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11
BURNERS DO NOT IGNITE WHEN HOT WATER IS
TURNED ON
1. Pilot is not on.
Light the pilot. See lighting instructions.
2. Pilot lighting push button not turned to proper
position
Be sure that once the pilot flame is on, that the gas valve
button ( ) is slid all the way to the right to the ON position
( ).
3. Cold incoming water connection made to wrong
side of heater
Make sure cold water inlet connection is on the right side
of heater when you are facing heater.
4. Water flow rate at hot water tap is too low.
Note: The AquaStar models 38 B require 1/2gallon per
minute flow to activate the burners. This is a flow which
would fill a quart jar in 30 seconds.
5. Cold water inlet filter on heater is dirty.
Remove the filter and clean. This screen filter is located
at the inlet side of the brass water valve (fig. 10, #25).
Check and clean faucet aerators too.
6. Crossover in household plumbing
The AquaStar burner activates when there is sufficient
water pressure drop in the AquaStar water valve assembly
— ie. when a hot water faucet is opened. If there is a
crossover in the plumbing, the necessary pressure drop
in the AquaStar will be insufficient, or totally eliminated. A
plumbing crossover can be caused by a bad washer at a
single lever faucet or incorrect plumbing or a mixing valve
in the line, etc. which permits hot and cold water to mix in
the plumbing. The crossover will create a back pressure
in the system preventing the pressure drop in the Aquastar
(i.e. cold water is entering the water heater from both sides
and the burners will not come on). To confirm there is no
crossover in the plumbing, shut off the cold water supply
to the AquaStar. Open your hot water taps. There should
not be any water flowing. If there is water flowing, there is
a crossover in the plumbing. This is a plumbing problem,
not an Aquastar problem. Please contact your plumber.
7. Water valve parts may be dirty or components
damaged.
Water valve and component parts must be totally free of
dirt. First check that the venturi is free of dirt particles. In
hard water areas, mineral deposits can eventually (3 to 5
years in hard water areas) corrode the water valve parts
to a point where they will need replacing.
Any sign of
moisture or corrosion at the joint of the water valve and
the gas valve is a sign that the water valve assembly
components need to be replaced immediately
. Note: Water
valve for model 38B is part# 8707002497 for both LP and
NG models. (Contact service person to clean water valve
or replace if corrosion is present).
PILOT LIGHT GOES OUT DURING OR IMMEDIATELY
AFTER HOT WATER HAS BEEN USED
1. Gas pressure too low
Very low gas pressure may be caused by low delivered
gas pressure, a jammed gas regulator or undersized gas
lines. If the gas lines are undersized, there may still be the
specified static gas line pressure. However when the water
valve opens,and gas enters the burners, the pressure could
drop sharply, causing the pilot flame to go out. Have a gas
technician confirm the gas pressure both static and at
maximum Btu output. Specifications for your heater are
on page 2.
2. Pilot may be dirty or weak
See Page 9 for instructions on pilot maintenance.
3. Burners are not shutting down immediately when
hot water is turned off
Note: If burners don’t shut down immediately when the
hot water is turned off, the heater will overheat and the
ECO will shut-off the gas. Rebuild the water valve assembly
repair kit from CEC (part#8 703 406 204).
4. Water is too hot causing overheat sensor to shut
heater down
Reduce burners by sliding gas control to single flame
position.
WATER IS TOO HOT
1. Burners too forceful
Note: If the inlet water is quite warm, slide gas valve control
to single flame symbol ( ) and the heater will function on
a minimum burner output.
2. Temperature selection is too hot
Turn the temperature adjustment knob to the left.
WATER IS NOT HOT ENOUGH
1. Temperature adjustment knob is set too low.
Change the setting. Turn the temperature adjustment knob
clockwise (to the right).
2. Water flow through the heater is higher than the
capacity of the AquaStar to heat it
Reduce the flow demand at the faucet. See flow rates at
specific temperature rises on page 2.
3. Btu input is too low due to insufficient gas pressure
It is extremely important for a tankless
instantaneous water heater to have the right size
gas line to obtain the correct gas pressure
See specifications on page 2. Unlike storage tank water