Carrier 58MVP Installation, Start-up, And Operating Instructions Manual

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Carrier 58MVP Installation, Start-up, And Operating Instructions Manual Manual pdf 30 page image

CONDENSATE DRAIN PROTECTIONFreezing condensate left in condensate trap and drain line maycause cracks, and possible water damage may occur. If freezeprotection is required, use condensate freeze protection accessoryor equivalent 3 to 6 watt per ft at 120v and 40°F self-regulating,shielded, and waterproof heat tape. See Installation Instructionssupplied with accessory or heat tape manufacturer’s recommenda-tions.1. Fold heat tape in half and wrap on itself 3 times.2. Locate heat tape between sides of condensate trap back. (SeeFig. 34.)3. Use wire ties to secure heat tape in place. Wire ties can bepositioned in notches of condensate trap sides. (See Fig. 34.)4. Wrap field drain pipe with remaining heat tape, approximately1 wrap per ft.5. When using field-supplied heat tape, follow heat tape manu-facturer’s instructions for all other installation guidelines.START-UP, ADJUSTMENTS AND SAFETY CHECKStep 1—General1. Furnace must have a 115-v power supply properly connectedand grounded.NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, control status indicator light flashes rapidlyand furnace does not operate.2. Thermostat wire connections at terminals R, W/W1, G, andY/Y2 must be made at 24-v terminal block on furnace control.3. Natural gas service pressure must not exceed 0.5 psig (14-in.wc), but must be no less than 0.16 psig (4.5-in. wc).4. Blower access panel must be in place to complete 115-velectrical circuit to furnace.Table 8—Maximum Allowable Exposed Vent Pipe Length (ft) With and Without Insulation in Winter DesignTemperature Ambient*FURNACESIZEWINTER DESIGNTEMPERATURE(°F)MAX PIPEDIAMETER(IN.)WITHOUTINSULATIONWITH 3/8–IN. ORTHICKER INSULATION†04020 1.5 51 700 1.5 28 70-20 1.5 16 7020 2 45 700 2 22 70-20 2 10 5806020 2 65 700 2 35 70-20 2 20 7008020 2 55 550 2 48 55-20 2 30 5520 2.5 70 700 2.5 47 70-20 2.5 28 7010020 2.5 40 400 2.5 40 40-20 2.5 38 4020 3 70 700 3 50 70-20 3 28 7012020 3 70 700 3 61 70-20 3 37 7020 4 70 700 4 48 70-20 4 23 70* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe lengthas specified in Table 8.† Insulation thickness based on R value of 3.5 per in.30