Johnson Controls Residential Gas TM9V MP - Manual (Page 16)

438335-UIM-B-0509
16 Johnson Controls Unitary Products
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.
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 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 & 120K input furnaces the main drain is plumbed
through the casing left-side opening when viewed from the front
of the furnace.
NOTE: The Figures 24 - 27 show the condensate drain arrange-
ment for the various possible furnace and vent blower positions.
The condensate hoses must slope downwards at all points.
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.
The condensate will flow to the drain better if an open stand pipe is
installed in the drain line. See Figure 23.
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.
The furnace condensate pan is self priming and con-
tains an internal trap to prevent flue gas leaking. Do
not install an external condensate trap.
The furnace, evaporator coil, and humidifier drains may be com-
bined and drained together. The evaporator coil drain must have
an external, field-supplied trap prior to the furnace drain connec-
tion. 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.
Condensate must be disposed of properly. Follow local plumbing
or wastewater codes. The drain line must maintain a 1/4" per foot
(21 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
elsewhere in this document.
FIGURE 22: Typical. Condensate drain, vertical installation.
It is possible for condensation to form inside the combustion air
(intake) pipe in the summer months if significant length of combus-
tion 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 possi-
ble, as shown in Figure 24. This is true for all long horizontal vent-
ing in any furnace configuration. This will prevent the condensate
from entering the furnace.
To Open Or
Vented Drain
Tee
5” Min.
Open Stand Pipe
(Anti-siphon air vent)