EZB-Eco Installation Manual

09/01/2020 1 BI601
INTRODUCTION
The EZB-Eco has been designed to be the complete system package for radiant heat applications.
When properly sized, the EZB-Eco will provide the needed hot water to properly heat a space in a single
zone or multiple zone application. With its unique WarmFlo technology, the EZB-Eco can easily
modulate output based on the level of demand from a single or multi-zone system. Proper design of the
radiant system is required to assure minimum required water flow (GPM) through the boiler.
BOILER CONTROL
The EZB-Eco can be operated with a single thermostat or multiple thermostats connected to the R-W
terminal. It can also be controlled through an Electro zone control board or other brand zone controller.
Do not jumper the R-W terminals for hot boiler application. This can cause unpredictable results and
possible high limit lockout of the boiler elements resulting in no heat output.
The EZB-Eco can be used in dual heat/dual fuel applications. Existing components should be evaluated
for removal as the EZB-Eco contains components that can be used by both systems. If you are
considering adding an electric boiler to relatively new existing gas boiler system, contact the factory for
additional information.
NOTE: This model series is designed and equipped for 240-volt residential, single phase. If this unit is
used on 208-volt, energy capacity is reduced by approximately 25%. The installed transformer has a
primary tap for 208-volt. Rewire the internal transformer so the boiler is using this primary tap for 208-
volt applications.
APPROVED TUBING/PIPING
When plumbing this boiler and its peripheral parts to the loop system, all plumbing parts and/or tubing
must be sealed to prevent entrance of oxygen.
Use only tubing or polyethylene tubing with oxygen Diffusion Barrier.
SYSTEM OR WATER FLOW
In order to prevent hi-limiting and assure full 20+ years parts life, the piping system/basic
plumbing/circulator pump must be arranged to provide flow greater than minimum GPM shown in Table
1 below. If zoned system, this applies when the smallest zone is operating.
TABLE 1 - ELECTRO-BOILER SPECIFICATION
Model Volts Phase Watts Btu/h Amps CB
GPM
MIN
EZB-T1-05-240-1 240/208 1-60 Hz 5,000/3,500 17,060/12,795 21.8A/18A 30A 1.0
EZB-T1-07-240-1 240/208 1-60 Hz 7,000/5,300 23,885/17,913 29A/25A 45A 1.0
EZB-T1-10-240-1 240/208 1-60 Hz 10,000/7,500 34,121/25,591 42A/36A 60A, 2.0
EZB-T1-12-240-1 240/208 1-60 Hz 11,500/8,600 39,239/29,429 48A/41.5A 60A, 2.0
EZB-T1-15-240-1 240/208 1-60 Hz 15,000/11,300 51,182/38,386 62.6A/54A 30A +60A, 2.0
EZB-T1-17-240-1 240/208 1-60 Hz 17,500/13,100 59,712/44784 73A/63A 45A+60A 2.0
EZB-T1-20-240-1 240/208 1-60 Hz 20,000/15,000 68,242/51,182 83A/72A 60A+60A 2.0
Circulating Pump, all boiler models 120V 60 Hz 0.54 Amps 10A CB