5715184-BIM-A-0519
Johnson Controls Ducted Systems
13
ACCESSORY CONNECTIONS
The furnace control allows power-switching control of various accesso-
ries. See Figure 17 for connection details.
ELECTRONIC AIR CLEANER CONNECTION
Two 1/4 in. (0.64 cm) spade terminals (EAC and NEUTRAL) for elec-
tronic air cleaner connections are located on the control board. The ter-
minals provide 115 VAC (1.0 amp maximum) during circulating blower
operation.
HUMIDIFIER CONNECTION
Two 1/4 in. (0.64 cm) spade terminals (HUM and NEUTRAL) for humid-
ifier 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.
SECTION VI: CONDENSATE PIPING AND
FURNACE VENTING CONFIGURATION
CONDENSATE DRAIN LOCATION
As shipped from the factory:
•
For all 040, 060, and 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, and 130K input furnaces, the main drain is
plumbed through the casing left-side opening when viewed from
the front of the furnace.
The condensate hoses must slope downwards at all points.
When drain hose routing changes are required (shown in Figures 19–
20), be sure to cap all unused openings.
If rerouting hoses, excess length must be cut off so no sagging loops
collect and hold condensate, as this causes the furnace to not operate.
No hose clamps are needed for connecting to the condensate pan.
The condensate flows to the drain better if an open stand pipe is
installed in the drain line. See Figure 18.
If indoor coil or humidifier drains are combined with the furnace drain,
do not drain into the top opening of the vent stand pipe. Instead, install
a second tee in the vented drain tube below the furnace drain tee and
route additional drainage through the new tee.
FIGURE 17:
Accessory Connections
NOTICE
Figures 19–20 show the condensate drain arrangement for the var-
ious possible furnace and vent blower positions.
CAUTION
The furnace condensate pan is self priming and contains an inter-
nal trap to prevent flue gas leaking. Do not install an external con-
densate trap.
IMPORTANT:
The furnace, indoor coil, and humidifier drains may
be combined and drained together. The indoor coil drain may have
an external, field-supplied trap prior to the furnace drain connection
to prevent conditioned air leakage. All drain connections (furnace,
indoor 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.
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IMPORTANT:
Condensate must be disposed of properly. Follow
local plumbing or wastewater codes. The drain line must maintain a
1/4 in. per foot (20 mm/m) downward slope to the drain.
IMPORTANT:
If an external exhaust 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 sec-
ond trap as referenced elsewhere in this document.
CAUTION
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 installing the supplied vent drain and drain hose
located in the loose parts bag. The intake drain hose is to be
installed by connecting it to the inlet pipe coupling and to the collec-
tor box as shown in Figure 19. The drain hose must not sag or
droop after it is installed. If glue is used when connecting the intake
pipe to the intake coupling, the drain opening in the vent drain must
not be plugged. If the intake drain is used, the bird screen cannot
be installed. This is only approved for upflow and horizontal appli-
cations when the intake pipe is located on the top of the furnace.
This is true for all long horizontal venting in any furnace configura-
tion. This will keep condensate from entering the furnace.
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.
FIGURE 18:
Typical Condensate Drain, Vertical Installation
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