IDEAL istor HE260, Installation And Servicing, Page: 59 / 80

59 istor system store -
Installation and Servicing
SERVICING
85 DRAINING THE BOILER
1. Refer to frame 53.
2. Close all the water isolating
valves on the piping frame.
3. Attach a length of hose to the
drain point and open the drain
valve.
4. After replacing any component
on the boiler, close the drain
valve, remove the hose and
open all system isolating
valves before proceeding to
check operation of the boiler.
86 DRAINING THE CYLINDER
1. Refer to Frame 53.
2. Close the DHW isolating
valves on the piping frame.
3. Attach a length of hose to the
drain point and open the drain
valve.
4. After replacing any component
on the tank close the drain
valve, remove the hose and
open all DHW isolating valves
before proceeding to check
operation of the boiler.
time
P R O G R A M M E R prog select + -
ist9871
3
isolating valve
(shown closed)
CH Isolating valves
Drain point
TO OPEN
time
P R O G R A M M E R
prog
select + -
isolating valve
(shown closed)
DHW Isolating valve
Drain valve
TO OPEN
2
3
Drain point
ist9872
SER
VICING