ICP EHIA05KB10, EHIA07KB10, EHIA10HB10, EHIA10KB10, EHIA15HB10 Installation Guide

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SAFETY CONSIDERATIONS

Improper installation adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock,

or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency,

or your distributor or branch for information or assistance. The qualified installer or agency must use factory--authorized kits or

accessories when modifying this product Refer to the individual

instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing

operations. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit. Consult local building codes, the current editions of the National Electrical

Code (NEC) NFPA 70. In Canada refer to the current editions of

the Canadian Electrical Code CSA C22.1

Recognize safety information. This is the safety-alert symbol

/_. When you see this symbol on the furnace and in

instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, CAUTION and NOTE. The words DANGER, WARNING, and

CAUTION are used with the safety alert symbol. DANGER identifies the most serious hazards which will result in severe

personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to

identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced installation, reliability, or operation.

Introduction

The EHIA electric heaters are designed specifically for the follow-

ing revised Modular Blower units with a sales code and series change of B1 & Cl. The Modular units have been updated with

new electronic fan control boards.

208/230v PSC Blower 208/230v Variable-Speed Blower

MF08B1500B1 MV08B1500B1 MF12F1900B1 MV12F1900B1 MF16J2200B1 MY16J2200B1 MF20L2400B1 MV20L2400B1

208/230v PSC Blower 208/230v Variable-Speed Blower

MF08001401 MY08001401 MF12001701 MY12001701 MF160021 C1 MY160021 C1

MF20002401 MV20002401

iii

PERSONAL INJURY, AND/OR PROPERTY DAMAGE HAZARD

Failure to carefully read and follow this warning could result in equipment malfunction, property damage, personal injury and/or death.

Installation or repairs made by unqualified persons could result

in equipment malfunction, property damage, personal injury and/or death.

The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures

and equipped with proper tools and test instruments.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit. Consult local building codes, the current editions of the National Electrical

Code (NEC) NFPA 70. In Canada refer to the current editions of the Canadian Electrical Code CSA O22.1

Accessory Heater Usage

Used With

Model Description MF & MV

EHIA05KB10 5 kW Single-Phase w/C.B. 08, 12, 16, 20 EHIA05KNt0 5 kW Single-Phase w/T.B. 08, 12, 16, 20 EHIA07KB10 7.5 kW Single-Phase w/C.B. 08, 12, 16, 20 EHIA07KNt0 7.5 kW Single-Phase w/T.B. 08, 12, 16, 20 EHIA10KB10 10 kW Single-Phase w/C.B. 08, 12, 16, 20 EHIA10KNt0 10 kW Single-Phase w/T.B. 08, 12, 16, 20 EHIA15KB10 15 kW Single-Phase w/C.B. 08, 12, 16, 20 EHIA20KB10 20 kW Single-Phase w/C.B. 12, 16, 20 EHIA25KB10 25 kW Single-Phase w/C.B. 16, 20

EHIA10HB10 10 kW 3-Phase w/C.B. 12, 16, 20 EHIA15HB10 15 kW 3-Phase w/C.B. 12, 16, 20 EHIA20HB10 20 kW 3-Phase w/C.B. 16, 20 EHIA25HB10 25 kW 3-Phase w/C.B. 16, 20

KB= single-phase C.B. = circuit breaker

KN =single-phase T.B.= terminal block

HB =three-phase

NOTE: EHIA electric heaters are not backwards compatible with

any of the previous MF or MV models prior to B1.

NOTE: Supply voltage, amperage, fuse and disconnect switch

sizes MUST conform with all technical specifications in this manu- al and on the unit rating plate.

Adapter and filler plates are shipped with the indoor units to be

used with electric heat as needed depending on unit size and heater size.

451 01 4109 O0April 2012

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position and

install a lockout tag. There may be more than one electrical supply to the furnace. Check accessories and cooling unit for additional electrical supplies that must be shut off during furnace servicing. Lockout and tag switch with a suitable warning label. Verify proper operation after servicing.

1. Shut OFF electric power at unit disconnect switch or ser- vice panel.

CUT HAZARD Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate clothing, safety glasses and gloves when

handling parts and servicing furnaces.

Remove the front panel from unit and locate adapter and fill- er plates, with screws inside package.

Attach adapter plate and filler plate to heater if required to match opening in cabinet.

Right Hand Airflow Application Only/Heaters with CB.

If indoor section is going to be used for right hand airflow,

the circuit breakers will have to be removed and rotated

180°, so the OFF position will be DOWN when the cabinet is positioned on the right side. This isan NEC requirement.

DO ONE SET OF BREAKERS AT A TIME to make sure wires are reconnected properly, Loosen terminal screws

on the wires and gently pull wires back from breaker. Re- move screws securing breaker and rotate 180°,then recon- nect wires to breaker. Proper torque for terminal screws is 35 inch pounds.

Insert the heater into the cabinet opening as shown in Figure 1, so the heater support rod goes into the hole in back of the cabinet. Exercise caution to prevent tearing of insulation or damage to heater element,

Secure the electric heat accessory with four screws.

Connect the 9-pin heater wiring harness to receptacle loc- ated inside cabinet. A perfect match and positive connec-

tion must be made between the plug and receptacle. The

plug will interlock with receptacle when properly seated. Harness contains both 24V and high-voltage wiring. Blower power is provided through heater harness.

Install front door panel. NOTE: If the heater has circuit breakers, remove the appropriate knockout(s) in the door panel to match circuit breaker location. Clean the perimeter area around the opening. If greasy or highly soiled use alco-

hol to clean the area.

Circuit Breakers Models only: Remove backing from the circuit breaker cover seal and align it with the embossed

area so it covers the circuit breakers. Press firmly around the edges so itseals properly. Seal helps to minimize mois- ture infiltration which can affect electronic components.

10. Mark an "X" in the appropriate box for the heater on the in- door unit rating plate.

Figure 1Jl Installing The Electric Heat

Heater Support RodFits into Hole

Filler Plate

Adapter Plate \

Rotate Circuit

Breakers 1800

for RHAirflow \

• \\

Knockouts

For Circuit

Breakers

Representative drawin,q only, some models may vary in appearance.

Accessory

Transparent seal/cover for

Circuit Breakers.

Clean sheet metal surface around breaker door knock-

outs before applying.

2 451 01 4109 00

Wiring

All line voltage connections and ground connections MUST be

made with copper wire.

The power supply wiring MUST have overcurrent protection. This

can be either fuses or circuit breakers. The maximum size for the overcurrent protection is shown in the column labeled "Max. Fuse

or NEC HACR Breaker (Amps)" inthe Electrical Data Table or on

the unit rating plate.

Connect supply voltage wires to the Circuit Breakers on the heater or to the terminal block on the heater. Power for the blower motor is

supplied through the connector from the heater to the control

board.

Grounding

Permanently ground the electric heat accessory in accordance

with local codes and ordinances and in the United States with Na- tional Electrical Code ANSI/NFPA70-2011 or current edition. Use

a copper conductor of the appropriate size from the electric heat accessory ground lug, to a grounding lug on the circuit breaker

panel. On models with more than one circuit, a separate copper ground wire MUST be connected for each circuit.

ELECTRICAL SHOCK HAZARD

Failure follow this warning could result in personal injury or death.

The unit cabinet must have an uninterrupted or unbroken

ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical sire

or metal conduit when installed in accordance with existing electrical codes.

Heater Staging

The electric heater elements and modular blower controls are factory circuited for single-stage electric heat operation. Refer to

Electric Heat Staging Table A-1 for all available heaters. On larger heaters the electric heat can be staged (1st & 2nd and/or 3 rd) via

the indoor wall thermostat, or by using an accessory ODTS (out-

door thermostat temperature switch). Controlled heater staging may satisfy requirements imposed by some electric utilities. Re-

fer to Table A-2 for two-stage capable heaters and Table A-3 for three-stage capable heaters. Refer to the indoor modular install-

Table A Electric Heat Staging

A-1

Single-Stage Operation (no staging,

all electric heat together)

EHIA05KB / KN EHIA07KB / KN

Single-Phase

Three-Phase

NOTE: KB is single-phase with circuit breaker.

KN is single-phase with terminal block (non-breaker). HB is three-phase with circuit breaker.

EHIA10KB / KN

EHIA15KB EHIA20KB EHIA25KB

EHIAIOHB EHIA15HB

EHIA20HB EHIA25HB

ation instructions for suggested low-voltage control wiring regard-

ing staging.

Rectifier and Time Delay Boards

Each heater element is controlled by a relay mounted on the heat- er panel. The relay has a 24V DO coil. Each relay has a small recti-

fier board attached directly to the relay coil terminals. The rectifier

board converts incoming 24V AC control signal to DC. Some heaters may have up to three relays. Both the second and third

(relay) rectifier boards have a built-in R2 jumper time-delay fea- ture. When the jumper is uncut, the time delay allows the second stage heat to be energized approximately five (5) seconds after the first stage. On 20kW and 25kW heaters models (table A-3), the third-stage relay R2 jumper is factory cut. This provides an

eight (8) second delay after first stage relay closes.

Air Flow

Air flow requirements are different between MF and MV. Refer to

MF and MV Installation Instructions for airflow set-up information.

Temperature Rise Check

Temperature rise is the difference between the supply and return air temperatures.

NOTE: The temperature rise can be adjusted by changing the

heating speed tap at the unit's blower terminal block. Refer to the

unit's Installation Instructions for airflow information. A temperature rise greater than 60°F (33.300) is not recom-

mended,

1. To check the temperature rise through the unit, place ther- mometers in the supply and return air ducts as close to the unit as possible,avoiding direct radiant heat from the heater

elements.

2. Open ALL registers and duct dampers.

3. Set thermostat Heat-Cool selector to HEAT.

4. Set the thermostat temperature setting as high as it will go.

5. Turn electric power ON.

6. Operate unitAT LEAST 5 minutes, then check temperature rise.

NOTE: The maximum outlet air temperature for all models is

200°F (93.3°C).

7. Set thermostat to normal temperature setting.

8. Turn electric power OFF.

9. Be sure to seat all holes in ducts if any were created during this process.

A-2 A-3

Two-Stage Capable Three-Stage Capable

EHIA15KB EHIA20KB EHIA25KB

EHIA10HB EHIA15HB

EHIA20HB EHIA25HB

EHIA25KB10

EHIA20HB EHIA25HB

451 01 4109 O0 3

MFWIRING

Figure 2 Electric Heat (Cooling and 1-Stage Electric Heat) Figure 3 and Electric Heat (Cooling and 1-Stage Electric Heat)

MV WIRING

Figure 4 Typical MV Wiring Layout with Air Conditioning Typical MV Wiring Layout with Heat Pump Unit

HEAT STAGE 2

HEAT STAGE 1

COOL STAGE 1

24 VAC HOT

I Typical MF Wiring Layout with Air Conditioning Unit and Typical MF Wiring Layout with Heat Pump Unit

THERMOSTAT THERMOSTAT

D D

RED

._ GRY

FAN COIL

AIR COND.

N- IN-

IN- N-

% K]

RED

_/_ GRY

BRN

FAN COIL

R G

W 3

,E ,

IN-

THERMOSTAT

FAN

A__

Unit and Electric Heat Figure 5 and Electric Heat

FAN COIL

REMOVE J2

F_q

"---_ JUMPER FOR

FOR HEAT

..._ STAGING

RVS COOLINGI--O_I

HEAT STAGE 3 HEAT STAGE 2_

HEAT / COOL I_v'_l

STAGE 1 I ' I

24 VAC HOT F_I

_A _q__

THERMOSTAT MV

FAN COIL

FAN

,_q

HEAT PUMP

(CONTROL)

-- REMOVE J2 JUMPEF FOR HEAT STAGING

HEAT PUMP

_-E3

_-EB A-E_

Fq F_

24 VAC COMM

24 VAC COMM F_I

,_q

_-E3

4 451 01 4109 O0

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