g) Remove both elbow fittings (9)
h) Unscrew valve body from the storage tank
i) Replace with new unit and reassemble in reverse order using jointing tape and paste where
necessary (ensure correct tapping orientation)
j) Refill boiler, storage tank and pipework to correct system pressure, open heating isolating
valves
k) Test correct functioning of valve
Page 46
4) To remove/ replace plate heat exchanger
a) Isolate heating using valves on heating flow and return
b Drain down top of boiler, storage tank and pipework
c) Isolate cold mains supply using valve on cold mains pipe
d) Remove heating flow pipe (13 BS 50044C)
e) Remove tank to plate heat exchange pipe (8 BS 50045C)
f) Unscrew flow switch actuator body and remove from brass body
g) Remove cold mains supply pipe (7 BS 50048 C)
h) Remove DHW supply pipe (19 BS 50047 C)
i) Remove return manifold (l4 BS 50046 C)
j) Remove and replace plate heat exchanger
k) Reassemble in reverse order using new gaskets on plate heat exchange joints (where
necessary use jointing paste. Note : only use WRC approved jointing paste for joints containing
potable water)
l) Refill boiler, tank and pipework, pressurise to correct system pressure and open heating
isolating valves
m) Reinstate cold mains supply
n) Check for leaks and function test appliance
5) To remove/replace actuator head
a) Isolate cold mains supply using isolating valve on cold mains pipe
b) Remove control panel rear cover
c) Trace flow switch cable and disconnect from PCB
d) Remove cable grip and ease cable from control panel
Page 55 of 57
Installation & maintenance manual for Camray 5 Combi External Boilers
14/04/2005
file://D:\PL61500\PL61500.htm
