482 01 2231 02 4/27/15
Specifications are subject to change without notice
INSTALLATION INSTRUCTIONS
ELECTRIC HEAT ACCESSORY
EHC09AKCN, EHC15AKF, EHC15AKB, EHC20AKF, EHC20AKB,
EHC25AHCF, EHC30AHCF
DANGER, WARNING, CAUTION, and NOTE
The signal words
DANGER, WARNING, CAUTION,
and
NOTE
are used to identify levels of hazard seriousness. The signal
word
DANGER
is only used on product labels to signify an im-
mediate hazard. The signal words
WARNING,
CAUTION,
and
NOTE
will be used on product labels and throughout this manual
and other manuals that may apply to the product.
DANGER
−
Immediate hazards which
will
result in severe per-
sonal injury or death.
WARNING
−
Hazards or unsafe practices which
could
result in
severe personal injury or death.
CAUTION
−
Hazards or unsafe practices which
may
result in
minor personal injury or product or property damage.
NOTE
−
Used to highlight suggestions which
will
result in en-
hanced installation, reliability, or operation.
Signal Words in Manuals
The signal word
WARNING
is used throughout this manu-
al in the following manner:
The signal word
CAUTION
is used throughout this manu-
al in the following manner:
Signal Words on Product Labeling
Signal words are used in combination with colors and/or
pictures on product labels.
WARNING
Safety Labeling and Signal Words
!
CAUTION
WARNING
!
ELECTRICAL SHOCK HAZARD.
Failure to follow this warning could result in
death and/or personal injury.
Installation or repairs made by unqualified persons
can result in hazards to you and others. Installation
must conform with local building codes or, in the
absence of local codes, with National Electrical Code
ANSI/NFPA 70
−
1996 or current edition.
The information contained in this manual is intended
for use by a qualified service technician familiar with
safety procedures and equipped with the proper
tools and test instruments.
Shut OFF electric power at unit disconnect and/or
service panel before beginning the following proce-
dures.
!
WARNING
USE
EHC heater kits are designed for use with the Observer
t
Communicating Wall Control and FCM4X communicating fan coil.
When used with the Observer communicating system the electric
heater will be automatically recognized and the airflow will be
configured automatically.
INSTALLATION
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.
UNIT DAMAGE HAZARD.
Failure to follow this caution may result in property
damage.
Before installation of heater, the black and yellow
pigtail leads must be removed from the fan coil board
or wire harness to prevent possible damage to the
product. Electrical power will be provided to the
board through the heater circuit plug.
!
CAUTION
3. Disconnect 2 power wires (black and yellow pigtail leads) from
fan control board or wire harness (if applicable) and discard.
Wires may be part of a plug assembly or attached to terminals
L1 and L2. Remove cooling control plate from fan coil (if
equipped). For 24kW, and 30kW heaters, remove adapter plate.
(See Figure 1)
4. Insert heater assembly into front of fan coil so that element rods
engage holes in rear heat shield.
5. Attach heater control plate to fan coil using 2 screws provided.
For 24kW, and 30kW heater models, attach front of heater to fan
deck using third screw. (See Figure 1)
