Rinnai E75CN - Manual (Page 42)

Installation & Servicing Instructions Rinnai E-Series
42
9 Starting up: Filling and de-aerating the boiler and installation
CAUTION
Observe the following rules of safety:
- All work on the unit must take place in a dry environment.
- Rinnai units may never be in operation without their housing, except in connection
with maintenance or adjustments (see Chapter 12 and 13).
- Never allow electrical or electronic components to come into contact with water.
NOTICE
Carry out the following tasks in connection with maintenance, etc. to an already-
installed unit:
-
Shut down all programs
- Close the gas shut off valve
- Shut off the power at the main power switch
- Close the service valves (system supply and return)
NOTICE
Take note of the following when maintenance or adjustments are needed:
- The unit must be able to function during these activities; for this reason, the unit’s
supply voltage, gas pressure and water pressure must be maintained. Ensure that
this is not a source of potential danger during these activities.
Following maintenance or other activities; always check the installation of all
parts through which gas flows (with bubble test using leak-search spray).
9.1 Requirements of the water system
Before filling the heating system, the complete system, including all zones, must be
thoroughly cleaned and flushed to remove sediment. Flush until clean water runs free
of sediment. Rinnai suggests using an approved system cleaner to flush the system,
but not the boiler. See the Rinnai Boiler Applications Manual for furtherinformation
and for a list of approved cleaners.
Approved antifreezes are Noble Noburst Aluminum, Rhomar RhoGard Aluminum Safe
Multi-Metal. Never use salt bedding exchangers, reverse osmosis, D.I., or distilled
water for filling the heating system.
Do not use petroleum-based cleaning or sealing compounds in the boiler
system. Damage of seals and gaskets in boiler and system could occur,
resulting in substantial property damage.
The central heating installation needs to be filled with potable water.
Use only potable water or approved glycol for filling the heating system.
When the water hardness of the filling water exceeds > 10.5 gpg (200 mg/L)
and the volume of the installation > 20L/kW (5.2 gallons/3,412 BTU) the water
has to be treated until below the maximum value of 10.5 gpg (200 mg/L).
The pH value of the installation water must be between 6.5 and 8.5.
Check the The pH value using a digital pH meter that has been properly calibrated
or by having the water analyzed by a water treatment company.
If pH differs from above, contact Rinnai engineering for further assistance.
Failure to adhere to the water quality requirements will result in a void of war-
ranty.
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