ACCESSORIES
Refer to Price Manual for specific model numbers where not shown.
TXV Kits - TXV kits are available for
Electric Heaters - 4HK models shown under electrical data include sequential operation and temperature dual limit switches for safe, efficient operation. Circuit breakers are pro- vided where shown.
External Insulating Wrap Kit - Provides a vinyl covered ther- mal insulation wrap, providing additional thermal insulation pro- tection to prevent sweating in applications where extreme high humidity is present. Air Handler cover (or wrap) has Velcro edges for easy installation and access.
LIMITATIONS
These units must be wired and installed in accordance with all national and local safety codes.
Voltage limits are as follows:
Air Handler Voltage | Voltage code | 1Normal Operating | |
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06 |
1.Rated in accordance with ARI Standard 110, utilization range “A”.
Airflow must be within the minimum and maximum limits approved for electric heat, evaporator coils and outdoor units.
Entering Air Temperature Limits
Wet Bulb Temp.°F | Dry Bulb Temp. °F | ||
Min. | Max. | Min. | Max. |
57 | 72 | 65 | 95 |
Control when used with ECM variable speed models will moni- tor humidity level in both winter and summer seasons. Adjusts blower speed and airflow provided to maintain desired humidity levels.
COOLING MODELS WITH ELECTRIC HEAT WIRING
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| Air Handler Control Wiring |
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| Typical A/C - Cooling only Applications |
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| Typical A/C with Electric Heat Applications |
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THERMOSTAT | AIR HANDLER |
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| THERMOSTAT | AIR HANDLER |
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| R |
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| AIR CONDITIONING |
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| AIR CONDITIONING |
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| G |
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| Y |
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| W1 |
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| Y1 |
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| W2 |
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| W2 |
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| W2 |
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| C |
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| HUMIDISTAT * |
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| W1 |
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| O |
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| HUM |
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| X / L |
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| X / L |
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| COM |
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* Optional dehumidification humidistat switch contacts open on humidity rise.
NOTES:
1.“Y/Y2” Terminal on air handler control board must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.
2.Remove humidistat jumper on air handler control board.
3.For heat pump applications - set MODE jumper on air handler control board to the HP position.
4.To change quantity of heat during HP defrost cycle - reverse connections at W1 and W2 on air handler control board.
Johnson Controls Unitary Products | 9 |
