Potterton iHE 100/300, Installation And Servicing Instructions

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iHE 30
• Remove the whole burner system using the
four retaining nuts holding the heat exchanger
door to the body. (
fi g 6.4).
• Remove the fl ue elbow by lifting it up and away
from the heat exchanger.
• The heat exchanger is now only retained by
the two side brackets and releasing the four
front screws will enable it to be pulled forward.
Before releasing ensure there is support avail-
able.
• Replacement is the reverse.
H
EAT
E
NGINE
C
IRCULATION
P
UMP
These are located on the return pipes of the Heat
Engines (see Fig 7.3).
•
Drain as much of the primary water as is nec-
essary to ensure the Pump is empty.
• Remove the lid of the pump wiring box and
disconnect the supply lead.
• Undo the two water connections and remove
the pump.
• Transfer the supply lead to the new Pump.
• Replacement is the reverse.
• Re fi ll and check for leaks.
P
RIMARY
DHW P
UMP
This single pump is located between the Low Loss
Header and the plate heat exchanger(see Fig 7.2)
•
Drain as much of the primary water as is nec-
essary to ensure the Pump is empty.
• Remove the lid of the pump wiring box and
disconnect the supply lead.
• Undo the two water connections and remove
the pump.
• Transfer the supply lead to the new Pump.
• Replacement is the reverse.
• Re fi ll and check for leaks.
S
ECONDARY
DHW P
UMPS
These are located on the pipes from the Plate Heat
Exchanger going to the Tank (see Fig 7.2).
•
Turn off the two valves fi tted between the Tank
and Pumps.
• Drain as much of the secondary as is neces-
sary to ensure the Pump is empty.
• Remove the lid of the Pump wiring box and
disconnect the supply lead.
• Undo the two water connections and remove
the Pump.
• Transfer the supply lead to the new Pump.
• Replacement is the reverse.
• Re fi ll and check for leaks.
E
XPANSION
V
ESSEL
(O
TIONAL
)
• Drain as much of the primary as is necessary.
• Remove the single screw holding the retaining
strap.
• Release the fl exible hose connection to the
Vessel and remove it.
• Replacement is the reverse.
C
LEANING
The casing is fi nished with a polyester coating and
will mark if abrasive cleaners are used. It should
be cleaned using standard non abrasive cleaning
products.