installation, operating and service instructions eva series boiler

4. Install drain valve in fitting provided at bottom rear
of the boiler.
5. If this boiler is used in connection with refrigeration
systems, the boiler must be installed so that the
chilled medium is piped in parallel with the boiler
using appropriate valves to prevent the chilled
medium from entering the boiler. Also consult
I=B=R Installation and Piping Guides. If this boiler
is connected to heating coils located in air handling
units where they may be exposed to refrigerated air,
the boiler piping must be equipped with flow control
valves to prevent gravity circulation of boiler water
during operation of the cooling system.
6. Install optional low water cut-off such as McDonnell
& Miller Model PS851-M-120 or equal in system
WARNING
Do not install valves, plugs or caps in
safety relief valve piping.
Safety relief valve piping must be
terminated such that in the event the
safety relief valve opens, the discharge
will not cause personal injury or
damage.
7. There must be a minimum of five pipe diameters
of straight horizontal run downstream of the flow
switch. Otherwise, premature failure of flow switch
paddle may occur. See flow switch instruction
manual (MM-601) included with boiler.
WARNING
Failure to operate the unit with the proper water
flow rate can lead to appliance failure. Always
verify proper water flow switch operation so that
the unit stops operating if improper water flow is
present.
WARNING
Failure to operate the unit with the proper water
flow rate can lead to appliane failure. Always
install water flow switch so that the unit stops
operating if improper water flow is present.
Safety relief valve discharge piping must be piped
such that the potential of severe burns is eliminated.
DO NOT pipe in any area where freezing
could occur. DO NOT install any shut-off valves,
plugs or caps. Consult Local Codes for proper
discharge piping arrangement.
Do not operate boiler with flow rates in excess of
the maximum flow rates listed in Table 3. Boiler
tube erosion and pitting will occur. Thermal Solutions
Standard Warranty does not cover problems
cause by excessive water flow rates.
If a high head system pump is installed, assure
that the boiler relief valve and system piping are
capable of operating properly at the combined
pressure of the system fill pressure plus the pump
static head pressure.
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