Install Manual

04/03/2009 1 EI204
Product Configurator
EH-*** - *
U = Upflow
D = Downflow
kW Width
10 = 10 kW 8 = 18”
15 = 15 kW 5 = 15”
20 = 20 kW
25 = 25 kW
Introduction
The Power of Choice is encouraging many homeowners to build versatility and flexibility into their heating
system. When used and controlled properly, electric heat can save hundreds of dollars per year. To meet this
Power of Choice need, this HeatChoice series plenum heater is very versatile with a variety of applications.
This HeatChoice unit contains several patented mechanical, airflow, and electrical control features. The intent of
these features is to reduce installation labor and add quality performance. Since these patented features cause this
unit to be unique compared to other electric heating products, this installation manual must be studied and followed
in detail.
This is a pre-wired package for converting a new or existing oil, gas, or solid fuel furnace to a dual heat or total
electric heating system. This is a complete package for standard air conditioning, utility load control, and
optional DC drive variable speed furnace. There are no additional relays or option hardware needed for the
outlined application. Also there will be no feedback to the air conditioning compressor unit with mechanical
stat sub-base or digital room thermostats.
The utility load control receiver properly switches the heating mode and properly controls the air conditioning
unit during summer heat load interrupt. The blower circuit and control is also designed for heating interrupt
(blower handled by gas furnace only) and continuous operating blower during cooling peak load interrupt.
Typically these controls and design features are only found in this product or its US made equivalents.
The kWh capacity should match the heat requirement of the house or building. Do not oversize your installation,
sizing should be slightly smaller than the maximum requirement of the coldest day of the year. This unit can and is
designed for continuous run operation on the coldest day of the year. Undersizing is possible, see a special section
using SOT transfer timeout.
Please read and understand conditions associated with proper installation, unauthorized changes, and POWER ON
procedures.
For information, all units are rated at 240VAC. When operating at lower source voltage, the output will be
reduced.
Example: 20 kW unit, assuming normal element tolerances
220VAC source - 16.8 kW, 76.4 amps
208VAC source - 15.1 kW, 72.3 amps
Warranty Statement
See the last page of this manual for detailed limited warranty coverage explanation.