Trane DX1B060A9361A, UX1C100A9481A, UX1C080A9601A manual Installer’s Guide, Twinning Furnaces

Installer’s Guide

NOTE:

Use 1/2" or larger PVC or CPVC pipe and fittings as re- quired for drain connections (fittings, pipe and solvent cement not provided).

NOTE:

A corrosion resistant condensate pump must be used if a pump is required for a specific drain system.

IMPORTANT:

The condensate drain should be installed with provi- sions to prevent winter freeze-up of the condensate drain line. Frozen condensate will block drains, result- ing in furnace shutdown. If the drain line cannot be in- stalled in a conditioned space, then UL listed heat tape should be applied as required to prevent freezing (per manufacturer’s instructions). The heat tape should be rated at 5 or 6 watts per foot at 120 volts. Self-regulat- ing (preferred) or thermostatically controlled heat tape is required.

Evaporator and furnace condensate drain piping may be manifolded together as shown in Figure 52. A pri- mary drain vent stack must be installed and termi- nated below the outlet of the secondary heat exchanger drain connection to prevent water from damaging fur- nace controls if the primary drain outlet plugs up. Where the furnace is installed above a finished ceiling, the primary drain vent stack must be installed such that overflow from the vent stack opening will flow into an axillary drain pan in order to prevent water damage to the finished ceiling below.

TWINNING FURNACES

These furnaces may be twinned. Twinning requires that two furnaces with the same configuration, capacity, and airflow must be used. They shall have common returns with equal pressure drops or ducts with equivalent lengths and sizes. See Field Wiring Diagrams for proper hookup.

W

If upflow furnace is installed over a finished ceiling, overflow from the primary drain vent stack must flow into an auxillary drain pan to prevent damage to the finished ceiling below.

Primary drain vent stack must terminate below secondary heat exchanger condensate drain outlet.

To drain opening

B/C

FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE

1 STAGE HEATING

USING A 1 STAGE HEATING THERMOSTAT

NO COOLING

FURNACE

SEE

NOTE 7

TWIN

SEE
NOTE 6	B/C	TO 115 V 1 PH.,
		60 HZ., POWER
		SUPPLY PER
		LOCAL CODES

HUM SEE

NOTE 5

EAC SEE

NOTE 5

From drawing B341437 Rv 1

28 18-CD19D6-32