Crown Aruba 5 Installation Manual

WARNING

• ALL WIRING AND GROUNDING MUST BE DONE IN ACCORDANCE WITH

THE AUTHORITY HAVING JURISDICTION OR, IN THE ABSENCE OF SUCH

REQUIREMENTS, WITH THE

NATIONAL ELECTRICAL CODE (ANSI/NFPA 70).

• DISCONNECT ELECTRICAL POWER TO THE BOILER AND HEATING SYSTEM

BEFORE SERVICING. POSITIVELY ASSURE THAT NO VOLTAGE IS PRESENT.

LOCK ELECTRICAL BOXES TO PREVENT SOMEONE FROM INADVERTENTLY

RESTORING POWER BEFORE THE HEATING SYSTEM IS SAFE TO OPERATE.

• NEVER DEFEAT OR JUMP OUT SAFETY DEVICES.

• PROTECT EACH BOILER CIRCUIT WITH A PROPERLY SIZED OVER-CURRENT

PROTECTION DEVICE.

• MAKE ELECTRICAL CONNECTIONS CAREFULLY ACCORDING TO THE BOILER’S

WIRING DIAGRAM AND INSTRUCTIONS.

• WIRE ADDITIONAL FIELD SUPPLIED SAFETY LIMITS, SUCH AS LOW WATER

CUTOFFS AND TEMPERATURE LIMIT DEVICES, IN SERIES WITH THE 120V

CIRCUIT USED TO POWER THE BOILER. DO NOT ALTER THE BOILER’S

FACTORY WIRING WHEN ADDING AN ADDITIONAL LIMIT DEVICE.

1) Line Voltage (120 VAC) Field Connections – See Figure 9.0 for line voltage connections. Provide a dedicated circuit for the

boiler of 15A or greater. A service switch is recommended and is required by many local codes. Locate this switch in accor-

dance with local codes or, in the absence of any, in a location where it can be safely accessed in an emergency involving the

boiler. All 120VAC connections to the boiler itself are made inside the junction box on the right side of the boiler (accessible

through the cover plate on the right side jacket panel). 120VAC connections are:

• Ground

• 120VAC Hot (Black)

• 120VAC Neutral (White)

• Heating Circulator Hot (Red)

• Heating Circulator Neutral (White)

• DHW Circulator Hot (Blue)

• DHW Circulator Neutral (White)

The use of the Circulator outputs are as follows (also refer to the Piping Section)

a) Heating Circulator - Pumps water upon a call for heat (CH) from the thermostat terminals T-T shown in Figure 9.1 or

from an EnviraCom thermostat. This output is factory wired to the “circulator whip” mounted on the boiler.

b) DHW Circulator - Pumps boiler water to an indirect water heater upon a call for domestic hot water (DHW) from the

DHW thermostat terminals shown in Figure 9.1. This output can also be used for a second space heating zone. See Sec-

tion XI of this manual for additional information.

Maximum circulator current draw is 5.0 FLA.

IX Wiring