Filling The Boiler System; Exalt Combi Water Heater - Water Requirements; Filling The Domestic Circuit; Check Low Water Cut-Off Device - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 10 - START-UP PREPARATION

10.2. Filling the Boiler System

1. Close the boiler drain valve located on the bottom
of the unit and any manual or automatic air vents
in the system.
2. Open all system isolation valves.
3. Fill the boiler system to correct system pressure.
Correct pressure will vary with each application.
NOTICE
Typical residential system fill pressure is 12 psi.
System pressure will increase as system temperature
increases. Operating pressure of the system should
never exceed 30 psi.
4. Purge air and sediment in each zone of the boiler
system through the purge valve. Open air vents to
allow air to be purged from the zones.
5. Once the system is completely filled and purged of
all air and sediment, check the system pressure and
check/repair any leaks.
WARNING
Unrepaired system leaks will cause continual
makeup water to be added to the boiler. Continu-
al makeup water will cause mineral buildup with-
in the heat exchanger, reducing the heat transfer,
causing heat buildup and eventual heat exchang-
er failure. This can result in substantial property
damage, serious injury, or death.
10.3. EXALT Combi Water Heater - Water Re-
quirements
NOTICE
The thermostatic mixing valve controls the
hot water temperature delivered to the faucets.
WARNING
POTENTIAL SCALD HAZARD. A mixing valve
must be installed on the EXALT Combi. Removal
or adjustment of the mixing valve will create a
potential scald hazard, which can result in serious
injury, or death.
If any adjustment needs to be made to the valve's
temperature setpoint refer to the manufacturer's
instructions included with the valve.
General Notes
• Household water usage patterns will affect water
temperature at any faucet or shower. Occasionally
check temperature at each point of use, then
adjust the mixing valve setting accordingly. Always
recheck temperature after adjusting the mixing
valve.
• Lowering the automatic mixing valve as indicated
in these instructions will reduce water temperature
levels. Consult your installer or service technician.

10.3.1 Filling the Domestic Circuit

CAUTION
• Never use the EXALT Combi unless the circuits
of the water heater are completely filled with
water.
• Failure to comply with these instructions can
result in minor property damage, or injury.
1. Close domestic water drain valve.
2. Open domestic water isolation valves slowly on the
water heater piping.
CAUTION
Make sure to open the domestic isolation valve
slowly to prevent any damage to the domestic
circuit flow sensor.
3. Vent air from domestic circuit by opening nearest
hot water faucet, until there is a constant flow of
water.
4. Close hot water faucet.

10.4. Check Low Water Cut-Off Device

• The EXALT is provided with a factory installed
LWCO device that monitors system pressure.
• Access the Boiler Information Menu by following
instructions in Section 9.14 on page 61. Scroll
down to see the current system pressure and verify
it is within the range given in Section 10.2 above.
69