Installation / Operation Instruction Manual

Page 42
4.16 Pressure Relief Valve
of the combination boiler.
Ensure that the maximum BTU/H rating on the
pressure relief valve is equal to or greater than the
maximum input BTU/H rating of the combination
boiler.
Pressure Relief Valve must be installed on the
provided CH Pressure Relief valve tapping at the top
of the Combi & DHW outlet line as close to the unit
as possible. (CH supply line: maximum 30psi, DHW
outlet line : maximum 150psi). No other valves should
be placed between the pressure relief valve and the
appliance.
This appliance has a high-temperature shut o󰀨 switch
built in as a standard safety feature .Therefore a
“pressure only” relief valve is required.
External pressure relief valves must be installed.
Observe the following. Failure to comply with the
guidelines on installing the pressure relief valve and
discharge piping can result in personal injury, death
or substantial property damage.
This hot water boiler is provided with 30 psi safety relief
valve that complies with the ANSI/ASME Boiler and
Pressure Vessel Code, Section IV (“Heating Boilers).
(Model : CASE ACME F-82)
This safety relief valve (30 psi) is shipped loose for eld
installation.
An approved ASME HV Pressure Relief Valve must be
installed on the DHW supply line as close to the unit
as possible. Valve size 3/4”, maximum 150 psi. Not
included with boiler.
For safety, the relief valve(s) must be installed into it’s
designed location and not be removed or plugged.
Failure to comply with the guidelines on installing the
pressure relief valves and discharge piping can result in
personal injury, death or substantial property damage.
Direct the discharge piping of the pressure relief valve
so that hot water will not splash on anyone or any
nearby equipment. Attach the discharge line to the
pressure relief valve and run the end of the line within
6-12″ (150 - 300mm) of the oor.
Test the operation of the valve after lling and
pressurizing system by lifting the lever. Make sure the
valve discharges freely. If the valve fails to operate
correctly, replace it with a new relief valve. Ensure that
the discharge capacity of the pressure relief valve is
equal to or greater than the maximum pressure rating
3/4” 30psi Relief Valve
Do not operate this appliance before the pressure
relief valve supplied is installed with su󰀩cient
relieving capacity in accordance with the ASME
Rating Plate on the boiler.
DO NOT install a CH pipe line relief valve with a
pressure higher than 30 psi and a DHW pressure
relief valve with a pressure rating above 150 psi.
This is the maximum allowable relief valve setting
for the combination boiler.
WARNING
WARNING