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Cast Iron Condensing Boilers – Installation Manual
FlexCore Stainless Steel Condensing Boilers – Installation Manual
GENERAL PIPING REQUIREMENTS
Improper piping of this boiler will void the
manufacturer’s warranty and can cause boiler
failure resulting in flooding and extensive
property damage!
Shut off valves and unions should be
installed at the inlet and outlet connections
of the boiler to provide for isolation of the
unit should servicing be necessary.
Relief Valve
Pipe the discharge of the pressure relief valve as shown in
Figure 9. Mount on rear section or vertically on supply nipple.
Never install any type of valve between the
boiler and the relief valve or an explosion
causing extensive property damage, severe
personal injury or death may occur!
AIR VENT
PRESSURE
RELIEF VALVE
BOILER OUTLET
BOILER INLET
FLUE OUTLET
CONDENSATE DRAIN
ASSEMBLY
HIGH LIMIT
LOW WATER CUTOFF
TEMPERATURE &
PRESSURE GAUGE
(CK0850 TO 3000)
RIOM-0213_C
FLOW SENSOR
PIPE DISCHARGE PER ASME
SECTION IV - SO AS TO AVOID
EXPOSURE OF PERSONS TO
HOT LIQUID OR VAPOR AND
ALLOW COMPLETE DRAINAGE
OF RELIEF VALVE AND PIPING
AIR VENT
AIR VENT
PRESSURE
RELIEF VALVE
PRESSURE
RELIEF VALVE
FLOW SENSOR
BOILER OUTLET
BOILER INLET
FLUE OUTLET
HIGH LIMIT
TEMPERATURE &
PRESSURE GAUGE
(CK3500 TO 6000)
RIOM-0213_C
PIPE DISCHARGE PER ASME
SECTION IV - SO AS TO AVOID
EXPOSURE OF PERSONS TO
HOT LIQUID OR VAPOR AND
ALLOW COMPLETE DRAINAGE
OF RELIEF VALVE AND PIPING
LOW WATER
CUTOFF
CONDENSATE DRAIN
ASSEMBLY
AIR VENT
AIR VENT
PRESSURE
RELIEF VALVE
PRESSURE
RELIEF VALVE
FLOW SENSOR
BOILER OUTLET
BOILER INLET
FLUE OUTLET
HIGH LIMIT
LOW WATER CUTOFF
TEMPERATURE &
PRESSURE GAUGE
PRESSURE
RELIEF VALVE
AIR VENT
(CK7000 TO 9000)
RIOM-0213_C
PIPE DISCHARGE PER ASME
SECTION IV - SO AS TO AVOID
EXPOSURE OF PERSONS TO
HOT LIQUID OR VAPOR AND
ALLOW COMPLETE DRAINAGE
OF RELIEF VALVE AND PIPING
CONDENSATE DRAIN
ASSEMBLY
Figure 9 - FlexCore Firetube Piping
Freeze Protection
Installations in areas where the danger of freezing exists
are not recommended unless proper freeze protection is
provided. The following precautions MUST be observed:
1. A continuous flow of water through the unit MUST be
maintained! The pump responsible for flow through the
boiler must run continuously!
2. A polypropylene glycol/water mixture suitable for the
minimum temperature that the unit will be exposed to
must be used. The pump must be capable of producing
a minimum of 15% more flow and overcoming a 20%
increase in head loss. Domestic water systems must be
isolated from the boiler by the use of a heat exchanger
or other approved method.
3. If the unit must be shut off for any reason the electric,
gas and water supplies MUST be shut off and the unit
and its pump completely drained.
