Download ACV The Challenger Operating instructions

Boiler Piping
SECTION IV - Boiler Piping
General Piping Requirements
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All plumbing must meet or exceed all local,
state and national plumbing codes.
Support all piping using hangers. DO NOT
support piping by the appliance or its components.
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Use isolation valves to isolate system components.
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Install unions for easy removal of the
CHALLENGER from the system piping.
WARNING
Should not contain any shut-off valves
or obstructions. No shut-off valve
should be piped between the appliance
and relief valve.
Low Water Cut Off / CH Pressure Sensor
NOTICE
1. The CHALLENGER has a ASME
Maximum Allowable Working Pressure of
43.5 PSI [3 bar]. The appliance is supplied
with a 30 psi [2 bar] pressure relief valve
and must be piped using the PRV connection as shown in Fig. 3 page 15.
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2. To avoid potential water damage to the surrounding area or potential scalding hazard
due to the operation of the relief valve, the
discharge piping:
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Should not be subject to conditions
where freezing could occur.
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.
Pressure Relief Valve (PRV)
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Should terminate with a plain end, not
with a threaded end. The material of the
piping should have a serviceable temperature rating of 250ºF [121ºC] or greater.
WARNING
Use a two wrench method when tightening piping onto the appliance connections. Use one wrench to prevent the
appliance piping from turning / twisting.
Failure to support the appliance piping
and connections in this manner could
cause damage to the appliance and its
components.
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above any drain connection to allow
clear visibility of the discharge.
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Must be connected to the discharge outlet of the relief valve and directed to a
safe place of disposal.
Length should be as short and direct as
possible. The size of the discharge line
should not be reduced, maintain the
same size as the outlet of the relief valve.
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Should be directed downward towards
the floor at all times. The piping should
terminate at least 6 inches [153 mm]
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The Low Water Cut Off (LWCO) only
applies for space heating. Operation of
the LWCO does not prevent a domestic
hot water call for heat.
The CHALLENGER is equipped with a factory installed pressure sensor type LWCO.
The minimum operating Central Heating
(CH) system pressure is 7 psig [0.5 bar].
If CH System pressure is below 7 psig [0.5
bar] the main display will flash a soft lockout
of “LOP” followed by the pressure reading.
Once CH system pressure is increased above
7 psi [0.5 bar] normal boiler operation will be
restored. If the appliance is installed as domestic hot water heater only, set parameter 1
(installation type) to 2 (domestic only) to
eliminate the “LOP” error in the main display,
see page 52 for setting parameters.
Check local codes if a LWCO is required. If
so, determine if this device meets their
requirements.