V. Electrical

DANGER

Positively assure all electrical connections are unpowered before attempting installation or service of electrical components or connections of the boiler or building. Lock out all electrical boxes with padlock once power is turned off.

WARNING

Failure to properly wire electrical connections to the boiler may result in serious physical harm.

Electrical power may be from more than one source. Make sure all power is off before attempting any electrical work.

Each boiler must be protected with a properly sized fused disconnect.

Never jump out or make inoperative any safety or operating controls.

The wiring diagrams contained in this manual are for reference purposes only. Refer to the wiring diagram of any controls used with the boiler. Read, understand and follow all wiring instructions supplied with the controls.

A. General

1.Install wiring and electrically ground boiler in accordance with requirements of the authority having jurisdiction, or in absence of such requirements the National Electrical Code, ANSI/ NFPA 70, and/or the CSA C22.1 Electric Code.

2.A separate electrical circuit must be run from the main electrical service with an over-current device/disconnect in the circuit. A service switch is recommended and may be required by some local jurisdictions.

3.Wiring should conform to Figure 13 and/or 14.

B. System Controls and Wiring

1.Refer to National Electric Code or Local Electric Codes for proper size and type of wire required. Follow Code.

2.Use anti-short bushings on all wiring passing through boiler jacket, junction boxes and/or control boxes.

3.Use armored cable (BX) over all exposed line voltage wiring.

4.If an Alliance indirect water heater is used, use priority zoning. Do not use priority zoning for Hydro-Air Systems.

5.Single Zone System – Refer to Figure 13 or 14 of this manual for the electrical diagram for this type of system. Connect the system circulator wire leads to the proper locations on the Aquastat control, L7224C/L7248C.

Connect the thermostat to the ‘T-T’ terminals on the L7224C/L7248C control. Set thermostat heat anticipator settings to 0.60 amps.

6.Conventional Circulator Zoned System – Refer to Figure 15 for the electrical diagram for this type of system.

Read, understand and follow all of the instructions provided with the Honeywell R8888 control.

7.Conventional Zone Valve Zoned System – Refer to Figure 16. Wiring to the most popular models of zone valves are given in Figure 17.

Locate C1 and C2 inside the L7224C Honeywell control. Connect the two (2) terminals to the system circulator wire leads, supplied with boiler.

Connect the H1 and H2 terminals inside the R8889 to the ‘T-T’ terminals in the L7224C Honeywell Control. Refer to Figure 16.

Connect the thermostat of each zone and the circulator for that zone to R8889 panel. If an Alliance indirect water heater is used, connect the Alliance thermostat and circulator to the Zone 1 terminals of the R8889. Set thermostat anticipator settings to 0.12 amps.

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Burnham RSA manual Electrical, General
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RSA specifications

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