ANEX AG-EHK2-06 Electric Heater Packages Instruction Manual

ANEX AG-EHK2-06 Electric Heater Packages

Product Specifications

• Product Name: EHK2 Electric Heater Packages
• Electric Heater Part Numbers: EHK205B, EHK208B, EHK210B
• Heater Sizes: 5kW, 7.5kW, 10kW
• Fan Coil Unit Sizes: 18, 24, 30, 36
• Internal Circuit Protection: Circuit Breaker

Product Usage Instructions

Safety Considerations

! WARNING: ELECTRICAL SHOCK HAZARD – Before any installation, modification, or servicing of the system, always turn off the main power to the system to prevent personal injury or death.

! WARNING: Personal Injury Hazard – Use appropriate protective clothing and gloves when handling sharp-edged parts to avoid injuries.

Installation

1. Ensure power to the unit is turned off.
2. Remove the blower access panel of the fan coil unit.
3. Remove the plate covering the opening at the back of the topcompartment.
4. Insert the heater assembly into the opening, coils first. Ensure proper alignment.

Electrical Connections

Use UL-listed conduit and conduit connector for connecting supply wires to the unit for proper grounding. Grounding lugs provided in the control box can also be used for grounding.

Ground Connections

! WARNING: According to NEC, ANSI/NFPA 70, and local codes, ensure uninterrupted ground connection for safety in case of electrical faults.

Verify Installation

After heater installation, check wiring for tightness and proper connections. Ensure all electrical covers are in place before turning on the unit.

FAQs

• Q: What should I do if I encounter sharp edges on sheet metal parts during installation?
  • A: Use care and wear appropriate protective clothing and gloves when handling sharp-edged parts to avoid injuries.
• Q: How do I ensure proper grounding of the unit?
  • A: Use UL-listed conduit and conduit connector for connecting supply wires to the unit for proper grounding. Grounding lugs provided in the control box can also be used for grounding.

NOTE: Read the entire instruction manual before starting the installation.

Safety Considerations

Improper installation, adjustment, alteration, service, 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 a quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warning or cautions included in the literature and attached to the unit. Consult local building codes and the current editions of the National Electrical Code (NEC) NFPA 70. In Canada, refer to the current editions of the Canadian Electrical Code CSA C22.1. Recognize safety information. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, CAUTION, and NOTE. 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 that 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 that will result in enhanced installation, reliability, or operation.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. Before installing, modifying or servicing system, always turn off main power to system. There may be more than one disconnect switch. Lock out and tag switch with a suitable warning label.

WARNING

Personal Injury Hazard

Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.

INSTALLATION

This instruction describes the installation of Part No. EHK2 accessory heaters in FMA, fan coils listed in Table 1.

NOTE: Electric heaters require a minimum airflow. Minimum airflow and motor speed selection are listed in Table 2.

Install Electric Heater Assembly

NOTE: Ensure heater coils are not deformed or damaged during heater installation.

1. Make sure power to unit is off.
2. Remove blower access panel of fan coil unit.
3. Remove the plate covering the opening at the back of the top compartment.
4. Insert heater assembly into the opening, coils first. Ensure the arrow stamped into the heater plate is orientated up to correspond with the airflow direction. Use care not to damage the coils during insertion.
5. Use the previously removed cover–plate screws to secure the heater assembly. (See Fig. 1) Discard cover plate.

Attach Circuit Breaker Box

1. Snap the circuit breaker onto the circuit breaker bracket.
2. Install the breaker assembly using the mounting holes in the top compartment.
3. Secure using provided screws.
4. Disconnect and discard the factory-installed high voltage wiring harness.
5. Connect the heater assembly wiring harness to the unit– wiring connector.
6. Use wire ties to secure wires away from sharp edges.
7. Apply the supplemental wiring diagram provided with the heater kit over the existing wiring diagram on the fan coil.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. Ensure fuse box is closed before power is turned to ON position. There may be more than one power supply.

ELECTRICAL CONNECTIONS

Refer to unit instructions for recommended wiring procedures. Install wiring in accordance with all applicable local and national codes. (See Table 3.) Connect heater wiring harness plug to receptacle on fan–coil wire harness. A positive connection must be made between plug and the receptacle. Plug will interlock with the receptacle when properly seated. The harness contains both 24V control and high–voltage wiring. Blower power is provided through heater harness.

Power Connections

NOTE: Heater supply circuit wire size and overcurrent protection must comply with National Electrical Code (NEC) and UL branch circuit requirements. (See Table 4) Wires and overcurrent protection, integral to the heater, are not required to meet branch circuit requirements. Internal circuit protection of 60 amps (maximum) is acceptable. The 5–kW through 10–kW circuit breaker heaters can be wired for single–supply circuit only.

Table 1 – Accessory Heater Usage

ELECTRIC HEATER PART NUMBER| SIZES USED WITH| kW| INTERNAL CIRCUIT PROTECTION
---|---|---|---
EHK205B| 18-36| 5| Circuit Breaker
EHK208B| 18-36| 7.5| Circuit Breaker
EHK210B| 18-36| 10| Circuit Breaker

Table 2 – Minimum CFM

NOTE: Use UL–listed conduit and conduit connector for connecting supply wire(s) to unit to obtain proper grounding. If conduit connection uses reducing washers, a separate ground wire must be used. Grounding may also be accomplished by using grounding lugs provided in control box.

Ground Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. According to NEC, ANSI/NFPA 70, and local codes, cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. (See Ground/Conduit Note below.)

Fan Speeds

Refer to the Installation Instructions or the wiring diagram of the indoor unit.

Transformer

All units are shipped from factory wired for 240VAC transformer operation. For 208VAC operation, move primary lead from 240VAC terminal to 208VAC terminal, see Fig. 3.

VERIFY INSTALLATION

After completion of heater installation, check wiring to ensure tightness and that proper connections and routings have been made. Ensure all electrical covers are in place. Reinstall blower access panel before turning unit power on.

Table 3 – Electric Heater Electrical Data for PSC Motor Units

Heat Kit Model

| ****

Used on Size

| ****

Nominal Heat Capacity @ 240V

| ****

Ship- ping Weight

| ****

Heater Capacity (MBH)

| ****

Minimum Circuit Ampacity (MCA)

| MAX. Fuse or Breaker Heat— Kit Ampacity (HACR)| ****

Min Wire Size (AWG) ††

| ****

Min Ground Wire Size

---|---|---|---|---|---|---|---|---
KW| lbs. (kg)| 208| 240| 208| 240| 208| 240| 208| 240| 208| 240
EHK205B| ****

1— 1/2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 22.9| 26.2| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 35.1| 40.3| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 44.5| 51.2| 45| 60| 8| 6| 10| 10
EHK205B| ****

2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 23.4| 26.7| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 35.6| 40.8| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 45.0| 51.7| 45| 60| 8| 6| 10| 10
EHK205B| ****

2— 1/2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 24.5| 27.8| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 36.7| 41.9| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 46.1| 52.8| 50| 60| 8| 6| 10| 10
EHK205B| ****

3

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 24.2| 27.5| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 36.4| 41.6| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 46.1| 52.5| 50| 60| 8| 6| 10| 10

• Copper wire must be used. If other than uncoated (non—plated), 75_C ambient, copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the National electric Code (ANSI/NGPA 70).
• Length shown is as measured 1 way along wire path between unit and service panel for a voltage drop not to exceed 2%.

Table 4 – Electric Heater Electrical Data for ECM Motor Units

Heat Kit Model

| ****

Used on Size

| ****

Nominal Heat Capacity @ 240V

| ****

Ship- ping Weight

| ****

Heater Capacity (MBH)

| ****

Minimum Circuit Ampacity (MCA)

| MAX. Fuse or Breaker Heat— Kit Ampacity (HACR)| ****

Min Wire Size (AWG) ††

| ****

Min Ground Wire Size

---|---|---|---|---|---|---|---|---
KW| lbs. (kg)| 208| 240| 208| 240| 208| 240| 208| 240| 208| 240
EHK205B| ****

1— 1/2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 24.1| 27.4| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 36.3| 41.5| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 45.7| 52.4| 50| 60| 8| 6| 10| 10
EHK205B| ****

2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 24.1| 27.4| 25| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 36.3| 41.5| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 45.7| 52.4| 50| 60| 8| 6| 10| 10
EHK205B| ****

2— 1/2

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 25.1| 28.4| 30| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 37.3| 42.5| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 46.7| 53.4| 50| 60| 8| 6| 10| 10
EHK205B| ****

3

Ton

| 5| ****

5.1 (2.3)

| 12.3| 16.4| 25.1| 28.4| 30| 30| 10| 10| 10| 10
EHK208B| 7.5| 19.2| 25.6| 37.3| 42.5| 40| 45| 8| 8| 10| 10
EHK210B| 10| 24.6| 32.8| 46.7| 53.4| 50| 60| 8| 6| 10| 10

• Copper wire must be used. If other than uncoated (non—plated), 75_C ambient, copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the National electric Code (ANSI/NGPA 70).
• Length shown is as measured 1 way along wire path between unit and service panel for a voltage drop not to exceed 2%.

A Proud Member of the Carrier Family Replaces: AG-EHK2-05 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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