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Thank you for selecting the Raypak Y–Series Electronic Boiler Control. It is our sincere hope that you will enjoy its
outstanding design, ease of use and energy saving features.
INTRODUCTION
The Y-Series Electronic Boiler Control (controller) is a microprocessor-based energy management system designed to
control either single or multiple stage-fired boilers. Ideally suited for use in hydronic heating and domestic hot water
supply applications, the Y-Series has been engineered with the flexibility and raw power to tame the most demanding
control situations. Utilizing a state-of-the-art PID control algorithm, the Y-Series minimizes operating costs by maximiz-
ing energy efficiency.
CONCEPT OF OPERATION
This controller is an outdoor reset control that is perfect for managing hydronic heating systems. Two temperature
sensors are used to control system response. One sensor is used to monitor the outdoor temperature, the other sensor is
used to regulate the temperature of the system water. By varying the temperature of the heating medium in response to
changes in the outdoor temperature, the Y-Series provides the ultimate in personal comfort and efficiency of operation.
The Y-Series controller is also well adapted to domestic hot water supply duty. By disabling the outdoor reset function, the
Y-Series behaves as an energy-wise boiler sequencer. With the ability to control up to eight firing stages, and such
features as a revolutionary "First-On, First-Off" lead-lag protocol, the Y-Series redefines "controlability" in domestic
water applications.
The controller is equipped with an energy-saving warm weather shutdown capability. When the outdoor temperature
rises above an adjustable "Outdoor Cutoff Temperature," the system automatically transitions to a dormant state. This
prevents the system from wasting energy trying to heat a building that is already at a comfortable temperature. Once the
outside temperature has fallen to the point that the system requires heat input to maintain the building temperature, the Y-
Series is reactivated and will hold the system temperature at the required point.
The Y-Series can also be equipped with an optional clocked alternate setpoint package. The alternate setpoint allows
control operation at an independent setpoint temperature and can be used either for night setback or preoccupancy boost.
An electromechanical 7-day timer switches the control between regular and alternate setpoint modes and can be set at two
hour activation intervals. See the section on the optional clocked alternate setpoint for details.
OPTIONAL CONFIGURATIONS
Y-2B BASIC UNIT, NO OPTIONS
Y-3B BASIC UNIT PLUS DIGITAL DISPLAY
Y-4B BASIC UNIT PLUS NIGHT SETBACK OPTION
Y-5B BASIC UNIT PLUS NIGHT SETBACK AND DIGITAL DISPLAY OPTIONS
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PLEASE REGISTER
Before proceeding any further, please take a moment to complete the enclosed user registration form and mail a
copy to Raypak, Inc., Department Y–Series, 2151 Eastman Avenue, Oxnard, CA 93030