Johnson Controls JMET Series Installation Manual
Johnson Controls JMET Series Installation Manual

Johnson Controls JMET Series Installation Manual

Standard ecm modular multi-position air handlers
Table of Contents

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INSTALLATION MANUAL
Standard ECM
Modular Multi-position Air Handlers
Models: JMET Series
- 208/230 V - Single and Three-Phase
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ductwork and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electric heater installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Low voltage control connections . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dimensions and duct connection dimensions . . . . . . . . . . . . . . . . . . 3
Typical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Coil and air handler attachment details . . . . . . . . . . . . . . . . . . . . . . . 4
Gasket location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
- that require the drain pan extension . . . . . . . . . . . . . . . . . . . . . . . . 6
- that do not require the drain pan extension . . . . . . . . . . . . . . . . . . . 6
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical and electrical data - cooling only . . . . . . . . . . . . . . . . . . . . . 8
Electrical data - cooling only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Section I: General
The JMET modular air handler series provides the flexibility for installa-
tion in any position. This unit may be used for upflow, downflow, hori-
zontal 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 or indoor coil.
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.
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.
Johnson Controls Ducted Systems
List of sections
Blower speed connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Air system adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
List of figures
Duct attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ductwork transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Blower speed connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Duct static measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring diagram - 208/230V three phase heat kits . . . . . . . . . . . . . . . 15
Standard ECM AH conventional wiring diagrams . . . . . . . . . . . . . . . 16
HMH7 HP connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
List of tables
Airflow data (CFM per Watts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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.
The air handler area must not be used as a broom closet or for any
other storage purposes, as a fire hazard may be created. Never store
items such as the following on, near or in contact with the furnace.
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum clean-
ers or other cleaning tools.
2. Soap powders, bleaches, waxes or other Cleaning compounds;
plastic items or containers; gasoline, kerosene, cigarette lighter
fluid, dry cleaning fluids or other volatile fluid.
3. Paint thinners and other painting compounds.
4. Paper bags, boxes or other paper products.
Never operate the air handler with the blower door removed. To do so
could result in serious personal injury and/or equipment damage.
WARNING
!
WARNING
!
6139716-UIM-A-0422
®

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Summary of Contents for Johnson Controls JMET Series

  • Page 1: Table Of Contents

    Standard ECM Modular Multi-position Air Handlers ® Models: JMET Series - 208/230 V - Single and Three-Phase List of sections General ..........1 Blower speed connections .
  • Page 2: Safety

    • These models are not CSA listed or approved for installation into • Install the air handler so the electrical components are protected a HUD-approved modular home or a manufactured (mobile) from water. home. Johnson Controls Ducted Systems...
  • Page 3: Unit Installation

    Wet bulb temperature (°F) Dry bulb temperature (°F) Air handler voltage Normal operating voltage range Minimum Maximum Minimum Maximum 208/230-1-60 187 V to 253 V 1. Rated in accordance with ARI Standard 110, utilization range A. Johnson Controls Ducted Systems...
  • Page 4: Typical Installation

    Figure 3: Typical installation Slide the coil into the housing and install the coil access panel and Outer tie plate (three places) coil filter door. Blower Coil A1757-001 Figure 4: Coil and air handler attachment details Johnson Controls Ducted Systems...
  • Page 5: Ductwork And Connections

    Use a transition to match unit opening to correctly size the supply air duct. Suspend all ducts using flexible hangers and never fasten directly to the structure. When assembling the support structure, size to provide clearance for access door removal. Johnson Controls Ducted Systems...
  • Page 6: Electric Heater Installation

    180° so the up position of the discon- nect is the ON position. This service disconnect orientation change is required by UL 60335-2-40 (in reference to all circuit breakers). A1696-001 Figure 9: Duct attachment Johnson Controls Ducted Systems...
  • Page 7: Line Power Connections

    See Table 14 for airflow data. Connect the motor wires to the motor speed tap receptacle for the speed required. Johnson Controls Ducted Systems...
  • Page 8: Physical And Electrical Data - Cooling Only

    High (5) High (5) Medium (3) Medium (3) 8HK(0,1)6501006 Medium (3) High (5) High (5) Medium (3) Medium (3) 8HK06501025 8HK(1,2)6501506 14.4 — High (5) High (5) Medium (3) Medium (3) 8HK06501525 Continued on next page Johnson Controls Ducted Systems...
  • Page 9: Electrical Heat With Heat Pump: Minimum Fan Speed (Xah)

    For a power distribution voltage that is different from the provided nominal voltage, multiply the kW and MBH data from Table 9 by the conversion. Distribution power (V) Nominal voltage (V) Conversion factor 0.75 0.84 0.92 Johnson Controls Ducted Systems...
  • Page 10: Electric Heat Performance Data: 208/230-1-60 And 208/230-3-60

    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...
  • Page 11: Electrical Data For Multi-Source Power Supply: 208/230-1-60

    2. MOP = Maximum overcurrent protection device; must be HACR type circuit breaker or time delay fuse. The first circuit includes blower motor amps. Refer to the lat- est 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...
  • Page 12: Airflow Data (Cfm Per Watts)

    • Airflow data shown is from testing performed at 230 V. JMET units use a standard ECM constant torque motor and there is minimal variation of airflow at other distribution voltage values. The above data can be used for airflow at other distribution voltages. Johnson Controls Ducted Systems...
  • Page 13: Maintenance

    Drill a hole 12 in. away from the air handler in the supply air duct. You must take the return air pressure reading between the indoor coil and the air handler. Figure 13: Duct static measurements Johnson Controls Ducted Systems...
  • Page 14: Wiring Diagram

    6139716-UIM-A-0422 Section XII: Wiring diagram Figure 14: Wiring diagram - standard ECM - single phase heat kits Johnson Controls Ducted Systems...
  • Page 15: 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 15: Wiring diagram - 208/230V three phase heat kits Johnson Controls Ducted Systems...
  • Page 16: Control Wiring

    Figure 17: Standard ECM AH and standard multi-stage AC - Figure 20: Standard ECM AH and single-stage AC - conventional conventional wiring wiring Thermostat Air handler Heat pump Y/Y2 W OUT A1768-001 Figure 21: Standard ECM AH and single-stage HP - conventional wiring Johnson Controls Ducted Systems...
  • Page 17: Hmh7 Hp Connection

    6139716-UIM-A-0422 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 22: HMH7 HP connection Johnson Controls Ducted Systems...
  • Page 18 6139716-UIM-A-0422 NOTES Johnson Controls Ducted Systems...
  • Page 19: 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 20 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 6139716-UIM-A-0422 Copyright © 2022 by Johnson Controls. All rights reserved. Supersedes: Nothing York International Corp. 5005 York Drive...

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