EZB-Eco Installation Manual
09/01/2020 9 BI601
9. Flow Switch– a flow switch is not included or factory required for the boiler. However, one can be
added to the LMC circuit. Simply place the field provided flow switch in series with this circuit.
NOTE: The L/W (J3) jumper must be in the W position.
WATER ADDITIVES/TREATMENT
Water treatment is strongly suggested to prevent scale deposits, corrosion from acids, oxygen, and other
harmful elements within the specific water supply. It is the installer or user’s responsibility to verify water
quality and maintain acceptable water quality throughout the life of this product.
As a minimum the following water properties must be considered:
Hardness (ppm): 0-10
pH: 7.5-10
Iron Content (ppm): 0-20
Oxygen Content (ppm): 0
Total Dissolved Solids: 0-5000
Up to a 50/50 propylene glycol mixture is acceptable for use in these boilers
WATER FILL PROCEDURE
The following procedure applies to non-glycol or antifreeze and prepackaged plumbing kit and/or when
the system is plumbed exactly as shown on drawing BX603.
CAUTION
If the building supply pressure is connected directly to supply water ball valve without pressure
reducing regulator, user needs to make sure the pressure within the boiler loop does not exceed 30
PSI. Careful control of the supply water ball valve opening can take care of this. Also at steps 6
and 10, use caution to make sure the building water supply pressure does not spike the system.
1. Do not apply 240/208-volt heating power during water fill sequence.
2. Connect the temporary household water supply source (probably hose connection) to the water
supply connection input.
NOTE: If water supply connection is permanent, some local building codes may require
special anti-siphon check valve, RPZ check valve, or equivalent between the boiler fill
regulator and the domestic water source or the city water connection.
3. Connect a drain hose to hose bib, drain valve.
4. Open drain valve and close ball valve (between drain valve and boiler). This will ensure water
flushes in one direction through the system.
5. Verify any hydronic manifold valves are open.
6. Open water supply valve and open household water supply source.
7. Allow water to circulate, discharging through drain valve, for at least 15 minutes.
8. Close both the inlet and drain valves.
9. Slowly open the inlet valve unit the cold system pressure at the gauge reads 12 to 20 PSI, then
close the valve.
10. Loosen the air bleed cap on top of the air eliminator.
11. Optional – to purge any remaining air in the system, energize the circulating pump by inserting a
jumper across the R-W terminals on the boiler control board. Temporarily removing the blue
jumper at the blue-blu/wht terminal will prevent elements from activating during this process.
Run pump for 30 minutes. If a significant amount of air is removed and the boiler pressure drops
below 10 PSI, slowly open the water inlet valve to build water pressure to 12 to 20 PSI.
12. Once the boiler pressure is stable, disconnect the water supply.
COMMENT: Purge one loop at a time.