Freeze Protection For A Heating Boiler System (Optional); Part 11 Installations; Heating Boiler Installations; Water Connections - Camus Hydronics DynaFlame DFW501 Installation, Operation And Service Manual

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 secondary
exchanger, if supplied, completely.
o Ensure that the pump and connecting piping are
fully drained.
10.15 FREEZE PROTECTION FOR A HEATING
BOILER SYSTEM (Optional)
•
Use only properly diluted inhibited glycol antifreeze
designed for hydronic systems.
•
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.
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 may 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.
Where antifreeze has

PART 11 INSTALLATIONS

11.1

HEATING BOILER INSTALLATIONS

The appliance MUST always be installed in a
primary/secondary piping system for proper operation.
Before beginning the installation, consult local codes for
specific plumbing requirements. The installation should
provide 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 15 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 30 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. Pipe supports
could allow the pipe to slide resulting in noise transmitted
into the system. Padding is recommended. The boiler
pressure relief valve must be piped to a suitable floor drain.
See Section 4.2.
CAUTION
A leak in a boiler "System" will cause the "System" to
intake fresh water constantly, which will cause the tubes to
accumulate a line/scale build up. This will cause a NON-
WARRANTABLE FAILURE.
11.2

WATER CONNECTIONS

All models have FIP inlet and outlet bronze connections.
Pipe size must be in accordance with Table 4 and, between
supply and return lines, must not exceed 80 feet of
equivalent length. Any reduction in recommended pipe size
may decrease flow resulting in high water temperatures,
boiler noise, flashing to steam and non-warrantable heat
exchanger damage.
11.3

PIPING LENGTHS

The appliance circulator provides the water flow from the
primary boiler piping, through the boiler and back to the
primary system. Pipe diameter and length are critical to
ensure proper flow through the boiler.
The secondary loop piping to and from the appliance must
have a fully ported ball valve installed in both the supply
and return side piping and will be used for isolation only.
The ball valves must be the same diameter as the installed
piping. If flow control is required, other means of flow
control such as globe valve or flow setter should be used.
11.4

INTERMITTENT PUMP OPERATION

An intermittent pump operation signal is standard and can
be used to operate a separate pump contactor .A ¾ hp
pump delay relay is available as an option. When equipped
with this option, the boiler's integral circulating pump will
cycle on at each call for heat, before the burner fires. The
pump will continue to operate while the burner is firing. The
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