Raypak VERSA 155C Operating And Installation Instructions page 27

Leaking at well.
Leaking at heat exchanger.
Gasket brittle and leaking -
(overheated).
ELECTRICAL ( MILLIVOLT)
If pilot burner remains lit.
Jump across both "TH"
wires on gas valves
If main burner fires,
remove jumper
Jump across pressure
switch terminals
If main burner fires,
remove jumper
Clean filter
Check for adequate water
flow from filter
Replace pressure switch
If main burner fires,
remove jumper
Replace thermostat
Overacid..................................
Overacid..................................
Heater running after pump
Shuts off...................................
Refractory damage.....................
Sooted heater............................
CAUTION: For qualified service personnel only.
1.
2.
3.
Light pilot
If main burner does not
fire, remove jumper
If main burner does not
fire, remove jumper
Jump across thermostat
If main burner does
Jump across each high
limit and remove jumper
Replace high limit that
caused heater to fire
Replace well and maintain water chemistry
Replace heat exchanger and maintain
See pressure switch adjustment.
Replace refractory.
Determine cause of sooting and correct.
RAYPAK POOL OR SPA HEATER ELECTRICAL
CHECK WITH MV GAS VALVE
Filter must be on with adequate water flow through heater.
Gas valve must be "ON" position. Thermostat set higher
than pool water temperature.
Jumpers are for temporary check only. If left in place,
they could cause the heater to burn up.
If pilot burner goes out
when main burner lights
or when gas valve knob
is released
Remove both "TH"
Replace
wires from gas valve.
gas
Relight pilot
valve
If pilot burner stays on
Problem is a wire or
component short to
cabinet or low gas
pressure
If below 500mV, check
gas pressure. Also check
for insects or debris in
If output is still low,
replace pilot generator.
NOT fire...
27
properly.
chemistry properly.
If pilot burner
does not light
Check gas supply, gas
line size, gas pressure.
Also check for insects
or debris in pilot output.
If burner does not remain
lit, attach millivolt meter
and read pilot output.
If above 500mV,
replace gas valve
the pilot burner