Lennox EvenHeater ECB29EH Installation Instructions Manual

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The EvenHeater'" ECB29EH electric heat sections pro-
vide field installed staged electric heat for Lennox Elite 10"
CB29M, Elite 12" CB30M, Elite 12" CB30U, and Power-
Mate" CB31MV blower coil units.
In heat pump applications, the electric heat is staged to
provide supplemental heat to meet desired comfort levels.
When the electric heat section is used in applications that
do not have a heat pump, the elements are staged to limit
heat so that it meets heating demands only.
Adjust element staging by changing the location of the
supply air temperature-selection jumper on the ECH1
control board.
ECB29EH heat sections are available in single-phase
9kW, 12.5 kW, 15 kW, and 20kW sizes. Heaters are
equipped with circuit breakers. Refer to the engineering
handbook for specific heat section applications.
INSTALLATION
INSTRUCTIONS
EVENHEATER
TM
ELECTRIC
HEAT SECTIONS
ELECTRIC HEAT SECTIONS F_-_ Technical
503,675M _'LLL. Publications
5/99
Supersedes 7/97 Lithe U.S.A.
ECB29EH Electric Heat Sections ................. 1
Shipping & Packing List ......................... 1
General Information ............................ 1
Heat Section Installation ........................ 2
Circuit Breaker Installation ....................... 2
Thermistor Installation .......................... 4
EHCl Control Board Installation .................. 4
Electrical Connections .......................... 5
Blower Speed Connections ...................... 6
Discharge Air Temperature Adjustment ............ 6
Unit Start-Up .................................. 6
Troubleshooting ................................ 6
Wiring Diagrams ............................... 7
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation. Read these instruc-
tions thoroughly before installing the heater section.
The electric heat section and all other equipment used in
HVAC systems must only be installed by qualified installers
or technicians. You must follow federal, state, and local
codes while installing this or any other HVAC equipment.
,& WARNING
Package 1 of 1 contains:
1 - Assembled electric heat section
1 - Bag assembly containing the following:
10-Screws; 1-Wiring diagram; 2-Wire nuts
1 - EHC1 control board assembly
1 - Supply air plenum thermistor
2 - Adhesive-backed foam seals
1 - Control bracket
Inspect the heater section for shipping damage. If you find
any damage, immediately contact the last carrier.
Be sure to disconnect all power to unit while installing and
servicing the equipment. Use proper tools and protective
equipment during installation and service.
Installation of Lennox blower sections with or without op-
tional electric heat must conform with standards in the Na-
tional Fire Protection Association (NFPA) "Standard for
Installation of Air Conditioning and Ventilation Systems
NFPA No. 90A," and "Standard for Installation of Resident
Type Warm Air Heating and Air Conditioning System, No.
90B," manufacturer's installation instructions, and local
municipal building codes.
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