Solahart 151J, Руководство пользователя

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SERVICING
56
Anode Replacement
It may be necessary to change the anode in the solar storage tank either:
•
Prior to or during the installation of the water heater and before the tank is filled with water
This may occur if changing from a standard black (magnesium) anode to a blue (aluminium) anode to suit the
chemistry of the water supply. This change is recommended to be performed either prior to the tank is installed, or
prior to the tank being filled with water.
A magnesium anode is identified by the black end of the anode head and an aluminium anode is identified by blue
paint applied to the end of the anode head.
•
Or during a regular service of the water heater.
This may occur if replacing the anode to assist in extending the life of the solar storage tank.
A 27 mm A/F socket with at least 20 mm internal depth is required to tighten or loosen the anode in a J or L tank or the
anode cover cap on an F, LF or LX tank. A speed brace or socket wrench or equivalent is suitable for the anode and anode
cover cap removal and tightening. Each anode has a 13 mm deep GB 1/2 threaded spigot on its end. The purpose of the
threaded spigot on the anode is to allow a tool, consisting of a rod or tube and non-sealing fitting, to be screwed over the
end of the anode to assist in the removal and insertion of the anode.
The anode used in a J or L tank is of a taped thread sealing type and has an anode head with a 4 mm deep 27 mm A/F hex
form. The hex form is used to tighten the anode into and loosen from the anode socket.
The anode used in an F, LF or LX tank has a larger diameter and is of a double O’ring sealing type. The anode head is
covered by and held in position by a cap with a 27 mm hex form on its end. When tightened, this cap holds the anode in
place and assists the anode to seal the O’rings against the anode fitting.
If the anode is being changed prior to or during the installation of the water heater, follow the procedure from step 3 below.
If the anode is being changed during a service, follow the procedure in full.
To change or replace the anode:
1.
Follow Steps 1 to 14 of the procedure
“Draining and Flushing the Solar Storage Tank and Collectors”
commencing on
page 54.
2. Allow the cylinder to drain to a level below the anode fitting, then lower the temperature pressure relief valve lever to
close the valve.
It is very important the lever is raised and lowered gently .
3. Remove the electrical cover.
4. J, L Tank: Unscrew the anode nut located to the left of the electric element. Screw on the anode removal tool and
withdraw the anode.
▪
Ensure the thread of the new anode is sufficiently taped and insert the anode into the cylinder through the anode
socket. Tighten the anode nut using a 27 mm socket.
5. F, LF, LX Tank: Undo and remove the anode cover cap. This exposes the tank anode fitting. Screw on the anode
removal tool and withdraw the anode.
▪
Insert the new anode into the cylinder through the anode fitting, pushing until it is almost all the way in.
▪
Place the anode cover cap over the end of the anode and tighten using a 27 mm socket. This will push the anode
home and align into the tank whilst turning to engage the threads. This will also form a seal between the
2 x O’rings and the tank anode fitting.
6. Follow Steps 16 to 20 of the procedure
“Draining and Flushing the Solar Storage Tank”
on page 54.
7. Fill and turn on the water heater, but do not switch on the electrical supply. Refer to:
Closed Circuit Systems –
“Filling and Commissioning of the Storage Tank”
on page 30 and
“Filling and
Commissioning the Closed Circuit” on page 31.
Open Circuit Systems –
“Filling and Commissioning the Storage Tank and Collectors ” on page 38.
8. Inspect for leaks at the anode connection to the water heater.
If a leak is detected, close the cold water isolation valve fully and relieve pressure from the water heater by either
operating the easing lever on the temperature pressure relief valve or opening a hot tap. Repeat this Anode
Replacement procedure to remove the anode. Reapply new thread sealant or check the O’rings, refit the anode and
repeat Steps 5 to 8.
9. Re-fit the electrical cover.
10. Switch on the electrical supply at the water heater isolating switch(s) on the switchboard and at the isolating switch(s)
at the solar storage tank(s) (if installed).
Warning: Do not turn power on until the water heater is filled with water or damage to the heating element will result.