W415-1117 / A / 03.11.14
34
IOM
IOM
H16.4.1
A typical con
fi
guration would be to cement the side branch of a 1/2” CPVC tee to the drain trap assembly
outlet, with the end branches oriented vertically. (Figure 15)
A 1” (25mm) piece of 1/2” CPVC pipe cemented to the upper end branch will serve as a vent, which will
prevent the creation of a vapor lock, and serve as an over
fl
ow in the event that the drain line becomes
blocked. A similarly sized piece of pipe cemented to the lower end branch will permit connection to the
condensate outlet with 5/8” ID / 7/8” OD
fl
exible tubing, or the condensate may be piped entirely in CPVC to
the
fl
oor drain/sump/condensate pump.
IMPORTANT:
IF AN AIR CONDITIONING EVAPORATOR COIL DRAIN IS TO SHARE THE FURNACE DRAIN
LINE, IT SHOULD BE CONNECTED WITH A TEE FITTING DOWNSTREAM FROM THE
TRAP. DO NOT CONNECT THE EVAPORATOR COIL CONDENSATE DRAIN UPSTREAM OF
THE FURNACE DRAIN TRAP ASSEMBLY.
NOTE
It is recommended that the condensate drain assembly not be cemented to the condensate trap
outlet, if removal of the condensate trap is required in the future. Use a piece of the provided 1/2”
drain hose if removal of the condensate trap is anticipated.
11.4.2
PRIMING CONDENSATE TRAP
H16.4.2
IMPORTANT:
THE CONDENSATE DRAIN TRAP ASSEMBLY SHOULD BE FULL OF WATER (PRIMED)
BEFORE STARTING THE FURNACE. TO FILL THE CONDENSATE DRAIN TRAP ASSEMBLY,
TEMPORARILY REMOVE THE VENT DRAIN HOSE FROM THE EXHAUSTER ASSEMBLY
ELBOW/DRAIN FITTING, AND POUR APPROXIMATELY ONE CUP OF WATER DOWN THE
HOSE. WATER WILL BEGIN RUNNING OUT THE CONDENSATE DRAIN TRAP OUTLET
WHEN IT IS FULL. REFASTEN THE VENT DRAIN HOSE TO THE EXHAUSTER ASSEMBLY
ELBOW/DRAIN FITTING.
THE CONDENSATE DRAINAGE CONFIGURATION REQUIRES A VENT. IT TAKES LESS
THAN A ONE INCH RISE ANYWHERE ALONG THE HORIZONTAL ROUTE OF THE DRAIN
TUBE TO CREATE A VAPOR LOCK, WHICH WILL PREVENT CONDENSATE FROM
DRAINING AWAY FREELY, AND RESULT IN ERRATIC FURNACE OPERATION.
11.5 ALTERNATE CONDENSATE DRAIN INSTALLATION USING 1/2” PVC OR 3/4”
CPVC
1. The supplied parts bag includes a length of 1/2” and 5/8” rubber hose and the condensate trap. Install the
condensate trap according to instructions included in this manual.
FIGURE
21
FIGURE 22
