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INSTALLATION MANUAL
Standard ECM Single Piece
Multi-position Air Handlers
Models: JHET Series
- 208/230 V - Single and Three-Phase
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Ductwork and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Coil metering devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Condensate drain connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electric heater installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Return air duct attachment and component location . . . . . . . . . . . . . 2
Pressure check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Dimensions and duct connection dimensions . . . . . . . . . . . . . . . . . . 3
Typical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Horizontal baffle plate installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Suspension support locations for horizontal applications . . . . . . . . . 6
Duct attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ductwork transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommended distributor adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7
Piston installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TXV installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TXV bulb and equalizer line installations . . . . . . . . . . . . . . . . . . . . . . 8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Horizontal suspension dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical and electrical data - cooling only . . . . . . . . . . . . . . . . . . . . 12
Electrical data - cooling only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical heat: minimum fan speed . . . . . . . . . . . . . . . . . . . . . . . . . 12
Application factors - rated CFM versus actual CFM . . . . . . . . . . . . . 12
Section I: General
The single piece air handler series provides the flexibility for installation
in any position. This unit may be used for upflow, downflow, horizontal
right, or horizontal left applications.
These units may be located in a closet, utility room, attic, crawl space,
or basement. These versatile models may be used for cooling or heat
pump operation with or without electric heat.
Top or side power and control wiring, color coded leads for control wir-
ing, and electric heaters all combine to make the installation easy and
minimize installation cost.
Electric heat kits are available as field installed accessories. Single
phase kits are available from 2.5 kW to 25 kW and 208/230 V three
phase kits are available from 10 kW to 25 kW.
Section II: Safety
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Johnson Controls Ducted Systems
List of sections
Low voltage control connections . . . . . . . . . . . . . . . . . . . . . . . . . 11
Blower speed connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Air system adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Installation verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
List of figures
Correct bulb location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Grommets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Blower speed connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Duct static measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Drain traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Location of coil trapped and plugged drain connections . . . . . . . . . . 20
Wiring diagram - standard ECM - single phase heat kits . . . . . . . . . 21
Wiring diagram - 208/230V three phase heat kits . . . . . . . . . . . . . . . 22
Standard ECM AH conventional wiring diagrams . . . . . . . . . . . . . . . 23
HMH7 HP connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
List of tables
Electrical data for multi-source power supply: 208/230-1-60 . . . . . . 15
Electrical data for multi-source power supply: 208/230-3-60 . . . . . . 16
Airflow data (CFM per Watts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
FIRE OR ELECTRICAL HAZARD
Failure to follow the safety warnings exactly could result in serious
injury, death or property damage. A fire or electrical hazard may result
causing property damage, personal injury or loss of life.
WARNING
!
6112628-UIM-B-0622
®
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Table of Contents
Related Manuals for Johnson Controls JHET Series
Summary of Contents for Johnson Controls JHET Series
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Page 1: Table Of Contents
Standard ECM Single Piece Multi-position Air Handlers ® Models: JHET Series - 208/230 V - Single and Three-Phase List of sections General ..........1 Low voltage control connections . -
Page 2: Safety
Primary drain pan Primary drain 3/4 in. NPT Cabinet brace Screw Filter door Return air duct Secondary drain upflow 3/4-in. NPT Ductwork Screw Screw Front view A1693-001 Figure 1: Return air duct attachment and component location Johnson Controls Ducted Systems... -
Page 3: Pressure Check
12 3/16 in. Blower compartment Coil compartment Service disconnect panel 15 in. Bottom inlet dimensions 1 1/2 in. 18 5/8 in. Filter access 20 1/2 in. 21 7/16 in. A1694-001 Figure 3: Dimensions and duct connection dimensions Johnson Controls Ducted Systems... -
Page 4: Unit Installation
2. Maintenance and servicing access - minimum 36 in. from the front assembly repositioned. See Downflow or horizontal right conversion. of the unit for blower motor or coil replacement 3. Condensate drain lines routed to clear filter and panel access 4. Filter removal - minimum 36 in. Johnson Controls Ducted Systems... -
Page 5: Typical Installation
Right side view Right side view (exploded) Horizontal baffle plate (fitted with two screws) Horizontal baffle plate Coil Primary drain pan Left side view (exploded) Front sectional view Left side view A1706-001 Figure 5: Horizontal baffle plate installation Johnson Controls Ducted Systems... -
Page 6: Ductwork And Connections
See Figure 1 for the location of the cabinet braces. NOTICE A1696-001 Figure 7: Duct attachment When assembling the support structure, size to provide clearance for access door removal. Johnson Controls Ducted Systems... -
Page 7: Coil Metering Devices
Do not install the Schrader valve core if installing the TXV, because the TXV equalizer line attaches to the equalizer connection port. A1670-001 Figure 9: Recommended distributor adjustment Johnson Controls Ducted Systems... -
Page 8: Piston Installation
8. Install the TXV bulb to the vapor line near the TXV equalizer tube an additional 1/4 turn to seal. connection port, using the bulb clamps supplied with the TXV assembly. Ensure the bulb makes maximum contact. See Figure 12 and Figure 13, and complete the following steps: Johnson Controls Ducted Systems... -
Page 9: Refrigerant Line Connection
2. Remove the grommets where the tubes exit the cabinet to prevent burning them during brazing. In some units, the grommets may be shipped as loose parts with the unit. See Figure 14. Johnson Controls Ducted Systems... -
Page 10: Condensate Drain Connections
Do not use PTFE tape, pipe thread compound, or other sealants. Use of a sealant can cause damage and premature failure of the drain pan. Johnson Controls Ducted Systems... -
Page 11: Low Voltage Control Connections
(tap one) is needed for first stage compressor speed, leave the continuous fan speed wire connected to speed tap one and let the room A1772-001 thermostat provide the signal (through its G output) for first stage Figure 16: Blower speed connections Johnson Controls Ducted Systems... -
Page 12: Physical And Electrical Data - Cooling Only
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar. Table 6: Application factors - rated CFM versus actual CFM % of rated airflow (CFM) Capacity factor 0.96 0.98 1.02 1.03 Johnson Controls Ducted Systems... -
Page 13: Kw And Mbh Conversions - For Total Power Input Requirement
8HK(0,1)6500806 39.6 43.3 B30D 8HK(0,1)6501006 48.0 52.6 8HK(1,2)6501506 69.7 76.5 8HK(1,2)6502006 91.3 100.4 8HK(0,1)6500206 15.6 16.7 8HK(0,1)6500506 26.4 28.7 8HK(0,1)6500806 39.6 43.3 B36D 8HK(0,1)6501006 48.0 52.6 8HK(1,2)6501506 69.7 76.5 8HK(1,2)6502006 91.3 100.4 Continued on next page Johnson Controls Ducted Systems... - Page 14 3. MOP = Maximum Overcurrent Protection device; must be HACR type circuit breaker or time delay fuse. Refer to the latest edition of the National Electric Code or in Canada the Canadian electrical Code and local codes to determine correct wire sizing. Johnson Controls Ducted Systems...
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Page 15: Electrical Data For Multi-Source Power Supply: 208/230-1-60
46.2 C42F 46.2 54.7 60.0 8HK16502025 8HK06501025 23.1 31.7 34.4 8HK06501525 34.6 44.2 48.2 C48G 46.2 56.7 62.0 8HK16502025 8HK06501025 23.1 31.7 34.4 8HK06501525 34.6 44.2 48.2 D48G 46.2 56.7 62.0 8HK16502025 Continued on next page Johnson Controls Ducted Systems... -
Page 16: Electrical Data For Multi-Source Power Supply: 208/230-3-60
— — — — Medium low (2) — — — — — — — — — — — — — — Low (1) — — — — — — — — — Continued on next page Johnson Controls Ducted Systems... - Page 17 1375 1325 1300 1250 1200 1150 1125 1075 1025 Medium high (4) 1050 1000 C42F Medium (3) Medium low (2) — — — — — Low (1) — — — — — Continued on next page Johnson Controls Ducted Systems...
- Page 18 Airflow data shown is from testing performed at 230 V. JHET units use a standard ECM constant torque motor and there is minimal variation of airflow at other distri- bution voltage values. The above data can be used for airflow at other distribution voltages. Johnson Controls Ducted Systems...
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Page 19: Maintenance
Primary and the indoor coil. Premade traps Handmade traps A1705-001 Figure 18: Drain traps Johnson Controls Ducted Systems... -
Page 20: Location Of Coil Trapped And Plugged Drain Connections
Horizontal drain Horizontal drain trap connection trap connection Primary drain trap connection Drain plug for Drain plug for Primary drain horizontal drain primary drain trap connection A1698-001 Figure 19: Location of coil trapped and plugged drain connections Johnson Controls Ducted Systems... -
Page 21: Wiring Diagram
6112628-UIM-B-0622 Section XVI: Wiring diagram Figure 20: Wiring diagram - standard ECM - single phase heat kits Johnson Controls Ducted Systems... -
Page 22: Wiring Diagram - 208/230V Three Phase Heat Kits
RED / WHITE FACTORY WIRING LOW VOLTAGE BLACK USE COPPER CONDUCTORS ONLY. IF ALUMINUM CONDUCTORS ARE PRESENT, ALL APPLICABLE LOCAL AND NATIONAL CODES MUST BE FOLLOWED. 6151789-UWD-A-0821 Figure 21: Wiring diagram - 208/230V three phase heat kits Johnson Controls Ducted Systems... -
Page 23: Control Wiring
Figure 27: Standard ECM AH and single-stage HP - conventional Figure 23: Standard ECM AH and standard multi-stage AC - wiring conventional wiring Multi-stage Thermostat Air handler air conditioner Y/Y2 A1773-001 Figure 24: Standard ECM AH and premium multi-stage AC - conventional wiring Johnson Controls Ducted Systems... -
Page 24: Hmh7 Hp Connection
6112628-UIM-B-0622 Heat pump thermostat Heat pump Disconnect YEL/BLK lead from the blower motor S1-HMH7AK001 Accessory relay kit (required) Air handling unit A1763-001 Figure 28: HMH7 HP connection Johnson Controls Ducted Systems... -
Page 25: Start-Up Sheet
Return air dry bulb temperature Return air wet bulb temperature Total external static pressure Temperature drop Supply air wet bulb temperature Other switches (check all that apply) HUMIDISTAT AC/HP CONT FAN 100% Continued on next page Johnson Controls Ducted Systems... - Page 26 Explain the importance of regular filter replacement and equipment maintenance. Comments and additional job details Subject to change without notice. Published in U.S.A 6112628-UIM-B-0622 Copyright © 2022 by Johnson Controls. All rights reserved. Supersedes: 6112628-UIM-A-1221 York International Corp. 5005 York Drive...
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Questions and answers
When should the electric assist be turned on and how is that done?
The electric assist (electric heat kit) for the Johnson Controls JHET Series should be installed if the air handler requires electric heat. It is activated by installing an appropriate 8HK electric heat kit according to the kit’s installation instructions. After installation, the air handler nameplate must be marked to indicate the specific heater kit installed. If no heater is installed, the nameplate should be marked accordingly. The heater is controlled through the unit’s wiring and control system once properly installed.
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