23
22
7.9 Hot Water Circulation
The domestic hot water circulation pump is an available option within the unit. The
pump is added to minimize delay in the delivery of domestic hot water at the draw
*Ȃ+*$)/$)'*. $-0'/$*)$-0$/ѵ/$." ) -''40. $).4./ (.2# - /#
*( ./$#*/2/ -) ./*/-1 '"- / -$./) ./*$/.-2*Ȃ+*$)/ѵ
Adjustments to the pump settings should be done by authorised personnel only.
Please use caution when adjusting the unit. Parts can be hot or energized. Contact
may lead to shock, burn or electrocution.
Status indicator LED
LED on (continuously):
Normal operation (pump is running)
LED blinking short, long:
Error due to low voltage
LED blinking short (4x), long: Error due to pump speed feedback
LED blinking short (3x), long: Error due to high temperature
LED blinking short (5x), long: Pump rotor is blocked
)спп(. ѵѶȂспп $-1 )/$)"
msec., On 200 msec.
)фп(. ѵѶȂфп
/)Ҋ4
msec., On 50 msec.
Operation errors
Air bleeding the pump
The pump has an air venting function that can be activated by turning the dial to position 7
!*-ф. *).ѵȅ -2-./# .$- +*.$/$*)) #*. )ѵ# +-* 0- 2$''/& *0/
10 minutes. The procedure can be cancelled by switching to position 3 and then back to
+*.$/$*)цѵ0$' ޕ*2)*$. .$)$/ /#//# - $../$''$-$)/# +0(+ѵ#*0'/#$. /#
case the air bleeding procedure needs to be repeated.
Problem
Cause
Solution
Pump not running
- Not connected or connected correctly
- Connect correctly
- Pump too hot, dry operation- or overheating protection active
- Allow pump to cool down, pump restarts automatically
- Pump blocked
- Contact your supplier
Pump is noisy
- Air in the system
- Bleed the air
- Debris in pump
- Contact your supplier
- Worn bearing
- Replace pump
Pump settings
# $-0'/$*)+0(+#.ц. //$)"./*#**. !-*(/**((*/ $Ȃ - )/.$/0/$*).Ѷ
position 1 being the lowest and 7 the highest setting.
7. Service
LED indicator
max.
min.
цѵрп$Ȃ - )/$'- ..0- *)/-*''1
*- .4./ (.2$/#$Ȃ - )/$'+- ..0- 3 $)"сфп&җ2$/#(3$(0(*!
уфп&ҘѶ/# *+/$*)*!!/*-4ޔ// %0./' $Ȃ - )/$'+- ..0- *)/-*'1'1 $.
1$'' ѵ# $Ȃ - )/$'+- ..0- *)/-*'1'1 #.*)/-*'-)" *!сп/*хп&
)#.сп*- ѵ*-*+/$('!0)/$*)$)"*!/# Ѷ/# %0./' $Ȃ - )/$'
pressure control valve is set at its maximum of 60 kPa (default setting).
Adjustments to the valve settings should be done by authorised personnel only.
Please use caution when adjusting the unit. Parts can be hot or energized. Contact
may lead to shock, burn or electrocution.
The valve is easily set by means of a 4 mm allen key. The maximum setting of 60 kPa is reached by turning the hexagonal
key clockwise. The number of turns needed to adjust the valve to its maximum setting depends on what the current setting
is. The maximum number of turns is 20, running from its minimum to maximum setting.
7. Service
Higher
differential
pressure
Lower
differential
pressure
HEX 4 mm
