Specifications

TM018 Raypak 131 Type A Pool & Spa Heaters REV: A
D.O.I: 8/04/2009
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30
Fault Finding Chart 4
4
45ºC inlet high limit faulty.
Replace 45ºC inlet high limit.
45ºC inlet
high limit
55ºC outlet
high limit
Which high limit has
tripped?
Does 45ºC inlet high limit
contact close?
When 55ºC outlet
high limit trips is
water temp > 55ºC?
YES
NO
When 45ºC inlet high limit
trips is water temp > 42ºC
YES
NO
C
Do 55ºC outlet high limit
contact close?
NO
NO
YES
C
55ºC outlet high limit faulty.
Replace 55ºC outlet high limit.
When 55ºC outlet high
limit trips is the inlet water
temp > 42ºC?
YES
NO
Is water flow through
heater > 1.3 l/sec?
YES
Is water pressure or
flow switch closed
when pump is
running?
NO
Can water pressure
or flow switch be
adjusted?
YES
NO
NO
YES
5
Two faults may exist.
Continue with fault finding
to determine why water
flow is too low then check
heater operation to
determine if high limit(s)
trip.
YES
Clean or replace tube bundle.
Are heat exchanger
fins blocked?
YES
NO
Are heat exchanger
fins blocked with
soot?
NO
Is burner flame
satisfactory?
YES YES
Is inlet gas pressure
within specification?
Advise customer.NO
Clean or replace tube
bundle.
NO
4.1
YES
Chart 4.1 is part of and
located within chart 1.8
Test 14
Test 17
Test 10A for black boards.
Test 10B for grey boards.
Refer to section on adjusting
pressure switch or section on
adjusting flow switch
3
Flow too low
45ºC inlet high limit faulty.
Replace 45ºC inlet high limit &
continue with fault finding to
determine why over temp
condition exists.
Replace water pressure or
flow switch & continue with
fault finding to determine why
water flow is too low.
Water pressure or flow switch
adjusted. Continue with fault
finding to determine why water
flow is too low.
Clean or replace tube bundle.
Continue with fault finding to
determine what is causing
sooting.
Wait until 45ºC inlet high limit
cools to below 32ºC
Wait until 55ºC outlet high
limit cools to below 45ºC.