Fault Finding - andrews RSC 150 Installation And Operation Manual

SECTION 7
Fig. 10
Removal of
Cold Inlet Dip Tube
& Hot Outlet
Nipple/Anode
20

FAULT FINDING

FAULT
(a) Check gas cock is open.
1. WATER DOES NOT
(b) Check water valves are open.
GET HOT
(c) Check that pilot is alight.
(d) Check thermostat setting. (Reset to higher temperature).
(e) Check gas pressures at burner and at gas inlet to appliance.
(f) Check cold inlet dip tube to see if it is broken or missing (see Fig. 10).
2. PILOT FLAME
(a) Try to light burner as detailed in lighting instructions.
IS OUT (b) Pilot will not light wait 3 mins and try again then see below.
(a) Check gas available.
3. PILOT WILL NOT
(b) Check thermocouple, replace if necessary.
STAY ON
(c) Check inlet gas pressure as this may be too high or too low.
(d) Pilot jet blocked, clean or replace pilot jet.
(e) Faculty magnet, replace multifunctional control.
(f) E.C.O. safety thermostat operating at too low a temperature. Replace
(a) Water already at correct temperature.
4. BURNER WILL
(b) Replace multifunctional control.
NOT LIGHT -
PILOT
ESTABLISHED
(a) Check pilot pipe for loose joints.
5. THERMOCOUPLE
(b) Check that correct amount of fresh air ventilation is available.
BURNS OUT
(c) Check that flue is clear and is correctly designed and fitted.
FREQUENTLY (d) Check for presence of halogen vapours (see page 7).
(a) Clean burner and injector.
6. HEATER SOOTING,
(b) Flue obstruction, clean flueways.
YELLOW FLAME
(c) Check flue design and termination position.
(POOR
(d) Check burner pressure.
COMBUSTION)
(e) Check for correct ventilation.
7. WATER
(a) Reset thermostat to lower temperature.
TEMPERATURE
(b) If water temperature is still too high replace multifunctional control.
TOO HIGH
(a) Reset to higher temperature.
8. WATER
(b) Check gas pressures at burner and at gas inlet to appliance.
TEMPERATURE
TOO LOW
(a) Check gas pressures at burner and at gas inlet to appliance.
9. NOT ENOUGH
(b) Check amount of water being used against recovery rate given on
HOT WATER
10. WATER DRIPPING (a) Check if water stops dripping when water in heater is hot. If water
FROM BASE OF
HEATER
(b) If water continues to drip when heater is hot. Problem is a leaking
11. RUMBLING NOISE
(a) Scale formation in heater, consult water treatment specialist. Heater
(KETTLING)
Disconnect pipe fittings and turn nipple anti clockwise to remove.
Inlet gas pressure to heater multifunctional control should be 17.5
mbar (7"Wg) to 25 mbar (10"Wg).
multifunctional control.
Data Plate.
stops problem is condensation caused by incorrectly designed flue or
by tank cooling excessively i.e. more hot water being used than
recovery rate of the heater.
joint or storage vessel.
must be descaled and suitable water treatment provided to avoid
problem re-occurring.
ACTION