ICP N8MPN Installation Instructions Manual

Also see for C8MPL: User's information manual Installation instructions

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ICP N8MPN Installation Instructions Manual Manual pdf 23 page image

23441 01 2611 06Fan ControlThe fan control is preset at the factory with ON delay of 30 secondsin the heating mode. The blower OFF timing is preset at 140 sec-onds. If desired, the fan OFF delay can be reset to obtain the lon-gest delay times while still maintaining comfort levels. See“Furnace Wiring Diagram”.Control Center FuseThe 24V circuit contains a 5--amp, automotive--type fuse locatedon control center. (See Figure 20) Any electrical shorts of 24V wir-ing during installation, service, or maintenance may cause fuse toblow. If fuse replacement is required, use only a fuse of identicalsize (5 amp.).Fan Timer ConnectionsFigure 20DIP SwitchFUSE25--23--4110. Ductwork and Filter (Upflow/Horizontal)CARBON MONOXIDE POISONING HAZARD.Failure to properly seal duct could result in deathand/or personal injury.Do NOT draw return air from inside a closet or utilityroom where furnace is located. Return air ductMUST be sealed to furnace casing.! WARNINGDuct ConnectionsThis furnace may be installed in only a bottom or side return--airduct application. Return air duct connections through the back ofthe furnace is NOT permitted.Upflow ONLY: Side return--air duct connections can be made bycutting out the embossed area shown in Figure 21. A pluggedhole is provided at each furnace side duct location to help start cut-ting the opening. Side duct connections are NOT permitted in hori-zontal flow applications.Cutting Side Return Air OpeningFigure 21PluggedStartingHoleUpflow and Horizontal Flow: Bottom return--air duct connec-tions can be made by removing the knockout panel in the furnacebase. Do NOT remove knock-out except for a bottom return--airduct connection.Duct DesignDesign and install air distribution system to comply with Air Condi-tioning Contractors of America manuals or other approved meth-ods that conform to local codes and good trade practices.When the furnace is located in an area near or adjacent to the livingarea, the system should be carefully designed with returns to mini-mize noise transmission through the return air grille. Any blowermoving a high volume of air will produce audible noise, which couldbe objectionable when the furnace is located very close to a livingarea. It is often advisable to route the return air ducts under thefloor or through the attic. Refer to furnace Technical Support Manual (Blower Data)for air flow information. Size ductwork to handle air flow for heating (and air condition-ing if so equipped).Duct Installation Requirements When a furnace is installed so that supply ducts carry air cir-culated by the furnace to areas outside of the space contain-ing the furnace, the return air shall also be handled by duct(s)sealed to the furnace casing and terminating outside thespace containing the furnace.CARBON MONOXIDE POISONING HAZARD.Failure to follow safety warning exactly couldresult in serious injury, death, and/or propertydamage.Install cooling coil on furnace discharge. Cool airpassing over heat exchanger could cause conden-sate to form resulting in heat exchanger failure.! WARNING When the furnace is used with a cooling unit , the furnace shallbe installed parallel with or on the upstream side of the coolingunit to avoid condensation in the heating element. With a parallel flow arrangement, the dampers or other meansused to control flow of air shall be adequate to prevent chilledair from entering the furnace. Chilled air going through the fur-nace could cause condensation and shorten furnace life.Dampers (purchased locally) can be either automatic ormanual. Manually or automatically operated dampers MUSTbe equipped with a means to prevent furnace and air condi-tioning operation, unless damper is in the full heat or cool posi-tion.