Pioneer PHR100-55, Instruction Manual

Page: 9 / 65

9
F. WINTERIZING
NOTE: Consider piping and installation when determining heater location. Do not place the heater in an
area where it will be prone to freezing.
To winterize the heater, drain the entire system. Pump two gallons of non-toxic, NSF food grade, FDA
rated GRAS (Generally Recognized As Safe) propylene glycol into the tank. Consult the glycol
manufacturer for specific instructions on concentration percentage as well as freeze and burst protection
methods. Check the concentration of antifreeze to assure protection is adequate to protect the bottom of
the heater from freezing.
PART 2 – BEFORE YOU START
A. WHAT’S IN THE BOX
Also included with the heater:
•
Pressure and Temperature Gauge
•
30 psi Temperature and Pressure Relief Valve
•
Intake PVC Tee with Screens
•
Exhaust PVC Coupling with Screens
•
Installation Manual
•
Warranty
•
Outdoor Sensor (Part # 7250P-319)
B. HOW THE HEATER OPERATES
Condensing Technology maximizes efficiency by measuring the needs of your heating system through
the use of sensors and a control unit. The heater uses data gathered by these sensors to intelligently
deliver highly efficient hydronic heating.
Heat Exchanger
The highly efficient combustion heat exchanger flows exhaust gas through the primary section into the
secondary heat exchanger section, where the coldest water on the bottom of the tank extracts the last
residual amount of energy.
Modulating Combustion System
Modulation during central heating operation is based on the supply temperature. The set point used for
the control depends upon the programmed central heating curve. The slope of the heating curve can be
changed by the heater installer. The control monitors the system, regulating burner output during
operation to match system demand, effectively increasing efficiency and providing substantial fuel
savings.
Gas Valve
The gas valve senses suction from the blower, allowing gas to flow only if combustion air is flowing.
Swirl Plate System
The Swirl Plate on the gas valve controls air and gas flow into the burner, assuring better mixing for
improved combustion.
Combination Top High Temperature Sensor
This sensor monitors supply temperature. The control module adjusts heater firing rate, correcting supply
temperature.