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AHF080014, AHF120017, AHF160021, AHF200024
These instructions must be read and understood completely before attempting installation.
Improper
installation,
adjustment,
maintenance, or use can cause explosion, fire, electrical shock, or
other conditions which may cause death, personal injury, or
property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes, the current
editions of the National Electrical Code (NEC) NFPA-70.
TABLE OF CONTENTS
General Information/Installation .................................... 2
Installation..................................................................... 2
Vertical/Horizontal Installation ...................................... 3
Ductwork Connection .................................................... 4
Filter Installation ............................................................ 4
Electrical Connection ..................................................... 4
Blower Performance ...................................................... 8
Sequence of Operation ................................................ 10
Wiring Diagram ............................................................ 11
Replacement Parts ....................................................... 12
September 2019
INSTALLATION INSTRUCTIONS
Air Handler (Electric furnace)
SAFETY CONSIDERATIONS
alteration,
service,
Specifications subject to change without notice.
In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1 Recognize safety information.
This is the safety-alert symbol
the unit and in instructions or manuals, be alert to the potential for
personal injury. Understand these signal words; DANGER,
WARNING, and CAUTION. These words are used with the safety-
alert symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signifies
hazards which could result in personal injury or death. CAUTION
is used to identify unsafe practices which may result in minor
personal injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability or operation.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to turn off electric power could result in
personal injury or death.
Before installing or servicing system, turn off main
power to the system. There may be more than one
disconnect switch, including accessory heater(s).
. When you see this symbol on
X40159 Rev. E
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Summary of Contents for Dettson AHF080014
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Air Handler (Electric furnace) AHF080014, AHF120017, AHF160021, AHF200024 These instructions must be read and understood completely before attempting installation. SAFETY CONSIDERATIONS In Canada refer to the current editions of the Canadian Electrical Improper installation, adjustment, alteration, service, Code CSA C22.1 Recognize safety information. -
Page 2: General Information/Installation
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF Nominal Installation Dimensions and Clearances - in(mm) Figure 1 14 a"'" (365) - 2 & 2 2 Ton 12-7/16” (316 – AHF08 17 d" (454) - 3 & 3 2 Ton 15-3/4” (400 – AHF12 CLEARANCES 19-1/4’’... -
Page 3: Vertical/Horizontal Installation
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF DOWNFLOW INSTALLATIONS For upflow and horizontal applications apply foam seal strip around Refer to instructions with Subbase Kit. top of coil cabinet. For downflow application apply foam seal strip NON-DUCTED RETURN AIR CLOSET around bottom of coil cabinet. Set blower on top of coil cabinet so they are flush. -
Page 4: Ductwork Connection
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF 2. Use metal strapping or threaded rod with angle iron supports WARNING under the auxiliary drain pan to suspend cabinet. These supports MUST run parallel with the length of the cabinet. Refer to Figure ELECTRICAL SHOCK or UNIT DAMAGE HAZARD 3. - Page 5 INSTALLATION INSTRUCTIONS AIR HANDLER : AHF WARNING Low Voltage Control Connections Wire low-voltage in accordance with wiring label on the blower (also ELECTRICAL SHOCK or UNIT DAMAGE HAZARD refer to Figures 8 - 12. Use 18 AWG color-coded, insulated (35°C Failure to follow this warning could result in personal injury, minimum) wire to make the low-voltage connections between: death, and/or property damage.
- Page 6 INSTALLATION INSTRUCTIONS AIR HANDLER : AHF Table 1 Supply Circuit Supply H.P. Max. Recommended Circuit Motor Branch Over- Circuit current Amps Volts Phase Hertz Supply Wire Ground Wire Protectio 75°C copper n Devise # of Max. Ft.(m) # of (Amps) Wires Size Length...
- Page 7 INSTALLATION INSTRUCTIONS AIR HANDLER : AHF When two-stage electric heat is desired (refer to Table 2 - Heat Strip Staging), separate out the pink W3 wire from W2 & E connections. Figure 11 Wiring Layout Heat Pump Unit (Cooling and Refer to Table 2-2 and wiring diagram Figure 11.
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Page 8: Blower Performance
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF 6. Refer to the Air Flow Data, Table 4, to find the speed setting that will most closely provide the required air flow for the system. TEMPERATURE RISE CHECK 7. Refer to Motor Speeds and Airflow in these instructions if the Temperature rise is the difference between the supply and return air speed is to be changed. - Page 9 INSTALLATION INSTRUCTIONS AIR HANDLER : AHF Table 5 - ELECTRIC HEATHER STATIC PRESSURE DROP Single-Phase Three-Phase EHIA EHIA EHIA EHIA EHIA EHIA EHIA EHIA EHIA EHIA In wc In wc – – – – – – 0.01 0.01 0.01 0.01 –...
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Page 10: Sequence Of Operation
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF blower motor. Y energizes the outdoor 24V low-voltage circuit in heat pump to energize compressor. O energizes reversing valve in cooling mode and typically remains energized until the mode is changed to heating. When thermostat cooling call is satisfied. Y drops out. O remains energized, and there is a 90 second TDR before indoor fan relay opens. -
Page 11: Wiring Diagram
INSTALLATION INSTRUCTIONS AIR HANDLER : AHF WIRING DIAGRAM X40159 Rev. E Specifications subject to change without notice. -
Page 12: Replacement Parts
R99G010 FAN CONTROL BOARD B60076-02 B60067 WIRE HARNESS B60076-03 L01F012 TRANSFORMER 208/230-24v, 40VA B60076-04 B60089-02 LEFT SIDE WRAPPER B60090-02 B60087-01 BACK WRAPPER B60087-02 B60088-01 DETTSON INDUSTRIES INC. B60088-02 DETTSON.COM RIGHT SIDE WRAPPER B60089-01 B60090-01 X40159 Rev. E Specifications subject to change without notice.
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