provide adequate freeze protection.
• Freeze protection for the appliance using an indirect coil
can be provided by using hydronic system antifreeze.
Follow the manufacturer’s instructions. DO NOT use
undiluted or automotive type antifreeze.
• Shut-down and draining - If for any reason, the unit is
to be shut off in a space where danger of freezing
exists, the following precautionary measures must be
taken:
o Shut off gas supply.
o Shut off water supply.
o Shut off electrical supply.
o Drain the main exchanger and the brazed plate
heat exchanger, if supplied, completely.
o Ensure that the pump and connecting piping are
fully drained.
11.13 FREEZE PROTECTION FOR A HEATING
BOILER SYSTEM (Optional)
• Use only properly diluted inhibited glycol antifreeze
designed for hydronic systems. Camus recommends
using a 30/70 mixture of glycol antifreeze to water. DO
NOT exceed a mixture of 50/50.
• Follow the instructions from the antifreeze manufacturer.
Quantity of antifreeze required is based on total system
volume including expansion tank volume.
• Antifreeze is denser than water and changes the
viscosity of the system. The addition of antifreeze
will decrease heat transfer and increase frictional
loss in the boiler and related piping. Where
antifreeze has been used, to maintain the
temperature rise across the appliance confirm that
the recommended GPM for pure water has been
increased by 15% and the head loss by 20%.
• Local codes require a back flow preventer or actual
disconnect from city water supply when antifreeze is
added to the system.
• When filling or topping-up the system with water mixed
with the antifreeze always used distilled or RO (reverse
osmosis) water. This will prevent the reaction of the
water with antifreeze which can create sludge.
PART 12 INSTALLATIONS
Before starting the boiler, smell near the floor and around the
boiler for any gas odours or any unusual odour. Remove the
stainless steel jacket and smell the interior of the boiler. If
there is any sign of a gas leak, do not proceed with startup.
Repair all the leaks before attempting to start the boiler.
Propane boilers ONLY – Your local propane supplier adds
an odorant to the propane gas to allow for propane gas leak
detection. In some cases, the added odorant can fade and
the gas may not give off any noticeable odour. Before
startup have the local propane supplier check for the correct
12.1 CHECKING THE INSTALLATION
• Inspect the connections for water, gas and electricity.
• Inlet gas pressure must be a minimum of 3” W.C. for
natural gas and 11” W.C. for propane.
• With the boiler off, open the main gas supply valve and
vent the trapped air from the piping leading to the boiler.
Confirm that all gas connections to the heater are tight
and that there are no missing test plugs.
Refer to Section 10.1 Setting the Correct Combustion of the
manual for recommendations on setting combustion
characteristics
12.2 CHECKING THE CONSTRUCTION
• Check the boiler wiring to see that it agrees with the
wiring diagram supplied.
• Confirm that all terminal strips and field connections are
identified.
• Confirm that the DynaMax Controller control is set in the
proper mode. In remote mode an external controller
determines the set point and the stage contacts on the
DynaMax Controller are always closed. Auto reset limits
are fixed in all Modes.
• With the boiler running, check for flue gas leaks along
the inner cabinet joints and around the flue outlet.
• Repair any leaks prior to proceeding to the next step.
• At the factory, adjustments were made to achieve
proper input and acceptable burner performance at full
input and at minimum input.
12.3 HEATING BOILER INSTALLATIONS
Before beginning the installation, consult local codes for
specific plumbing requirements. The installation should have
unions and valves at the inlet and outlet of the appliance so
it can be isolated for service. An air separation device must
be supplied in the installation piping to eliminate trapped air
in the system. Locate a system air vent at the highest point
in the system. The system must also have a properly sized
expansion tank installed. Typically, an air charged
diaphragm-type expansion tank is used. The expansion tank
must be installed close to the boiler and on the suction side
of the system pump (appliance Inlet) to ensure proper
operation. Caution: This appliance should not be operated at
less than 12 PSIG cold. Pressure will rise when hot.
Expansion tank sizing will determine the pressure when the
system is hot. Do not operate the system at less than 18-20
PSIG when hot. Water piping must be supported by suitable
hangers or floor stands, NOT by the appliance. Pipe systems
will be subject to considerable expansion and contraction.
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