7Electrical connections
CAUTION
CAUTION
The electrical connections to the boiler must be made in accordance with all applicable local codes and the latest revision of the National Electrical Code,
Devices such as, outdoor sensor, room thermostat or temperature control, temperature sensor or thermostat and an external pump are all connected to the internal connection terminal. The connection terminal is situated behind the Control Tower.
Connecting incoming power
Install a 120V main switch next to the boiler as service main switch of the boiler. Lead the cable through the back part of the boiler using a strain relief and lead the cable through the cable supports to the Control Tower.
Connect a power supply cable to the cable harness terminal strip that connects to both the power switch on the front of the Control Tower and the terminal strip with positions 1, 2, and 3 on the inside of the Control Tower.
The boiler must be electrically grounded in accordance with local codes, or in absence of local codes, with the National Electrical Code, ANSI/INFPA 70 and/or the CSA C22.1, Electrical Code.
RISK OF ELECTRIC SHOCK.
Once the main power supply is on then there is 120V on terminals 1 to 12 if the main switch next to the boiler is switched on.
-No changes may be made to the wiring of the boiler;
-All connections should be designed in accordance with the applicable regulations;
i NOTICE | The Rinnai room thermostat and controls must be connected to their allocated |
| connections. All other types or makes of room thermostats or controls which |
| are used must have a Volt free contact. |
When using an on/off thermostat or control, it is possible that an anticipating resistance must be calibrated in order to prevent too high temperature fluctuations. As a standard rule this means mercury thermostats. This resistance wire is present in the Control Tower and must be connected to clamps 23 and 27. The anticipating resistance in the room thermostat has to be set at 0.11 A.
For more detailed questions regarding the components which are not supplied, the distributor should be contacted.
Connection terminal
120 V~ | 120 V~ |
| 120 V~ | 120 V~ |
| 8U352200 |
| Cylinder connection | Outside | Bus | Room | External | 24 V~ | ||
Power supply | External pump | Ext.controller | N | L | DHW | sensor | Controller | therm. | safety | 100 mA | |||||
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| N | L |
| CH | DHW N | sensor |
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| On / Off | contact |
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| 4 | 5 | 6 | 7 | 10 | 11 |
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main power supply | 120 Volts for | external pump |
| 120 Volts for external control | 120 Volts |
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| internal | ARV12 outdoor sensor | Bus room thermostat | On/off thermostat or control (Volt free) | External safety contact | 24 Volts maximum 100 mA | |
! CAUTION | CAUTION |
Make sure that the power consumption of each of the terminals | |
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Connection terminal | figure 19 |
Installation & Servicing Instructions Rinnai
37
