Installation Guide

I&O manual

Fig. 10 - Hose and Tube Identification

6.3 Condensate Line And Over Flow Pressure Swtich

CAUTION: FOR HORIZONTAL LEFT INSTALLATION (AIR DISCHARGE TO THE LEFT), HOSES OF CONDENSATE OVERFLOW PRESSURE SWITCH NEED TO BE

REROUTE. (SEE FIGURE XX)

Follow the bullets listed below when installing the drain system. Refer to the following sections for specific details concerning furnace

drain trap installation and drain hose hook ups.

•The drain trap supplied with the furnace must be used.

• The drain line between furnace and drain location must be constructed of 3/4” PVC or CPVC.

• The drain line between furnace and drain location must maintain a 1/4 inch per foot downward slope toward the drain.

• Do not trap the drain line in any other location than at the drain trap supplied with the furnace.

• Do not route the drain line outside where it may freeze.

• If the drain line is routed through an area which may see temperatures near or below freezing, precautions must be taken to prevent

condensate from freezing within the drain line.

• If an air conditioning coil is installed with the furnace, a common drain may be used. An open tee must be installed in the drain line, near the

cooling coil, to relieve positive air pressure from the coil’s plenum. This is necessary to prohibit any interference with the function of the

furnace’s drain trap.

6.3.1 Standard Right or Left Side Drain Hose Connections

All installations positions require the use of the drain trap, hoses, tubes, and clamps. The following quantity of hoses, tubes, and hose clamps

are provided with the unit.

To achieve higher energy efficiency than non-condensing furnace, condensing furnace will generate significant amount of condensate water

from combustion to recover latent heat in flue. Condensate generated from flue must be collected and discharged to drain line.

For some of venting directions and furnace installations, reroute condensate and/or overflow pressure switch hoses may be required.

Follow the instructions in Figure xx-xx for each installation:

DRAIN TRAP

21mm HOSE CLAMP

18mm HOSE CLAMP

DRAIN TRAP FIXING

14mm HOSE

16mm HOSE

BRACKET

14mm Tube 16mm Tube