Carrier 59SC5B Installation, Start-up, Operating And Service And Maintenance Instructions

Also see for 59SC5B: Product data

17CONDENSATE DRAIN CONNECTIONFROZEN AND BURST WATER PIPE HAZARDFailure to protect against the risk of freezing may result inproperty damage.Special precautions MUST be made if installing furnace in anarea which may drop below freezing. This can cause improperoperation or damage to equipment. If furnace environmenthas the potential of freezing, the drain trap and drain line mustbe protected. The use of accessory drain trap heaters, electricheat tape and/or RV antifreeze is required for theseinstallations.CAUTION!PROPERTY DAMAGE HAZARDFailure to follow this caution may result in burst water pipesand/or property damage.If a condensate pump is installed, a plugged condensate drainor a failed pump may cause the furnace to shut down. Do notleave the home unattended during freezing weather withoutturning off water supply and draining water pipes or otherwiseprotecting against the risk of frozen pipes.CAUTION!DO NOT trap the drain line in any other location than at thecondensate drain trap supplied with the furnace. If possible, DONOT route the drain line where it may freeze. The drain line mustterminate at an inside drain to prevent freezing of the condensateand possible property damage.Special precautions MUST be made if installing furnace in an areawhich may drop below 32_ F (0_ C). This can cause improperoperation or damage to the equipment. If the furnace environmenthas the potential of freezing, the drain trap and drain line must beprotected. In areas where the temperature may be below 32_ F (0_C), a Condensate Freeze Protection kit is required. The kitincludes a condensate trap with heat pad and replaces thefactory--installed condensate trap. Refer to the Accessory sectionof the Product Data for current kit number. A self--regulating,shielded and waterproof heat tape rated at 3 to 6 watt per foot (10to 20 watt per meter) at 115 volt, 40_F (4_C) may be used toprovide freeze protection of the remaining condensate drain line.Wrap the drain trap and drain line with the heat tape and securewith appropriate plastic ties. Follow the heat tape manufacturer’srecommendations. Prime the trap before furnace operation.The condensate drain line must be supported and/or secured perlocal codes. Supports and clamps should be spaced to prevent thedrain line from sagging or being dislocated from the furnace ortermination point. In the absence of local codes, consult the currentedition of the National Standard Plumbing Code, in the U.S. or theNational Plumbing Code of Canada in Canada.Upflow/Downflow OrientationIn the Upflow or Downflow orientation, the condensate trap isinside the furnace casing. The condensate drain must be routedfrom the trap through the furnace casing. The condensate drain canbe routed through the left or right side of the casing. (The left orright side is as you are viewing/facing the furnace from the front.)An indoor coil condensate drain or humidifier drain can beconnected to the external furnace condensate drain provided:a. The drains are not hard piped together, andb. There is an air gap at the point where the two drain linesmeet orc. All condensate piping is at least 3/4-in. PVC and there isa relief tee at the top of condensate drain piping as shownin Fig. 18.NOTE: On narrower casings, it may be easier to remove thecondensate trap, connect the drain line components and re-installthe condensate trap. Read the steps thoroughly to familiarizeyourself with the required steps.For Right Side Condensate Drain:1. Remove the 7/8--in. knock--out from the right side of thecasing. See Fig. 16 for suggested knockout removal tech-nique.2. Remove the pre--formed rubber drain elbow and two springclamps from the loose parts bag.3. Slide a spring clamp 1--inch (25 mm) down the plain end(the end without the formed grommet) of the drain elbow.4. From inside the casing, insert the formed grommet end ofthe elbow through the 7/8--in. knockout in the casing.5. Pull the grommet through the casing from the outside untilit is seated in the knockout6. Attach the plain end of the drain elbow to the outlet stub onthe drain trap. Secure the drain elbow to the trap with thespring clamp.The remaining drain line can be constructed from field supplied1/2--in. CPVC or 3/4--in. PVC pipe, in compliance with localbuilding codes. A factory--supplied 1/2--in. CPVC to 3/4--in. PVCadapter is supplied in the loose parts bag for use as required.7. Install the adapter or connect the 1/2--in. CPVC pipe bysliding a spring clamp over the open end of the grommet onthe outside the furnace casing.8. Open the spring clamp and insert the long end of theadapter or the 1/2--in. CPVC pipe into the outlet stub on thedrain tube.9. Connect additional condensate piping to a code--approveddrain, or to a condensate pump approved for use with acidicfurnace condensate and compatible with mineral andvegetable oils, such as canola oil.Allow at least 1/4-in. per foot (20 mm per meter) of slope downand away from the furnace in horizontal sections of drain line.TIP FROM CONTRACTORS: Contractors have found thattemporarily removing the inducer assembly in upflow applicationswhile performing the steps, below, makes upflow left--side drainconnections easier.For Left Side Condensate Drain Connection:1. For left side condensate drainage, the drain line is routedfrom the condensate trap, behind the inducer (upflow) orgas valve (downflow) and out through the left side of thefurnace casing. A pre-formed 1/2--in. CPVC “Z-pipe” isprovided with the furnace. The Z-pipe is long enough toextend across the casing for drain connections.2. Locate the Z-pipe. Remove the pre-formed drain elbow andfour spring clamps from the loose parts bag.3. The Z-pipe is connected to the condensate trap and theoutside of the furnace by modifying the formed rubberdrain elbow as shown in Fig. 13.4. Remove the formed grommet from the rubber drain elbowby cutting the elbow along the vertical line located about1--3/8 in. (35 mm) away from the formed grommet. See Fig.13. DO NOT DISCARD THE FORMED GROMMETOR THE RUBBER ELBOW. Both of these pieces will beused.Assemble and route the drain line to the opposite side of thefurnace as detailed below:5. Remove the knock-out from the left side of the casing. SeeFig. 16 for suggested knockout removal technique.