Use and Care Manual

NOTES:

1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes.

2. This Rheem Combi Boiler can control the operation of an Air Handler when a thermistor is used in combination with the Air Handler.

3. The minimum pipe size of DHW piping should be 3/4" diameter and CH piping should be 1" diameter.

4. Unit is equipped with built-in primary pump for the Air Handler. This pump is sized to ensure proper ow rate through the appliance heat exchanger

and related to Air Handler. On long pipe runs, it is recommended to keep the pump at maximum speed (setting 3).

5. The Air Handler function is designed to stop the Air Handler’s pump and fan operation when the Combi Boiler's heating function

is not operating due to DHW operation, Combi Boiler errors or Low Water in the Combi Boiler.

6. The Air Handler turns off when the following conditions arise:

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Thermistor open or short.

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The Combi Boiler is supplying DHW, or it is in stand-by for DHW mode.

ㆍ

The Combi Boiler is turned off.

7. Make-up water (Auto feed mode) is in progress.

8. In order to set up the Air Handler, from Installer Mode 8:AH mode should be activated.

Figure 22 – CH Piping with Air Handler

Air Handler Piping.

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