EHK Installation Manual

ManualsBrandsAirQuest ManualsCentral Air & Heating7 Kilowatt 23,800 BTU Heater Coil

482 01 2226 05 April 2011

Specifications are subject to change without notice

Electric Heat Accessory

Installation Instructions

EHK05AKN/B, EHK07AKN/B, EHK10AKN/B, EHK15AKF/B, EHK20AKF/B,

EHK15AHN, EHK18AHN, EHK09AKCN, EHK25AHCF, EHK30AHCF

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 immediate hazard. The signal words WARN-

ING, 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 se-

vere personal injury or death.

WARNING − Hazards or unsafe practices which could re-

sult in severe personal injury or death.

CAUTION − Hazards or unsafe practices which may re-

sult in minor personal injury or product or property dam-

age.

NOTE − Used to highlight suggestions which will result in

enhanced installation, reliability, or operation.

Signal Words in Manuals

The signal word WARNING is used throughout this

manual in the following manner:

The signal word CAUTION is used throughout this

manual 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

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 18kW, 24kW, and 30kW heat-

ers, remove adapter plate. (See Figure 1)

4. Insert heater assembly into front of fan coil so that ele-

ment rods engage holes in rear heat shield.

5. Attach heater control plate to fan coil using 2 screws pro-

vided. For 18kW, 24kW, and 30kW heater models, attach

front of heater to fan deck using third screw. (See

Figure 1)

Summary of content (13 pages)

PAGE 1
Electric Heat Accessory Installation Instructions EHK05AKN/B, EHK07AKN/B, EHK10AKN/B, EHK15AKF/B, EHK20AKF/B, EHK15AHN, EHK18AHN, EHK09AKCN, EHK25AHCF, EHK30AHCF Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals 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 immediate hazard.
PAGE 2
Figure 1 Installing The Electric Heat Accessory Installation of 18kW, 24kW, and 30kW Model Heaters Part Number EHK05AKN EHK05AKB EHK07AKN EHK07AKB EHK09AKCN EHK10AKN EHK10AKB EHK15AKF EHK15AKB* EHK15AHN EHK18AHN EHK20AKF EHK20AKB* EHK25AHCF EHK30AHCF Table 1 − Accessory Heater Usage Description 5 kW, single phase, no internal circuit protection 5 kW, single phase, with circuit breakers 8 kW, single phase, no internal circuit protection 8 kW, single phase, with circuit breakers 9 kW, supplied as single p
PAGE 3
AIRFLOW DELIVERY (CFM) EBV/FVM Model Size Outdoor Unit Capacity (BTUH) 18 24 30 36 24 30 36 42 Electric Heater kW Range 0−5 LO NOM 0 − 10 HI LO NOM 0 − 15 HI LO NOM 625 650 815 980 675 815 980 1140 625 625 675 675 675 * * 725 835 * 725 835 875 875 2400 905 1040 * 905 1040 900 900 1085 1250 980 1085 1250 980 1085 725 835 875 875 * * * 905 1040 875 905 1040 1100 1100 3600 1085 1250 980 1085 1250 1100 1100 1270 1460 1140 1270 1460 1140 1270 0 − 10 0 − 15 0 − 20 30 975 975 1040 1100 1100 1100 * * 36
PAGE 4
ATTACH FUSE BOX OR CIRCUIT BREAKER BOX 1. For 15kW and 20kW fused models: After installing heater assembly, attach fuse assembly to side of fan coil unit by inserting fuse box tab between insulation and to left side of unit and fan deck. Mount front of assembly to side flange with two (2) screws provided. On fan coil units size 4200 and larger, remove wire tie that shortens wire length between heater and fuses. Fuse cover is closed by engaging dimples in fuse box. (See Figure 2) 2.
PAGE 5
3. Heater staging The units are shipped circuited for single stage operation. The heat can be staged either through an indoor thermostat or by using an outdoor thermostat. When two stages are desired, cut W3 at the W2 wire nut, strip and reconnect per wiring staging layout in Installation Instructions for fan coils. a. The 5kW, 8kW, and 10kW heaters are single stage only. b. The 9kW and 15kW heaters are adaptable for two stage operation. c.
PAGE 6
D. FAN SPEED SELECTION ADJUSTING THERMOSTAT ANTICIPATOR FSM, FSU, EBP, EBX, EBXX & EBW Motor Speed Selection Set the heat anticipator of the thermostat to the proper value. Each stage of heat is approximately 0.08 amps per relay. See instructions provided with the thermostat before making this adjustment. 1. Speed tap selection is done at fan relay. To change motor speeds, disconnect fan lead on relay and replace with motor speed tap desired.
PAGE 7
Figure 7 5, 8 and 10 kW Circuit Breaker and Disconnect Heaters Figure 10 15 kW 3−Phase Heater lug 7 Figure 8 15 and 20 kW Fused Heaters Figure 11 Figure 9 15 and 20 kW Circuit Breakers Figure 12 24 and 30 kW Heaters Specifications are subject to change without notice 18 kW 3−Phase Heater 482 01 2226 05
PAGE 8
Figure 13 24 and 30 kW Heaters Figure 14 Figure 15 Figure 16 Conversion of Circuit Breaker Figure 17 Heater Rating Label Location 24 and 30 kW Heaters Motor Speed Tap and Fan Relay 8 482 01 2226 05 Specifications are subject to change without notice
PAGE 9
ELECTRIC HEATER ELECTRICAL DATA BRANCH CIRCUIT Heater kW Heater Model PHASE Dual Circuit Max Wire Length 208/230V (Ft)‡‡ Dual Circuit Dual Circuit Specifications are subject to change without notice L1,L2 L3,L4 Single Circuit L1, L2 L3, L4 Single Circuit L1, L2 L3,L4 Single Circuit L1,L2 L3,L4 Single Circuit L1,L2 L3,L4 None 18.1/20.0 — — 26.0/28.4 — — 10/10 — — 10/10 — — 30/30 — — 66/66 — — 1 None 18.1/20.0 — — 31.2/33.
PAGE 10
WIRING DIAGRAM FOR HEAT ACCESSORIES EHK05AKN/B, EHK07AKN/B, EHK10AKN/B N = NON−FUSED, B = CIRCUIT BREAKER S C HEMAT IC DIAGRAM S INGLE S UP P LY C IR CUIT S E E R AT ING P LAT E F OR V OLTS & HER T Z FIELD POW ER W IR ING COMPONENT ARR ANGEMENT H E A T E R V A : 1.
PAGE 11
WIRING DIAGRAM FOR HEAT ACCESSORIES EHK20AKF/B F = FUSED, B = CIRCUIT BREAKER H E A T E R V A : 5.
PAGE 12
WIRING DIAGRAM FOR HEAT ACCESSORIES EHK18AHN THREE PHASE, N = NON−FUSED H E A T E R V A : 5.
PAGE 13
WIRING DIAGRAM FOR HEAT ACCESSORIES EHK25AHCF, EHK30AHCF (Shipped three phase, see below.