Multiple Boilers; Boiler/Plumbing Kit Placement; Installation Requirements - Electro Industries EB-MA-10 User Manual

MULTIPLE BOILERS

This boiler series now includes a method for automatically staging any
number of parallel-plumbed boilers. Order plug-in relay EB-C-STG5.
The thermostat is connected only to the first boiler, when all stages are
on for more than 5 minutes, this new plug-in relay module turns on the
next boiler (R and W), and a second EB-C-STG5 could be used to turn
on the third, etc.

BOILER/PLUMBING KIT PLACEMENT

This model series is wall hung and the vessel must be vertical, drawing BX505.
The plumbing kit items are located adjacent to the boiler housing itself as shown on drawing BX505.
For future servicing, the unit itself must be installed 20" or more above the floor, the elements are
screwed in from the bottom.
INFORMATION/WATER FLOW CALCULATIONS
Water flow, GPM, can easily be calculated if the temperature rise across the electric boiler can be
measured.
The formula below can only be used when the temperature rise is stable and the boiler is not hi-limiting.
In other words, verify constant current draw and stable outlet temperatures for at least 15 minutes.
GPM = Volts x Amps x 3.4
500 x Temp. rise

INSTALLATION REQUIREMENTS

1. All installation work must be performed by trained, qualified contractors or technicians. Electro
Industries, Inc., sponsors installation and service schools to assist the installer. Visit our web site at
electromn.com for upcoming service schools.
WARNING
ALL ELECTRICAL WIRING MUST BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE
AND LOCAL ELECTRIC CODES, ORDINANCES, AND REGULATIONS.
WARNING
OBSERVE ELECTRIC POLARITY AND WIRING COLORS. FAILURE TO OBSERVE COULD
CAUSE ELECTRIC SHOCK AND/OR DAMAGE TO THE EQUIPMENT.
CAUTION
This unit can only be used for its intended design as described in this manual. Any internal
wiring changes, modifications to the circuit board, modifications or bypass of any controls, or
installation practices not according to the details of this manual will void the product warranty,
the CSA/us certification label, and manufacturer product liability. Electro Industries, Inc.,
cannot be held responsible for field modifications, incorrect installations, and conditions which
may bypass or compromise the built-in safety features and controls.
09/15/2014 4 BI5096