Johnson Controls Ducted Systems 6139716-UIM-A-0422
Standard ECM
Modular Multi-position Air Handlers
Models: JMET Series
- 208/230 V - Single and Three-Phase
INSTALLATION MANUAL
®
List of sections
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ductwork and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electric heater installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Low voltage control connections . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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
Return air duct attachment and component location . . . . . . . . . . . . . 2
Dimensions and duct connection dimensions . . . . . . . . . . . . . . . . . . 3
Typical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Coil and air handler attachment details . . . . . . . . . . . . . . . . . . . . . . . 4
Duct section - modular air handler - horizontal right . . . . . . . . . . . . . 4
Gasket location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Suspension support locations for horizontal applications
- that require the drain pan extension . . . . . . . . . . . . . . . . . . . . . . . . 6
- that do not require the drain pan extension . . . . . . . . . . . . . . . . . . . 6
Duct attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Ductwork transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Line power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Blower speed connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Duct static measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Wiring diagram - standard ECM - single phase heat kits . . . . . . . . .14
Wiring diagram - 208/230V three phase heat kits . . . . . . . . . . . . . . .15
Standard ECM AH conventional wiring diagrams . . . . . . . . . . . . . . .16
HMH7 HP connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
List of tables
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical and electrical data - cooling only . . . . . . . . . . . . . . . . . . . . . 8
Electrical data - cooling only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical heat with heat pump: minimum fan speed (XAF) . . . . . . . . 8
Electrical heat with heat pump: minimum fan speed (XAH) . . . . . . . . 9
Default blower speeds for FER compliance - electrical heat only . . . 9
Application factors - rated CFM versus actual CFM . . . . . . . . . . . . . . 9
kW and MBH conversions for total power input requirement . . . . . . .9
Electric heat performance data: 208/230-1-60 and 208/230-3-60 . .10
Electrical data for single source power supply: 208/230-1-60 . . . . .10
Electrical data for multi-source power supply: 208/230-1-60 . . . . . .11
Electrical data for single source power supply: 208/230-3-60 . . . . .11
Electrical data for multi-source power supply: 208/230-3-60 . . . . . .11
Airflow data (CFM per Watts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
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.
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.
WARNING
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
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.
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