Trane Modu manual Water Piping, Condenser Connections, Table I-MR-1. Water Connection Sizes

Mechanical

Installation Requirements

Water Piping

Note: To prevent water damage, install all piping drain and vent plugs.

Condenser Connections

Condenser water piping knockouts are in the lower left end panel. If necessary, remove insulation to gain access. All field installed piping must conform to applicable local, state, and federal codes. To complete condenser water connections follow the procedure below.

Note: Four condenser waterline drain plugs ship in a bag in the unit’s left end. The installer must field install these four plugs using pipe thread sealer. An addi-

2.Attach the water supply line to the inlet connection, and the return line to the outlet connection. Entering and leaving water connections for all condensers are factory manifolded and require only single connections for entering and leaving water. If the unit has a waterside economizer and/or control valves, the factory pipes between these components.

3.If using a cooling tower, refer to Figure

I-MR-3 on page 35 for a typical piping circuit from the unit. For typical city or well water piping, see Figure I-MR-4 on page 35.

4.Ensure the water pressure to the unit does not exceed 400 psig.

Condensate Drain Connections The condensate drain is internally trapped. Condensate drain connections are on the unit’s left side. Connect condensate drain piping to the 1 1/4“ NPT female fitting, using at least 7/8” OD copper or 3/4“ OD iron pipe. Pitch the condensate line downward a minimum of 1/2” for each 10' of horizontal run, away from the unit. Be sure to install the condensate drain “P” trap drain plug. Before starting the unit, fill the trap with water to prevent negative pressure in the fan section from impeding condensate flow.To facilitate drain pipe cleaning, install plugged tees in place of 90° elbows.

tional plug are provided for units with a waterside economizer.

1.Install the vent plugs in the economizer coil headers and condenser manifolds. These plugs ship in a bag with the condenser drain plugs.

Note: To prevent water pump damage,	Table I-MR-1. Water Connection Sizes.
design system piping to provide relief
	Unit Size	Direct Condenser	Factory Piped
when using energy saving waterside
	SXWG 20-35	1 1/2 NPT	2 1/2 NPT
economizer valves.

OUTIN

Figure I-MR-2. Direct condenser connections.

34 SCXG-SVX01B-EN