ACE BOILER INC.
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11
Start-up Instruction
1 It is assumed that installation is complete and that all connections have been made, including:
electrical, water boiler, domestic water, instrument air, vents, drains and safety valve discharge
lines. Prior to start-up inspect the strainer for any dirt, scale, welding particles or debris that may
have accumulated during construction.
2 Make sure the power switch is in the “off” position.
3 Set the temperature on the Accritem pr valve to a minimal water temperature output, following
instructions in the technical data sheet provided (factory does not preset).
4 If option is provided, adjust the high limit control 12º to 15ºF higher than the desired hot water
outlet temperature.
5 Close the shut-off valve on the bonnet side (heating medium side). Slowly introduce domestic
water to the unit by opening the shut-off valves at the inlet and outlet of the shell. This will allow
water to circulate in the shell. Open the relief valve when filling to purge the trapped air from the
unit.
6 Plant boiler water is used as the heating medium and is controlled by the control valve, which in
turn receives its signal from the temperature controller. If pneumatic, connect the air supply to
the filter/regulator (minimum 35psi supply to the air pressure regulator). The instrument air
supply gauge on the pressure regulator should be regulated to 30psi to the Accritem. If the
control valve is equipped with a valve positioned these pressures will still apply. The outlet
pressure gauge on the Accritem should read 30psi when fully opened, and 0psi when fully closed.
Under normal operating conditions the outlet gauge reading will fall within this range.
7 Set the temperature knob on the Accritem to its lowest temperature setting. If self-contained,
adjust the temperature adjustment nut on the valve to its lowest setting.
8 Turn on the system by turning the control panel switch to the “ON” position (the manual boiler
water supply valve should be closed at this time). The green light should come on. Make sure
the circulator pump is running. (Please refer to the pump instruction manual for details.) If
pneumatic, the solenoid on the control panel will energize, allowing air to the control valve
actuator, which in turn will open the control valve.
9 Turn on a number of hot water fixtures to establish a steady 50% load if possible, with at least a
flow of 8 to 10GPM for the initial startup. Make sure these stay on and there is not an additional
load applied elsewhere during initial startup.
10. Manually open the main boiler water shut-off valve upstream of the control valve and SLOWLY
allow boiler water to pass through the control valve. Continue until the shut-off valve is 100%
open.
11 The storage water heater will now function automatically, reacting according to demand
fluctuations and will stabilize once limits are met.
12 Slowly increase the system temperature output by adjusting the temperature knob on the
Accritem or temperature adjustment nut. Watch the temperature gauge on the front of the unit
and wait for the temperature to stabilize prior to turning it up again. Repeat this procedure slowly
until the desired outlet temperature set point has been achieved. Please note that the
temperature knob on the Accritem may not be accurate to the actual water temperature (see
gauge on shell). Once you have achieved your set point, it is recommended to loosen the set
screw on the knob and reposition as necessary to indicate the actual (gauge) temperature on the
Accritem face plate.
13 Once stabilized, turn off the hot water fixtures one at a time and watch the temperature gauge on
the unit. There should only be slight temperature fluctuations. With no hot water fixtures on, the
temperature gauge should remain stable. Watch the temperature for 5 minutes to verify the valve
has closed. If the temperature slowly creeps up, the valve is leaking hot water and may have
debris on the seat or the valve requires “zeroing”. “Zeroing” the valve requires adjusting the stem
length until the valve closes tightly.
14 If equipped with dual safety system, check the operation of the high limit safety control. Do this
by rotating the temperature dial to its lowest setting and setting the Accritem control 20º above
the high limit set point. Check that the temperature of the system matches the temperature set
point of the high limit when it engages and shuts the control valve (the red high temp light will
engage on the control panel as well).
Caution:
Very hot water may splash as it is discharged;
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