Water Fill Procedure - Electro Industries EB-MS-10 Installation & Operating Instructions Manual

8. Remote Display – an optional remote display (4-wire stat cable) can be added, call factory for
details. Also requires main board upgrade, @EBSTW5623.
WATER ADDITIVES
1. Unless the source water is unusually poor and/or rust elements, additives are not required. It is
recommended the water source as shown on drawing BX505 comes through the household water
softener or use distilled water.
2. Impurities within a closed loop hydronics boiler are considerably less damaging than the typical
domestic water heater. In a closed loop electric boiler, the water impurities "boil out" and the
system essentially makes its own pure water. As a closed system, this "pure water" becomes the
operating mode. In the case of domestic water tank, there is always new water entering with new
impurities.
3. However, if additives are required, use the recommendations and source from your local
professional plumber, specializing in hydronics heating systems.

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 BX505.
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. 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, or equivalent between the boiler fill
regulator and the domestic water source or the city water connection.
2. Connect a drain hose to hose bib, "drain valve".
3. Open "drain valve" and close "inlet gate valve" (between drain valve and boiler inlet).
4. Verify "top gate valve" is open.
5. Do not apply 240 heating power during water fill sequence.
6. Open "water supply valve" and open household water supply source.
7. Allow system to circulate, discharging through drain valve, for at least 15 minutes.
8. Put your ear against the metal pipe and listen for air bubbles. If the water flow is consistent and
quiet, the system is probably purged and water filled.
9. Close the "drain valve". Open the "inlet gate valve".
10. The cold system pressure at the gauge should be approximately 10 to 14 PSI.
11. Close "water supply valve" and disconnect water supply.
12. Optional – energize circulating pump during this fill operation. The water pressure from the
household system and as plumbed should typically flow through the circulating pump without the
pump running.
COMMENT: Purge one loop at a time.
03/19/2009 9 BI508