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INSTALLATION INSTRUCTIONS
13 & 14.5 SEER SERIES
HEAT PUMPS
1
1
⁄
2
- 5 TONS FEATURING
NEW INDUSTRY STANDARD
R-410A REFRIGERANT
R-410
!
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION!
!
WARNING
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO
QUALIFIED, LICENSED SERVICE PERSONNEL FOR
PROPER INSTALLATION, ADJUSTMENT AND OPERATION
OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY
BEFORE ATTEMPTING INSTALLATION OR OPERATION.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT
IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR
MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL
SHOCK, PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
ISO 9001:2008
DO NOT DESTROY THIS MANUAL
PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE BY A SERVICEMAN
92-20522-75-01
SUPERSEDES 92-20522-75-00
2
TABLE OF CONTENTS
1.0
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Checking Product Received. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4
Electrical and Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.0
LOCATING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1
Corrosive Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2
Heat Pump Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3
Operational Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4
For Units With Space Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5
Customer Satisfaction Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.6
Unit Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7
Factory-Preferred Tie-Down Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.0
REFRIGERANT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.0
REPLACEMENT UNITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.0
INDOOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.0
INTERCONNECTING TUBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1
Vapor & Liquid Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2
Maximum Length of Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3
Vertical Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.4
Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.5
Tubing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.6
Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.0
DEMAND DEFROST CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1
Defrost Initiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.2
Defrost Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.3
Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.4
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.5
Trouble Shooting Demand Defrost Operation . . . . . . . . . . . . . . . . . . . . . . . 15
8.6
High/Low Pressure Control Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.7
Enhanced Feature Defrost Control Diagnostic Codes . . . . . . . . . . . . . . . . . 16
9.0
EVACUATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.0 START UP & PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
11.0 CHECKING AIRFLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12.0 CHECKING REFRIGERANT CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12.1 Charging By Liquid Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12.2 Charging By Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
12.3 Final Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13.0 ELECTRICAL WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13.1 Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13.2 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13.3 Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
14.0 FIELD INSTALLED ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
14.1 Compressor Crankcase Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
14.2 Low Ambient Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
14.3 High Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
14.4 Heat Pump Thermostat Warning Light Kit RXPX-D01. . . . . . . . . . . . . . . . . 20
15.0 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
15.1 Single Pole Compressor Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
16.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.1 Electrical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.2 Cooling Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16.3 Heating Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
16.4 Defrost Mechanical Checks Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
16.5 Subcooling Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
16.6 General Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
16.7 Service Analyzer Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
17.0 WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
17.1 Enhanced Defrost Control - PSC Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
17.2 Enhanced Defrost Control - ECM Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
1.0 SAFETY INFORMATION
!
WARNING
Disconnect all power to unit before starting maintenance. Failure to do so can cause electrical shock resulting in severe personal injury or death.
!
WARNING
Turn off electric power at the fuse box or service panel before making any electrical connections.
Also, the ground connection must be completed before making line voltage connections. Failure to do so can result in electrical shock, severe personal injury or death.
!
WARNING
These instructions are intended as an aid to qualified licensed service personnel for proper installation, adjustment and operation of this unit.
Read these instructions thoroughly before attempting installation or operation. Failure to follow these instructions may result in improper installation, adjustment, service or maintenance possibly resulting in fire, electrical shock, property damage, personal injury or death.
!
WARNING
The unit must be permanently grounded. Failure to do so can cause electrical shock resulting in severe personal injury or death.
!
WARNING
The manufacturer’s warranty does not cover any damage or defect to the heat pump caused by the attachment or use of any components.
Accessories or devices (other than those authorized by the manufacturer) into, onto or in conjunction with the heat pump. You should be aware that the use of unauthorized components, accessories or devices may adversely affect the operation of the heat pump and may also endanger life and property. The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized components, accessories or devices.
CAUTION
When coil is installed over a finished ceiling and/or living area, it is recommended that a secondary sheet metal condensate pan be constructed and installed under entire unit. Failure to do so can result in property damage.
CAUTION
Single-pole contactors are used on all standard single-phase units up through 5 tons. Caution must be exercised when servicing as only one leg of the power supply is broken with the contactor.
3
4
MATCH ALL COMPONENTS:
• OUTDOOR UNIT
• INDOOR COIL/METERING DEVICE
• INDOOR AIR HANDLER/FURNACE
• REFRIGERANT LINES
2.0 GENERAL
!
WARNING
The manufacturer’s warranty does not cover any damage or defect to the heat pump caused by the attachment or use of any components.
Accessories or devices (other than those authorized by the manufacturer) into, onto or in conjunction with the heat pump. You should be aware that the use of unauthorized components, accessories or devices may adversely affect the operation of the heat pump and may also endanger life and property. The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized components, accessories or devices.
2.1 CHECKING PRODUCT RECEIVED
Upon receiving unit, inspect it for any shipping damage. Claims for damage, either apparent or concealed, should be filed immediately with the shipping company.
Check heat pump model number, electrical characteristics and accessories to determine if they are correct. Check system components (evaporator coil, condensing unit, evaporator blower, etc.) to make sure they are properly matched.The information contained in this manual has been prepared to assist in the proper installation, operation and maintenance of the heat pump system. Improper installation, or installation not made in accordance with these instructions, can result in unsatisfactory operation and/or dangerous conditions, and can cause the related warranty not to apply.
Read this manual and any instructions packaged with separate equipment required to make up the system prior to installation. Retain this manual for future reference.
To achieve optimum efficiency and capacity, the indoor cooling coils listed in the heat pump specification sheet should be used.
2.2 APPLICATION
Before installing any heat pump equipment, a duct analysis of the structure and a heat gain calculation must be made. A heat gain calculation begins by measuring all external surfaces and openings that gain heat from the surrounding air and quantifying that heat gain. A heat gain calculation also calculates the extra heat load caused by sunlight and by humidity removal.
There are several factors that the installers must consider:
• Outdoor unit location
• System refrigerant charge
• Indoor unit blower speed
• System air balancing
•
•
•
•
Proper equipment evacuation
Indoor unit airflow
Supply and return air duct design and sizing
Diffuser and return air grille location and sizing
2.3 DIMENSIONS (SEE FIGURE 1)
FIGURE 1
DIMENSIONS
A-00008
H
L
w
AIR DISCHARGE: ALLOW
60” [1524 mm] MINIMUM
CLEARANCE.
AIR INLETS
(LOUVERED PAN-
ELS) ALLOW 6”
[152.4 mm]
MINIMUM
CLEARANCE
SEE DETAIL A
SERVICE ACCESS
ALLOW 24” [609.6 mm]
CLEARANCE
NOTE: GRILLE APPEARANCE
MAY VARY.
2"
[50.8 mm]
BASERAIL*
*The 3, 3
1
⁄
2
, 4 & 5 ton models do not feature a baserail.
DIMENSIONAL DATA
13 SEER 18, 24 —
30
14.5 SEER
Height “H” (in.) [mm]
Length “L” (in.) [mm]
Width “W” (in.) [mm]
— 18, 24
—
26 1 /
4
[666.7] 26 1 /
4
[666.7] 26 1 /
4
[666.7]
23 5 /
8
[600] 27 5 /
8
[701.6] 27 5 /
8
[701.6]
23 5 /
8
[600]
27 5 /
8
[701.6] 27 5 /
8
[701.6]
BASE PAN (BOTTOM VIEW)
DO NOT OBSTRUCT DRAIN HOLES
(SHADED).
36 42, 48, 60
30 36, 42, 48, 60
27 3 /
8
[695.3] 35 3 /
8
[898.5]
31 5 /
8
[803.2] 31 5 /
8
[803.2]
31 5 /
8
[803.2] 31 5 /
8
[803.2]
5
6
2.4 ELECTRICAL & PHYSICAL DATA (SEE TABLE 1)
TABLE 1
ELECTRICAL AND PHYSICAL DATA – 13 SEER
ELECTRICAL DATA
Model
Number
Compressor
Phase
Frequency (Hz)
Voltage (Volts)
Rated Load
Amperes
(RLA)
Locked Rotor
Amperes
(LRA)
Rev.7/29/2009
18 1-60-208-230 9/9 48
24
30
1-60-208-230
1-60-208-230
12.8/12.8
14.1/14.1
58.3
73
36
42
48
60
1-60-208-230
1-60-208-230
1-60-208-230
1-60-208-230
17/17
21.8/21.8
21.8/21.8
26.3/26.3
96.7
112
117
134
Fan Motor
Full Load
Amperes
(FLA)
1.2
1.2
1.2
0.6
0.6
0.8
1.2
PHYSICAL DATA
Minimum
Circuit
Ampacity
Amperes
Fuse or HACR
Circuit Breaker
Minimum
Amperes
Maximum
Amperes
Face Area
Sq. Ft.
[m 2 ]
Outdoor Coil
No.
Rows
CFM
[L/s]
Refrig.
Per
Circuit
Oz. [g]
12/12
17/17
19/19
23/23
29/29
29/29
35/35
15/15
20/20
25/25
30/30
35/35
35/35
45/45
20/20
25/25
30/30
35/35
50/50
50/50
60/60
11.06 [1.03]
11.06 [1.03]
13.72 [1.27]
16.39 [1.52]
21.85 [2.03]
21.85 [2.03]
21.85 [2.03]
1
1
1
1
1
1
1
1700 [802]
2370 [1118]
91 [2580]
91 [2580]
Net
Lbs. [kg]
Weight
Shipping
Lbs. [kg]
144 [65.3] 152 [68.9]
130 [59] 138 [62.6]
2800 [1321] 101 [2863] 198 [89.8] 208 [94.3]
3575 [1687] 109 [3090] 215 [97.5] 227 [103]
3575 [1687] 150 [4252] 202 [91.6] 214 [97.1]
3575 [1687] 141 [3997] 205 [93] 217 [98.4]
3575 [1687] 228 [6464] 209 [94.8] 221 [100.2]
ELECTRICAL AND PHYSICAL DATA – 14.5 SEER
ELECTRICAL DATA
Model
Number
Compressor
Phase
Frequency (Hz)
Voltage (Volts)
Rated Load
Amperes
(RLA)
Locked Rotor
Amperes
(LRA)
Rev. 7/29/2009
18 1-60-208/230 9/9 48
24
30
36
42
48
60
1-60-208/230
1-60-208/230
1-60-208/230
1-60-208/230
1-60-208/230
1-60-208/230
12.8/12.8
14.1/14.1
16.7/16.7
17.9/17.9
21.8/21.8
26.4/26.4
58.3
73
79
112
117
134
Fan Motor
Full Load
Amperes
(FLA)
0.08
0.08
1.23
1.3
1.33
2.8
2.8
Minimum
Circuit
Ampacity
Amperes
Fuse or HACR
Circuit Breaker
Minimum
Amperes
Maximum
Amperes
Face Area
Sq. Ft.
[m 2 ]
Outdoor Coil
No.
Rows
CFM
[L/s]
PHYSICAL DATA
Refrig.
Per
Circuit
Oz. [g]
13/13
17/17
19/19
23/23
24/24
31/31
36/36
15/15
25/25
25/25
30/30
30/30
40/40
45/45
20/20 13.72 [1.27]
25/25 13.72 [1.27]
30/30
35/35
40/40
50/50
60/60
16.39 [1.52]
21.85 [2.03]
21.85 [2.03]
21.85 [2.03]
21.85 [2.03]
1
1
1
1
1
2
2
2590 [1222]
2590 [1222]
101.6 [2880]
100.8 [2858]
Net
Lbs. [kg]
Weight
154 [69.9]
155 [70.3]
Shipping
Lbs. [kg]
164 [74.4]
165 [74.8]
2595 [1225] 117.8 [3340] 118.5 [53.8] 181 [82.1]
3575 [1687] 136.5 [3870] 193 [87.5] 207 [93.9]
3575 [1687] 162.4 [4604] 193 [87.5] 208 [94.3]
3360 [1586] 258.4 [7326] 265 [120.2] 280 [127]
3360 [1586] 284 [8051] 265 [120.2] 280 [127]
NOTES:
➀ 20 Fins per inch [mm]
➁
Factory charged for 15 ft. [4.6 m] of line set
3.0 LOCATING UNIT
3.1 CORROSIVE ENVIRONMENT
The metal parts of this unit may be subject to rust or deterioration if exposed to a corrosive environment. This oxidation could shorten the equipment’s useful life.
Corrosive elements include, but are not limited to, salt spray, fog or mist in seacoast areas, sulphur or chlorine from lawn watering systems, and various chemical contaminants from industries such as paper mills and petroleum refineries.
If the unit is to be installed in an area where contaminants are likely to be a problem, special attention should be given to the equipment location and exposure.
• Avoid having lawn sprinkler heads spray directly on the unit cabinet.
• In coastal areas, locate the unit on the side of the building away from the waterfront.
• Shielding provided by a fence or shrubs may give some protection, but cannot violate minimum airflow and service access clearances.
• Elevating the unit off its slab or base enough to allow air circulation will help avoid holding water against the basepan.
Regular maintenance will reduce the build-up of contaminants and help to protect the unit’s finish.
!
WARNING
Disconnect all power to unit before starting maintenance. Failure to do so can cause electrical shock resulting in severe personal injury or death.
• Frequent washing of the cabinet, fan blade and coil with fresh water will remove most of the salt or other contaminants that build up on the unit.
• Regular cleaning and waxing of the cabinet with an automobile polish will provide some protection.
• A liquid cleaner may be used several times a year to remove matter that will not wash off with water.
Several different types of protective coil coatings are offered in some areas. These coatings may provide some benefit, but the effectiveness of such coating materials cannot be verified by the equipment manufacturer.
3.2 HEAT PUMP LOCATION
Consult local and national building codes and ordinances for special installation requirements. Following location information will provide longer life and simplified servicing of the outdoor heat pump.
NOTE: These units must be installed outdoors. No ductwork can be attached, or other modifications made, to the discharge grille. Modifications will affect performance or operation.
3.3 OPERATIONAL ISSUES
• IMPORTANT: Locate the unit in a manner that will not prevent, impair or compromise the performance of other equipment horizontally installed in proximity to the unit. Maintain all required minimum distances to gas and electric meters, dryer vents, exhaust and inlet openings. In the absence of National Codes, or manufacturers’ recommendations, local code recommendations and requirements will take presidence.
• Refrigerant piping and wiring should be properly sized and kept as short as possible to avoid capacity losses and increased operating costs.
• Locate the unit where water run off will not create a problem with the equipment. Position the unit away from the drip edge of the roof whenever possible.
Units are weatherized, but can be affected by the following: o Water pouring into the unit from the junction of rooflines, without protective guttering. Large volumes of water entering the heat pump while in operation can impact fan blade or motor life, and coil damage may occur to a heat pump if moisture cannot drain from the unit under freezing conditions.
o Freezing moisture, or sleeting conditions, can cause the cabinet to ice-over prematurely and prevent heat pump operation, requiring backup heat, which generally results in less economical operation.
• Closely follow clearance recommendations (See Figure 1).
o 24” [609.6 mm] to the service panel access o 60” [1524 mm] above heat pump fan discharge (unit top) to prevent recirculation o 6” [152.4 mm] to heat pump coil grille air inlets (per heat pump).
3.4 FOR UNITS WITH SPACE LIMITATIONS
In the event that a space limitation exists, we will permit the following clearances:
Single Unit Applications: Clearances below 6 inches [152.4 mm] will reduce unit capacity and efficiency. Do not reduce the 60-inch [1524 mm] discharge, or the 24inch [609.6 mm] service clearances.
Multiple Unit Applications: When multiple heat pump grille sides are aligned, a 6inch [152.4 mm] per unit clearance is recommended, for a total of 12" [304.8 mm] between two units. Two combined clearances below 12 inches [304.8 mm] will reduce capacity and efficiency. Do not reduce the 60-inch [1524 mm] discharge, or
24-inch [609.6 mm] service, clearances.
7
FIGURE 2
RECOMMENDED ELEVATED INSTALLATION
8
• Do not obstruct the bottom drain opening in the heat pump base pan. It is essential to provide defrost condensate drainage to prevent possible refreezing of the condensation. Provide a base pad for mounting the unit, which is slightly pitched away from the structure. Route condensate off the base pad to an area which will not become slippery and result in personal injury.
• Where snowfall is anticipated, the heat pump must be elevated above the base pad to prevent ice buildup that may crush the tubing of the heat pump coil or cause fin damage. Heat pump units should be mounted above the average expected accumulated snowfall for the area.
3.5 CUSTOMER SATISFACTION ISSUES
• The heat pump should be located away from the living, sleeping and recreational spaces of the owner and those spaces on adjoining property.
• To prevent noise transmission, the mounting pad for the outdoor unit should not be connected to the structure, and should be located sufficient distance above grade to prevent ground water from entering the unit.
3.6 UNIT MOUNTING
If elevating the heat pump, either on a flat roof or on a slab, observe the following guidelines.
• The base pan provided elevates the heat pump 2” [50.8 mm] above the base pad.
• If elevating a unit on a flat roof, use 4” x 4” [101.6 mm x 101.6 mm] (or equivalent) stringers positioned to distribute unit weight evenly and prevent noise and vibration (see Figure 2).
NOTE: Do not block drain openings shown in Figure 1.
• If unit must be elevated because of anticipated snow fall, secure unit and elevating stand such that unit and/or stand will not tip over or fall off. Keep in mind that someone may try to climb on unit.
3.7 FACTORY-PREFERRED TIE-DOWN METHOD
INSTRUCTIONS:
IMPORTANT: These instructions are intended as a guide to securing equipment for windload ratings of “120 MPH sustained wind load” and “3-second, 150 MPH gust.” While this procedure is not mandatory, the Manufacturer does recommend that equipment be properly secured in areas where high wind damage may occur.
STEP 1: Before installing, clear pad of any dirt or debris.
IMPORTANT: The pad must be constructed of industry-approved materials, and must be thick enough to accommodate the concrete fastener.
FIGURE 3
TIE-DOWN KIT ASSEMBLY
VIEW B
VIEW C
VIEW D
NOTE:
13 SEER
MODELS
18/24
30
36/42/48/60
14.5 SEER
MODELS
—
TIE DOWN
ASSEMBLY
VIEW
C
18/24
30/36/42/
48/60
D
B
L
23.63”
[600]
27.63”
[701.8]
31.63”
[803.4]
W
23.63”
[600]
27.63”
[701.8]
31.63”
[803.4]
TIE DOWN ASSEMBLY DIMENSIONS
A
3.5”
[88.9]
B
18.63”
[473.2]
C
1.94”
[49.7]
D
20.19”
[512.8]
5”
[127]
5.63”
[143]
21.13”
[536.7]
24.5”
[622.3]
2.75”
[69.8]
5.63”
[143]
23.38”
[593.8]
24.5”
[622.3]
E F
CENTER LINE CENTER LINE
OF UNIT OF UNIT
CENTER LINE CENTER LINE
OF UNIT OF UNIT
CENTER LINE
CENTER LINE
OF UNIT OF UNIT
9
10
STEP 2: Center basepan on pad, ensuring it is level.
STEP 3: Remove unit top panel by removing screws around the perimeter of top panel.
Disconnect fan motor leads from contactor and lay top panel aside taking care not to damage the fan.
STEP 4: Drill 4 or 6 holes (1/4” [6.35 mm] diameter) in the unit basepan only per figure 3.
STEP 5: Select and obtain appropriate concrete or lag screws and flat washers per figure 3.
STEP 6: Drill pilot holes in pad through the basepan clearance holes drilled in Step 4, ensuring that the holes are at least
1
⁄
4
” [6.35 mm] deeper than the concrete fastener being used. Use the concrete screw or lag screw manufacturer’s recommended hole diameter for the pilot holes.
STEP 7: Drive concrete screws or lag screws through
1
⁄
4
” [6.35 mm] clearance holes in unit base-pan and into the pad. Use flat washers under the head of the screws.
Snug screws to basepan.
NOTE: Do not over-tighten the concrete or lag screws. Doing so can weaken or strip the fastener and cause it to break or pull out.
STEP 8: Re-connect fan motor wire leads to contactor per the unit wiring diagram and lower unit top onto the unit. Take care to place the fan motor wire conduit in the slot in the top of the control box as the top is lowered onto the unit. Re-install screws that attach unit top to the unit.
STEP 9: Finish unit installation per Sections 4 - 14 in this manual.
4.0 REFRIGERANT CONNECTIONS
All units are factory charged with Refrigerant 410A for 15 ft. [4.6 m] of line set. All models are supplied with service valves. Keep tube ends sealed until connection is to be made to prevent system contamination.
5.0 REPLACEMENT UNITS
To prevent failure of a new heat pump unit, the existing tubing system must be correctly sized and cleaned or replaced. Care must be exercised that the expansion device is not plugged. For new and replacement units, a liquid line filter drier should be installed and refrigerant tubing should be properly sized. Test the oil for acid. If positive, a liquid line filter drier is mandatory.
6.0 INDOOR COIL
REFER TO INDOOR COIL MANUFACTURER’S INSTALLATION INSTRUCTIONS.
IMPORTANT: The manufacturer is not responsible for the performance and operation of a mismatched system, or for a match listed with another manufacturer’s coil.
6.1 LOCATION
Do not install the indoor coil in the return duct system of a gas or oil furnace.
Provide a service inlet to the coil for inspection and cleaning. Keep the coil pitched toward the drain connection.
CAUTION
When coil is installed over a finished ceiling and/or living area, it is recommended that a secondary sheet metal condensate pan be constructed and installed under entire unit. Failure to do so can result in property damage.
7.0 INTERCONNECTING TUBING
7.1 VAPOR AND LIQUID LINES
Keep all lines sealed until connection is made.
Make connections at the indoor coil first.
Refer to Line Size Information in Tables 2 and 3 for correct size and multipliers to be used to determine capacity for various vapor line diameters and lengths of run. The losses due to the lines being exposed to outdoor conditions are not included.
The factory refrigeration charge in the outdoor unit is sufficient for 15 feet [4.6 m] of interconnecting lines. The factory refrigeration charge in the outdoor unit is sufficient for the unit and 15 feet [4.6 m] of standard size interconnecting liquid and vapor lines. For different lengths, adjust the charge as indicated below.
1/4” ± .3 oz. per foot [6.35 mm ± 8.5 g]
5/16” ± .4 oz. per foot [7.9 mm ± 11.3 g]
3/8” ± .6 oz. per foot [9.5 mm ± 17 g]
1/2” ± 1.2 oz. per foot [12.7 mm ± 34 g]
7.2 MAXIMUM LENGTH OF LINES
The maximum length of interconnecting line is 150 feet [45.7 m]. Always use the shortest length possible with a minimum number of bends. Additional compressor oil is not required for any length up to 150 feet [45.7 m].
NOTE: Excessively long refrigerant lines cause loss of equipment capacity.
7.3 VERTICAL SEPARATION
Keep the vertical separation to a minimum. Use the following guidelines when installing the unit:
1.
DO NOT exceed the vertical separations as indicated on Table 3.
2.
It is recommended to use the smallest liquid line size permitted to minimize system charge which will maximize compressor reliability.
3.
Table 3 may be used for sizing horizontal runs.
7.4 TUBING INSTALLATION
Observe the following when installing correctly sized type “L” refrigerant tubing between the condensing unit and evaporator coil:
• If a portion of the liquid line passes through a hot area where liquid refrigerant can be heated to form vapor, insulating the liquid line is required.
• Use clean, dehydrated, sealed refrigeration grade tubing.
• Always keep tubing sealed until tubing is in place and connections are to be made.
• Blow out the liquid and vapor lines with dry nitrogen before connecting to the outdoor unit and indoor coil. Any debris in the line set will end up plugging the expansion device.
• As an added precaution it is recommended that a high quality, bi-directional filter drier is installed in the liquid line.
• Do not allow the vapor line and liquid line to be in contact with each other. This causes an undesirable heat transfer resulting in capacity loss and increased power consumption. The vapor line must be insulated.
• If tubing has been cut, make sure ends are deburred while holding in a position to prevent chips from falling into tubing. Burrs such as those caused by tubing cutters can affect performance dramatically, particularly on small liquid line sizes.
• For best operation, keep tubing run as short as possible with a minimum number of elbows or bends.
• Locations where the tubing will be exposed to mechanical damage should be avoided. If it is necessary to use such locations, the copper tubing should be housed to prevent damage.
11
12
• If tubing is to be run underground, it must be run in a sealed watertight chase.
• Use care in routing tubing and do not kink or twist. Use a tubing bender on the vapor line to prevent kinking.
• Route the tubing using temporary hangers, then straighten the tubing and install permanent hangers. Line must be adequately supported.
• The vapor line must be insulated to prevent dripping (sweating) and prevent performance losses. Armaflex and Rubatex are satisfactory insulations for this purpose. Use 1/2” [12.7 mm] minimum insulation thickness, additional insulation may be required for long runs.
• Check Table 2 for the correct vapor line size. Check Table 3 for the correct liquid line size.
7.5 TUBING CONNECTIONS
Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made.
• Use type “L” copper refrigeration tubing. Braze the connections with accepted industry practices.
• Be certain both refrigerant shutoff valves at the outdoor unit are closed.
• Clean the inside of the fittings before brazing.
• Remove the cap and schrader core from service port to protect seals from heat damage.
• Use an appropriate heatsink material around the copper stub and the service valves before applying heat.
• IMPORTANT: Do not braze any fitting with the TEV sensing bulb attached.
• Braze the tubing between the outdoor unit and indoor coil. Flow dry nitrogen into a service port and through the tubing while brazing.
• The service valves are not backseating valves. To open the valves, remove the valve cap with an adjustable wrench. Insert a 3/16” [4.7 mm] or 5/16” [7.9 mm] hex wrench into the stem. Back out counterclockwise.
• Replace the valve cap finger tight then tighten an additional 1/2 hex flat for a metal-to-metal seal.
7.6 LEAK TESTING
• Pressurize line set and coil through service fittings with dry nitrogen to 150
PSIG [1034.2 kPa] maximum. Leak test all joints using liquid detergent. If a leak is found, relieve pressure and repair.
TABLE 2
SUCTION LINE LENGTH/SIZE VS CAPACITY MULTIPLIER (R-410A)
Unit Size
Suction Line Connection Size
Suction Line Run - Feet [m]
1 1/2 Ton
3/4”
[19] I.D.
2 Ton
3/4”
[19] I.D.
5/8 [15.9] Opt.
3/4* [19] Std.
—
5/8 [15.9] Opt.
3/4* [19] Std.
—
2 1/2 Ton
3/4”
[19] I.D.
3 Ton
3/4”
[19] I.D.
3 1/2 Ton
7/8”
[22.2] I.D.
4 Ton
7/8”
[22.2] I.D.
5 Ton
7/8”
[22.2] I.D.
5/8 [15.9] Opt.
3/4* [19] Std.
7/8 [22.2] Opt.
5/8 [15.9] Opt.
3/4* [19] Std.
7/8 [22.2] Opt.
3/4 [19] Opt.
7/8* [22.2] Opt.
—
7/8 [22.2] Opt.
1 1/8* [28.6] Std.
—
7/8 [22.2] Opt.
1 1/8* [28.6] Std.
—
25’ [7.6]
—
Optional
Standard
Optional
Optional
50’ [15.24] Standard
— Optional
Optional
100’ [30.5] Standard
— Optional
Optional
150’ [45.7] Standard
— Optional
1.00
1.00
—
0.98
0.99
—
0.95
0.96
—
0.92
0.93
—
1.00
1.00
—
0.98
0.99
—
0.95
0.96
—
0.92
0.94
—
1.00
1.00
1.00
0.96
0.98
0.99
0.94
0.96
0.97
0.91
0.93
0.95
1.00
1.00
—
0.98
0.99
—
0.96
0.97
—
0.94
0.95
—
1.00
1.00
—
0.99
0.99
—
0.96
0.98
—
0.94
0.96
—
1.00
1.00
—
0.99
0.99
—
0.96
0.98
—
0.95
0.96
—
1.00
1.00
—
0.99
0.99
—
0.97
0.98
—
0.94
0.97
—
NOTES:
*Standard line size
Using suction line larger than shown in chart will result in poor oil return and is not recommended.
13
TABLE 3
LIQUID LINE SIZING (R-410A)
System
Capacity
1 1/2 Ton
2 Ton
2 1/2 Ton
3 Ton
3 1/2 Ton
4 Ton
5 Ton
Line Size
Connection Size
(Inch I.D.) [mm]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
Line Size
(Inch OD)
[mm]
25
Liquid Line Size
Outdoor unit above or below indoor coil
(Heat Pump Only)
Total Equivalent Length - Feet [m]
50 75 100 125
Maximum Vertical Separation - Feet [m]
150
1/4 [6.4] 25 [7.6] 40 [12.2] 25 [7.6] 9 [2.7] N/A N/A
5/16 [7.9] 25 [7.6] 50 [15.2] 62 [18.9] 58 [17.7] 53 [16.2] 49 [14.9]
3/8* [9.5] 25 [7.6] 50 [15.2] 75 [22.9] 72 [21.9] 70 [21.3] 68 [20.7]
1/4 [6.4] 23 [7.0] N/A N/A N/A
5/16 [7.9] 25 [7.6] 36 [10.9] 29 [8.8] 23 [7.0]
N/A
16 [4.9]
N/A
9 [2.7]
3/8* [9.5] 25 [7.6] 50 [15.2] 72 [21.9] 70 [21.3] 68 [20.7] 65 [19.8]
1/4 [6.4] 25 [7.6] N/A N/A N/A N/A N/A
5/16 [7.9] 25 [7.6] 49 [14.9] 38 [11.6] 27 [8.3] 17 [5.2] 6 [1.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 65 [19.8] 62 [18.9] 58 [17.7]
5/16 [7.9] 25 [7.6] 50 [15.2] 37 [11.3] 22 [6.7] 7 [2.1] N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 63 [19.2] 58 [17.7] 53 [16.2]
5/16 [7.9] 25 [7.6] 23 [7.0] 4 [1.2] N/A N/A N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 43 [13.1] 36 [10.9] 30 [9.144] 24 [7.3]
3/8* [9.5] 25 [7.6] 46 [14.0] 38 [11.6] 30 [9.144] 22 [6.7] 15 [4.5]
1/2 [12.7] 25 [7.6] 50 [15.2] 56 [17.1] 55 [16.8] 53 [16.2] 52 [15.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 56 [17.1] 44 [13.4] 32 [9.8] 20 [6.1]
1/2 [12.7] 25 [7.6] 50 [15.2] 75 [22.9] 81 [24.7] 79 [24.1] 76 [23.2]
NOTES:
*Standard line size
N/A - Application not recommended.
14
8.0 DEMAND DEFROST CONTROL AND
8.0
HIGH/LOW PRESSURE CONTROLS
The demand defrost control is a printed circuit board assembly consisting of solid state control devices with electro-mechanical outputs. The demand defrost control monitors the outdoor ambient temperature, outdoor coil temperature, and the compressor run-time to determine when a defrost cycle is required.
Enhanced Feature Demand Defrost Control: Has high and low pressure control inputs with unique pressure switch logic built into the microprocessor to provide compressor and system protection without nuisance lock-outs. Cycles the compressor off for 5 seconds at the beginning and end of the defrost cycle to eliminate the increased compressor noise caused by rapidly changiing system pressures when the reversing valve switches. See section 8.7 for diagnostic flash codes for the two diagnostic LED’s provided on the control.
8.1 DEFROST INITIATION
A defrost will be initiated when the three conditions below are satisfied:
1) The outdoor coil temperature is below 35°F.
2) The compressor has operated for at least 34 minutes with the outdoor coil temperature below 35°F.
3) The measured difference between the ambient temperature and the outdoor coil temperature exceeds a certain threshold.
Additionally, a defrost will be initiated if six hours of accumulated compressor run-time has elapsed without a defrost with the outdoor coil temperature below 35°F.
8.2 DEFROST TERMINATION
Once a defrost is initiated, the defrost will continue until fourteen minutes has elapsed or the coil temperature has reached the terminate temperature. The terminate temperature is factory set at 70°F, although the temperature can be changed to 50°F, 60°F, 70°F or 80°F by relocating a jumper on the board.
8.3 TEMPERATURE SENSORS
The coil sensor is clipped to the top tube on the outdoor coil at the point feed by the distribution tubes from the expansion device (short 3/8” dia. tube). The air sensor is located on the defrost control board.
If the ambient sensor fails the defrost control will initiate a defrost every 34 minutes with the coil temperature below 35°F.
If the coil sensor fails the defrost control will not initiate a defrost.
8.4 TEST MODE
The test mode is initiated by shorting the TEST pins. In this mode of operation, the enable temperature is ignored and all timers are sped up by a factor of 240. To initiate a manual defrost, short the TEST pins. Remove the short when the system switches to defrost mode. The defrost will terminate on time (14 minutes) or when the termination temperature has been achieved. Short TEST pins again to terminate the defrost immediately.
8.5 TROUBLE SHOOTING DEMAND DEFROST OPERATION
Set the indoor thermostat select switch to heat and thermostat lever to a call for heat.
Jumper the “test pins” to put the unit into defrost. If the unit goes into defrost and comes back out of defrost, the indication is that the control is working properly.
If the unit did not go into defrost using the test pins, check to ensure that 24V is being supplied to the control board. If 24V is present then replace the control.
15
16
8.6 HIGH/LOW PRESSURE CONTROL MONITORING
Status of high and low pressure controls is monitored by the enhanced feature demand defrost control and the following actions are taken.
High Pressure Control (optional) – Provides active protection in both cooling and heating modes at all outdoor ambient temperatures. The high pressure control is an automatic reset type and opens at approximately 610 psig and closes at approximately 420 psig. The compressor and fan motor will stop when the high pressure control opens and will start again if the high side pressure drops to approximately
420 psig when the automatic reset high pressure control resets. If the high pressure control opens 3 times within a particular call for heating or cooling operation, the defrost control will lock out compressor and outdoor fan operation.
Low Pressure Control (standard) – Provides active protection in both heating and cooling modes at all outdoor ambient temperatures. The low pressure control is an automatic reset type and opens at approximately 15 psig and closes at approximately 40 psig. Operation is slightly different between cooling and heating modes.
Cooling Mode: The compressor and fan motor will stop when the low pressure control opens and will start again when the low side pressure rises to approximately 40 psig when the low pressure control automatically resets. If the low pressure switch opens 3 times within a particular call for cooling operation, the defrost control will lock out compressor and outdoor fan operation.
Heating Mode: The compressor and fan motor will stop when the low pressure control opens and will start again when the low side pressure rises to approximately 40 psig when the low pressure control automatically resets. If the low pressure switch trips 3 times within 120 minutes of operation during a particular call for heating operation, the defrost control will lock out compressor and outdoor fan operation. If the lock-out due to low pressure occurs at an outdoor ambient temperature below 5°F, the defrost control will automatically exit the lock-out mode when the outdoor ambient temperature rises to 5°F. This feature is necessary since the low pressure control could possibly heave opened due to the outdoor ambient being very low rather than an actual system fault.
Exiting Lock-Out Mode: To exit the lock-out mode, remove 24 volts to the defrost control by removing power to indoor air-handler/furnace or by shorting the two defrost control test pins together.
8.7 ENHANCED FEATURE DEFROST CONTROL DIAGNOSTIC CODES
LED 1
OFF
ON
OFF
FLASH
OFF
FLASH
ON
FLASH
LED 2
OFF
ON
ON
FLASH
FLASH
OFF
FLASH
ON
Alternate Flashing
Control Board Status
No Power
Coil Sensor Failure
Ambient Sensor Failure
Normal
Low Pressure Lockout (short test pins to reset)
High Pressure Lockout (short test pins to reset)
Low Pressure Control Open
High Pressure Control Open
5 Minute Time Delay
9.0 EVACUATION PROCEDURE
The life and efficiency of the equipment is dependent upon the thoroughness exercised by the technician when evacuating air and moisture from the system.
Air in the system causes high condensing temperatures and pressure, resulting in increased power input and non-verifiable performance.
Moisture chemically reacts with the refrigerant and oil to form corrosive hydrofluoric and hydrochloric acids. These attack motor windings and parts, causing breakdown.
After the system has been leak checked and proven sealed, connect the vacuum pump and evacuate system to 500 microns. The vacuum pump must be connected to both the high and low sides of the system through adequate connections. Use the largest size connections available since restrictive service connections may lead to false readings because of pressure drop through the fittings.
IMPORTANT: Compressors (especially scroll type) should never be used to evacuate the heat pump system because internal electrical arcing may result in a damaged or failed compressor.
10.0 START UP AND PERFORMANCE
Even though the unit is factory charged with Refrigerant-410A, the charge must be checked to the charge table attached to the service panel and adjusted, if required.
(See Table 1). Allow a minimum of 5 minutes running. Before analyzing charge, see the instructions on the unit service panel rating plate for marking the total charge.
11.0 CHECKING AIRFLOW
The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this reason, the contractor should use only industry-recognized procedures.
Heat pump systems require a specified airflow. Each ton of cooling requires between 350 and 450 cubic feet [165.2 and 212.4 L/s] of air per minute (CFM) [L/s], or 400 CFM [188.8 L/s] nominally.
Duct design and construction should be carefully done. System performance can be lowered dramatically through bad planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver treated air along the perimeter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they cause drafts. Return air grilles must be properly sized to carry air back to the blower. If they are too small, they also cause noise.
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a comfortable living space.
An air velocity meter or airflow hood can give a reading of the system CFM [L/s].
12.0 CHECKING REFRIGERANT CHARGE
Charge for all systems should be checked against the Charging Chart inside the access panel cover.
IMPORTANT: Do not operate the compressor without charge in system.
Addition of R-410A will raise pressures (vapor, liquid and discharge).
If adding R-410A raises both vapor pressure and temperature, the unit is overcharged.
IMPORTANT: Use industry-approved charging methods to ensure proper system charge.
12.1 CHARGING BY LIQUID PRESSURE
The liquid pressure method is used for charging systems in the cooling and heating mode. The service port on the liquid (small valve) and suction (large valve) is used for this purpose.
Verify that the outdoor unit is running and the indoor air mover is delivering the maximum airflow for this system size. Read and record the outdoor ambient temperature. Read and record the liquid and suction pressures at the ports on the liquid and suction valves.
If refrigerant lines are sized using the nameplate charge, the correct liquid pressure is found at the intersection of the suction pressure and the outdoor ambient.
1. Remove refrigerant charge if the liquid pressure is above the chart value.
2. Add refrigerant charge if the liquid pressure is below the chart value.
17
18
12.2 CHARGING BY WEIGHT
For a new installation, evacuation of interconnecting tubing and indoor coil is adequate; otherwise, evacuate the entire system. Use the factory charge shown in
Table 1 of these instructions or unit data plate. Note that charge value includes charge required for 15 ft. [4.6 m] of standard size interconnecting liquid line.
Calculate actual charge required with installed liquid line size and length using:
1/4” [6.35 mm] O.D. = .3 oz./ft. [8.5 g/m]
5/16” [7.9 mm] O.D. = .4 oz./ft. [11.3 g/m]
3/8” [9.5 mm] O.D. = .6 oz./ft. [17 g/m]
1/2” [12.7 mm] O.D. = 1.2 oz./ft. [34 g/m]
With an accurate scale (+/– 1 oz.) or volumetric charging device, adjust charge difference between that shown on the unit data plate and that calculated for the new system installation. If the entire system has been evacuated, add the total calculated charge.
12.3 FINAL LEAK TESTING
After the unit has been properly evacuated and charged, a halogen leak detector should be used to detect leaks in the system. All piping within the condensing unit, evaporator, and interconnecting tubing should be checked for leaks. If a leak is detected, the refrigerant should be recovered before repairing the leak. The Clean
Air Act prohibits releasing refrigerant into the atmosphere.
13.0 ELECTRICAL WIRING
NOTE: Check all wiring to be sure connections are securely fastened, electrically isolated from each other and that the unit is properly grounded.
!
WARNING
Turn off electric power at the fuse box or service panel before making any electrical connections.
Also, the ground connection must be completed before making line voltage connections. Failure to do so can result in electrical shock, severe personal injury or death.
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any applicable local code.
13.1 POWER WIRING
It is important that proper electrical power from a commercial utility is available at the heat pump contactor. Voltage ranges for operation are shown in Table 4.
Install a branch circuit disconnect within sight of the unit and of adequate size to handle the starting current (see Table 1).
Power wiring must be run in a rain-tight conduit. Conduit must be run through the connector panel below the access cover (see Figure 1) and attached to the bottom of the control box.
Connect power wiring to contactor located in outdoor heat pump electrical box. (See wiring diagram attached to unit access panel.)
Check all electrical connections, including factory wiring within the unit and make sure all connections are tight.
DO NOT connect aluminum field wire to the contactor terminals.
13.2 GROUNDING
A grounding lug is provided near the contactor for a ground wire.
!
WARNING
The unit must be permanently grounded. Failure to do so can cause electrical shock resulting in severe personal injury or death.
TABLE 4
VOLTAGE RANGES (60 HZ)
Nameplate Voltage
208/230 (1 Phase)
Operating Voltage Range at Copeland
Maximum Load Design Conditions for
Compressors
187 - 253
13.3 CONTROL WIRING
(See Figure 5)
If the low voltage control wiring is run in conduit with the power supply, Class I insulation is required. Class II insulation is required if run separate. Low voltage wiring may be run through the insulated bushing provided in the 7/8” [22.2 mm] hole in the base panel, up to and attached to the pigtails from the bottom of the control box.
Conduit can be run to the base panel if desired by removing the insulated bushing.
A thermostat and a 24 volt, 40 VA minimum transformer are required for the control circuit of the condensing unit. The furnace or the air handler transformer may be used if sufficient. See the wiring diagram for reference.
FIGURE 5
CONTROL WIRING FOR AIR HANDLER
Air Handler
W2
W/BL
G
G/BK
Y
Y
W1
W/BK
B BL
ODD
G/Y
BR
C
R
R
Y
WIRING INFORMATION
Line Voltage
-
Field Installed
-
Factory Standard
B
Heat Pump Thermostat
Y
G
W2
E C R
TYPICAL THERMOSTAT:
HEAT PUMP WITH
ELECTRIC HEAT
Heat Pump
Outdoor Unit
Y
B
C
R
D
NOTES:
1. Jumper “E” to “W2” to transfer control of supplemental heat to
1st stage when the emergency heat switch is on.
2. This wire turns on heat for defrost, omit for most economical operation.
3. Wire with colored tracing stripe.
NOTE: RED WIRE REQUIRED WITH RANCO DDL DEMAND DEFROST CONTROL.
14.0 FIELD INSTALLED ACCESSORIES
14.1 COMPRESSOR CRANKCASE HEATER (CCH)
While scroll compressors usually do not require crankcase heaters, there are instances when a heater should be added. Refrigerant migration during the off cycle can result in a noisy start up. Add a crankcase heater to minimize refrigeration migration, and to help eliminate any start up noise or bearing “wash out.”
19
20
TABLE 5
MAXIMUM SYSTEM CHARGE VALUES 13 & 14.5 SEER
Model
Size
30
36
36
42
18
18
24
30
42
48
60
13 SEER Maximum Charge Values
Compressor
Model Number
ZP16K5E-PFV
H82J13BABCA
ZP21K5E-PFV
ZP25K5E-PFV
H81J22BABCA
ZP31K5E-PFV
HRH031U1LP6
ZP36K5E-PFV
HRH036U1LP6
ZP42K5E-PFV
ZP54K5E-PFV
*These compressors come with factory installed crankcase heaters.
Charge Limit Without
Crankcase Heater
9.6 lbs. [66.1 kPa]
*
9.6 lbs. [66.1 kPa]
9.6 lbs. [66.1 kPa]
*
9.6 lbs. [66.1 kPa]
9.6 lbs. [66.1 kPa]
12 lbs. [82.65 kPa]
9.6 lbs. [66.1 kPa]
12 lbs. [82.65 kPa]
*
Model
Size
18
24
30
36
42
14.5 SEER Maximum Charge Values
Compressor
Model Number
ZP16K5E
ZP21K5E
ZP25K5E
ZP31K5E
ZP34K5E
NOTE: Model sizes 48 and 60 have a factory installed crankcase heater.
Charge Limit Without
Crankcase Heater
9.6 lbs. [66.2 kPa]
9.6 lbs. [66.2 kPa]
9.6 lbs. [66.2 kPa]
9.6 lbs. [66.2 kPa]
12 lbs. [82.7 kPa]
NOTE: The installation of a crankcase heater is recommended if the system charge exceeds the values in Table 5.
All heaters are located on the lower half of the compressor shell. Its purpose is to drive refrigerant from the compressor shell during long off cycles, thus preventing damage to the compressor during start-up.
At initial start-up or after extended shutdown periods, make sure the heater is energized for at least 12 hours before the compressor is started. (Disconnect switch on and wall thermostat off.)
14.2 LOW AMBIENT CONTROL (LAC) – COOLING MODE ONLY - RXAD-A08
This component senses compressor head pressure and shuts the heat pump fan off when the head pressure drops to approximately 220 PSIG [1516.8 kPa]. This allows the unit to build a sufficient head pressure at lower ambient in order to maintain system balance and obtain improved capacity. Low ambient control should be used on all equipment operated below 70°F [21.1°C] ambient.
14.3 HIGH PRESSURE CONTROL (HPC)
This control keeps the compressor from operating in pressure ranges which can cause damage to the compressor. This control is in the low voltage control circuit.
High pressure control (HPC) is a manual reset which opens near 610 PSIG [4205.8
kPa]. Do not reset arbitrarily without first determining what caused it to trip.
14.4 HEAT PUMP THERMOSTAT WARNING LIGHT KIT RXPX-D01
This component senses a compressor lock out and tells the thermostat service light to come on. This will let the homeowner know that service is needed on the system.
NOTE: Warning light on thermostat will come on during a 5 minute compressor time delay and for 5 seconds during defrost while the compressor is off. Homeowner should only be concerned if light stays on for more than 5 minutes.
15.0 SERVICE
15.1 SINGLE-POLE COMPRESSOR CONTACTOR (CC)
CAUTION
Single-pole contactors are used on all standard single-phase units up through 5 tons. Caution must be exercised when servicing as only one leg of the power supply is broken with the contactor.
16.0 TROUBLE SHOOTING
In diagnosing common faults in the heat pump system, develop a logical thought pattern as used by experienced technicians. The charts which follow are not intended to be an answer to all problems but only to guide the technician’s thinking.
Through a series of yes and no answers, follow the logical path to a likely conclusion.
A novice technician should use these charts like a road map. Remember that the chart should clarify a logical path to the problem’s solution.
16.1 ELECTRICAL CHECKS FLOW CHART
YES
Repair and Recheck
Unit Running?
NO
Thermostat Problem?
NO
YES
Repair and Recheck
Transformer Problem?
NO
Voltage on Compressor
Side of Contactor?
YES
Run Capacitor
Start Capacitor
Potential Relay
Compressor Internal
Overload Open
NO
Circuit Breakers or Fuses Open
YES
Compressor Winding Open
Unit Wiring and
Connections
Compressor Winding
Grounded
Outdoor Fan Motor
Grounded
Grounded Capacitor
Replace Fuses or Reset Breakers and Recheck System
YES
Go to
Mechanical Checks for Cooling or Heating
NO
Voltage on Line
Side of Contactor?
YES
Compressor Contactor
Hi Pressure Cut-Out
Hot Gas Sensor
Compressor Time-Delay
Unit Wiring and
Connections
21
22
16.2 COOLING MECHANICAL CHECKS FLOW CHART
Unit Running?
YES
Pressure problems?
NO
Go to Electrical
Checks Flow Chart
High Head Pressure
Dirty Outdoor Coil
Low Head Pressure
Low on Charge
Low Suction Pressure
Dirty Filters
Inoperative Outdoor Fan
Overcharge
Recirculation of
Outdoor Air
Non-condensibles
Higher than Ambient
Air Entering Outdoor Coil
Wrong Outdoor Fan Rotation
Open IPR Valve
Low Ambient Temperature Inadequate Indoor Air Flow
Inoperative Compressor
Valves
Outdoor Check Valve
Closed
Dirty Indoor Coil
Broken Indoor
Blower Belt
Inoperative Indoor Blower
Low on Charge
Restricted Indoor
Metering Device
Restricted
Filter Drier
Restricted Indoor
Metering Device
Restriction in System
Reversing Valve
Failure
Recirculation of
Indoor Air
Wrong Indoor
Blower Rotation
Inadequate Ducts
Outdoor Check Valve Closed
Restricted Filter Drier
16.3 HEATING MECHANICAL CHECKS FLOW CHART
Unit Running?
YES
High Head Pressure
Dirty Filters
Dirty Indoor Coil
Inoperative Indoor Blower
Pressure problems?
Low Head Pressure
Low on Charge
Low Indoor Temperature
Open IPR Valve
Closed Indoor
Check Valve Overcharge
Inadequate Indoor
Air Flow
Non-condensibles
Broken Indoor
Blower Belt
Wrong Indoor Blower Rotation
Inadequate Ducts
Inoperative Compressor
Valves
Restricted Outdoor
Metering Device
Restricted
Filter Drier
Reversing Valve
Failure
NO
Go to Electrical
Checks Flow Chart
Low Suction Pressure
Dirty Outdoor Coil
Inadequate Air Flow
Over Outdoor Coil
Inoperative OD Fan
(Check Defrost Control)
Low On Charge
Restricted Outdoor
Metering Device
Restriction in System
Closed Indoor Check Valve
Recirculation of Outdoor Air
Restricted
Filter Drier
23
24
16.4 DEFROST MECHANICAL CHECKS FLOW CHART
No Defrost
Reversing Valve Stuck
No Defrost Timer
Control Power
Failed Defrost Control
Failed Defrost Relay
DEFROST SYSTEM
Incomplete Defrost
Poor Sensor Location
Wrong Defrost Control
Timer Setting
Failed Defrost Relay
(doesn’t stop O.D. Fan)
Thermostat Satisfies
During Defrost
Excessive Defrost
Wrong Defrost Control
Timer Setting
Poor Sensor Location
Low System Charge
Wind Affecting in Defrost
Loose Defrost
Sensor
TABLE 6
TEMPERATURE PRESSURE CHART
-25 [-31.6]
-20 [-28.8]
-15 [-26.1]
-10 [-23.3]
-5 [-20.5]
0 [-17.7]
5 [-15]
10 [-12.2]
15 [-9.4]
20 [-6.6]
25 [-3.8]
30 [-1.1]
35 [1.6]
40 [4.4]
45 [7.2]
50 [10]
TEMP
(Deg. F) [°C]
-150 [-101.1]
-140 [-95.5]
-130 [-90]
-120 [-84.4]
-110 [-78.8]
-100 [-73.3]
-90 [-67.7]
-80 [-62.2]
-70 [-56.6]
-60 [-51.1]
-50 [-45.5]
-40 [-40]
-35 [-37.2]
-30 [-34.4]
55 [12.7]
60 [15.5]
65 [18.3]
70 [21.1]
75 [23.3]
80 [26.6]
85 [29.4]
90 [32.2]
95 [35]
100 [37.7]
105 [40.5]
110 [43.3]
115 [46.1]
120 [48.8]
125 [51.6]
130 [54.4]
135 [57.2]
140 [60]
145 [62.7]
150 [65.5]
22.0 [151.7]
26.4 [182.0]
31.3 [215.8]
36.5 [251.6]
42.2 [290.9]
48.4 [333.7]
55.1 [379.9]
62.4 [430.2]
70.2 [484.0]
78.5 [541.2]
87.5 [603.3]
97.2 [670.2]
107.5 741.2]
118.5 [817.0]
130.2 [897.7]
142.7 [983.9]
R-410A
PSIG [kPa]
—
—
—
—
—
—
—
—
—
0.4 [2.7]
5.1 [35.1]
10.9 [75.1]
14.2 [97.9]
17.9 [123.4]
156.0 [107.6]
170.1 [1172.8]
185.1 [1276.2]
201.0 [1385.8]
217.8 [1501.7]
235.6 [1624.4]
254.5 [1754.7]
274.3 [1891.2]
295.3 [2036.0]
317.4 [2188.4]
340.6 [2348.3]
365.1 [2517.3]
390.9 [2695.2]
418.0 [2882.0]
446.5 [3078.5]
476.5 [3285.3]
508.0 [3502.5]
541.2 [3731.4]
576.0 [3971.4]
612.8 [4225.1]
16.5 SUBCOOLING CALCULATION
1. Measure the liquid pressure at the liquid line service valve.
2. Convert the liquid line pressure to saturated temperature. See Table 6.
3. Measure the liquid line temperature at the liquid line service valve.
4. Compare the liquid line temperature to the saturated temperature.
5. The difference between saturated temperature and liquid line temperature is the subcooling. Subcooling normal range 9° to 12° in the cooling mode. Subcooling in the heating mode can vary widely from model to model and should never be used to determine the correct charge in the field.
TABLE 7
HEAT PUMP SYSTEM TROUBLESHOOTING TIPS
SYSTEM PROBLEM
Overcharge
Undercharge
Liquid Restriction (Drier)
Low Evaporator Airflow
Dirty Heat Pump
Low Outside Ambient Temperature
Inefficient Compressor
TEV Feeler Bulb Charge Lost
Poorly Insulated Sensing Bulb
HEAT PUMP SYSTEM
TROUBLESHOOTING TIPS
INDICATORS
DISCHARGE SUCTION
PRESSURE PRESSURE
High High
Low
Low
Low
High
Low
Low
Low
High
Low
Low
Low
High
Low
High
Low
High
SUPERHEAT SUBCOOLING
Low
High
High
Low
Low
High
High
High
Low
High
Low
High
Low
Low
High
High
High
Low
COMPRESSOR
AMPS
High
Low
Low
Low
High
Low
Low
Low
High
25
16.6 GENERAL TROUBLE SHOOTING CHART
!
WARNING
Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death.
SYMPTOM
Unit will not run
POSSIBLE CAUSE
• Power off or loose electrical connection
• Thermostat out of calibration-set too high
• Defective contactor
• Blown fuses / tripped breaker
• Transformer defective
• High pressure control open (if provided)
Outdoor fan runs, compressor • Run or start capacitor defective doesn’t • Start relay defective
• Loose connection
Insufficient cooling
Compressor short cycles
Registers sweat
• Compressor stuck, grounded or open motor winding, open internal overload.
• Low voltage condition
• Improperly sized unit
• Improper indoor airflow
• Incorrect refrigerant charge
• Air, non-condensibles or moisture in system
• Incorrect voltage
• Defective overload protector
• Refrigerant undercharge
• Low indoor airflow
High head-low vapor pressures • Restriction in liquid line, expansion device or filter drier
• Flowcheck piston size too small
• Incorrect capillary tubes
High head-high or normal vapor • Dirty outdoor coil pressure - Cooling mode • Refrigerant overcharge
• Outdoor fan not running
• Air or non-condensibles in system
Low head-high vapor pressures • Flowcheck piston size too large
• Defective Compressor valves
• Incorrect capillary tubes
Low vapor - cool compressor • Low indoor airflow iced indoor coil
• Operating below 65°F [18.3°C] outdoors
• Moisture in system
High vapor pressure
Fluctuating head & vapor pressures
• Excessive load
• Defective compressor
• TEV hunting
• Air or non-condensibles in system
Gurgle or pulsing noise at expansion device or liquid line
• Air or non-condensibles in system
REMEDY
• Check for correct voltage at contactor in condensing unit
• Reset
• Check for 24 volts at contactor coil - replace if contacts are open
• Replace fuses / reset breaker
• Check wiring-replace transformer
• Reset-also see high head pressure remedy-The high pressure control opens at 450 PSIG [3102 kPa]
• Replace
• Replace
• Check for correct voltage at compressor check & tighten all connections
• Wait at least 2 hours for overload to reset.
If still open, replace the compressor.
• Add start kit components
• Recalculate load
• Check - should be approximately 400 CFM [188.8 L/s] per ton.
• Charge per procedure attached to unit service panel
• Recover refrigerant, evacuate & recharge, add filter drier
• At compressor terminals, voltage must be ± 10% of nameplate marking when unit is operating.
• Replace - check for correct voltage
• Add refrigerant
• Increase speed of blower or reduce restriction - replace air filter
• Remove or replace defective component
• Change to correct size piston
• Change coil assembly
• Clean coil
• Correct system charge
• Repair or replace
• Recover refrigerant, evacuate & recharge
• Change to correct size piston
• Replace compressor
• Replace coil assembly
• Increase speed of blower or reduce restriction - replace air filter
• Add Low Ambient Kit
• Recover refrigerant - evacuate & recharge - add filter drier
• Recheck load calculation
• Replace
• Check TEV bulb clamp - check air distribution on coil - replace
TEV
• Recover refrigerant, evacuate & recharge
• Recover refrigerant, evacuate & recharge
26
16.7 SERVICE ANALYZER CHART
COMPRESSOR OVERHEATING
SYMPTOMS
High superheat
POSSIBLE CAUSE
Low charge
Faulty metering device
Low voltage
High voltage
High head pressure
Short cycling of compressor
High internal load
Restriction in liquid line
Low head pressure
Suction or liquid line subjected to high heat source
Loose wire connections
Dirty or pitted compressor contactor contacts
Power company problem, transformer
Undersized wire feeding unit
Power company problem
Overcharge
Dirty heat pump coil
Faulty or wrong size heat pump fan motor
Faulty fan blade or wrong rotation
Recirculation of air
Additional Heat Source
Non-condensibles
Equipment not matched
Faulty pressure control
Loose wiring
Thermostat
TEV
Capillary tube
CHECK/REMEDIES
Check system charge
Restricted cap tube, TEV (TXV)
Power element superheat adjustment
Foreign matter stopping flow
Hot air (attic) entering return
Heat source on; mis-wired or faulty control
Drier plugged
Line kinked
Low charge
Operating in low ambient temperatures
Hot attic
Hot water line
Check wiring
Replace contactor
Have problem corrected before diagnosis continues
Correct and complete diagnosis
Have problem corrected
Check system charge
Clean coil
Replace fan motor
Replace fan blade
Replace with correct rotation motor
Correct installation
Check for dryer vent near unit
Check for recirculation from other equipment
Recover refrigerant, Evacuate and recharge system
Correct mis-match
Replace pressure control
Check unit wiring
Located in supply air stream
Differential setting too close
Customer misuse
Internal foreign matter
Power element failure
Valve too small
Distributor tube/tubes restricted
Restricted with foreign matter
Kinked
I.D. reduced from previous compressor failure
27
28
SYMPTOMS
Short cycling of compressor (cont.)
POSSIBLE CAUSE
Low charge
Low evaporator air flow
Faulty Compressor Valves
ELECTRICAL
SYMPTOMS
Voltage present on load side of compressor contactor and compressor won’t run
Voltage present on line side of pressor contactor only
No voltage on line side of compressor contactor
Improper voltage
Faulty run capacitor
Faulty internal overload
Fast equalization/
Low pressure difference
CHECK OR REMEDIES
Check system charge
Dirty coil
Dirty filter
Duct too small or restricted
Replace
Replace compressor
Replace compressor and examine system to locate reason
POSSIBLE CAUSE
Compressor start components
Run capacitor
Internal overload
Compressor windings
Thermostat
Compressor control circuit
Blown fuses or tripped circuit breaker
Improper wiring
High voltage
Low voltage
CHECK OR REMEDIES
Check start capacitor
Check potential relay
Check with ohmmeter
Allow time to reset
Check for correct ohms
Check for control voltage to comcontactor coil
High pressure switch
Low pressure switch
Ambient thermostat
Solid state protection control or internal thermal sensors
Compressor timed off/on control or interlock
Check for short in wiring or unit
Re-check wiring diagram
Wrong unit
Power supply problem
Wrong unit
Power supply problem
Wiring undersized
Loose connections
Check incoming power and fusing Single Phasing (3 phase)
CONTAMINATION
SYMPTOMS
Moisture
High head pressure
Unusual head and suction readings
Foreign Mattercopper filings
Copper oxide
Welding scale
Soldering flux
Excess soft solder
POSSIBLE CAUSE
Poor evacuation on installation or during service
Non-condensibles air
Wrong refrigerant
Copper tubing cuttings
Dirty copper piping
Nitrogen not used
Adding flux before seating copper part way
Wrong solder material
CHECK OR REMEDIES
In each case, the cure is the same.
Recover refrigerant. Add filter drier, evacuate and re-charge
LOSS OF LUBRICATION
SYMPTOMS
Compressor failures
Low suction pressure
Cold, Noisy compressor - Slugging
Noisy compressor
Cold, sweating compressor
Low Load
Short cycling of compressor
FLOODED STARTS
SYMPTOMS
Liquid in the compressor shell
Too much liquid in system
SLUGGING
SYMPTOMS
On start up
TEV hunting when running
FLOODING
SYMPTOMS
Poor system control using a TEV
Poor system control using capillary tubes
POSSIBLE CAUSE
Line tubing too long
Line tubing too large
Low charge
Refrigerant leaks
Dilution of Oil with Refrigerant
Migration
Flooding
Reduced air flow
Thermostat setting
Faulty pressure control
Loose wiring
Thermostat
POSSIBLE CAUSES
Faulty or missing crankcase heater
Incorrect piping
Overcharge
POSSIBLE CAUSES
Incorrect piping
Oversized TEV
POSSIBLE CAUSES
Loose sensing bulb
Bulb in wrong location
Wrong size TEV
Improper superheat setting
Overcharge
High head pressures
Evaporator air flow too low
CHECK OR REMEDIES
Add oil to the recommended level
Reduce pipe size to improve oil return
Check system charge
Repair and recharge
Observe piping guidelines
Check crankcase heater
Check system charge
Dirty filter
Dirty coil
Wrong duct size
Restricted duct
Advise customer
Replace control
Check all control wires
In supply air stream, out of calibration,
Customer misuse
CHECK OR REMEDIES
Replace crankcase heater
Check Piping guidelines
Check and adjust charge
CHECK OR REMEDIES
Review pipe size guidelines
Check TEV application
CHECK OR REMEDIES
Secure the bulb and insulate
Relocate bulb
Use correct replacement
Adjust, if possible;
Replace, if not
Check system charge
Dirty heat pump
Restricted air flow
Recirculation of air
Adjust air flow to 400 CFM
[188.8 L/s] /Ton
29
30
THERMOSTATIC EXPANSION VALVES
SYMPTOMS POSSIBLE CAUSE
High Superheat, Low Suction Pressure Moisture freezing and blocking valve
Valve feeds too much refrigerant, with low superheat and higher than mal suction pressure
Compressor flood back upon start up
Dirt or foreign material blocking valve
Low refrigerant charge
Vapor bubbles in liquid line
Misapplication of internally equalized valve
Plugged external equalizer line
Undersized TEV
Loss of charge from power head sensing bulb
Charge migration from sensing bulb to power head (Warm power head with warm, wet cloth. Does valve operate correctly now?)
Improper superheat adjustment
(Only applicable to TEV with adjustable superheat settings)
Moisture causing valve to stick open.
Dirt or foreign material causing valve to stick open
TEV seat leak (A gurgling or hissing sound is heard AT THE TEV during the off cycle, if this is the cause.)
NOT APPLICABLE TO BLEED
PORT VALVES.
Oversized TEV
Incorrect sensing bulb location
Low superheat adjustment
(only applicable to TEV with adjustable superheat setting)
Incorrectly installed, or restricted external equalizer line
Refrigerant drainage from flooded evaporator
Compressor in cold location
Any of the causes listed under
Symptoms of Problem #2
CHECK OR REMEDIES
Recover charge, install filter-drier, evacuate system, recharge
Recover charge, install filter-drier, evacuate system, recharge
Correct the charge
Remove restriction in liquid line
Correct the refrigerant charge
Remove non-condensible gases
Size liquid line correctly
Use correct TEV
Remove external equalizer line restriction
Replace with correct valve
Replace power head or complete
TEV
Ensure TEV is warmer than sensing bulb
Adjust superheat setting counterclockwise
Recover refrigerant, replace filterdrier, evacuate system and then norrecharge
Recover refrigerant, replace filterdrier, evacuate system and recharge
Replace the TEV
Install correct TEV
Install bulb with two mounting straps, in 2:00 or 4:00 position on suction line, with insulation
Turn superheat adjustment clockwise
Remove restriction, or relocate external equalizer
Install trap riser to the top of the evaporator coil
Install crankcase heater on compressor
Any of the solutions listed under
Solutions of Problem #2
THERMOSTATIC EXPANSION VALVES
SYMPTOMS
Superheat is low to normal with low suction pressure
Superheat and suction pressure fluctuate (valve is hunting)
Valve does not regulate at all
POSSIBLE CAUSE
Unequal evaporator circuit loading
Low load or airflow entering evaporator coil
Expansion valve is oversized
Sensing bulb is affected by liquid refrigerant or refrigerant oil flowing through suction line
Unequal refrigerant flow through evaporator circuits
Improper superheat adjustment
(only possible with TEV having superheat adjustment)
Moisture freezing and partially blocking TEV
External equalizer line not connected or line plugged
Sensing bulb lost its operating charge
Valve body damaged during soldering or by improper installation
CHECK OR REMEDIES
Ensure air flow is equally distributed through evaporator
Ensure proper piston is inserted into
RCBA or RCHA evaporator coil distributor
Check for blocked distributor tubes
Ensure blower is moving proper air
CFM [L/s]
Remove/Correct any air flow restriction
Install correct TEV
Relocate sensing bulb in another position around the circumference of the suction line
Ensure proper distributor piston is inserted in RCBA or RCHA coil
Ensure sensing bulb is located properly
Check for blocked distributor tubes
Replace TEV or adjust superheat
Recover refrigerant, change filterdrier, evacuate system and recharge
Connect equalizer line in proper location, or remove any blockage
Replace TEV
Replace TEV
31
17.0 WIRING DIAGRAMS
17.1 ENHANCED DEFROST CONTROL - PSC MOTOR
FIGURE 6
32
17.2 ENHANCED DEFROST CONTROL - ECM MOTOR
FIGURE 7
33
34
35
36 CM 0309
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Table of contents
- 3 SAFETY INFORMATION
- 4 GENERAL INFORMATION
- 4 Checking Product Received
- 4 Applications
- 5 Dimensions
- 6 Electrical and Physical Data
- 6 LOCATING UNIT
- 6 Corrosive Environment
- 7 Heat Pump Location
- 7 Operational Issues
- 7 For Units With Space Limitations
- 8 Customer Satisfaction Issues
- 8 Unit Mounting
- 8 Factory-Preferred Tie-Down Method
- 10 REFRIGERANT CONNECTIONS
- 10 REPLACEMENT UNITS
- 10 INDOOR COIL
- 10 Location
- 11 INTERCONNECTING TUBING
- 11 Vapor & Liquid Lines
- 11 Maximum Length of Lines
- 11 Vertical Separation
- 11 Tubing Installation
- 12 Tubing Connections
- 12 Leak Testing
- 15 DEMAND DEFROST CONTROL
- 15 Defrost Initiation
- 15 Defrost Termination
- 15 Temperature Sensors
- 15 Test Mode
- 15 Trouble Shooting Demand Defrost Operation
- 16 High/Low Pressure Control Monitoring
- 16 Enhanced Feature Defrost Control Diagnostic Codes
- 16 EVACUATION PROCEDURE
- 17 10.0 START UP & PERFORMANCE
- 17 11.0 CHECKING AIRFLOW
- 17 12.0 CHECKING REFRIGERANT CHARGE
- 17 12.1 Charging By Liquid Pressure
- 18 12.2 Charging By Weight
- 18 12.3 Final Leak Testing
- 18 13.0 ELECTRICAL WIRING
- 18 13.1 Power Wiring
- 18 13.2 Grounding
- 19 13.3 Control Wiring
- 19 14.0 FIELD INSTALLED ACCESSORIES
- 19 14.1 Compressor Crankcase Heat
- 20 14.2 Low Ambient Control
- 20 14.3 High Pressure Control
- 20 14.4 Heat Pump Thermostat Warning Light Kit RXPX-D
- 20 15.0 SERVICE
- 20 15.1 Single Pole Compressor Contactor
- 21 16.0 TROUBLESHOOTING
- 21 16.1 Electrical Checks Flow Chart
- 22 16.2 Cooling Mechanical Checks Flow Chart
- 23 16.3 Heating Mechanical Checks Flow Chart
- 24 16.4 Defrost Mechanical Checks Flow Chart
- 25 16.5 Subcooling Calculation
- 26 16.6 General Troubleshooting Chart
- 27 16.7 Service Analyzer Chart
- 32 17.0 WIRING DIAGRAMS
- 32 17.1 Enhanced Defrost Control - PSC Motor
- 33 17.2 Enhanced Defrost Control - ECM Motor