Camus Hydronics DRH300, Installation, Operation And Service Manual

Page: 65 / 87

59
•
Caution - A mechanical room operating under a
negative pressure may experience a downdraft in the
flue of an appliance that is not firing. The cold outside
air may be pulled down the flue and freeze a heat
exchanger. This condition must be corrected to 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 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 heat exchanger completely
o
Ensure the pump and connecting piping are fully drained
10.14 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.
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 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.
PART 11 INSTALLATIONS
WARNING
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
WARNING
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 odorant level in the gas.
11.1 CHECKING THE INSTALLATION
•
Inspect the connections for water, gas and electricity.
•
Inlet gas pressure must be a minimum of 7” 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 8.3 Gas Valve Adjustment Procedure of
the manual for recommendations on setting combustion
characteristics
11.2 CHECKING THE INSTALLTION
•
Check the boiler wiring to see that it agrees with
the wiring diagram supplied.
•
Confirm that all terminal strips and field
connections are identified.
•
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
stiep.
•
At the factory, adjustments were made to achieve
proper input and acceptable burner performance
at full input and at minimum input.
11.3 INSPECT & RECHARGE CONDENSATE
COLLECTION & NEUTRALIZING RESERVOIR
1) Inspect the ‘P’ trap and condensate reservoir in the
Dynaforce®, making sure the collection box is intact.
2) Remove screws holding lid on to condensate collection
box. Remove lid from the condensate collection box.
3) Fill with fresh water until the water begins to flow out of
drain.
4) Re-install the lid and hold-down screws on the
condensate collection box.
5) Inspect the condensate neutralizer supplied on site and
confirm that it contains sufficient calcium carbonate to
operate effectively to neutralize condensate to required
level.
6) Check pH level of condensate.