Notice/avis – Carrier SINGLE PACKAGE ROOFTOP 48HC User Manual

Page 22

2.0

50HE501288

NOTICE/AVIS

Convenience Outlet Utilization

Maximum Intermittent Use 15 - Amps

Maximum Continuous Use 8 - Amps

Observe a 50% limit on the circuit

Loading above 8 - Amps

Utilisation de la prise utilitaire

Usage intermittent maximum 15 - Amps

Usage continu maximum 8 - Amps

Observez une limite de 50% sur le circuit

Chargement au-dessus de 8 - Amps

C10077

Fig. 29 -- Convenience Outlet Utilization Notice

Test the GFCI receptacle by pressing the TEST button on

the face of the receptacle to trip and open the receptacle.

Check for proper grounding wires and power line phasing

if the GFCI receptacle does not trip as required. Press the

RESET button to clear the tripped condition.

Using unit--mounted convenience outlets: Units with

unit--mounded convenience outlet circuits will often

require that two disconnects be opened to de--energize all

power to the unit. Treat all units as electrically energized

until the convenience outlet power is also checked and

de--energization is confirmed. Observe National Electrical

Code Article 210, Branch Circuits, for use of convenience

outlets.

Factory--Option Thru--Base Connections —

All units are equipped with the ability to bring utilities

through the base.

Gas is brought up through an embossed area located in the

gas section behind the gas entrance post. Access is gained

through the gas access panel. A knock out must be

removed to accomplish this.

The electrical entrance is located in the control box area

and can be accessed through the control box access panel.

An embossed area is provided with three knock outs. High

voltage is brought through the multi knock out by

removing the appropriate size for the size of the fitting

required. A

--in. knock out is provided for low voltage.

An additional

--in. knock out is provided for a 115 volt

line which is used when the unit is equipped with the

non--unit powered convenience outlet option.

All required fittings are field supplied. Install fittings

when access to both top and bottom of the base pan is

available. See electrical and gas connections for routing

and connection information.

Units without Thru--Base Connections —

1. Install liquid tight conduit between disconnect and

control box.

2. Pull correctly rated high voltage wires through the

conduit.

3. Install power lines to terminal connections as shown

in Fig. 25.

Field Control Wiring —

The 48HC unit requires an external temperature control

device. This device can be a thermostat (field--supplied)

or a PremierLink controller (available as factory--installed

option or as field--installed accessory, for use on a Carrier

Comfort Network or as a stand alone control) or the RTU

Open for Building Management Systems using non--CCN

protocols (RTU Open is available as a factory--installed

option only).

Thermostat —

Install a Carrier--approved accessory 2--stage thermostat

according to installation instructions included with the

accessory. Locate the thermostat accessory on a solid wall

in the conditioned space to sense average temperature in

accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24--v

power, use a thermostat cable or equivalent single leads of

different colors with minimum of seven leads. If the

thermostat does not require a 24--v source (no “C”

connection required), use a thermostat cable or equivalent

with minimum of six leads. Check the thermostat

installation instructions for additional features which

might require additional conductors in the cable.

For wire runs up to 50 ft. (15 m), use no. 18 AWG

(American Wire Gage) insulated wire (35_C minimum).

For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated

wire (35_C minimum). For over 75 ft. (23 m), use no. 14

AWG insulated wire (35_C minimum). All wire sizes

larger than no. 18 AWG cannot be directly connected to

the thermostat and will require a junction box and splice

at the thermostat.

Unit without Thru--Base Connection Kit —

Correctly rated low voltage wire can be routed through the

rubber grommet located on the corner post adjacent to the

control box access panel. Route wire through the grommet

and then route the wire behind the corner post utilizing the

factory provided wire ties secured to the control box. This

will insure separation of the field low voltage wire and the

high voltage circuit. Route the low voltage wire to the

central terminal board. See Fig. 30.

48H