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Spring Air Systems Water Wash Ventilator Maintenance Manual 11/01
32
WASH SYSTEM
Poor cleaning
(I)
Spray nozzles are plugged.
(ii) Low water pressure: 40 - 70 psi (2.8 - 4.9 kg/cm2) required.
(iii) Low water temperature: 140 - 180 F ( 49 - 82 C) required.
(iv) Low detergent concentration.
(v) Improper
detergent.
(vi) Detergent pump not operating.
(vii) Hot water solenoid not operating during wash.
(viii) Insufficient wash time.
No wash water
A.
Blue “WASH ON” pilot is on during wash cycle.
(i)
Water is turned off to water wash panel.
(ii) Hot water solenoid valve is faulty.
B.
Blue “WASH ON” pilot is off during wash cycle.
(i)
Faulty contact on FAN SELECTOR SWITCH.
(ii) Faulty wash timer (T1) contact or coil. (AP10 & SBA10 type only)
Wash water runs continuously.
A. Blue “WASH ON” pilot is on
(I)
Wash timer (T1) is defective (AP10 & SBA10 type only)
A. Blue “WASH ON” pilot is on and fan is off.
(i)
Fire damper is closed. (Arrangement “F” & “T” dampers only)
(ii) Faulty thermostat in exhaust duct collar. (Arrangement “T” damper only)
(iii) Faulty end switch in Fire Damper End Switch Enclosure (ENS) (Arrangement “F” dampers only)
(iv) Fire relay (R6) is faulty. . (AP10 & SBA10 type only)
B.
Blue “WASH ON” pilot is off.
(i)
Hot water solenoid valve is stuck open. Clean or replace.
Drain plugged
(I)
Foreign material has clogged drain. Open access door of ventilator and inspect drain.
(ii) Grease trap has plugged.
SECOND LINE FIRE PROTECTION
Push the FIRE TEST button in the water wash control panel. The hot water solenoid should activate and there should be
120V across terminals 10 & 4.
Fire Protection Arrangement “T” & “F”.
To test jumper terminals 1 & 2 in the water wash panel.
Fire damper will not close on test (Arrangement “T” only)
(i)
Solenoid pinned in Fire Damper
(ii) Solenoid Enclosure SOE is faulty.
(iii) The fire damper is pinned open by foreign object in the exhaust duct collar.
(iv) Faulty wiring from water wash control panel to hood junction box.
Exhaust fan stays on
(I)
Fire relay (R7) is faulty. (AP10 & SBA10 type only)
Wash water does not turn on.
A.
Blue “WASH ON” pilot is on.
(I)
The hot water solenoid valve is faulty.
(ii) Water is shut off to the water wash control panel.
B
Blue “WASH ON” pilot is off.
(i)
The Fire relay (R6) or (R7) are faulty. . (AP10 & SBA10 type only)
(ii) The hot water solenoid valve is faulty.
