ACCESSORY CONNECTIONS

The furnace control will allow power-switching control of various accessories.

ELECTRONIC AIR CLEANER CONNECTION

Two 1/4” (6.4 mm) spade terminals (EAC and NEUTRAL) for electronic air cleaner connections are located on the control board. The terminals provide 115 VAC (1.0 amp maximum) during circulating blower operation.

HUMIDIFIER CONNECTION

Two 1/4” (6.4 mm) spade terminals (HUM and NEUTRAL) for humidifier connections are located on the control board. The terminals provide 115 VAC (1.0 amp maximum) during heating system operation.

A mounting hole is provided on the control panel next to the furnace control board for mounting a humidifier transformer if required.

SINGLE STAGE THERMOSTAT

If a single stage thermostat is used, the high/low input staging will be controlled by the furnace control board, using the staging jumper. If the staging jumper is set to the 10, 15, or 20 position, the furnace will switch from low fire to high fire after 10, 15, or 20 minutes and will stay in high fire until the thermostat is satisfied. If the staging jumper is left in the OFF position and a single stage thermostat is used, the furnace will only operate at low fire.

TWINNING

These furnaces are not to be twinned. If more than one furnace is needed in an application, each furnace must have its own complete duct system and its own wall thermostat.

SECTION VI: CONDENSATE PIPING AND FURNACE VENTING CONFIGURATION

CONDENSATE DRAIN LOCATION

As shipped from the factory:

For all 040, 060, & 080K input furnaces the main drain is plumbed through the casing right-side opening when viewed from the front of the furnace.

For all 100, 120, & 130K input furnaces the main drain is plumbed through the casing left-side opening when viewed from the front of the furnace.

NOTICE

The Figures 24 - 27 show the condensate drain arrangement for the various possible furnace and vent blower positions.

The condensate hoses must slope downwards at all points.

The furnace condensate pan is self priming and contains an internal trap to prevent flue gas leaking. Do not install an external condensate trap.

When drain hose routing changes are required (shown in Figures 24- 27), be sure to cap all un-used openings.

If rerouting hoses - excess length should be cut off so that no sagging loops will collect and hold condensate - which will cause the furnace to not operate.

No hose clamps are needed for connecting to the condensate pan.

701379-UIM-C-0712

The furnace, evaporator coil, and humidifier drains may be combined and drained together. The evaporator coil drain may have an exter- nal, field-supplied trap prior to the furnace drain connection to prevent conditioned air leakage. All drain connections (furnace, evaporator coil, or humidifier) must be terminated into an open or vented drain as close to the respective equipment as possible. Regular maintenance is required on condensate drainage system.

Condensate must be disposed of properly. Follow local plumbing

or wastewater codes. The drain line must maintain a 1/4" per foot (20 mm/m) downward slope to the drain.

If an external vent tee is being installed, then it must have its own condensate trap before it is disposed into an open or vented drain.

This is not to be considered as a second trap as referenced else- where in this document.

Open Stand Pipe (Anti-siphon air vent)

5” Min.

Tee

To Open Or

Vented Drain

FIGURE 22: Typical. Condensate drain, vertical installation

The condensate will flow to the drain better if an open stand pipe is installed in the drain line. See Figure 22.

If evaporator coil or humidifier drains are combined with the furnace drain, then the open stand pipe could be raised higher, above the 5” minimum.

NOTICE

A loop has been added to the pressure switch vacuum hose. How- ever, ensure that all pressure switch hoses are routed such that they prevent any condensate from entering the pressure switch.

Johnson Controls Unitary Products

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Johnson Controls TM9V*MP Accessory Connections, Electronic AIR Cleaner Connection, Humidifier Connection, Twinning

TM9V*MP specifications

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