Slant/Fin VSL-160C Part C - Manual (Page 18)

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14 - MAINTENANCE
14.7 - Circulator
pump motor
replacement (only
for 160-C model)
To replace the circulator pump follow
the steps below while, refering to
Figure 14-5:
1. follow the steps in Section 14.10 to
isolate and drain the water from the
boiler;
2. follow the steps in Section 14.2
to gain access the internal
components;
3. remove screws “B”;
4. remove the circulator pump motor
“A”;
5. label the electrical wires of the
circulator pump motor, phase and
neutral must be respected;
6. disconnect the electrical wires from
the circulator pump motor
7. install the new circulator pump
motor and reassemble the boiler
8. open the heating system isolation
valves and heating system fi ll valve
9. follow the steps in Section 12.1.3
to bleed the air from the heating
system.
NOTE: If display shows L05 reverse
polarity (phase and neutral) to the
pump
14.8 - Expansion
tank pressure (only
for 160-C model)
To check the expansion tank pressure
follow the steps below:
1. follow the steps in Section 14.10 to
isolate and drain the water from the
boiler
2. follow the steps in Section 14.2,
to gain access the internal
components;
3. check the pressure of the
expansion tank, item “4” of Figure
3-1 (The air inlet probe is on the
top of the expansion tank). It must
be 14 psi (1 bar). If the pressure is
lower recharge the expansion tank
while letting the water run out of the
heating system drain valve.
Figure 14-5 Replacing the pump motor (only for 160-C
model)