Camus Hydronics DRH300, Installation, Operation And Service Manual

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Boiler Set-Up
1 Ensure that the boiler and piping system are
full of water. Bleed all air from the pump
housing and secondary loop.
2 Check system for any water leaks.
3 Check system for installation of glycol or
water treatment where required. Where glycol
has been used to maintain the temperature
rise across the appliance confirm that the
recommended flow for pure water has been
increased by 15% and the head loss by 20%.
4 Turn on power to the primary system pump
and the appliance secondary pump and verify
operation.
Boiler Operational Checks
1 Turn the boiler main power switch to the “ON”
position.
2 Program the adjustable points.
3 Turn the switch to the “ON” position to start
boiler operation.
4 Push the resets for low water level, high water
temperature and alarm.
5 Install a manometer on the gas supply to the
boiler and verify minimum gas supply
pressure as the burner fires at 100% of rated
input.
6 Verify operation of safeties as necessary (low
water cut-off, high limit, gas pressure, etc.).
7 Once the boiler is running and the flame has
stabilized, remove the flame sensor wire at
the sensor. Main flame must extinguish within
4 sec. If flame does not extinguish replace
the ignition control.
Boiler Operation
1 Appliance should begin the start-up process
for the sequence of operation.
2 The boiler will fire down to 20% on initial start-
up and adjust input as required to meet
system demand.
3 Based on system demand, the appliance will
modulate accordingly.
4 As system demand is satisfied, the burner will
cycle off and the combustion air fan will
decelerate at a pre-programmed rate before
the appliance shuts down.
DR 300 – DR 2500
DR 3000 – DR 5000
11.9 DOMESTIC HOT WATER HEATER
Hot water heaters are designed for installation with a
storage tank. The operation of the properly sized circulating
pump, the piping between the tank and heater and the
control of water velocity, as explained below, are important
for correct operation of your hot water heater.