Use copper conductors only. Use conductors suitable for at least 75°C (167°F).
7. If indoor section has a transformer with a grounded secondary, connect the grounded side to “C” on the circuit board.
8. When start capacitor and relay are installed, start thermistor (PTC) is not used.
9. CH not used on all units.
10. If any of the original wire, as supplied, must be replaced, use the same or equivalent wire.
11. Check all electrical connections inside control box for tightness.
12. Do not attempt to operate unit until service valves have been opened.
13. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow pressures to equalize between high and low side before starting.
TECHNICAL SUPPORT MANUAL Split System Heat Pump: N2H3
4 428 04 5001 00
R-22 CHARGING CHART� Find the required Subcooling Temperature on the unit Rating Plate. Use the closest column on the chart below
(5, 10, 15, or 20) .
� Add or remove refrigerant until both the Liquid Line Temperature and Liquid Pressure agree with chart data.
Measured Liquid Pressure (psig)
Rating Plate (required) Subcooling Temperature (°F)
5 10 15 20
R-22 Required Liquid Line Temperature (°F)
163 83 78 73 68
171 86 81 76 71
179 89 84 79 74
187 92 87 82 77
196 95 90 85 80
205 98 93 88 83
214 101 96 91 86
223 104 99 94 89
233 107 102 97 92
243 110 105 100 95
253 113 108 103 98
264 116 111 106 101
274 119 114 109 104
285 122 117 112 107
297 125 120 115 110
309 128 123 118 113
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428 04 5001 005
MULTIPLYING FACTORS
(Refer to pages 6-12)
† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25' line set. If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.
†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 °F db If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.
* System amps are total of indoor and outdoor amps.
‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below. (Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)
Sensible Capacity at Indoor db LOWER than 80 °F = ( MBh x S/T ) - ( 80 - Indoor db ) x 835 x Indoor CFM1000( )
Sensible Capacity at Indoor db HIGHER than 80 °F = ( MBh x S/T ) +( Indoor db - 80 ) x 835 x Indoor CFM
1000( )
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428 04 5001 0013
COOLING Multiplying Factors for other Indoor Combinations
TECHNICAL SUPPORT MANUAL Split System Heat Pump: N2H3
428 04 5001 00 21
A
G
2
L
B
32
3
C
E
F
D
Nut, AcornGuardFan
MotorFan
Raceway
Fan
Top, Cover
Grille, Inlet
Base, Pan
ServicePanel
ControlBox
ControlBoxCover
NOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.Please refer to Parts List forexact parts listing.
TECHNICAL SUPPORT MANUAL Split System Heat Pump: N2H3
22 428 04 5001 00
NOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.Please refer to Parts List forexact parts listing.
6 Coil, Assembly
1 Compressor
35 Heater, CRKC( When Used )
11 Bolt, Shoulder
10 Gromet, Comp.
Valve Service ,Suction7
Rev. ,Valve
23 Muffler
19 Switch, High Pressure
24 Filter Drier
G Base PanAssembly
N Support, Coil
36Switch Temp. CC Heater
( When Used )
16Capillary, Assy.
12
27Blanket Sound( When Used )
20Distributor
Sensor Defrost 22
Plug Compressor 9
Accumulator 15
Coil, Rev. Valve 13
Switch, Low Press. 17
Valve Service,Liquid
8
Piston
Retainer ,Piston( When Used)
18
31
30
29
Clip, Accum.
Cushion, Accum.
,
14
TECHNICAL SUPPORT MANUAL Split System Heat Pump: N2H3
428 04 5001 00 23
Box, ControlD
25ComfortAlert
34 HarnessAssembly
33 Lug, GroundContactor4
PStrapCapacitor
Capacitor 5
CTL, 2 SPD, FAN21
Board, CircuitDefrost
26
Module
(When used)(When used)
NOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.Please refer to Parts List forexact parts listing.
TECHNICAL SUPPORT MANUAL Split System Heat Pump: N2H3