Magikist HWG20, Instruction Manual

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1.0  INTRODUCTION

The HWG20 and HWG40 are steel coil type
instantaneous hot water heaters suitable for any low or
high pressure application requiring fast recovery. They
are most suitable for high pressure wash systems
where the high pressure water from the pump may be
fed through the heater, thereby producing hot water
while only cold water is run through the pump. They
may also be used in combination with an insulated
storage tank for a low pressure hot water system.

The durable stainless steel shell of the HWG20 and
HWG40 withstands years of use and will not rust. Both
models are available with either electronic ignition
(HSI) or standing pilot. An automatic vent damper is
available as an option from the factory to save energy
and protect the heater coil from freezing conditions. In
addition, a power venter is available as an option for
sidewall venting of the heater.

The operation of the heater is controlled and monitored
by the

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industrial heater control, an

advanced microcontroller that monitors several

aspects of the heater operation in order to provide safe
and effective control of the heater. The 

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AFE

II

control provides visual status to the operator of the
heater through a front panel display on the heater.
Should some condition arise which results in the
heater exceeding its normal operating temperature, the

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control provides overheat lockout

protection, thus protecting the heater and operator
from the dangers of a heater overheat condition. The

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AFE

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control also provides coil protection via a

coil freeze warning should the temperature in the flue
ever drop near the freezing point. The ProSafe

II

control will effectively and safely control the optional
automatic vent damper, eliminating open/close cycling
while still providing maximum coil protection and
energy savings. The 

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control will also

directly control the optional power venter without
requiring any additional timers or controls. An
electronic sensor with digital display of the current
water temperature is utilized to provide precise control
of the outlet water temperature.

For future reference when ordering parts or requesting
service information, please take a moment to record
your heater model number and serial number which
can be found on the certification plate mounted on the
front of the heater.

Model#

Serial#