MBT 2-5Tons R410a High Efficiency Air Handlers Instruction Manual
- June 15, 2024
- MBT
Table of Contents
MBT 2-5Tons R410a High Efficiency Air Handlers
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION
WARNING
- These instructions are intended as an aid to qualified licensed service personnel for the 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.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. This unit can’t be used outdoor.
- Proposition 65: This appliance contains fiberglass insulation. Respirable particles of fiberglass are known to the state of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.”
Air Handler Features
- Multi-speed blower motor.
- Replace piston to TXV easily.
- Multi-position installation – upflow or horizontal right standard; field convertible to horizontal left or downflow.
- Multiple electrical entry locations.
- Field-installed electric heater kits 5, 7.5, 10, 15, and 20 kW are available as an accessory.
- Dual front panel design for ease of maintenance.
- The blower and coil easily slide out for ease of maintenance.
- Fully insulated cabinet design.
- Horizontal and vertical condensate drain pans are standard.
- Condensate drain pan is a polymer with UVC inhibitor.
- Primary and secondary condensate drain fittings.
- Factory-sealed cabinet certified to achieve 2% or less air leakage rate at 1.0 inch water column.
- Integrated filter rack with tool-less door access.
- AHRI and ETL are listed.
This document is customer property and is to remain with this unit. These instructions do not cover all the different variations systems nor does it provide for every possible contingency to be met in connection with installation. All phases of this installation must comply with national state and local codes. If additional information is required, please contact your local distributor.
SAFETY
- This is a safety alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury.
- This is an attention alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury.
WARNING
- Disconnect all power to the unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
WARNING
- If removal of the blower assembly is required, all disconnect switches supplying power to the equipment must be de-energized and locked (if not in sight of unit ) so the field power wires can be safely removed from the blower assembly. Failure to do so can cause electrical shock resulting in personal injury or death.
WARNING
- Because of possible damage to equipment or personal injury, installation, service, and maintenance should be performed by trained, qualified service personnel. Consumer service is recommended only for filter cleaning/ replacement. Never operate the unit with the access panels removed.
WARNING
- These instructions are intended as an aid to qualified, licensed service personnel for the proper installation, adjustment, and operation of this unit. Read these instructions thoroughly before attempting installation or operation. Failure to
- Following 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 result in electrical shock causing personal injury or death.
WARNING
PROPOSITION 65: This appliance contains fiberglass insulation. Respirable
particles of fiberglass are known to the State of California to cause cancer.
All manufacturer products meet current federal OSHA Guidelines for safety.
California Proposition 65 warnings are required for certain products, which
are not covered by the OSHA standards. California’s Proposition 65 requires
warnings for products sold in California that contain or produce any of over
600 listed chemicals known to the State of California to cause cancer or birth
defects such as fiberglass insulation, lead in brass, and combustion products
from natural vapor.
All “new equipment” shipped for sale in California will have labels stating
that the product contains and/or produces Proposition 65 chemicals. Although
we have not changed our processes, having the same label on all our products
facilitates manufacturing and shipping. We cannot always know “when, or if”
products will be sold in the California market. You may receive inquiries from
customers about chemicals found in, or produced by, some of our heating and
air-conditioning equipment, or found in natural vapor used with some of our
products. Listed below are those chemicals and substances commonly associated
with similar equipment in our industry and other manufacturers.
Glass Wool (Fiberglass) Insulation Carbon Monoxide (CO) Formaldehyde Benzene
More details are available at the websites for OSHA (Occupational Safety and Health Administration), at www.osha.gov and the State of California’s OEHHA (Office of Environmental Health Hazard Assessment), at www.oehha.org. Consumer education is important since the chemicals and substances on the list are found in our daily lives. Most consumers are aware that products present safety and health risks when improperly used, handled, and maintained.
CAUTION
WARNING
The first 6 inches of supply air plenum and ductwork must be constructed of sheet metal as required by NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly under the unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are used, they may be located only in the vertical walls of a rectangular plenum, a minimum of 6 inches from the solid bottom. The metal plenum of the duct may be connected to the combustible floor base, if not, it must be connected to the unit supply duct exposed to the supply air opening from the downflow unit. Exposing combustible (non-metal) material to the supply opening of a downflow unit can cause a fire resulting in property damage, personal injury or death. Exception warning to downflow: Installations on concrete floor slab with supply air plenum and ductwork completely encased must be not less than 2 inches of concrete (See NFPA 90A).
GENERAL
The unit can be positioned for bottom return air in the upflow position, left
and right return in the horizontal position, top return in the downflow
position.
This Air Handler provides the flexibility for installation in any upflow or
downflow horizontal application. The direct drive motors provide a selection
of air volume to match any application. 3-Speed motors provide selections of
airflow to meet desired applications. Top and side power and control wiring,
and accessible screw terminals for control wiring all combine to make the
installation easy and minimize installation cost. See Fig.2-5. Do not install
the unit in an area where flammable materials are present due to the risk of
an explosion resulting in serious injury or death.
WARNING
If the supporting structural members are not strong enough to take the unit’s
weight, the unit could fall out of place and cause serious injury. If a
return-air duct is not installed, carefully select the place and method of
product installation so that airflow into the product will not be blocked. The
unit should be installed in a level position to ensure proper condensation
drainage. Up to an additional ¼” rise over the width or depth of the unit is
allowed to create additional sloping towards the drain. The Unit must be
positioned between level and ¼” rise, sloping toward the drain connections.
Install the indoor and outdoor unit, power supply wiring, and connecting wires
at least 3.5 ft. away from televisions or radios in order to prevent image
interference or noise.
See Fig.2-1 and Fig.2-2.
When the unit is installed in a hot and humid place If the humidity inside the installation space exceeds 86°F and RH 80%, it is recommended to insulate the cabinet exterior. Use glass wool or polyethylene foam as insulation so that the thickness is more than 2 in. and fits inside the installation space opening. Respectively, condensation may form on the surface of the insulation. Be sure to use insulation that is designed for use with HVAC Systems. Condensation may form on the product during cool operation. It is also recommended to use the second drain pan and secure the unit firmly to prevent it from falling. See Fig.2-3 and Fig.2-4. Unit Dimensions
DIMENSIONAL DATA
MODEL SIZE| UNIT HEIGHT “H” IN. [mm]| UNIT WIDTH “W” IN. [mm]| UNIT LENGHT “D” IN. [mm]|
SUPPLY DUCT “A”
| UNIT WEIGHT (LBS.[kg])
---|---|---|---|---|---
24| 41-3/8″[1050]| 18-1/8″[460]| 20-1/2″[520]| 16″[406]| 99/[45]
36| 46-1/2″[1180]| 19-5/8″[500]| 21-5/8″[550]| 18″[456]| 121/[55]
60| 54-1/2″[1385]| 22″[560]| 24″[610]| 19-1/2″[496]| 152/[69]
61| 54-1/2″[1385]| 22″[560]| 24″[610]| 19-1/2″[496]| 159/[72]
APPLICATIONS
Vertical Upflow
Vertical Upflow configuration is the factory set on all models. See Fig.2-5.
If return air is to be ducted, install duct flush with the floor. Use a
fireproof resilient gasket 1/8 to 1/4 in. thick between the ducts, unit, and
floor. Set the unit on the floor over the opening.
IMPORTANT NOTE
Torque applied to drain connections should not exceed 15ft. lbs. See Fig.2-5
& 3-1.
Vertical Downflow
Conversion to Vertical Downflow: A vertical upflow unit may be converted to
vertical downflow. Remove the door and indoor coil and reinstall 180° from the
original position. See Fig.3-2.
IMPORTANT: To comply with certification agencies and the National
Electric Code for downflow application, the circuit breaker(s) on field-
installed electric heater kits must be re-installed per the procedure below so
that the breaker switch “on” position and marking is up and, The “off”
position and marking is down.
-
To rotate breaker(s): Rotate one breaker set (circuit) at a time starting with the one on the right. Loosen both lugs on the load side of the breaker. (Make sure that wires are identified and reinstalled into the proper breaker). Wires are bundled with wire ties, one bundle going to the right lug and one bundle going to the left lug.
-
Using a screwdriver or pencil, lift a white plastic tab with a hole away from the breaker until the breaker releases from the mounting opening.
With the breaker held in hand, rotate the breaker so that the “on” position is up, and the “off” position is down with the unit in the planned vertical mounting position. Insert the right wire bundle into the top right breaker lug, ensuring all strands of all wires are inserted fully into the lug, and no wire insulation is in the lug. -
Tighten lug as tight as possible while holding the circuit breaker. Check wires and make sure each wire is secure and none are loose. Repeat for the left wire bundle in the left top circuit breaker lug.
-
Replace the breaker by inserting the breaker mounting tab opposite the white pull tab in the opening, and hook the mounting tab over the edge of the opening.
With a screwdriver or pencil, pull the blue tab with the hole away from the breaker while setting that side of the breaker into the opening. When a breaker is in place, release the tab, locking the circuit breaker into the location in the opening. -
Repeat the above operation for the remaining breaker(s) (if more than one is provided). Replace single point wiring jumper bar, if it is used, on the line side of the breaker and tighten it securely.
-
Double-check wires and lugs to make sure all are secure and tight. Check to make sure unit wiring to circuit breaker load lugs match that shown on the unit wiring diagram.
CAUTION
When using the unit with an electrical heater, the switch is used only for the electrical heater on the front of the panel.
Horizontal
The horizontal right is the default factory configuration for the units. Horizontal left isn’t the default factory configuration for the units. Conversion to Horizontal Left: A vertical up-flow unit may be converted to horizontal left by removing the indoor coil assembly and reinstalling the coil as shown for the left-hand air supply.
- Rotate the unit into the downflow position, with the coil compartment on top and the blower compartment on bottom. See Fig. 3-2.
- Reinstall the indoor coil 180° from the original position. Ensure the retaining channel is fully engaged with the coil rail. See Fig. 3-2.
- Secondary drain pan kits are recommended when the unit is configured for the horizontal position over a finished ceiling and/or living space.
CAUTION
Horizontal units must be configured for right-hand air supply or left-hand air supply. The horizontal drain pan must be located under the indoor coil. Failure to use the drain pan can result in property damage.
Conversion in Horizontal Direction: A horizontal right-hand supply can be changed to a horizontal left-hand supply by removing the indoor coil and reinstalling 180° from the original.
Installation In An Unconditioned Space
IMPORTANT: There are two pairs of coil rails in the air handler for default and counterflow applications. If the air handler is installed in an unconditioned space, the two unused coil rails should be removed to minimize air handler surface sweating. The coil rails can be easily removed by taking off the 6 mounting screws from both sides of the cabinet.
ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any applicable local ordinance
WARNING.
Disconnect all power to the unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
Power Wiring
It is important that proper electrical power is available for connection to the unit model being installed. See the unit nameplate, wiring diagram, and electrical data in the installation instructions.
- If required, install a branch circuit disconnect of adequate size, located within sight of, and readily accessible to the unit.
- IMPORTANT: After the Electric Heater is installed, units may be equipped with one two or three 30-60 amps. circuit breakers. These breaker(s) protect the internal wiring in the event of a short circuit and serve as a disconnect. Circuit breakers installed within the unit do not provide over-current protection of the supply wiring and therefore may be sized larger than the branch circuit protection.
- Supply circuit power wiring must be 75°C minimum copper conductors only. See Electrical Data in this section for ampacity, wire size, and circuit protector requirements. Supply circuit protective devices may be either fuses or “HACR” type circuit breakers.
- Power wiring may be connected to either the right, left side, or top. Three 7/8″, 1-3/8″, 1-3/4″ dia. concentric knockouts are provided for connection of power wiring to the unit.
- Power wiring is connected to the power terminal block in the unit’s electric cabinet.
Control Wiring
IMPORTANT: Class 2 low voltage control wiring should not be run in
conduit with main power wiring and must be separated from power wiring unless
class 1 wire of proper voltage rating is used.
- Low voltage control wiring should be 18 Awg. color-coded. For lengths longer than 100 ft., 16 Awg. wire should be used.
- Low voltage control connections are made to low voltage pigtails extending from top of the air handler (up-flow position – see Fig 2-2).
- Connections for control wiring are made with wire nuts. Control wiring knockouts (5/8″and 7/8″) are also provided on the right and left side of the unit for side connection.
- See the wiring diagrams attached to the indoor and outdoor sections to be connected.
- Make sure, after installation, separation of control wiring and power wiring has been maintained.
Grounding
WARNING
The unit must be permanently grounded. Failure to do so can result in electrical shock causing personal injury or death.
- Grounding may be accomplished by grounding metal conduit when installed in accordance with electrical codes to the unit cabinet.
- Grounding may also be accomplished by attaching ground wire(s) to the ground lug(s) provided in the unit wiring compartment.
- Ground lug(s) are located close to the wire entrance on the left side of the unit (up-flow). Lug(s) may be moved to marked locations near the wire entrance on the right side of the unit (up-flow). If an alternate location is more convenient.
- The use of multiple supply circuits requires the grounding of each circuit to the lug(s) provided in the unit.
Electrical Data
Electric Kit Mca/Mop Data Heat kit suitable for AHU 4-way position installation. Ampacities for MCA and Fuse/breaker including the blower motor. Heat pump systems require a specified airflow. Each ton of cooling requires between 350 and 450 cubic feet of air per minute (CFM), or 400 CFM nominally
Electric Heater Kits
AIRFLOW PERFORMANCE (AMERISTAR AIR HANDLERS ARE SUITABLE FOR MOBILE HOME APPLICATIONS)
Airflow performance data is based on cooling performance with a coil and no filter in place. Select the performance table for the appropriate unit size. External static applied to unit allows operation within the minimum and maximum limits shown in the table below for both cooling and electric heat operation.
AIRFLOW PERFORMANCE DATA
Air Handler Model| Outdoor Unit Size(Tons)|
Motor Speed
| | CFM Wet Coil without filter and Electric Heat
---|---|---|---|---
External Static Pressure-Inches W.C.[kPa]
0[0]| 0.1[.025]| 0.2[.050]| 0.3[.075]| 0.4[0.100]| 0.5[0.125]| 0.6[0.150]|
0.7[0.175]| 0.8[0.200]
24
|
1.5
|
1
| SCFM| 590| 544| 511| 447| 404| 345| 311| 273| 239
Power/W| 49| 57| 64| 70| 75| 82| 91| 97| 102
Current/A| 0.77| 0.81| 0.84| 0.87| 0.91| 0.94| 0.99| 1.02| 1.11
2
| SCFM| 681| 633| 591| 535| 490| 446| 388| 354| 313
Power/W| 63| 69| 77| 83| 90| 96| 103| 111| 118
Current/A| 0.84| 0.87| 0.93| 0.96| 0.99| 1.03| 1.07| 1.13| 1.16
3
(Recommended)
| SCFM| 788| 736| 687| 648| 597| 558| 511| 473| 429
Power/W| 86| 91| 100| 108| 114| 121| 128| 133| 142
Current/A| 0.95| 0.99| 1.11| 1.14| 1.18| 1.21| 1.26| 1.31| 1.37
4
(Factory Default)
| SCFM| 883| 842| 796| 758| 717| 681| 642| 599| 524
Power/W| 121| 128| 135| 144| 151| 159| 165| 173| 181
Current/A| 1.21| 1.28| 1.32| 1.38| 1.43| 1.47| 1.54| 1.59| 1.64
5
| SCFM| 1103| 1073| 1036| 998| 967| 934| 896| 855| 814
Power/W| 233| 241| 249| 258| 265| 275| 281| 286| 291
Current/A| 1.97| 2.03| 2.09| 2.16| 2.22| 2.29| 2.34| 2.37| 2.41
24
|
2
|
1
| SCFM| 590| 544| 511| 447| 404| 345| 311| 273| 239
Power/W| 49| 57| 64| 70| 75| 82| 91| 97| 102
Current/A| 0.77| 0.81| 0.84| 0.87| 0.91| 0.94| 0.99| 1.02| 1.11
2
| SCFM| 681| 633| 591| 535| 490| 446| 388| 354| 313
Power/W| 63| 69| 77| 83| 90| 96| 103| 111| 118
Current/A| 0.84| 0.87| 0.93| 0.96| 0.99| 1.03| 1.07| 1.13| 1.16
3
| SCFM| 788| 736| 687| 648| 597| 558| 511| 473| 429
Power/W| 86| 91| 100| 108| 114| 121| 128| 133| 142
Current/A| 0.95| 0.99| 1.11| 1.14| 1.18| 1.21| 1.26| 1.31| 1.37
4
(Factory Default)
| SCFM| 883| 842| 796| 758| 717| 681| 642| 599| 524
Power/W| 121| 128| 135| 144| 151| 159| 165| 173| 181
Current/A| 1.21| 1.28| 1.32| 1.38| 1.43| 1.47| 1.54| 1.59| 1.64
5
| SCFM| 1103| 1073| 1036| 998| 967| 934| 896| 855| 814
Power/W| 233| 241| 249| 258| 265| 275| 281| 286| 291
Current/A| 1.97| 2.03| 2.09| 2.16| 2.22| 2.29| 2.34| 2.37| 2.41
36
|
2.5
|
1
| SCFM| 898| 752| 603| 511| 405| 360| 301| 259| 203
Power/W| 78| 72| 65| 60| 54| 48| 41| 38| 36
Current/A| 0.68| 0.64| 0.59| 0.52| 0.46| 0.42| 0.36| 0.29| 0.28
2
| SCFM| 1026| 902| 810| 694| 630| 544| 490| 409| 366
Power/W| 109| 99| 106| 111| 120| 126| 135| 140| 148
Current/A| 0.94| 0.86| 0.91| 0.95| 1.03| 1.07| 1.14| 1.18| 1.24
3
| SCFM| 1161| 1114| 1052| 992| 893| 825| 768| 694| 646
Power/W| 148| 158| 164| 175| 187| 193| 203| 209| 219
Current/A| 1.26| 1.34| 1.39| 1.48| 1.57| 1.61| 1.69| 1.73| 1.81
4
(Recommended)
| SCFM| 1287| 1244| 1186| 1142| 1078| 969| 914| 892| 893
Power/W| 194| 205| 211| 221| 233| 241| 252| 253| 253
Current/A| 1.62| 1.69| 1.75| 1.83| 1.93| 1.98| 2.07| 2.08| 2.11
5
(Factory Default)
| SCFM| 1491| 1442| 1396| 1348| 1302| 1243| 1150| 1088| 1029
Power/W| 290| 298| 307| 318| 325| 337| 351| 362| 367
Current/A| 2.35| 2.42| 2.49| 2.58| 2.64| 2.73| 2.83| 2.92| 2.96
36
|
3
|
1
| SCFM| 898| 752| 603| 511| 405| 360| 301| 259| 203
Power/W| 78| 72| 65| 60| 54| 48| 41| 38| 36
Current/A| 0.68| 0.64| 0.59| 0.52| 0.46| 0.42| 0.36| 0.29| 0.28
2
| SCFM| 1026| 902| 810| 694| 630| 544| 490| 409| 366
Power/W| 109| 99| 106| 111| 120| 126| 135| 140| 148
Current/A| 0.94| 0.86| 0.91| 0.95| 1.03| 1.07| 1.14| 1.18| 1.24
3
| SCFM| 1161| 1114| 1052| 992| 893| 825| 768| 694| 646
Power/W| 148| 158| 164| 175| 187| 193| 203| 209| 219
Current/A| 1.26| 1.34| 1.39| 1.48| 1.57| 1.61| 1.69| 1.73| 1.81
4| SCFM| 1287| 1244| 1186| 1142| 1078| 969| 914| 892| 893
Power/W| 194| 205| 211| 221| 233| 241| 252| 253| 253
Current/A| 1.62| 1.69| 1.75| 1.83| 1.93| 1.98| 2.07| 2.08| 2.11
5
(Factory Default)
| SCFM| 1491| 1442| 1396| 1348| 1302| 1243| 1150| 1088| 1029
Power/W| 290| 298| 307| 318| 325| 337| 351| 362| 367
Current/A| 2.35| 2.42| 2.49| 2.58| 2.64| 2.73| 2.83| 2.92| 2.96
Air Handler Model| Outdoor Unit Size(Tons)|
Motor Speed
| | CFM Wet Coil without filter and Electric Heat
---|---|---|---|---
External Static Pressure-Inches W.C.[kPa]
0[0]| 0.1[.025]| 0.2[.050]| 0.3[.075]| 0.4[0.100]| 0.5[0.125]| 0.6[0.150]|
0.7[0.175]| 0.8[0.200]
60
|
3.5
|
1
| SCFM| 1344| 1284| 1226| 1151| 1076| 946| 904| 893| 869
Power/W| 143| 151| 159| 168| 177| 191| 197| 195| 194
Current/A| 1.23| 1.26| 1.33| 1.41| 1.5| 1.61| 1.63| 1.61| 1.62
2
| SCFM| 1531| 1477| 1418| 1366| 1299| 1239| 1138| 1064| 1001
Power/W| 200| 211| 222| 231| 239| 250| 266| 277| 291
Current/A| 1.73| 1.74| 1.81| 1.89| 2.02| 2.14| 2.22| 2.31| 2.38
3
(Recommended)
| SCFM| 1647| 1592| 1538| 1490| 1436| 1378| 1315| 1215| 1140
Power/W| 244| 254| 263| 273| 283| 300| 305| 325| 336
Current/A| 2.03| 2.11| 2.14| 2.19| 2.31| 2.38| 2.53| 2.64| 2.72
4
(Factory Default)
| SCFM| 1875| 1822| 1774| 1729| 1677| 1629| 1581| 1533| 1473
Power/W| 340| 353| 365| 375| 388| 399| 412| 423| 437
Current/A| 2.73| 2.79| 2.86| 3.02| 3.12| 3.21| 3.29| 2.38| 3.51
5
| SCFM| 2021| 1967| 1924| 1879| 1828| 1785| 1742| 1694| 1641
Power/W| 409| 416| 429| 447| 461| 471| 487| 500| 513
Current/A| 3.21| 3.29| 3.38| 3.52| 3.61| 3.73| 3.76| 3.86| 4.04
60
|
4
|
1
| SCFM| 1344| 1284| 1226| 1151| 1076| 946| 904| 893| 869
Power/W| 143| 151| 159| 168| 177| 191| 197| 195| 194
Current/A| 1.23| 1.26| 1.33| 1.41| 1.5| 1.61| 1.63| 1.61| 1.62
2
| SCFM| 1531| 1477| 1418| 1366| 1299| 1239| 1138| 1064| 1001
Power/W| 200| 211| 222| 231| 239| 250| 266| 277| 291
Current/A| 1.73| 1.74| 1.81| 1.89| 2.02| 2.14| 2.22| 2.31| 2.38
3
(Recommended)
| SCFM| 1647| 1592| 1538| 1490| 1436| 1378| 1315| 1215| 1140
Power/W| 244| 254| 263| 273| 283| 300| 305| 325| 336
Current/A| 2.03| 2.11| 2.14| 2.19| 2.31| 2.38| 2.53| 2.64| 2.72
4
(Factory Default)
| SCFM| 1875| 1822| 1774| 1729| 1677| 1629| 1581| 1533| 1473
Power/W| 340| 353| 365| 375| 388| 399| 412| 423| 437
Current/A| 2.73| 2.79| 2.86| 3.02| 3.12| 3.21| 3.29| 2.38| 3.51
5
| SCFM| 2021| 1967| 1924| 1879| 1828| 1785| 1742| 1694| 1641
Power/W| 409| 416| 429| 447| 461| 471| 487| 500| 513
Current/A| 3.21| 3.29| 3.38| 3.52| 3.61| 3.73| 3.76| 3.86| 4.04
60
|
5
|
1
| SCFM| 1344| 1284| 1226| 1151| 1076| 946| 904| 893| 869
Power/W| 143| 151| 159| 168| 177| 191| 197| 195| 194
Current/A| 1.23| 1.26| 1.33| 1.41| 1.5| 1.61| 1.63| 1.61| 1.62
2
| SCFM| 1531| 1477| 1418| 1366| 1299| 1239| 1138| 1064| 1001
Power/W| 200| 211| 222| 231| 239| 250| 266| 277| 291
Current/A| 1.73| 1.74| 1.81| 1.89| 2.02| 2.14| 2.22| 2.31| 2.38
3
| SCFM| 1647| 1592| 1538| 1490| 1436| 1378| 1315| 1215| 1140
Power/W| 244| 254| 263| 273| 283| 300| 305| 325| 336
Current/A| 2.03| 2.11| 2.14| 2.19| 2.31| 2.38| 2.53| 2.64| 2.72
4
(Factory Default)
| SCFM| 1875| 1822| 1774| 1729| 1677| 1629| 1581| 1533| 1473
Power/W| 340| 353| 365| 375| 388| 399| 412| 423| 437
Current/A| 2.73| 2.79| 2.86| 3| 3.12| 3.21| 3.29| 2.38| 3.51
5
| SCFM| 2021| 1967| 1924| 1879| 1828| 1785| 1742| 1694| 1641
Power/W| 409| 416| 429| 447| 461| 471| 487| 500| 513
Current/A| 3.21| 3.29| 3.38| 3.52| 3.61| 3.73| 3.76| 3.86| 4.04
61
|
6
|
1
| SCFM| 1348| 1280| 1227| 1180| 1130| 1042| 933| 871| 825
Power/W| 157| 165| 176| 187| 196| 206| 225| 233| 245
Current/A| 1.34| 1.4| 1.49| 1.58| 1.64| 1.73| 1.88| 1.94| 2.03
2
| SCFM| 1491| 1439| 1380| 1334| 1285| 1246| 1180| 1047| 988
Power/W| 205| 217| 226| 238| 250| 259| 269| 292| 300
Current/A| 1.71| 1.81| 1.88| 1.97| 2.06| 2.14| 2.21| 2.39| 2.45
3
| SCFM| 1677| 1633| 1586| 1543| 1499| 1449| 1409| 1370| 1281
Power/W| 281| 297| 311| 325| 338| 346| 358| 370| 386
Current/A| 2.3| 2.41| 2.52| 2.63| 2.73| 2.79| 2.88| 2.98| 3.09
4
(Factory Default)
| SCFM| 1881| 1843| 1800| 1754| 1708| 1666| 1626| 1590| 1558
Power/W| 391| 407| 423| 438| 449| 462| 474| 487| 498
Current/A| 3.12| 3.25| 3.36| 3.47| 3.56| 3.66| 3.75| 2.84| 3.93
5| SCFM| 2029| 1988| 1947| 1900| 1858| 1815| 1771| 1716| 1671
Power/W| 426| 482| 498| 514| 528| 541| 553| 565| 572
Current/A| 3.67| 3.8| 3.92| 4.03| 4.13| 4.24| 4.33| 4.41| 4.47
Shaded boxes represent airflow outside the required 300-450 cfm/ton, which are not recommended.
NOTES: Airflow based upon cooling performance at 230V with no electric heat and no filter. Airflow at 208V is approximately the same as 230V because the mult-tap ECM motor is a constant torque motor. The torque doesn’t drop off at the speeds in which the motor operates. 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 for electric heat operating. Each ton of cooling requires between 350 and 450 cubic feet of air per minute (CFM), or 400 CFM 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 be used to balance and verify branch and system airflow (CFM).
DUCTWORK
Field ductwork must comply with the National Fire Protection Association NFPA 90A, NFPA 90B, and any applicable local ordinance.
WARNING
Do not, under any circumstances, connect return ductwork to any other heat- producing device such as a fireplace insert, stove, etc. Unauthorized use of such devices may result in fire, carbon monoxide poisoning, explosion, personal injury or property damage. Sheet metal ductwork in unconditioned spaces must be insulated and covered with a vapor barrier. Fibrous ductwork may be used if constructed and installed in accordance with SMACNA Construction Standard on Fibrous Glass Ducts. Ductwork must comply with the National Fire Protection Association as tested by UL Standard 181 for Class I Air Ducts. Check local codes for requirements on ductwork and insulation.
-
The duct system must be designed within the range of external static pressure the unit is designed to operate against. It is important that the system airflow be adequate. Make sure supply and return ductwork, grills, special filters, accessories, etc. are accounted for in total resistance. See airflow performance tables in this manual.
-
Design the duct system in accordance with “ACCA” Manual “D” Design for Residential Winter and Summer Air Conditioning and Equipment Selection. The latest editions are available from: “ACCA” Air Conditioning Contractors of America, 1513 16th Street, N.W., Washington, D.C. 20036. If the duct system incorporates a flexible air duct, be sure pressure drop Information (straight length plus all turns) shown in “ACCA” Manual “D” is accounted for in the system.
-
Supply plenum is attached to the 3/4” duct flanges supplied with the unit. Attach flanges around the blower outlet.
IMPORTANT: If an elbow is included in the plenum close to the unit, it can not be smaller than the dimensions of the supply duct flange on the unit.
IMPORTANT : The front flange on the return duct if connected to the blower casing must not be screwed into the area where the power wiring is located. Drills or sharp screw points can damage insulation on wires located inside the unit. -
Secure the supply and return ductwork to the unit flanges, using proper fasteners for the type of duct used and tape the duct-to-unit joint as required to prevent air leaks.
REFRIGERANT CONNECTIONS
Keep the coil connections sealed until refrigerant connections are made. See
the Installation Instructions for the outdoor unit for details on line sizing,
tubing installation, and charging information.
Coil is shipped with Nitrogen. Evacuate the system before charging with
refrigerant. Install refrigerant tubing so that it does not block service
access to the front of the unit. Nitrogen should flow through the refrigerant
lines while brazing. Use a brazing shield to protect the cabinet’s paint and a
wet rag to protect the rubber grommet and input pipe’s Pistion seal ring from
being damaged by torch flames. After the refrigerant connections are made,
seal the gap around the connections with pressure sensitive gasket.
WARNING
Use a wet rag to protect the two seal rings in the input pipe from being damaged by torch flames while brazing. After the work is finished, make sure to check that there is no vapor leak after checking for vapor leaks, be sure to insulate the piping connections referring to Fig.7-1.
Condensate Drain Tubing
Consult local codes for specific requirements.
IMPORTANT
- When making drain fitting connections to the drain pan, use a thin layer of Teflon paste, silicone or Teflon tape and install, hand tighten.
- When making drain fitting connections to the drain pan, do not over-tighten. Over-tightening fittings can split pipe connections on the drain pan.
-
Install drain lines so they do not block service access to front of the unit. A minimum clearance of 24 inches is required for filter, coil or blower removal and service access.
-
Make sure the unit is level or pitched slightly toward the primary drain connection so that water will drain completely from the pan. (See Fig.7-2)
-
Do not reduce the drain line size to less than the connection size provided on the condensate drain pan. Use 3/4″ PVC piping for drain piping connections.
-
All drain lines must be pitched downward away from the unit a minimum of 1/8″ per foot of line to ensure proper drainage.
-
Do not connect the condensate drain line to a closed or open sewer pipe. Run condensate to an open drain or run line to a safe outdoor area.
-
The drain line should be insulated where necessary to prevent sweating and damage due to condensation forming on the outside surface of the line.
-
Make provisions for disconnecting and cleaning of the primary drain line should it become necessary. Install a 3-inch trap in the primary drain line as close to the unit as possible. Make sure that the top of the trap is below the connection to the drain pan to allow complete drainage of the pan. (See Fig. 7-2).
-
Auxiliary drain line should be run to a place where it will be noticeable if it becomes operational. Homeowners should be warned that a problem exists if water begins running from the auxiliary drain line.
Plug the unused drain connection with the plugs provided in the parts bag, using a thin layer of Teflon paste, silicone, or Teflon tape to form a water- tight seal. -
Test the condensate drain pan and drain line after installation is complete. Pour water into the drain pan, enough to fill the drain trap and line. Check to make sure the drain pan is draining completely, no leaks are found in drain line fittings, and water is draining from the termination of the primary drain line.
-
Be sure to insulate the drain piping and drain socket since condensation may cause water leakage.
-
Be sure to install a drain trap at the drain outlet since the inside of the unit is at negative pressure relative to atmospheric pressure during operation.
AIR FILTER
(Not Factory-Installed)
External filter or other means of filtration is required. Units should be sized
for a maximum of 300 feet/min air velocity or what is recommended for the type
filter installed.
Filter application and placement are critical to airflow, which may affect the
heating and cooling system performance. Reduced airflow can shorten the life
of the system’s major components, such as the motor, limits, elements, heat
relays, evaporator coil, or compressor. Consequently, we recommend that the
return air duct system have only one filter location. For systems with a
return air filter grill or multiple filter grills, can have a filter installed
at each of the return air openings.
If adding high-efficiency filters or electronic air filtration systems, it is
very important that the airflow is not reduced. If air flow is reduced the
overall performance and efficiency of the unit will be reduced. It is strongly
recommended that a professional installation technician is contacted to ensure
the installation of these filtration systems are installed correctly.
IMPORTANT: Do not double filter the return air duct system. Do not filter
the supply air duct system. This will change the performance of the unit and
reduce airflow.
WARNING
Do not operate the system without filters. A portion of the dust entrained in the air may temporarily lodge in the duct and run at the supply registers. Any circulated dust particles could be heated and charred by contact with the air handler elements. This residue could soil ceilings, walls, drapes, carpets and other articles in the house. Soot damage may occur with filters in place, when certain types of candles, oil lamps or standing pilots are burned.
FILTER INSTALLATION DIMENSIONS
DIMENSIONAL DATA
MODEL
| FILTER SIZE
IN [mm]
|
“W” IN [mm]
|
“D” IN [mm]
| “H” IN [mm]| Return width “A” IN| Return length MODEL “B” IN
---|---|---|---|---|---|---
24| 16Χ20[406Χ508]| 16.8[426]| 20.4[518]| 1[25.4]| 19.6| 14.8
36| 18Χ20[457Χ508]| 18.3[466]| 21.6[548]| 1[25.4]| 20.8| 16.3
60/61| 20Χ22[508Χ559]| 20.7[526]| 23.9[608]| 1[25.4]| 23| 18.8
AIR FILTER REMOVAL
- Remove bolts manually, remove air filter recover. See Fig.9-1.
- Hold the edge of the air filter and extract it out.
- Clean the air filter (A vacuum cleaner or pure water may be used to clean the air filter. If the dust accumulation is too heavy, use a soft brush and mild detergent to clean it and dry out in a cool place). See in Fig.9-2.
- Install a new filter so that the arrow on the filter is in the same direction as the airflow.
WIRING DIAGRAM
For 24/36/60 Model
Fig.10-3 INDOOR UNIT WIRING DIAGRAM FOR ECM MOTOR AC SYSTEMS AND HP SYSTEMS
For 61 Model
warning
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
Fig.10-6 I NDOOR UNIT WIRING DIAGRAM FOR ECM MOTOR AC SYSTEMS AND HP SYSTEMS
PISTION/TXV INSTALLATION
This coil comes with a factory-installed piston metering device. See Table 11-1 for factory-installed piston size. Some system combinations will require a different-sized piston to be field installed.
- Contact your local parts center to order the appropriate MAYORIACHP piston kit for your system combination.
- Use Table 11-3 for TXV kit part numbers.
A TXV may be required to achieve minimum efficiency ratings or for long refrigerant line set applications. Reference AHRI for system combination ratings. Table 11-1. Factory-installed piston size for each model. Additional piston sizes are provided in the ship with a literature bag as necessary.
| MODEL | 50 | 52 | 56 | 58 | 64 | 73 | 75 | 80 | 83 | 90 |
|---|---|---|---|---|---|---|---|---|---|---|
| 24 | X* | X | ||||||||
| 36 | X | X | X | X* | ||||||
| 60 | X | X | X | X* |
- means that this piston is pre-installed
WARNING
Failure to install the proper piston can lead to poor system performance and possible compressor damage.
NOTE
Since the manufacturer has a policy of continuous product and product data improvement, if the system combination you are looking for is not listed, check for the latest version of this document at www.AmeristarHVAC.com.
Table 11-2 . Optional TXV kit part numbers. Some combinations may require a TXV. See AHRI for system combination ratings.
| Outdoor Unit Capacity (Tons) | R410a TXV Kit |
|---|---|
| 1.5-3.0 | 3Ton |
| 3.5-4.0 | 4Ton |
| 5.0 | 5Ton |
Table 11-3. Superheat Charging ChartCharge the system by superheat when using a piston. Reference the outdoor unit installation guide to charge the system by subcooling when using a TXV.
| Outdoor Temp (°F) | Indoor Temperature (°F) Dry Bulb/wet Bulb |
|---|---|
| 95/79 | 90/75 |
Superheat (°F)
115| 23| 16| 7| 6| 5| 5
110| 24| 17| 9| 6| 5| 5
105| 26| 19| 11| 6| 5| 5
100| 27| 21| 13| 7| 6| 5
95| 29| 23| 14| 9| 6| 5
90| 30| 25| 18| 12| 7| 5
85| 32| 26| 20| 15| 9| 6
80| 34| 28| 22| 17| 11| 6
75| 35| 30| 24| 19| 13| 7
70| 37| 32| 26| 21| 16| 10
65| 38| 34| 29| 24| 19| 13
60| 40| 36| 31| 27| 22| 17
55| 41| 37| 34| 30| 26| 21
TXV Replacement Information for MVME61C1MN1TC
NOTE:
- The TXV replacement options noted in this sheet supersede those in the installation guide. Please reference this sheet for all refrigerant metering options.
TXV-Replace Steps
- Step 1: Remove the screws and front coil panel.
- Step 2 : Remove the rubber plugs from the liquid and vapor lines.
- Step 3: Unwrap the copper strap on the sensing bulb and dismount the sensing bulb.
- Step 4 : Use a backup wrench to loose the nut of TXV.
- Step 5: Take off the TXV mounting clip ring.
- Step 6: Use a wet rag to protect the pipe in the coil, Al-Copper transition section (The black section of the vapor line).
- Step 7: Braze and take off two pipes from TXV. Be extra careful not to overheat the pipes.
- Step 8 : Wrap the new TXV with a wet rag to prevent overheating. Connect and braze pipe to new TXV. While brazing, use nitrogen flow and braze all connections.
- Step 9: Replace a new sealing ring to the pipe joint, connect the TXV with the pipe joint, and tight the nut to 22 (±2) ft-lb.
- Step 10 : Allow the tube to cool and pressurize line sets with 150 PSI of nitrogen to check braze connections for leaks. Make repairs if needed.
- Step 11 : Use the supplied copper straps to secure the TXV sensing bulb on top of the vapor line as pictured.
- Step 12 : Use a clip ring to hold TXV on a mounting plate.
- Step 13: Insulate the entire vapor line and sensing bulb. It is also recommended to insulate the TXV and liquid line to prevent condensation in hot humid environments.
- Step 14 : Replace the front coil pants and secure them in place.
- Step 15 : Follow the steps in the installation guide for vacuum requirements and system start-up procedures.
- Step 16: Allow the system to run for an additional 10 minutes to verify the subcooling and superheat readings
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>