INTRODUCTION
Market Forge, in the interest of both costs and efficiency to the purchasers of its equipment, has designed these steam
generators with the latest type automatic controls in order to make it easier for the operator to use and maintain this
equipment. In addition, standard components are utilized on all models of steam generator equipment unless variances in
size or capacity dictate a divergence from this policy for more efficiency in operation. This parts and service manual is written
and illustrated to cover all steam generator equipment that uses electricity as a source of power other than those which have
been custom designed under special order.
HOW TO USE THIS MANUAL
The pictures of components are aids to the identification, disassembly and assembly of parts. The parts listings provide
information necessary for the ordering of replacement parts (proper part names and part numbers). When requesting parts or
service, always furnish the model and serial number of your complete unit, which will indicate to Market Forge Service
Division the type of steam generator with which you are equipped. This information can be found on the nameplate attached
to the steam generator frame.
THEORY OF OPERATION FOR ELECTRIC STEAM GENERATORS
Explanation of how the control system works on manual and automatic electric steam generators.
With the steam generator filled with water to its proper level and the fuel switch turned to its on position, the contactors will
pull in and permit the completion of the electric circuit to the heating elements. When the steam generator builds up to its set
pressure the pressure switch on the left side in the control box opens. This will open up the circuit to the coil in the contactor,
which in turn will drop out the contacts in the contactor and shut off the electricity. As the pressure in the steam generator
drops off, the pressure control switch will again come into operation and complete the circuit and build the steam generator
back up to its set pressure. When the operator wishes to stop all generation of steam he need only to place the fuel switch in
the off position.
Product Service Dept. Market Forge Co.
35 Garvey Street Telephone 617-387-4100