SYMPTOM
WHAT TO CHECK
Safety valve pops.
a
Confirm, that pressure gauge reads correctly.
(1) If pressure goes over 15 PSI, adjust or
replace pressure switches. (Ref. 23.24). * (2) If
pressure stays under 14 1/2 PSI: (a) Clean
safety valve. (b) Replace safety valve with valve
stamped "HV". (Ref. 5).*
b.
If pressure gauge reads incorrectly, replace it
(Ref. 1).*
a.
High limit switch. If set too low, adjust and reset.
If defective, replace. (Ref. 23 HI).*
b.
Operating pressure switch. If set too high, adjust.
If defective, replace. (Ref. 23 OP)*
Generator builds up pressure, shuts down. and fails to
come on again.
c.
Water level. If low, see "Symptoms" above:
"Water does not enter generator" and "Water
enters generator very slowly."
a.
Water level. If low, see "Symptoms" above:
"Water does not enter generator" and "Water
enters generator very slowly."
Generator cuts out after 10 to 15 minutes of
operation.
b.
Time delay relay. If defective, replace, (Ref. 28).-
c.
Connections for time delay relay.'
Air vent leaks.
a.
Clean or replace vent. (Ref. 4).'
a.
Water supply, to confirm that it is on and the
pressure is 25 to 30 PSI.'
Cold water condenser does not function.
b.
Condenser water feed valve. Check solenoid coil
for continuity, and replace if defective. (Ref. 37).*
c.
Y-strainer. Clean. if necessary.
Generator operates erratically.
a.
Water pressure. So ensure it is 25 to 30 PSI.'
b.
For defective or clogged valves.*
c.
Wiring connections."
Generator will not drain.
a.
Drain valve and hose for clogging. Clean Y-
strainer and valve. (Ref. 35).'
b.
For defective drain valve.*
c
Wiring connections to drain valve."
B. Model NGB Only
Pilot will not light.
a.
That the main gas supply cock is on (handle
parallel with gas pipe) and that gas is being
supplied to the building.
b.
Position of gas valve knob. See "Operation"
section in this manual.
c.
Pilot gas line and orifice for obstructions (Ref. f7.)'
d.
Pilot gas adjustment, and readjust, if necessary.
(Ref. 17.).*
e.
For loose or broken wires*
f
.
Thermocouple. (Ref. 15).*
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