Magikist HWG20, Инструкция по эксплуатации, Страница: 11 / 28

-7-
5.0 PRE-OPERATION CHECKS
THE FOLLOWING PRE-OPERATION CHECKS MUST BE CARRIED OUT, PREFERABLY BY A
LICENSED GAS FITTER, AFTER INSTALLATION OF THE HEATER AND BEFORE OPERATION.
5.1 FLUSH DEBRIS FROM THE SYSTEM
During shipment and installation of your heater,
debris may accumulate that should be removed
before operating your heater. Following are steps
that should be taken to remove any debris from
the heater and the water inlet and outlet plumbing.
1) If your heater is part of a high pressure system,
remove any spray nozzle(s) from the wash
gun(s) attached to the water outlet of the
heater. If your heater is part of a low pressure
system direct the water output of the heater to
a drain.
2) Run water through the heater for 5 to 10
minutes by either operating your high pressure
pump or turning on the water supply to the
water inlet of the heater.
3) Once complete the spray nozzle(s) may be
reinstalled or the water output reconnected.
5.2 INITIAL POWER UP
With the gas supply still off, power-up the heater
by energizing the power source to the heater. The
power-up state of the
P
RO
S
AFE
II
control is
indicated by the buzzer sounding and the
temperature setting displaying 888. Following
power-up, the POWER and FLUE STATUS
indicators on the
P
RO
S
AFE
II
control should be
on. The status of the other indicators depends on
the current state of various inputs to the control.
Refer to section 6.0 PROSAFE II CONTROL for a
detailed explanation of the indicator lights of the
P
RO
S
AFE
II
control.
5.3 CHECK FLOW SWITCH &
AUTOMATIC VENT DAMPER
Before operating your heater, the flow switch and
the automatic vent damper must be checked to
ensure that they are operating correctly. If your
heater does not have an automatic vent damper
installed, the following sequence regarding the
DAMPER-OPEN indicator will not apply as the
DAMPER-OPEN indicator will always be on.
If the FLOW indicator does not follow the steps
below, the flow switch may need adjustment.
Refer to section 9.1 FLOW SWITCH for
instructions on adjusting the flow switch. If the
DAMPER-OPEN indicator does not follow the
steps below, refer to section 11.0
TROUBLESHOOTING.
1) Turn on the high pressure pump or other
source supplying water to the heater such that
water is flowing through the heater. The FLOW
indicator on the
P
RO
S
AFE
II
control should turn
on. If an automatic vent damper is installed, the
DAMPER-OPEN indicator will turn on
approximately 15 to 20 seconds after the
FLOW indicator has turned on.
2) Next, close the trigger gun or turn off the pump
or other source supplying water to the heater
such that there is no water flow through the
heater. The FLOW indicator on the
P
RO
S
AFE
II
control should turn off.
3) Repeat these steps 5 to 10 times to ensure that
when there is water flow through the heater that
the FLOW indicator is on, and when there is no
water flow through the heater that the FLOW
indicator is off.
4) Finally, turn off the pump or other source
supplying water to the heater such that there is
no water flow through the heater and the FLOW
indicator turns off. If an automatic vent damper
is installed the DAMPER-OPEN indicator will
turn off after approximately a 5 minute period.
For the automatic vent damper to operate
correctly, power to the heater must remain on.
Removing power from the heater may result in
the automatic vent damper being left in an
open position before the
P
RO
S
AFE
IIII
control
has had the opportunity to close the damper. If
your heater is equipped with an automatic
vend damper, ensure that the DAMPER-OPEN
indicator is off before powering down the
heater.
5.4 BLEED OFF AIR
As with any new gas installation, the gas lines
supplying the heater must be bled of air.
This
must be carried out by qualified personnel
only.
This step must be completed before
proceeding to the next step.
5.5 LIGHTING THE PILOT BURNER
(STANDING PILOT HEATERS ONLY)
CAUTION: Should pilot outage occur, wait 5
minutes before relighting to clear combustion
chamber of accumulated gas. If an automatic
vent damper is installed, you must also move
the service switch on the motor housing of the
vent damper to “HOLD DAMPER OPEN”
position and wait 5 minutes before relighting
(return switch to “AUTOMATIC OPERATION”