HEAT CONTROLLER, INC.
R e s i d e n t i a l S p l i t - 6 0 H z R 4 1 0 A
R e v. : 0 3 A u g u s t , 2 0 1 2
Equipment Selection
NOTICE! AHRI matched systems are required for warranty and applicable federal tax credits.
The installation of geothermal heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.
General
Proper indoor coil selection is critical to system efficiency. Using an
INDOOR COIL WITH AN
Newer indoor coils have a larger surface area, enhanced fin design, and grooved tubing. These features provide a larger area for heat transfer, improving efficiency and expanding capacity. Typical older coils may only have
Indoor Coil Selection - HTS GeoLogix®
HCI split system heat pumps are rated in the AHRI directory with a specific indoor coil match. GeoLogix® (HTS) models are rated with Heat Controller WDG Series air handlers and MWG Series coils as shown in Table 1a. Other brands of air handlers may attain the same AHRI ratings providing that the specifications meet or exceed those listed in Table 1a AND Table 1b. However, for warranty and federal tax credits, an AHRI matched system is required. An ECM motor and TXV is required. Cap tubes and fixed orifices are not acceptable. PSC fans may be used if matched to Table 1b, but will not meet AHRI ratings. If using PSC fan, compressor section must be operated as a single stage unit (i.e. wired for either 1st stage or 2nd stage). Without the ability to vary the airflow, supply air temperatures may not be acceptable if the compressor is allowed to change stages when used with a PSC fan motor.
Table 1a: WDG/MWG Indoor Section Matches for AHRI Ratings
Compressor Section Model | 024 | 036 |
| 048 | 060 |
Indoor Section Model | 024 | 036 |
| 048 | 060 |
Refrigerant |
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Metering Device |
| TXV (required) |
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Air Coil |
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Type | N | N |
| N | N |
Rows | 2 | 2 |
| 2 | 3 |
Dimensions | 14 x 17 | 24 x 17 |
| 24 x 17 | 24 x 17 |
Cabinet Configuration |
| Upflow/Downflow/Horizontal (Multipoise) |
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WDG Series Fan Motor Type - HP | ECM - 1/2 | ECM - 1/2 |
| ECM - 1 | ECM - 1 |
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Table 1b: Tranquility® 27 Air Handler Characteristics for Brands other than Above Models
| Model* | Nominal Tons* | Evaporator | CFM | Capacity |
| Temp (ºF) | (MBtuh)** | |||
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024 | - Part Load | 1.5 | 50 | 530 | 19.2 - 22.4 |
024 | - Full Load | 2.0 | 52 | 880 | 24.2 - 28.2 |
036 | - Part Load | 2.5 | 51 | 700 | 25.2 - 29.2 |
036 | - Full Load | 3.0 | 50 | 1200 | 34.5 - 40.1 |
048 | - Part Load | 3.5 | 47 | 1000 | 34.3 - 39.9 |
048 | - Full Load | 4.0 | 48 | 1650 | 46.3 - 53.8 |
060 | - Full Load | 5.0 | 48 | 1850 | 54.5 - 63.3 |
*Nominal tons are at AHRI/ISO
**When selecting an air handler based upon the above conditions, choose entering WB temperature of 67ºF. Use evaporator temperature, CFM and capacity requirements as listed above. The air handler capacity must be at least at the minimum capacity shown in the table in order for the AHRI rating condition to be valid. See Figure 1 for an example selection.
6 | Heat Controller, Inc. |