AM Series Boiler & Water Heater User Manual
CHAPTER 4: INSTALLATION
– PIPING
OMM-0100_E
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GF-146
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11/15/2019
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gas ignition system components are protected from water (dripping, spraying, etc.), during
appliance operation for basic service of circulator replacement, valves, and others.
4.3.1 Low water cutoff device
On a boiler installed above radiation level, some states and local codes require a low water
cutoff device at the time of installation.
The low water cutoff terminals are present within the line voltage junction box.
4.4 Freeze Protection
Freeze protection for new or existing systems must use glycol that is specially formulated for
this purpose. This includes inhibitors, which prevent the glycol from attacking the metallic
sy
stem components. Make certain to check that the system fluid is correct for the glycol
concentration and inhibitor level. The system should be tested at least once a year and as
recommended by the producer of the glycol solution. Allowance should be made for the
expansion of the glycol solution in the system piping. Use only inhibited propylene glycol
solutions. Ethylene glycol is toxic and can corrode gaskets and seals.
WARNING!
Never use non-approved additives or toxic boiler treatment chemicals in the heating system.
Any additives introduced into the heating system must be recognized as safe. Use only
inhibited propylene glycol solutions, which are specifically formulated for hydronic systems.
Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.
4.5 Floor Radiant Heating Systems - Boilers
The setting of parameter 3015 in the Factory Menu (see Appendix B) determines the maximum
supply temperature the boiler will maintain. No change to settings made from the control panel
will cause the supply water temperature to exceed the maximum stated in this parameter.
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If glycol is used, it must be used in accordance with the instructions supplied with the
product.
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Any additives added to the heating system must not be added directly inside the boiler but
through the heating system piping to prevent damage to the boiler.
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This boiler is capable of servicing multiple temperature loop systems. It is the responsibility
of the installer to protect the loops with lower temperature requirements from higher
temperatures that may be required by other loops.
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To protect the radiant
floor panel against over-heating you must install a safety device that
shuts-off the
boiler before it reaches the floor panel’s limit temperature.
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There is a risk of system damage due to unsuitable heating system water. If oxygen-
permeable pipes are used, e.g. for under
floor heating systems, the systems must be
separated from one another by plate heat exchangers. Unsuitable heating system water
promotes sludge and corrosion formation. This can result in boiler damage and malfunction.
4.6 Piping Components - Boilers
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Boiler system piping:
boiler system piping MUST be properly sized. Reducing the
pipe size can restrict the
flow rate through the boiler, causing inadvertent high limit
shutdowns and poor system performance.
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Boiler system pump:
Field supplied. The system pump MUST be sized to meet the
specified flow requirements.
