Components Visual Inspection; Concentrate-Pump Hose Replacement - Cornelius Nitropro Mini Service And Preventative Maintenance Manual

Nitropro Mini Service Manual

4.3.4 Components Visual Inspection

Check the condition of each system component for the fol‐
lowing conditions and replace per the instructions in section
6.0 if any are observed.
Air/Water Hoses: Cracking, bulging, leaking.
Hose Connectors: Cracking, leaking, worn or distorted o‐
rings or seals.
Ice Bank & Inlet Solenoid Spring Housing (Fig. 3-9): Water
Discoloration, Contamination, Sediment. (Attempt drain and
flush before replacing component.)
Main PCB (Fig. 2-2): Corrosion or signs of overheated com‐
ponents.
Dispense Manifolds (Fig. 3-12): Check o‐rings on top por‐
tion of dispensing tubes and on the dispensing tube, outlet‐
cap nipple that inserts into the manifold. If the manifold
drips, check the solenoid valve plunger seal and o‐ring on
the orifice insert (Fig. 4‐4). Replace as the manifold assem‐
bly as required.
Figure 4‐4 ‐ Dispense Manifold Assembly
Cabinet Fan (Fig. 4-1): Verify operation.
Refrigeration System (Fig. 4-1): Verify adequate airflow
through condenser coil. Clean as needed.

4.3.5 Concentrate-Pump Hose Replacement

Pump Closed
Pump Hose
Figure 4‐5 ‐ Concentrate Pump & Overhaul Kit
Publication Number: 548000106SER
Over time, the concentrate‐pump internal hose can become
less pliable and the rotor and top bearing significantly worn.
To prevent a disruptive failure, install a new pump hose
annually as described below.
1) Inside the cabinet, disconnect the water and air lines at
the back of the chamber.
2) Pull each tap to relieve line pressure.
3) Shut off power to the Nitropro unit.
4) In the cabinet, unplug the wiring connector from the mix‐
ing‐dispensing assembly and remove the assembly. Place it
on the countertop (Fig. 4‐6).
5) Disconnect the two hoses from the pump, note or mark
their locations for reassembly.
Figure 4‐6 ‐ Mixing‐Dispensing Assembly Removed
6) Remove the four screws securing the pump bracket to the
assembly baseplate (access from underneath).
7) Open the pump cover by removing the three thumb‐
screws.
8) Lift out the pump rotor and bearing. Slide out the two
pump‐hose nipples from the pump housing.
9) Clean the pump‐hose chamber as required.
10) Install the new pump hose. When installing it, orient
the rotor as shown in the upper photos of Fig. 4‐5 so that
only one point on the hose must be compressed.
11) Reinstall the pump cover.
12) Install the pump on the baseplate and reconnect the
hoses.
13) Reinstall the mixing‐dispensing assembly into the cabi‐
net, making sure to reconnect the plumbing and electrical
connectors.
Pump Open
14) Confirm pump operation by dispensing both product
types until air is purged from the lines.
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