Carrier 58HDV Final Gas Piping Check, Power Supply Wiring, Junction Box J- Box Relocation

1.11″ (28.2mm)

Measure from face of ori- fice to the back side of the manifold.

ELECTRICAL WIRING

1.21″ (30.8mm)

A07725

Fig. 39 - Changing Orifices

5.Reinstall manifold. Ensure burners do NOT bind on new orifices.

Final Gas Piping Check

1.The furnace and the equipment shut off valve must be disconnected from the gas supply piping system during any

pressure testing of that system at test pressures in excess of 1/2″ PSIG. Close the manual shut-off valve before testing at such pressures.

2.The furnace must be isolated from the gas supply system by closing the equipment shut off valve during any pressure

testing of the gas supply system at test pressure equal to or less than 1/2″ PSI.

3.When installation is complete, test all pipe connections for leaks with the gas pressure less than 1/2″ PSIG to the gas valve.

4.Apply a commercial soap solution to all joints to test for leaks. Correct any leaks indicated by bubbles.

5.Correct even the smallest leak at once.

6.Check for leaks at gas valve and orifice connections to the burner manifold along with the pilot tube connections to the valve and pilot assembly while the furnace is operating.

!WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion could result causing property damage, personal injury and/or loss of life.

!AVERTISSEMENT

RISQUE D‘INDENDIE OU D‘EXPLOSION

Le non-respect des avertissements de sécurité pourrait d‘entrainer des blessures graves, la mort ou des dommages matériels.

Ne jamais utiliser une flamme nue por vérifier la présence des fuites de gaz. Pour la vérification de tous les joints, utiliser plutôt une solution savonneuse commerciale fabriquée spécifiquement pur la détection des fuites de gaz. Un incendie ou une explosion peut entrainer des dommages matériels, des blessures ou la mort.

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Turn OFF electrical power at fuse box or service panel before making any electrical connections and ensure a proper ground connection is made before connecting line voltage.

Power Supply Wiring

The furnace MUST be electrically wired and grounded in accordance with local codes, or in the absence of local codes with the latest edition of The National Electric Code, ANSI NFPA 70 and/or The Canadian Electric Code CSA C22.1.

Field wiring connections must be made inside the furnace connection box. A suitable strain relief should be used at the point the wires exit the furnace casing.

NOTE: Furnace will not have normal operation is line polarity is reversed. Check ALL field and control connections prior to operation.

Copper conductors shall be used. Line voltage wires should conform to temperature limitation of 35° C rise and be sized for the unit maximum amps stated on the rating plate. Add the full load amps for potential field-installed accessories such as electronic air cleaners and humidifiers that would receive power from the furnace control board. The furnace control board is rated for a maximum of

1.0amps combined for EAC and HUM. Consult NEC or local codes for proper wire and circuit sizing.

Junction Box (J- Box) Relocation

The J-Box is installed on left side of casing. An alternate J-Box location on right side can be used.

1.Remove bag containing two hole plugs and two self tapping screws from loose parts bag in blower compartment.

2.Remove two screws holding J-Box to casing.

3.Install large hole plug from loose furnace accessory bag into the left J-Box location.

4.Clip wire tie holding J-Box wires.

5.Move J-Box to alternate location and attach using two self tapping screws from bag.

6.Apply two hole plugs from bag at left J-Box location.

Thermostat

Heating

The two-stage furnace control board will operate with either a single stage or a two-stage heating thermostat and will provide two-stage heating operation.

For single-stagethermostat installations, the R and W wires from the thermostat connect to the R and W1 connections on the furnace control board. (See Fig. 40and wiring diagram)

NOTE: The TT (Thermostat Type) SW1 DIP switch #3 should be in the OFF position for the furnace to operate properly with a single-stage thermostat. Failure to change DIP switch with single-stage thermostat will result in Low Heat operation ONLY.

During operation, the furnace will operate on Low Heat for up to12 minutes. If the heat request exists for more than 12 minutes, the furnace will automatically shift to the High Heat mode for the remaining duration of the heating cycle.

58HDV

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