Carrier WeatherMaker 48TC Series Installation Instructions Manual

Contents

27Fig. 30 — Condensate Drain Pan ConnectionThe piping for the condensate drain and external trap can be com-pleted after the unit is in place. Hand tighten fittings to the drainpan fitting. Provide adequate support for the drain line. Failure todo so can result in damage to the drain pan. See Fig. 31.Fig. 31 — Condensate Drain Piping DetailsAll units must have an external trap for condensate drainage. In-stall a trap at least 4-in. (102 mm) deep and protect againstfreeze-up. If drain line is installed downstream from the externaltrap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in3 m) of run. Do not use a pipe size smaller than the unit connec-tion (3/4-in.).Step 11 — Make Electrical ConnectionsNOTE: Field-supplied wiring shall conform with the limitationsof minimum 63°F (33°C) rise.FIELD POWER SUPPLYIf equipped with optional powered convenience outlet: the powersource leads to the convenience outlet’s transformer primary arenot factory connected. Installer must connect these leads accord-ing to required operation of the convenience outlet. If an always-energized convenience outlet operation is desired, connect thesource leads to the line side of the unit-mounted disconnect.(Check with local codes to ensure this method is acceptable inyour area.) If a de-energize via unit disconnect switch operation ofthe convenience outlet is desired, connect the source leads to theload side of the unit disconnect. On a unit without a unit-mounteddisconnect, connect the source leads to the line side with unit fieldpower leads. See Fig. 32.Fig. 32 — Location of TB1Field power wires are connected to the unit at line-side pressurelugs on the terminal block (see wiring diagram label for controlbox component arrangement) or at factory-installed option non-fused disconnect switch. Use copper conductors only. See Fig. 33.NOTE: Make field power connections directly to line connectionpressure lugs only.Fig. 33 — Disconnect Switch and UnitWARNINGFailure to follow this warning could result in personal injury ordeath.Do not use gas piping as an electrical ground.Unit cabinet must have an uninterrupted, unbroken electricalground to minimize the possibility of personal injury if anelectrical fault should occur. This ground may consist of elec-trical wire connected to unit ground lug in control compart-ment, or conduit approved for electrical ground when installedin accordance with NEC (National Electrical Code); ANSI/NFPA 70, latest edition (in Canada, Canadian Electrical CodeCSA [Canadian Standards Association] C22.1), and local elec-trical codes.CONDENSATEDRAINCONNECTIONNOTE: Trap should be deep enough to offset maximum unit staticdifference. A 4-in. (102 mm) trap is recommended.MINIMUM PITCH1˝ (25 mm) PER10´ (3 m) OF LINE BASE RAILOPENVENTTO ROOFDRAINDRAIN PLUGROOFCURBSEE NOTE3˝ (76 mm)MINWARNINGFIRE HAZARDFailure to follow this warning could result in personal injury,death, or property damage.Do not connect aluminum wire between disconnect switch andunit. Use only copper wire.LOADSIDESEEDETAIL ADETAIL ALINESIDEBLKYELBLUCONTROL BOXL3L2L1COPPERWIRE ONLYELECTRICDISCONNECTSWITCHALUMINUMWIRE