INSTALLATION – CONTROLLERS
The Rheem 874 and 876 series can be installed with Rheem controllers to enable the user to control the
temperature of the delivered water from the outlet of the water heater.
There are two families of Rheem controllers suitable for installation with this water heater. These are the
standard controllers and the Deluxe controllers.
There are three types of standard controller. They are the Kitchen controller (Rheem PN 299853),
Bathroom1 controller (Rheem PN 299854) and the Bathroom2 controller (Rheem PN 299855).
The standard controllers are suitable for use on all 874 and 876 series models.
The standard controllers are identified by a ‘K’ (Kitchen controller), ‘B1’ (Bathroom1 controller) or ‘B2’
(Bathroom2 controller) located on the front bottom left hand corner of the standard controller.
There are three types of Deluxe controller. They are the Kitchen Deluxe controller (Rheem PN 299861),
Bathroom1 Deluxe controller (Rheem PN 299862) and the Bathroom2 Deluxe controller (Rheem
The Deluxe controllers are suitable for use on all 874 and 876 series models.
The Deluxe controllers are identified by a ‘K’ (Kitchen Deluxe controller), ‘B1’ (Bathroom1 Deluxe controller)
or ‘B2’ (Bathroom2 Deluxe controller), located under the front panel, to the bottom left hand corner adjacent
to the BATH FILL VOLUME label.
The standard and Deluxe controllers are designed to be hard wired into the water heater using either the
Kitchen controller cable (Rheem PN 299856) or the Bathroom controller cable (Rheem PN 299857).
Where more than one controller is installed, the second or third controller must be of the same family.
A standard controller can only be installed with another standard controller(s) and a Deluxe controller
can only be installed with another Deluxe controller(s). A standard controller(s) and a Deluxe
controller(s) cannot be connected to the same water heater.
One, two or three controllers can be installed. Only one of each type of controller can be connected to
the water heater. Therefore, a maximum of three controllers only can be connected to each water
A Bathroom2 controller can only be installed if a Bathroom1 controller is installed and a Bathroom2
Deluxe controller can only be installed if a Bathroom1 Deluxe controller is installed.
An additional Kitchen controller cable or Bathroom controller cable can be used if an extension of the
cable length is required.
It will be necessary to cut an opposite end off both cables to be installed in order to wire them together.
Alternatively, the cables may be extended using two-core flex with a minimum cross-sectional area of
Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as
an in-series gas booster with a solar water heater system because water at a temperature much higher than
the controller setting can be delivered. If a solar water heater is installed to an existing water heater
installation, then all controllers must be disconnected and removed.