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Honeywell RA89A Hydronic Switch. This Hydronic Switch provides intermediate switching of a line voltage device from a low voltage controller. For Honeywell RA89A Hydronic Switch replacement, mount the relay in the same location as the old control. If this is a new installation, locate the relay vertically on a solid wall or partition as near as possible to the device to be controlled.
| Manufacturer: | Honeywell |
| Mpn # | RA89A |
| Weight | 1.00 lbs. |
