National Air Warehouse H8HK-D Series Electric Heater Kit Instructions

: June 15, 2024
: National Air Warehouse

Table of Contents

National Air Warehouse H8HK-D Series Electric Heater Kit
Product Information
H8HK-D SERIES ELECTRIC HEATER KIT
INSTALLATION IN STANDARD & VARIABLE SPEED INDOOR AIR HANDLERS
GENERAL INFORMATION
Clearances to Combustibles
INSTRUCTIONS FOR SWAPPING LIMITS
MOTOR SPEED SELECTION
WIRING DIAGRAM
INSTALLER: PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE
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National Air Warehouse H8HK-D Series Electric Heater Kit

Product Information

Specifications

Product Name : H8HK-D Series Electric Heater Kit
Installation : Standard & Variable Speed Indoor Air Handlers

General Information

The H8HK-D Series Electric Heater Kit is a partial unit air conditioner that complies with partial unit requirements of the International Standard. It is designed to be connected to other units that have also been confirmed to comply with corresponding partial unit requirements.
This appliance is not suitable for use by individuals with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have received supervision or instruction on how to use it safely. Children should always be supervised to prevent them from playing with the appliance.

Clearances to Combustibles

Standard Air Handlers: All installations of the H8HK-D electric heater kits in standard air handlers are approved for zero-clearance to combustibles. However, it is important to set the minimum electric heat airflow as directed in the instructions.
Variable Speed Air Handlers: All installations of the H8HK-D electric heater kits in variable speed air handlers are also approved for zero-clearance to combustibles. The minimum electric heat airflow should be set as directed in the instructions.

Electrical Supply

Power Wiring: When connecting the H8HK-D Series Electric Heater Kit, ensure that it is not supplied through an external switching device such as a timer. It should also not be connected to a circuit that is regularly switched on and off by the utility. This is done to prevent inadvertent resetting of the thermal cut-out and to avoid any potential hazards.
Instructions for Swapping Limits
To swap limits on the H8HK-D Series Electric Heater Kit, please refer to the specific instructions provided in the user manual. Follow the steps carefully to ensure correct installation and operation of the kit.

Motor Speed Selection

Standard Air Handlers: For standard air handlers, the motor speed selection for the H8HK-D electric heater kits should be done according to the instructions provided. This applies specifically to standard 3-speed motors.
Variable Speed Air Handlers: If installing the H8HK-D electric heater kits in variable speed air handlers, follow the instructions provided for motor speed selection. These instructions will guide you on the appropriate settings for optimal performance.

Wiring Diagrams
The user manual provides wiring diagrams for different kW ratings of the H8HK-D Series Electric Heater Kit. Please refer to the specific diagram that matches your kit’s rating to ensure correct wiring connections.

Figure 14: Single Phase, 5 kW Wiring Diagram
Figure 15: Single Phase, 8 kW and 10 kW Wiring Diagram
Figure 16: Single Phase, 15 kW Wiring Diagram
Figure 17: Single Phase, 20 kW Wiring Diagram
Figure 18: Single Phase, 24 kW Wiring Diagram

FAQ

Q: Can the H8HK-D Series Electric Heater Kit be connected to other units that do not comply with partial unit requirements?
A: No, the H8HK-D Series Electric Heater Kit should only be connected to units that have been confirmed to comply with corresponding partial unit requirements of the International Standard. Connecting it to non-compliant units may result in safety hazards or damage.
Q: Can children use the appliance unsupervised?
A: No, children should always be supervised when using the appliance to ensure their safety. The H8HK-D Series Electric Heater Kit is not intended for use by children or individuals with reduced capabilities without proper supervision or instruction.
Q: Can the thermal cut-out be reset externally?
A: No, to avoid hazards, the H8HK-D Series Electric Heater Kit should not be supplied through an external switching device like a timer. It should also not be connected to a circuit that is regularly switched on and off by the utility as this may inadvertently reset the thermal cut-out.

H8HK-D SERIES ELECTRIC HEATER KIT

INSTALLATION INSTRUCTIONS

INSTALLATION IN STANDARD & VARIABLE SPEED INDOOR AIR HANDLERS

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $1$$ IMPORTANT

ATTENTION INSTALLERS

These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and/or air conditioning appliances. Some local codes require licensed installation/service personnel for this type equipment. All installations must be in accordance with these instructions and with all applicable national and local codes and standards.
Read these instructions thoroughly before starting the installation. Follow all precautions and warnings contained within these instructions and on the unit. The instructions included with this heater kit are for installations in air handlers only.

DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

IMPORTANT SAFETY INFORMATION

INSTALLER : Please read all instructions before servicing this equipment. Pay attention to all safety warnings and any other special notes highlighted in the manual. Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored. WARNING indicates a potentially hazardous situation that if not avoided, could result in personal injury or death. CAUTION indicates a potentially hazardous situation that if not avoided, may result in minor or moderate injury or property damage.

WARNING

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury or property damage.
Improper servicing could result in dangerous operation, serious injury, death or property damage.
- Before servicing, disconnect all electrical power to the unit. All poles must be broken.
- When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.
- Verify proper operation after servicing.

WARNING

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 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.

CAUTION
In order to avoid a hazard due to inadvertent resetting of the THERMAL CUT- OUT, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

GENERAL INFORMATION

About the heater kit
H8HK-D Series electric heater kit is approved for field installation in B6 Air Handlers as replacement parts (only using 190°F Limits), and B64 air handlers. All sizes are available with factory-provided circuit-breakers for short circuit protection and to provide a disconnecting means. Also available are 5, 8, and 10 kW electric heater kits without circuit-breakers. Refer to the National Electric Code (ANSI/NFPA 70) and applicable local codes for over- current protection and disconnect requirements.
This unit is a PARTIAL UNIT AIR CONDITIONER, complying with PARTIAL UNIT requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding PARTIAL UNIT requirements of this International Standard.

NOTES

The 15, 20, and 24 kW electric heater kits are NOT approved for installation in A-cabinet B64 air handlers.
The 20 and 24 kW heater kits are NOT approved for installation in B-cabinet B64 air handlers. For all heater kit applications, use Table 5 (page 14), Table 6 (page 16), Table 7 (page 17), Table 8 (page 18) and Figure 1 (page 7).
These instructions are written assuming the air handler is in the upflow position (outlet facing up). For horizontal and downflow applications, it is recommended that the electric heater kit be installed prior to installation of the air handler.
Use caution when handling or installing this component. Personal injury can occur from sharp metal edges present in all sheet metal constructed equipment.

Clearances to Combustibles

Standard Air Handlers
All installations of H8HK-D electric heater kits in standard air handlers are approved for zero-clearance to combustibles when the minimum electric heat airflow is set as directed in these instructions.
Variable Speed Air Handlers
All installations of H8HK-D electric heater kits in variable speed air handlers are approved for zero-clearance to combustibles when the minimum electric heat airflow is set as directed in these instructions.

ELECTRICAL SUPPLY

All electrical connections must be in compliance with all applicable local codes with the current revision of the National Electric Code (ANSI/NFPA 70). For Canadian installations the electrical connections and grounding shall comply with the current Canadian Electrical Code (CSA C22.1 and/or local codes).
If the air handler was previously installed without electric heat, the existing supply wiring may not be sufficient to carry the increased load. If installing electric heat in the air handler, the supply wiring can be aluminum or copper. The supplied circuit breakers and terminal blocks are approved for either wire type. Make sure to follow all of the rating information on the circuit breaker or terminal block and that the supply wiring is sized according to the current NEC codes and any other state or local codes. See the rating label or Table 6 (page 16), Table 7 (page 17) and Table 8 (page 18) for minimum circuit ampacities and maximum overcurrent protection.
All heater kits are supplied from the factory configured for use with one or more supply circuits. H8HK-D series heater kits are rated for 208/230V~. 5 & 10 kW heater kits 10 are configured for use with a single supply circuit (Circuit A). 15 & 20 kW heater kits are configured for use with 2 circuits (Circuit A & Circuit B). 24 kW heater kits are configured for use with 3 circuits (Circuit A, Circuit B, & Circuit C). See Table 3 (page 12) & Table 4 (page 13) for additional information.
NOTE : If a single supply is desired, accessory kit #913874 is required to convert to single circuit connection.

Power Wiring

All wiring must comply with the current revision of the National Electric Code and must be sized for the minimum ampacities as listed on the unit data label or in Table 6 (page 16), Table 7 (page 17) and Table 8 (page 18). Refer to Figures 14 (page 19), 15 (page 20), 16 (page 21), 17 (page 22), and 18 (page 23) for proper connections.
If a single circuit adaptor kit is used it may need to be re-configured for some applications. Remove the single circuit adaptor kit cover and verify that the lugs are configured correctly for the application. If the lugs are not configured for the application, reference the instructions included with the kit and modify the configuration. Install the single circuit adaptor kit (if used) in the line side (“on” end) of the circuit breakers. Tighten the lugs securely (5.2 Nm or 45 in-lbs recommended).
Connect the supply wiring to the circuit breaker(s), single circuit adaptor kit, or terminal block. Tighten the lugs securely.
When using multiple supply circuits verify that the supply sized for circuit “A” is connected to the circuit breaker that is connected to the top element assembly.
Install metal circuit breaker line cover on the left side of the circuit breaker to cover the supply wires.

INSTRUCTIONS FOR SWAPPING LIMITS

Refer to the “Limit Switch Opening Temperatures Required for Each Heater Kit Combination” data in Table 3 (page 12), Table 4 (page 13), and Table 5 (page 14) to identify if a limit needs to be swapped before installing heater kit.
Set the thermostat to the lowest temperature setting.
Turn off all electrical power to the air handler.
Remove upper access door from the air handler.
To swap a limit switch, disconnect all wires from the limit (you will connect the wires of the new limit in the exact same way).
Remove the two screws that attach the limit to the metal plate and save them to install the new limit.
Attach the new limit (as directed by Table 3, Table 4, and Table 5) with the two screws and tighten until snug.
Connect the wires to the spade connectors on the new limit switch in the same exact way that you removed them, or refer to the corresponding heater kit wiring diagram.

ELEMENT INSTALLATION

Refer to “Limit Switch Opening Temperature(s) Required for Each Heater Kit Combination”, Table 3, Table 4, and Table 5, to identify if a limit needs to be swapped before installing Heater Kit.
Set the thermostat to the lowest temperature setting.
Turn off all electrical power to the air handler.
Remove the upper access door from the air handler.
Remove the screws securing the upper element close-off plate from the back of the air handler control box.
Remove the element close-off plate and set the screws aside. Do not discard the screws. NOTE: For 2-tiered electric heater kits, remove two close-off plates. For tiered electric heater kits remove all 3 close-off plates. The close off plates should be removed from the bottom up in ascending order.
Insert the element assembly into the opening in the air handler control box being careful not to damage the element wire or the ceramic element supports. NOTE: Heating element alignment rods will slide into alignment holes in the back of the air handler element box. NOTE: Install Heater Kit in the orientation where the airflow direction matches the airflow direction designation on Table 3, Table 4 or Table 5. See Figure 13 (page 15) for Airflow Direction Orientation label.
If blue blower limit wires are NOT present(This will be the case if you are replacing an old H8HK heater kit with a new H8HK-D heater kit):
- Single Stage Board : Connect the W wires from the control board (white), AC relay (white) and the W wire from the thermostat with one of the supplied wire nuts. Connect the C wires from the board (gray), AC relay (gray) and C wire (if supplied) from the thermostat with one wire nut.
- Two Stage Board : Place the W1 wire from the thermostat and the white wire from the AC relay under the W1 screw terminal on the board. Place the C wire from the thermostat (if present) and the gray wire from the AC relay underneath the C terminal on the control board. If blue blower limit wires ARE present:
- Single Stage Board: Connect white wire from the AC relay to one of the blue blower limit wires with a supplied wire nut. Then, connect the other blue blower limit wire to the W wire from the control board (white) with a supplied wire nut. Connect the C wire from the board (gray), AC relay (gray) and C wire (if supplied) from the thermostat with one wire nut.
- Two Stage Board : Locate the supplied loose white wire with two stripped ends supplied with the air handler in it’s parts package. Place the W1 wire from the thermostat and one end of the supplied stripped white wire under the W1 screw terminal on the board. Connect the other end of the supplied stripped white wire with one of the blue blower limit wires using a supplied wire nut. Connect the other blue blower limit wire with the white wire from the AC relay using a supplied wire nut. Place the C wire from the thermostat (if present) and the gray wire from the AC relay underneath the C terminal on the control board.
Single Stage Board: Connect the W wires from the control board (white), AC relay (white) and the W wire from the thermostat with one of the supplied wire nuts. Connect the C wires from the board (grey), AC relay (grey) and C wire (if supplied) from the thermostat with one wire nut.
- Two-Stage Board : Place the W1 wire from the thermostat and the white wire from the AC relay under the W1 screw terminal on the board. Place the C wire from the thermostat (if present) and the grey wire from the AC relay underneath the C terminal on the control board.
Connect the 2-Pin Power plug from the element assembly into the unit’s 2-Pin power plug. Connect the 7-Pin Harness from the element assembly to the unit’s circuit board.
NOTE : A wiring diagram and a rating label are supplied with the electric heater kit. Affix the wiring diagram to the blower housing.
- When installing the electric heater kit into a standard air handler, affix the supplied rating label over the electrical data section of the air handler unit data label located on the lower access door.
- When installing the electric heater kit into a variable speed air handler, the rating label supplied with the kit will NOT be used. Check the appropriate block on the air handler ratings label located on the lower access door.
- Install the circuit breaker bracket inside of the air handler. Position the tab on the bottom of the bracket into the slot of the control panel box. See Figure 2 (page 7) for proper location of bracket.
  Slide the bracket forward and align the screw holes with the holes in the bottom of the control panel box. Secure the bracket to the air handler with the supplied screws.

Electric Heater Kits with Circuit Breakers

NOTE 1 : Circuit breakers supplied with the H8HK electric heater kit are for short-circuit protection of the internal wiring and to serve as a unit disconnect. They DO NOT provide over-current protection of the supply wiring. Over-current protection of the supply wiring must be provided at the distribution panel and sized as shown in Table 6 (page 16), Table 7 (page 17) and Table 8 (page 18) or the unit data label, and in accordance with the NEC and all applicable local codes.
NOTE 2 : In some cases, the over-current protection specified in Table 6, Table 7 and Table 8 (or the unit data label) is less than the 60 amp rating of the circuit breakers used in the H8HK-D electric heater kit. This difference may occur if the function of the over-current protection required at the distribution panel (field supplied) and the function of the circuit breakers in the H8HK-D electric heater kit are different.

5, 8, & 10 kW Electric Heater Kits

Snap the circuit breaker onto the circuit breaker bracket. The circuit breaker must be positioned with the 1/4″ tab terminals to the right as shown in Figure 3 (page 8).
Remove the lower circuit breaker knockout from the air handler upper access door.

15, 20 & 24 kW Electric Heater Kits

NOTE 1 : The heavy red and black supply leads are bundled by circuit with wire ties at the factory. The bundle coming from the top element tier is circuit “A”.
NOTE 2 : The element assembly is right-side-up when the limits are on the right side). The bundle coming from the second element tier is circuit “B”. The bundle coming from the bottom element tier is circuit “C”.

Snap the circuit breaker onto the circuit breaker bracket. The circuit breaker must be positioned with the 1/4″ tab terminals to the right as shown in Figure 3 (page 8). Remove all necessary circuit breaker knockouts in the air handler upper access door.

Line Cover
Heater Kits with circuit breakers are supplied with a line cover shown in Figure 4 (page 8). The line cover is required by code in order to protect installers from the line/supply wiring. The line cover should be installed as shown in Figure 5 (page 8).

Electric Heater Kits without Circuit Breakers

Attach the supplied power terminal block to the circuit breaker bracket with the supplied screws as shown in Figure 6 (page 8).
Using the 1/4″ terminals, connect the red supply wire(s) from the element assembly to one pole of the terminal block and connect the black wires to the other pole.

Staged Heat

All Single-phase heater kits are internally staged using B6 and B64 air handler circuit board logic. B6 and B64 single stage air handlers will not stage the heater kit. B6 and B64 two-stage air handlers may stage the heat kW turned on with either a low or high heat call. Refer to the installation instructions supplied with the air handler for additional staging information.
Air Baffle Installation and Usage

To identify if a baffle needs to be installed into the blower housing, refer to the “Limit Switch Opening Temperatures Required for Each Heater Kit Combination” Table 2 (page 11). Asterisks in the table show where a baffle is used.
To install the baffle properly, find the paper template included in the heater kit packaging. Two copies have been provided in case a mistake occurs.
Set the thermostat to the lowest temperature setting.
Turn off all electrical power to the air handler.
Remove blower access door and coil access door from the air handler.
Remove mid-cabinet support bracket to be able to slide blower housing out of cabinet.
Be aware of where the blue blower limit wires on the blower housing are located and how the ends are located in the blower cabinet of the air handler. (See Figure 8 to see blower limit wires on a blower housing)
Remove the blower housing by unscrewing all of the screws holding the blower to the blower deck, and then slide the blower housing out of the cabinet.
Pull blue blower limit wires out of electrical compartment, and disconnect any blower motor wires to make this process easier.
Lay the paper template onto the flat section of the blower housing, shown in the picture below, being sure to match the correct corner of the template to the corresponding corner of the blower housing, shown in Figure 9.
Tape to secure, or physically hold the template into the corner of the blower housing without bending it. The locations of the three dots on the template are where you will drill out three clearance holes with a 7/32″ or before 5mm drill bit into the blower housing.
NOTE : Poking holes in the paper template beforehand will make it easy to mark the sheet metal when you overlay the template.
Once the clearance holes are drilled, insert the baffle into the outlet of the blower housing, line up the holes, and screw in the 3 supplied #10 self-drilling screws until snug, being sure not to strip any sheet metal. Reference Figure 11 and Figure 12 to see how this should look when completed.
Slide the blower housing back into the cabinet and reconnect any blower limit wires according to the corresponding heater kit wiring diagram, as well as any blower motor wires according to their corresponding air handler wiring diagram.
Reattach mid-cabinet support bracket, and then replace the blower access door and coil access door.

MOTOR SPEED SELECTION

Standard Air Handlers
The blower speed is preset at the factory for operation at the same speed for heating and cooling, by using the blower motor jumpering terminal on the blower motor and connecting it to the desired speed with both the red and black wires connected to the jumpering terminal. For optimum system performance and comfort, it may be necessary to change the factory set speed. To change the blower speed:

WARNING
To avoid the risk of electric shock, personal injury, or death, disconnect all electrical power to the unit before performing any maintenance or service. The unit may have more than one electrical power supply

Disconnect all electrical power to the unit and remove the upper door.
Remove the black and red wires from the blower motor jumping terminal.
Connect the heating speed wire (red) and the cooling speed wire (black) to the desired blower speed marked on the terminal block of the blower motor. If needed, re-use the motor jumping terminal.
IMPORTANT NOTE
After changing the blower speed setting, make sure to bundle and insulate any unused blower motor leads so that they will not make contact with the air handler cabinet or non-insulated live parts.
Standard 3 Speed Motors
- Terminal 4 = Hi speed
- Terminal 5 = Med speed
- Terminal 6 = Low speed
  For a Table of Minimum heating speeds, limit settings, and baffle usage, see Table 1 (page 10). Also see Clearances to Combustibles (page 4).
Replace the upper door and secure it to the unit.
Restore power to the unit.

Variable Speed Air Handlers
The minimum electric heat airflow is selected by setting switches on the air handler circuit board. Selecting the minimum electric heat airflow sets the minimum air flow that will be produced whenever electric heater kits are energized. When the electric heater kits are energized along with a heat pump, the airflow may be higher depending on the basic cooling/heat-pump airflow setting. Reference the installation instructions supplied with the air handler for additional airflow information.

FIGURES & TABLES

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $2$$ $National-Air-Warehouse-H8HK-D -Series-Electric-Heater-Kit- $3$$ $National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $4$$ $National-Air-Warehouse-H8HK-D -Series-Electric-Heater-Kit- $5$$ $National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $6$$

| Minimum Recommended Heating Blower Speed (Zero Clearance Install)
---|---
Air Handler Model| Blower Orientation| H8HK005K- 01D| H8HK005K- 11D| H8HK008K- 01D| H8HK008K- 11D| H8HK010K- 01D| H8HK010K- 11D| H8HK015K- 21D| H8HK020K- 21D
B64BMM(0,X) 18K-A| ALL| LOW| LOW| MED.| MED.| HIGH| HIGH| —| —
B64BMM(0,X) 24K-A| ALL| LOW| LOW| MED.| MED.| HIGH| HIGH| —| —

B64BMM(0,X) 24K-B

| Upflow/Downflow| LOW| LOW| MED.| MED.| MED.| MED.| HIGH| —
Horizontal Right/ Left| MED.| MED.| MED.| MED.| HIGH| HIGH| HIGH| —

B64BMM(0,X) 30K-B

| Upflow/Downflow| LOW| LOW| MED.| MED.| HIGH| HIGH| HIGH| —
Horizontal Right/ Left| LOW| LOW| MED.| MED.| MED.| MED.| HIGH| —
B64BMM(0,X) 36K-B| ALL| LOW| LOW| LOW| LOW| MED.| MED.| MED.| —
* B64BMM(0,X) 42K-C| Upflow/Downflow| LOW| LOW| LOW| LOW| MED.| MED.| HIGH| HIGH
Horizontal Right/ Left| LOW| LOW| LOW| LOW| MED.| MED.| HIGH| HIGH
** B64BMM(0,X) 48K-C| Upflow| LOW| LOW| LOW| LOW| LOW| LOW| MED.| MED.
Horizontal Right/ Left| LOW| LOW| MED.| MED.| HIGH| HIGH| LOW*| —
Downflow| LOW| LOW| LOW| LOW| MED.| MED.| HIGH| —

Included 25-Degree Air Baffle shall be installed in blower housing of air handler. Note: Dashes denote combinations that are not allowed.

Note: All B64 Air Handlers have 2 blower housing limits installed (130°F opening temperature), field-wired into the low voltage circuit of the H8HK*D heater kit.

Table 1. Minimum Recommended Heating Blower Speeds for B64BMM(0,X) Air Handlers

| Minimum Heating Airflows for Heater Kit Combination in CFM (m 3 /h)
---|---
Air Handler Model| Blower Orientation| H8HK005K- 01D| H8HK005K- 11D| H8HK008K- 01D| H8HK008K- 11D| H8HK010K- 01D| H8HK010K- 11D| H8HK015K- 21D| H8HK020K- 21D| H8HK024K- 31D
B64EMMX 24K-A| Upflow & Horizontal Right/Left| 765 (1300)| 765 (1300)| 1095 (1860)| 1095 (1860)| 1305 (2217)| 1305 (2217)| —| —| **** —
Downflow| 765

(1300)

| 765

(1300)

| 1060

(1801)

| 1060

(1801)

| 1195

(2030)

| 1195

(2030)

| —| —| —
**** B64EMMX 24K-B| Upflow/ Downflow| 540 (917)| 540 (917)| 835

(1419)

| 835

(1419)

| 995

(1691)

| 995

(1691)

| 1465

(2489)

| —| —
Horizontal Right/Left| 540 (917)| 540 (917)| 765

(1300)

| 765

(1300)

| 995

(1691)

| 995

(1691)

| 1315

(2234)

| ****

—

| ****

—

**** B64EMMX 30K-A| Upflow/ Downflow| 765

(1300)

| 765

(1300)

| 1060

(1801)

| 1060

(1801)

| 1265

(2149)

| 1265

(2149)

| —| —| **** —
Horizontal Right/Left| 650

(1104)

| 650

(1104)

| 975

(1657)

| 975

(1657)

| 1095

(1860)

| 1095

(1860)

| —| —|

—

**** B64EMMX 30K-B| Upflow/ Downflow| 695

(1181)

| 695

(1181)

| 920

(1563)

| 920

(1563)

| 1060

(1801)

| 1060

(1801)

| 1410

(2396)

| —| —
Horizontal Right/Left| 765

(1300)

| 765

(1300)

| 1210

(2056)

| 1210

(2056)

| 1410

(2396)

| 1410

(2396)

| 1410

(2396)

| —| —
B64EMMX 36K-B| ALL| 540 (917)| 540 (917)| 835

(1419)

| 835

(1419)

| 1060

(1801)

| 1060

(1801)

| 1460

(2481)

| —| —

B64EMMX 42K-B

| Upflow| 695

(1181)

| 695

(1181)

| 920

(1563)

| 920

(1563)

| 1060

(1801)

| 1060

(1801)

| 1410

(2396)

| —| —
Horizontal Right/Left| 540 (917)| 540 (917)| 765

(1300)

| 765

(1300)

| 995

(1691)

| 995

(1691)

| 1315

(2234)

| —| —
Downflow| 695

(1181)

| 695

(1181)

| 920

(1563)

| 920

(1563)

| 1060

(1801)

| 1060

(1801)

| 1410

(2396)

| —| —
B64EMMX 48K-C| ALL| 510 (866)| 510 (866)| 850

(1444)

| 850

(1444)

| 975

(1657)

| 975

(1657)

| 1465

(2489)

| 1800

(3058)

| 1800

(3058)

Notes

Airflow values above are measured at 0.30 in W.C. of static pressure to which the unit was tested.
Dashes denote combinations that are not allowed.
All B64 Air Handlers have 2 blower housing limits installed (130°F opening temperature), field-wired into the low voltage circuit of the H8HK*D heater kit.

Table 2. Minimum Recommended Heating Blower Speeds for B64EMMX Air Handlers

| Limit Switch Combinations for B64BMM(0,X) Air Handlers
---|---
Air Handler Model| Blower Orientation| H8HK005K- 01D| H8HK005K- 11D| H8HK008K- 01D| H8HK008K- 11D| H8HK010K- 01D| H8HK010K- 11D| H8HK015K- 21D| H8HK020K- 21D
B64BMM(0,X) 18K-A| ALL|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| —
B64BMM(0,X) 24K-A| ALL|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| —
B64BMM(0,X) 24K-B| ALL|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| ****

**** —

B64BMM(0,X) 30K-B| Upflow/Downflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| ****

—

B64BMM(0,X) 30K-B| Horizontal Right/ Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 2

| ****

**** —

B64BMM(0,X) 36K-B| ALL|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —
B64BMM(0,X) 42K-C| **** Upflow/Downflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 205F
BUL: 225F
arrow: 1

B64BMM(0,X) 42K-C| Horizontal Right|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F* BUL: 235F
arrow: 1

B64BMM(0,X) 42K-C| Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 205F*
BUL: 225F
arrow: 1

**** B64BMM(0,X) 48K-C| Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —
B64BMM(0,X) 48K-C| **** Downflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 205F
BUL: 225F
arrow: 1

| —
B64BMM(0,X) 48K-C| **** Horizontal Right|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —
B64BMM(0,X) 48K-C| **** Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| **** —

Included 25-Degree Air Baffle shall be installed in blower housing of air handler.
Any limit switch specified other than 190 requires a limit change.

Note : Airflow direction 1 and 2 label on the heater kit indicate which way the heater kit should be installed. See Figure 13 (page 15). Note: MAL = Main Air Limit, BUL = Back up limit
Note : Dashes denote combinations that are not allowed.
Note : All B64 Air Handlers have 2 blower housing limits installed (130°F opening temperature), field-wired into the low voltage circuit of the H8HK*D heater kit.

Table 3. Limit Switch Combinations for B64BMM(0,X) Air Handlers

| Limit Switch Opening Temperature(s) Required for Each Heater Kit Combination
---|---
Air Handler Model| Blower Orientation| H8HK005K- 01D| H8HK005K- 11D| H8HK008K- 01D| H8HK008K- 11D| H8HK010K- 01D| H8HK010K- 11D| H8HK015K- 21D| H8HK020K- 21D| H8HK024K- 31D
B64EMMX 24K-A| **** All|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| —| —
B64EMMX 24K-B| **** All|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| **** —
B64EMMX 30K-A| Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 205F
BUL: 225F
arrow: 2

MAL: 205F
BUL: 225F
arrow: 2

| —| **** —| **** —
B64EMMX 30K-A| Downflow/ Horizontal|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 2

MAL: 215F
BUL: 235F
arrow: 2

| —| —| —
B64EMMX 30K-B| Upflow/ Downflow/ Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| —
B64EMMX 30K-B| Horizontal Right|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 2

| **** —| —
B64EMMX 36K-B| **** All|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| —| —
B64EMMX 42K-B| All|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| **** —| —
B64EMMX 48K-C| Upflow/ Horizontal Right/ Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 2

B64EMMX 48K-C| Downflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

Notes

All B64 Air Handlers have 2 blower housing limits installed (130°F opening temperature), field wired into the low voltage circuit of the H8HK*D heater kit.
Dashes denote combinations that are not allowed.
Any limit specified other than 190°F requires a limit change.
Airflow direction 1 and 2 label on the heater kit indicate which way the heater kit should be installed. See Figure 13 (page 15). MAL = Main Air Limit, BUL = Back up limit

Table 4. Limit Switch Combinations for B64EMMX Air Handlers

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 2

MAL: 215F
BUL: 235F
arrow: 2

| —| —| —
B64VMMX 24K-A| Downflow/ Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

MAL: 215F
BUL: 235F
arrow: 1

| —| —| —
B64VMMX 24K-B| **** Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| **** —| **** —
B64VMMX 36K-B| Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

| **** —| —
B64VMMX 48K-C| **** Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 2

**** B64VMMX 48K-C| Downflow/ Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

B64VMMX 48K-C| Horizontal Right|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F*
BUL: 210F
arrow: 1

B64VMMX 60K-C| Upflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

B64VMMX 60K-C| Downflow|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 205F
BUL: 225F
arrow: 1

B64VMMX 60K-C| Horizontal Left|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

B64VMMX 60K-C| Horizontal Right|

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

MAL: 190F
BUL: 210F
arrow: 1

Notes

All B64 Air Handlers have 2 blower housing limits installed (130°F opening temperature), field wired into the low voltage circuit of the H8HK*D heater kit.
Dashes denote combinations that are not allowed.
Any limit specified other than 190°F requires a limit change.
Airflow direction 1 and 2 label on the heater kit indicate which way the heater kit should be installed. See Figure 13 (page 15). MAL = Main Air Limit, BUL = Back up limit

Table 5. Limit Switch Combinations for B64VMMX Air Handlers

National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit-
01

| ELECTRICAL                       RATINGS                       FOR B64BMM(X,0)                      AIR HAN
---|---
VOLTAGE:                       208V| VOLTAGE: 230V
MINIMUM                       CIRCUIT (MCA)| MAX AMPACITY OVER-CURRENT (MOP)| MINPIRMOUTMECTION                   CIRCUIT (MCA)| MAX AMPACITY OVER-CURRENT (MOP)

Cabinet

| Capacity (×1000 BTU’s)| Model Number H8HK-| **CIRCUIT A| ****CIRCUIT B| ****CIRCUIT C| ****SINGLE CIRCUIT| ****CIRCUIT A| ****CIRCUIT B| ****CIRCUIT C| ****SINGLE CIRCUIT| ****CIRCUIT A| ****CIRCUIT B| ****CIRCUIT C| ****SINGLE CIRCUIT| ****CIRCUIT A| ****CIRCUIT B| ****CIRCUIT C| ****SINGLE CIRCUIT
****A| ****18| None| 1.6| –| –| 1.6| 15| –| –| 15| 1.6| –| –| 1.6| 15| –| –| 15
005K-XX| 23.3| –| –| 23.3| 25| –| –| 25| 25.6| –| –| 25.6| 30| –| –| 30
008K-XX| 35.9| –| –| 35.9| 40| –| –| 40| 39.6| –| –| 39.6| 40| –| –| 40
010K-XX**| 44.9| –| –| 44.9| 45| –| –| 45| 49.5| –| –| 49.5| 50| –| –| 50

| ****

| None| 3.1| –| –| 3.1| 15| –| –| 15| 3.1| –| –| 3.1| 15| –| –| 15
005K-XX| 24.8| –| –| 24.8| 25| –| –| 25| 27.1| –| –| 27.1| 30| –| –| 30
008K-XX| 37.4| –| –| 37.4| 40| –| –| 40| 41.1| –| –| 41.1| 45| –| –| 45
010K-XX| 46.4| –| –| 46.4| 50| –| –| 50| 51.0| –| –| 51.0| 60| –| –| 60

| ****

| None| 2.6| –| –| 2.6| 15| –| –| 15| 2.6| –| –| 2.6| 15| –| –| 15
005K-XX| 24.3| –| –| 24.3| 25| –| –| 25| 26.6| –| –| 26.6| 30| –| –| 30
008K-XX| 36.9| –| –| 36.9| 40| –| –| 40| 40.6| –| –| 40.6| 45| –| –| 45
010K-XX| 45.9| –| –| 45.9| 50| –| –| 50| 50.5| –| –| 50.5| 60| –| –| 60
015K-XX| 43.3| 24.3| –| 67.5| 45| 25| –| 70| 47.9| 26.6| –| 74.5| 50| 30| –| 80

| ****

| None| 5.4| –| –| 5.4| 15| –| –| 15| 5.4| –| –| 5.4| 15| –| –| 15
005K-XX| 27.0| –| –| 27.0| 30| –| –| 30| 29.3| –| –| 29.3| 30| –| –| 30
008K-XX| 39.6| –| –| 39.6| 40| –| –| 40| 43.3| –| –| 43.3| 45| –| –| 45
010K-XX| 48.6| –| –| 48.6| 50| –| –| 50| 53.3| –| –| 53.3| 60| –| –| 60
015K-XX| 43.3| 27.0| –| 70.3| 45| 30| –| 80| 47.9| 29.3| –| 77.3| 50| 30| –| 80
020K-XX| 43.3| 48.6| –| 91.9| 45| 50| –| 100| 47.9| 53.3| –| 101.2| 50| 60| –| 110

| ****

Note: H8HK0K-D heater kits may be used with B64 Air Handlers in accordance to the corresponding “Limit Switch Combinations” and “Minimum Recommended Heating Blower Speeds” tables OR as direct replacements into the B6(B,E,V) air handlers.

Table 6. Electrical Ratings for B64BMM(X,0) Air Handlers

| ELECTRICAL RATINGS FOR B64EMMX AIR HANDLERS
---|---
VOLTAGE:| 208V| VOLTAGE:| 230V
B64EMMX| AIR| HA M N INDILM| E U R M S (MCA) **CIRCUIT| A M M A P X ACIT| Y OVER-CURRENT (MOP)| PR O M T INEIC| M T U IOMN CIRCUIT (MCA)| A M M A P X ACIT| Y OVER-CURRENT (MOP)
****Cabinet| Capacity (×1000 BTU’s)| ****Model**

H8HK-

CIRCUIT B

| ****

CIRCUIT C

| ****

SINGLE CIRCUIT

| ****

| None| 4.8| –| –| 4.8| 15| –| –| 15| 4.8| –| –| 4.8| 15| –| –| 15
005K-XX| 26.4| –| –| 26.4| 30| –| –| 30| 28.7| –| –| 28.7| 30| –| –| 30
008K-XX| 39.0| –| –| 39.0| 40| –| –| 40| 42.7| –| –| 42.7| 45| –| –| 45
010K-XX| 48.0| –| –| 48.0| 50| –| –| 50| 52.7| –| –| 52.7| 60| –| –| 60

| ****

| None| 8.8| –| –| 8.8| 15| –| –| 15| 8.8| –| –| 8.8| 15| –| –| 15
005K-XX| 30.4| –| –| 30.4| 35| –| –| 35| 32.7| –| –| 32.7| 35| –| –| 35
008K-XX| 43.0| –| –| 43.0| 45| –| –| 45| 46.7| –| –| 46.7| 50| –| –| 50
010K-XX| 52.0| –| –| 52.0| 60| –| –| 60| 56.7| –| –| 56.7| 60| –| –| 60
015K-XX| 43.3| 30.4| –| 73.7| 45| 35| –| 80| 47.9| 32.7| –| 80.6| 50| 35| –| 90
020K-XX| 43.3| 52.0| –| 95.3| 45| 60| –| 100| 47.9| 56.7| –| 104.6| 50| 60| –| 110
024K-XX| 43.3| 43.3| 30.4| 116.9| 45| 45| 35| 125| 47.9| 47.9| 32.7| 128.5| 50| 50| 35| 150

Table 7. Electrical Ratings for B64EMMX Air Handlers

| ELECTRICAL RATINGS FOR B64VMMX AIR HANDLERS
---|---
VOLTAGE: 208V| VOLTAGE: 230V
B64VMMX AIR HANDLER| MINIMUM CIRCUIT AMPACITY (MCA)| MAX OVER- CURRENT PROTECTION (MOP)| MINIMUM CIRCUIT AMPACITY (MCA)| MAX OVER- CURRENT PROTECTION (MOP)

Cabinet

| ****

| None| 6.8| –| –| 6.8| 15| –| –| 15| 6.8| –| –| 6.8| 15| –| –| 15
005K-XX| 28.4| –| –| 28.4| 30| –| –| 30| 30.7| –| –| 30.7| 35| –| –| 35
008K-XX| 41.0| –| –| 41.0| 45| –| –| 45| 44.7| –| –| 44.7| 45| –| –| 45
010K-XX| 50.0| –| –| 50.0| 60| –| –| 60| 54.7| –| –| 54.7| 60| –| –| 60
015K-XX| 43.3| 28.4| –| 71.7| 45| 30| –| 80| 47.9| 30.7| –| 78.6| 50| 35| –| 80
020K-XX| 43.3| 50.0| –| 93.3| 45| 60| –| 100| 47.9| 54.7| –| 102.6| 50| 60| –| 110
024K-XX| 43.3| 43.3| 28.4| 114.9| 45| 45| 30| 125| 47.9| 47.9| 30.7| 126.5| 50| 50| 35| 150

| ****

Table 8. Electrical Ratings for B64VMMX Air Handlers

WIRING DIAGRAM

H8HK005K-01D (with circuit breaker) H8HK005K-11D (without circuit breaker) 5 kW, 208/230 V~, 60Hz, 1-Phase Electric Heater Kit

NOTES

If any of the original wire supplied with this unit must be replaced, it must be replaced with wiring material of the same gauge size and temperature rating.
The installation of this heater kit may require a change in the blower speed tap connection. See Installation Instructions for details.
Use copper conductors with a minimum temperature rating of 60°C for supply connections.

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $7$$

Figure 14. Single Phase, 5 kW Wiring Diagram (Air Handler with Circuit Breaker(s))

8kW, 10kW, 208/230 V~, 60Hz, 1-Phase Electric Heater Kit

H8HK008K-01D (without circuit breaker)
H8HK008K-11D (with circuit breaker)
H8HK010K-11D (with circuit breaker)
H8HK010K-01D (without circuit breaker)

If any of the original wire supplied with this unit must be replaced, it must be replaced with wiring material of the same gauge size and temperature rating.
The installation of this heater kit may require a change in the blower speed tap connection. See Installation Instructions for details.
Use copper conductors with a minimum temperature rating of 60°C for supply connections.

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $8$$

Figure 15. Single Phase, 8 kW and 10 kW Wiring Diagram (Air Handler with Circuit Breaker(s))

H8HK015K-21D (with circuit breaker)
15kW, 208/230 V~, 60Hz, 1-Phase Electric Heater Kit

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $9$$

NOTES

If any of the original wire supplied with this unit must be replaced, it must be replaced with wiring material of the same gauge size and tempera-ture rating.
The installation of this heater kit may require a change in the blower speed tap connection. See Installation Instructions for details.
Use copper conductors with a minimum temperature rating of 60°C for supply connections.

LEGEND

FIELD WIRING
LOW VOLTAGE
HIGH VOLTAGE

Figure 16. Single Phase, 15 kW Wiring Diagram (Air Handler with Circuit Breaker(s))

H8HK020K-21D (with circuit breaker)
20 kW, 208/230 V~, 60Hz, 1-Phase Electric Heater Kit

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $10$$

Figure 17. Single Phase, 20 kW Wiring Diagram (Air Handler with Circuit Breaker(s))

H8HK024K-31D (with circuit breaker)
24kW, 208/230 V~, 60Hz, 1-Phase Electric Heater Kit

$National-Air-Warehouse-H8HK-D-Series-Electric-Heater-Kit- $11$$

NOTES

If any of the original wire supplied with this unit must be replaced, it must be replaced with wiring material of the same gauge size and temperature rating.
The installation of this heater kit may require a change in the blower speed tap connection. See Installation Instructions for details.
For supply connections use copper conductors only.

INSTALLER: PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE

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National Air Warehouse H8HK-D Series Electric Heater Kit

Product Information

H8HK-D SERIES ELECTRIC HEATER KIT

INSTALLATION IN STANDARD & VARIABLE SPEED INDOOR AIR HANDLERS

GENERAL INFORMATION

Clearances to Combustibles

INSTRUCTIONS FOR SWAPPING LIMITS

MOTOR SPEED SELECTION

WIRING DIAGRAM

INSTALLER: PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE

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