National Comfort Products NCPAH Series User manual

National Comfort Products®
A Division of National Refrigeration & Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020 • [phone] • 1-800-523-7138 • Fax: [phone]
HEATING & A/C EQUIPMENT
NATIONAL
COMFORT
PRODUCTS
®
Heating Comfort for Multi-Family Construction
This unit is designed to
be installed with
Please read the entire installation guide
before starting the installation.
All phases of this installation must comply
with National, State and Local codes.
Electric Heat Kit for use in
P-Series Air Handler
Installation Guide NCPAH
Series:
24-P
36-P

Electric Heat Kit Installation Instructions
3
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause injury or property
damage. For assistance or additional information, consult a qualified installer or service agency.
WARNING
Installation and servicing of air conditioning
equipment can be hazardous due to internal
refrigerant pressure and live electrical
components. Only trained and qualified
service personnel should install or service
this equipment. Installation and service
performed by unqualified persons can result
in property damage, personal injury, or
death.
WARNING
If this unit is to be installed in a mobile or
manufactured home application, the
ductwork must be sized to achieve static
pressures within the manufacturer's
guidelines. All other installation guidelines
must also be followed. Failure to do so may
result in equipment damage, personal injury,
and improper performance of the unit.
WARNING
Sharp metal edges can cause injury. When
installing the unit, use care to avoid sharp
edges.
WARNING
If these instructions and/or codes are not
followed or if the equipment is not properly
installed, possible injury or death could
occur during installation or operation.
CAUTION
The installation of this appliance must conform to the requirements of the National Fire Protection
Association; the National Electrical Code, ANSI/NFPA No.70 (latest edition) in the United States;
the Canadian Electrical Code Part 1, CSA 22.1 (latest edition) in Canada; and any state or
provincial laws or local ordinances. Local authorities having jurisdiction should be consulted before
installation is made. Such applicable regulations or requirements take precedence over the general
instructions in this manual.
These instructions are intended as a general guide only, for
use by qualified personnel and do not supersede any
national or local codes in any way. Installation must conform
with the local building codes and with the latest editions of
the National Electrical Code.
Read these instructions thoroughly before starting
installation. Only qualified installers or technicians should
install the electric heat section and all other equipment used
in HVAC systems. Federal, state, and local codes must be
followed when installing this oranyotherHVACequipment.
Be sure to disconnect all power to the unit
while installing and servicing this equipment.
Turn off accessory heater power switch if
applicable. Be mindful that there may be more
than one disconnect servicing this equipment.
Use proper tools and protective equipment
during installation and service.TAG
Disconnect switch(es) with a suitable
WARNING LABEL.
WARNING
Models: EHK3-05B, EHK3-08B, EHK3-10B
Save these instructions for future reference

Electric Heat Kit Installation Instructions
4
Inpection of Shipment
Before proceeding with the heater installation,
inspect thoroughly for shipping damage. Notify the
shipper immediately if any damage is found. Check
all ceramic insulators for breakage and inspect
heater element wire to see thatnone have been
deformed. Clean all dirt, dust and moisture from
equipment. Check for proper clearances of live
parts, between phases, and toground. Make sure
that all required barriers are in place. Check
conductors run in multiple to ensure that they are
properly wired. Refer to base installation
instructions for complete unit installation details.
WARNING
- When installing in a garage, the elements
must be at least 18" above the floor.
- If this appliance is installed in an enclosed
area such as a garage or utility room with
any carbon monoxide (CO) producing
appliance (i.e. Automobile, Furnace,
Water-Heater etc.), ensure the area is
properly ventilated.
- A means of strain relief and conductor
protection must be provided at the supply
wire entrance.
Attention Installing Personnel
As a professional installer, you have an obligation
to know the product better thanthecustomer.This
includes all safety precautions and related items.
Prior to actual installation, thoroughly familiarize
yourself with the Instruction Manual. Pay close
attention to all safety warnings. Often during
installation or repair, itis possible to place yourself
in a position which is more hazardous than when
the unit is in operation.
Remember, it is Your responsibility to install the
product safely and to know it well enough to be able
to instruct a customer on its safe use.
Safety is a matter of thinking before acting. Most
dealers have a list of specific good safety practices
... follow them.
The precautions listed in this installation manualare
intended as supplemental to existing practices.
However, if there is a direct conflict between
existing practices and the content of this manual,
the precautions listed here are to take precedence.
WARNING
Reminder: If these instructions and/or
codes are not followed or if the equipment
is not properly installed, possible injury or
death could occur during installation or
operation.
Carbon Monoxide Poisoning Hazard
DANGER
PELIGRO
Carbon monoxide producing devices (such
as automobile, space heater, gas water
heater, etc.) should not be operated in
enclosed areas such as unventilated
garages, utility rooms or parking areas
because of the danger of carbon monoxide
(CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is
installed in an enclosed area such as a
garage, utility room or parking area and a
carbon monoxide producing device is
operated therein, there must be adequate,
direct outside ventilation.
This ventilation is necessary to avoid the
danger of CO poisoning which can occur if a
carbon monoxide producing device
continues to operate in the enclosed area.
Carbon monoxide emissions can be
(re)circulated throughout the structure if the
furnace or air handler is operating in any
mode.
CO can cause serious illness including
permanent brain damage or death.
Special Warning for Installation of Furnaces
or Air Handling Units in Enclosed Areas
such as Garages, Utility Rooms or Parking
Areas.

Electric Heat Kit Installation Instructions
5
NOTE: If physical damage is observed during the
inspection DO NOT install this kit.
Before installing the unit, check the information on
the unit rating plate to ensurethat the unit meets
the job specification, proper electrical poweris
available, and the proper duct clearances are
maintained.
Refer to base unit installation instructions as
required.
Reminder: The power must be in the OFF position.
There may also be more than one means of
disconnect servicing this product.
Electric Heater Kit Installation
WARNING
HIGH VOLTAGE
Risk of electrical shock.
Before installing or servicing
unit, be sure ALL power to
the units is OFF. More than
one disconnect switch may be
present. Failure to disconnect
power supplies can result in
property damage, personal
injury, or death.
CAUTION
To avoid possible personal injury, use
extreme caution if using power tools to
remove the small breaker mounting
brackets. The brackets may quickly rotate
and cause injury.
This electric heater kit is designed to provide power
directly to the unit from the electric heater kit's
power supply eliminating the need for additional
circuits. The power and control wiring use a single
polarized plug to connect the heater and the unit.
Introduction 2.) Remove the screws that attach the control box to the fan coil,
and take the control box off of the fancoil.Leave the blower
motor wires attached. (See Fig. 1)
3.) Remove the heater opening cover plate and retain the screws
for the heater kit installation.
4.) Align the heater assembly controls withtheopening in the fan
coil control box and secure in place with the previously
removed screws from step 3. (See Fig. 1)
5.) Insert the assembled heater and control box into the
blower-compartment opening, taking care notto damage the
coils.
6.) Secure the control box back to the fan coil using the previously
removed screws from step 1.
7.) Attach the 6-wire harness connector on the fan coil to the
mating 6-wire harness connector on the heater assembly.
8.) Use the two wire nuts provided with the heat kit to attach the
Red & Black wires on the fan coil pigtail to the Red & Black
wire of the heater kit pigtail.BE SURE TOATTACH LIKE
COLORS.
9.) Ground heater per NEC&local codes.
10.) Make sure all wires are routed away from and protected from
sharp edges.
11.) Place heat kit wiring diagram in appropriate area on unit
wiring diagram.
12.) Replace the control box cover and check for proper operation.
NOTE: Verify minimum CFM / Fan Speed requirements from
Table 1.
1.) Remove the control box cover.

6
Electric Heat Kit Installation Instructions
FIG. 1
Electric Heat Kit P Series MCA/MOP Data
Table 1
Heat Kit
Model
Air Handler
Model (kW) Electric Heat MIN Circuit Ampacity MAX Fuse or Breaker
(HACR) Ampacity
208 240 208 240
EHK3-05B
24
5.0 23.9 27.3 25 30
EHK3-08B 7.5 35.1 40.4 40 45
EHK3-10B 10 44.6 51.3 45 60
EHK3-05B
36
5 24.9 28.3 25 30
EHK3-08B 7.5 36.1 41.4 40 45
EHK3-10B 10 45.6 52.3 50 60
Fan Coil Unit Size - Mimimum CFM* Fan Coil Unit Size - Mimimum CFM*
Electric Heater Part Number Units Sizes Used With kW 18 24 30 36
EHK3-05B 24-36 5 325 450 575 700
EHK3-08B 24-36 7.5 350 475 600 725
EHK3-10B 24-36 10 375 500 625 750
* - Simultaneous electric heat and heat pump operation may require higher cfm or fan speed if applicable.

7

National Comfort Products
539 Dunksferry Road |Bensalem, PA 19020-5908
[phone]
Fax [phone]
HEATING & A/C EQUIPMENT
NATIONAL
COMFORT
PRODUCTS
®
IM Electric Heat Kit for P Series Air Handler 09/2018