Carrier 48HJD005-007 specifications Adjust Factory-Installed Options, Flue Hood Details

Fig. 6 — Flue Hood Details

LEGEND

NFGC — National Fuel Gas Code *Field supplied.

NOTE: Follow all local codes.

SPACING OF SUPPORTS

STEEL PIPE	SPACING OF SUPPORTS
NOMINAL DIAMETER	X DIMENSION
(in.)	(ft)
1/2	6
3/4 or 1	8
11/4 or larger	10

Fig. 7 — Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

Install conduit through side panel openings indicated in Fig. 5. Route power lines through connector to terminal con- nections as shown in Fig. 8.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Tables 2A-2D). On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Tables 2A-2D, Note 2 to determine the percent voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invali- date any applicable Carrier warranty.

NOTE: If accessory thru-the-bottom connections and roof curb are used, refer to the Thru-the-Bottom Accessory Installation Instructions for information on power wiring and gas connec- tion piping. The power wiring, control wiring and gas piping can be routed through field-drilled holes in the basepan. The basepan is specially designed and dimpled for drilling the access connection holes.

FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to installation in- structions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense aver- age temperature in accordance with thermostat installation instructions.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to low- voltage connections (shown in Fig. 9).

Connect thermostat wires to matching screw terminals of low-voltage connection board. See Fig. 9.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Pass the control wires through the hole provided in the cor- ner post; then feed wires through the raceway built into the cor- ner post to the 24-v barrier located on the left side of the control box. See Fig. 10. The raceway provides the UL required clear- ance between high- and low-voltage wiring.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator set- tings at .14 amp for first stage and .14 for second stage heating, when available.

Step 8 — Adjust Factory-Installed Options

MOISTUREMISER DEHUMIDIFICATION PACKAGE — MoistureMiser package operation can be controlled by field installation of a Carrier-approved humidistat (Fig. 11). To install the humidistat:

1.Route humidistat cable through hole provided in unit cor- ner post.

2.Feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. See Fig. 10. The raceway provides the UL-required clearance between high- and low-voltage wiring.

3.Use a wire nut to connect humidistat cable into low- voltage wiring as shown in Fig. 12.

APOLLO CONTROL — The optional Apollo control is used to actively monitor all modes of operation as well as indoor (evaporator) fan status, filter status, and indoor-air quality. The Apollo control is designed to work with Carrier TEMP and VVT® systems.

The thermostat must be wired to the Apollo Control before starting the unit. Refer to the Apollo Control installation instructions for information on installing the thermostat.

DISCONNECT SWITCH — The optional disconnect switch is non-fused. The switch has the capability of being locked in place for safety purposes.

8