Dunkirk H2OI Stainless Steel Dual Coil Solar Water Heaters - Manual (Page 18)

18
Solar Electric Tank
Electric Connections
Solar electric hot water heater includes 240 VAC thermostat and 3500 watt element.
See Schematic
Connect Electric Heating Element
Before any electrical connections are made, verify water heater is full of water and valve in cold water supply line is open.
Solar water heater is supplied with single electric heating element backup system. Thermostat incorporates manual reset
temperature-limiting device. Refer to "Troubleshooting Guide" section for manual reset operation. Turn off all power
related to heating system before proceeding with electrical connections. Any and all wiring shall be sized and installed to
satisfy voltage and amperage used. Water heater must be well grounded. Green ground screw is provided at electrical
connection point for connecting ground wire. All wiring shall be done in accordance with all applicable local and state
codes.
Adjusting Thermostat Temperature Dial
Minimum potable water temperature can be changed by adjusting thermostat. Before any work is done on water heater,
disconnect all power to the water heater and heat source (solar collector) by opening the switch(s) at main electrical
circuit breaker or fuse box. Remove cover and fold insulation outward away form control. Adjust thermostat dial using
screwdriver until minimum acceptable temperature is achieved. Rotate temperature dial clockwise to increase water
temperature. Rotate thermostat dial counter-clockwise to decrease temperature setting. See Figure 6 for temperature
settings.
Thermostat has been factory preset to 120°F (49°C). Remember lower temperature settings are more energy efficient.
Replace insulation make sure control is well covered and plastic terminal shield has not displaced. Replace access panel.
Water heater is now ready for operation.
FIGURE 9
N
Ground
unit per
local code
L