Johnson Controls TM9X*MP Accessory Connections, Electronic AIR Cleaner Connection, Twinning

ACCESSORY CONNECTIONS

The furnace control will allow power-switching control of various acces- sories.

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 opera- tion.

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.

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 input furnaces the main drain is plumbed through the casing left-side opening when viewed from the front of the fur- nace.

NOTICE

The Figures 22 - 25 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 22- 25), 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.

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.

697936-UIM-B-01211

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 20: 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 20.

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.

It is possible for condensation to form inside the combustion air (intake) pipe in the summer months if significant length of combustion air pipe passes through conditioned space. This problem can be averted by the addition of a simple drain tee, or a drain tee with a drain on the combustion air pipe as close to the furnace as possible, as shown in Figure 21. This is true for all long horizontal venting in any furnace configuration. This will prevent the condensate from entering the furnace.

Johnson Controls Unitary Products 15