Whirlpool EDP/EDN warranty Electrical Connections, 4C. Water Quality and Treatment

Endurance Page 13

4C. Water Quality and Treatment

Water quality control is steadily increasing in importance in view of the use of modern regulation technology and the modern boiler designs used in central heating systems.

The life of a central heating boiler can be severely curtailed as a result of the formation of scale deposits and/or corrosion products. The formation of such deposits should be prevented wherever possible.

Continual water make-up is not permitted. A suitable water treatment should be used to

prevent excessive scale deposits in the boiler and corrosion in the system.

SECTION 5.

Electrical Connections

All electrical wiring must conform to local codes and/or the National Electric Code or Canadian Electrical Code, Part 1.

The unit must be electrically grounded in accordance with the requirements of the authority having jurisdiction or, in the absence of such requirement, with the National Electrical Code. ANS/NFPA No. 70 latest edition, or the CSA Standard C22.1 “Canadian Electrical Code, Part 1.”

Single pole switches, including those of safety control and protective devices must not be wired in a grounded line.

All electrical connections are made in the field wiring box which is located on the top of the appli- ance, behind the right hand side of the control pod.

NOTE: All internal electric components have been pre-wired. No attempt should be made to connect electric wires to any other location except the wiring box as described below.

1.Main power: Connect a fused 120 volt supply (15 amp) to the main power switch (see Figure 20) (hot leg is connected directly to switch). Neutral leg to white wire. Ground wire can be connected to the grounding screw in the box or on the switch.

2.For single zone installations: (If external pump is required, e.g., because of large system pressure drop) connect room thermostat wires to the red and white/red wires. Connect circulator (120 volt, 5 amps maximum) between the blue wire and the white wire (neutral) (see Figure 21).

3.Zone Valves and Thermostats: Install external 24 volt transformer of sufficient V.A. to power combined load of zone valves. Consult zone valve manufacturer’s instructions. Connect circulator (120 volt, 5 amp maximum) between the blue wire and the white wire (neutral) (see Figure 22).

ENDURANCE

FIELD WIRING BOX

Figure 20. Single Zone With Room Thermostat (internal pump provides system flow).

ENDURANCE

FIELD WIRING BOX

Figure 21. Single Zone with Added Circulator(s) and Room Thermostat(s).

Figure 22. Multiple Zones Utilizing Four Wire Zone Valves with (Dry) End Switches.