Thermsaver unvented water heater, Руководство по установке

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10
PROBLEM SOLVING
No water in tap from the Unit
Check that mains supply is on.
Check that the line strainer is not blocked
Check that the combination valve has been fitted so that the arrow
on it faces in the direction of the water flow.
If the water at the hot tap is cold
Boiler (indirect): Ensure that the boiler has been switched on and
working correctly.
Check that no air blocks have occurred in the primary system
Check the following are all connected correctly
Cylinder Stat
Thermal cut out (Reset by pushing red button)
Motorised valve
Boiler thermostat (max setting 82 degrees Celsius)
Boiler thermal cut out (if fitted)(Reset by pushing red button)
Direct (Electric) Models
WARNING
: Isolate unit at main electric supply before opening
heating element cover.
Ensure that power is available to the element from the electric
mains and that the isolator is on. If there is power to the element
and the element fails to operate check as follows:
Check that the thermal cut out on the elements have not operated.
If they have, reset by pressing the red button. If they cut out again
as the water heats up the cylinder thermostat has failed and needs
replacing. Fit a new thermostat and reset the thermal cut out.
With power on and the thermal cut out reset check the output
terminal on the thermostat. If the circuit cannot be completed, the
thermostat and/or cut out needs replacing.
Check current amps drawn by the heater, should be approx. 15
amps. If heating element fails to operate, change the complete
heating element assembly.
Important. In the event of an over heat situation reset all
thermal cutouts.
If hot water discharges from Tundish
WARNING
: Do not turn the mains water supply off - switch off (1)
power to immersion heaters (Direct) or (2) shut down heating
boiler (Indirect)
If hot water discharges from the tundish on indirect models there
could be a fault with the thermal cut out, cylinder thermostat or
temperature pressure relief valve. On a direct model the fault could
lie with the heating element thermostat. We recommend you call
your installer or Fabdec ltd.
SPARES
When ordering replacement parts the serial number on the unit
should be quoted.
PART/COMPONENT REFERENCES
Expansion Vessel Kit (12 Litre) - 951923
Expansion Vessel Kit (18 Litre) - 951924
Expansion Vessel Kit (25 Litre) - 951925
Motorised Valve - 951878
Immersion Heater - 951860
Temp/pressure Relief Valve - 951858
Twin Thermostat - 951879
WARNING:
Should the factory fitted temperature and pressure
relief valve be tampered with your guarantee will be invalidated.
Neither the distributor nor manufacturer shall be responsible for
any consequential damage howsoever caused.
TABLE 1 SIZING OF COPPER DISCHARGE PIPE (D2) FOR COMMON T&P RELIEF VALVE SIZES
Valve outlet Size Minimum size of Minimum size of Maximum resistance Resistance created by
discharge pipe D1 discharge pipe D2 allowed, expressed as a each elbow or bend
from tundish length of straight pipe
(i.e. no elbows or bends)
G1/2 15mm 22mm up to 9m 0.8m
28mm up to 18m 1.0m
35mm up to 27m 1.4m
G3/4 22mm 28mm up to 9m 1.0m
35mm up to 18m 1.4m
42mm up to 27m 1.7m
G1 28mm 35mm up to 9m 1.4m
42mm up to 18m 1.7m
54mm up to 27m 2.3m