Trouble Shooting - Ace Heating Solutions Mini-Pack Operating And Maintenance Instruction Manual

Trouble Shooting

1. Water temperature too high:
1. Check the setting of the Accritem and its sensitivity screw (and positioner if provided), and
verify a steady 30 PSI air supply pressure to the Accritem. The outlet pressure gauge on the
Accritem should read 30 PSI when fully opened, and 0 PSI when fully closed. If this is not
the case the sensitivity screw needs adjustment or the air passage is clogged. Under normal
operating conditions the outlet gauge reading will fall within this range.
2. Confirm steam supply pressure to the control valve conforms to that specified in the List of
Materials (See
3. Confirm that the domestic water inlet and outlet valves are 100% open.
4. Make sure the integral circulator pump is operational.
5. Check for proper condensate drainage, cleaning out any dirt and debris. Condensate should
flow by gravity to a condensate receiver.
6. Check to see if the Packing gland around the valve stem is too tight or the valve stem is bent
(See Technical Data sheets
7. Check for proper spring tension on air operated valves (See
enclosed).
8. Check for dirt under the valve seat and/or damage to the seat (See
enclosed).
9. The temperature bulb's sensing element may be dysfunctional (See
enclosed).
2. Banging or pinging:
1. Check for proper condensate drainage. Clean out all dirt and debris.
2. Check for backpressure in the condensate line. Condensate should flow by gravity to a
condensate receiver.
3. Do not attempt to lift condensate above the orifice union height.
4. Check that any customer installed auxiliary steam trap(s) are operating properly.
3. Erratic temperature control:
1. Check the setting of the Accritem and its sensitivity screw (and positioner if provided), and
verify a steady 30 PSI air supply pressure to the Accritem. The outlet pressure gauge on the
Accritem should read 30 PSI when fully opened, and 0 PSI when fully closed. If this is not
the case the sensitivity screw needs adjustment or the air passage is clogged. Under normal
operating conditions the outlet gauge reading will fall within this range.
2. Make sure the integral circulator pump is operational.
3. Check for proper flow direction of the circulator pump.
downwards to the cold domestic inlet nozzle.
4. Check for backpressure in the condensate line. Condensate should flow by gravity to a
condensate receiver.
5. Confirm steam supply pressure to the valve is steady and agrees with that specified in the
List of Materials. (See
6. Check steam orifice union for proper operation, cleaning if necessary.
7. Check that any customer installed auxiliary steam trap(s) are operating properly.
8. Check the control temperature bulb for exterior scale or buildup and clean if necessary.
9. Check for and clean out, any debris in the upstream strainer, valve body, and valve seat.
10. Sticking valve stem. This can be caused by a bent valve stem or a valve stem not properly
lubricated. A sticking valve stem can also be caused by the packing gland assembly being
too tight. Loosen the packing gland assembly and lubricate.
4. Poor recovery:
1. Check the setting of the Accritem and its sensitivity screw (and positioner if provided), and
verify a steady 30 PSI air supply pressure to the Accritem. The outlet pressure gauge on the
Accritem should read 30 PSI when fully opened, and 0 PSI when fully closed. If this is not
List of Materials enclosed).
enclosed).
List of Materials
The pump should be flowing
enclosed).
ACE BOILER INC.
Page 15
Technical Data sheets
Technical Data sheets
Technical Data sheets