Dometic SPOTZERO SZIII 2000, User Manual & Installation Manual

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Winterization For Your Unit
There are two options for winterizing your unit.
Option 1: Winterization with membrane rack removal
The best practice for winterization is to remove the membrane rack and store with Spot Zero
membrane storage chemical in a heated storage climate. Information on how to store the system with
System fo
eed from Desalinator should be disconnected and the remainder of the system should be stored with
propylene glycol from the dock water feed inlet to the overboard to prevent freeze damage (propylene
glycol can be purchased at most hardware or automotive retailers).
Option 2: Winterization with membrane rack
If the system is stored in freezing or near freezing temperatures and the membrane rack cannot
be removed and stored in a heated climate, the following should be done.
1. Disconnect the inlet hose from the prefilter. This is the hose on the dock water side of the
filter not the hose that goes from the prefilter to the unit.
2. Remove the filters from the prefilter housings.
3. Disconnect the
hose, , and the
hoses from the unit.
4. Attach a short run of hose to the inlet side of the prefilters. In addition,
LLDPE hose from the LLDPE hose from the
on the unit.
5. A solution must be made to winterize your unit. A 5-gallon 50/50 ratio of the following two
ingredients must be mixed with one bottle of the Spot Zero chemical cleaner.
a. Propylene glycol which can be purchased at most hardware or automotive stores
b. Distilled water or product water from your Spot Zero unit
c. Membrane storage chemical (part #252404263) which can be purchased through
any dealer of Spot Zero (1 bottle)
6. Mix the contents of the Spot Zero chemical cleaner into this 5-gallon solution.
7. Place the short run of hoses that were installed in Step 4 into the 5-gallon bucket of solution
created in steps 5 and 6. This should make a closed-loop flow circuit where the ,
feed, and feed are all feeding/drawing from the same source.
8. Use an auxiliary pump that is plumbed directly to the prefilter. Turn the auxiliary pump on.
Once the unit detects sufficient flow it will turn on. Let the system run and recirculate the
solution for 15 minutes. Ensure during this time that the unit does not run dry, and air is not
pumped into the system.
9. The , , , and
should now be plugged off so none of the winterization solution leaks out of the
unit as well as to prevent raw water from entering the unit.
WARNING
DO NOT USE ETHYLENE GLYCOL, ONLY NON-TOXIC PROPYLENE GLYCOL
SHOULD BE USED.
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NOTE