North Star NSC25ED Installation, Operation, Maintenance & Repair Parts page 17

GENERAL WATER SOFTENER MAINTENANCE, continued
CLEANING THE NOZZLE AND VENTURI ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A clean nozzle and venturi is needed for the soft-
ener to work right. This small unit makes the suc-
tion to move brine from the salt storage area to the
resin tank during regeneration. If it becomes
plugged with sand, silt, dirt, etc., the softener will not
work and you will get hard water.
To get to the nozzle and venturi, remove the softener
top cover. Be sure the softener is in service cycle (no
water pressure at nozzle and venturi). Then, while
holding the nozzle & venturi housing with one hand,
turn off the cap. Lift out the screen support and
screen, then the nozzle and venturi. Wash and rinse
the parts in warm water until clean. If needed, use
a small brush to remove iron or dirt. Also check and
clean the gasket.
NOTE: Some models have a small flow plug located
in the nozzle and venturi, and/or a small cone
shaped screen in the housing. Be sure to check and
clean these parts, if your model is so equipped.
Carefully replace all parts in the correct order. Lubri-
cate the o-ring seal with silicone grease and place
in position. Install and tighten the cap, BY HAND
ONLY. DO NOT OVER TIGHTEN, WHICH MAY
BREAK THE CAP OR HOUSING.
NO SOFT WATER
No salt in storage tank: See page 16 to add, then
start a regeneration, or recharge.
Power supply unplugged at wall outlet, or dis-
connected from timer: Reconnect to electrical
power and start a regeneration, or recharge.
Fuse blown, circuit breaker popped, or circuit
mistakenly switched off: Check and resolve as
needed. Then, start a regeneration, or recharge.
Plumbing bypass valve(s) in ''bypass'' position:
Refer to page 6 and position valve(s) as needed to
direct soft water to house pipes. Then, start a regen-
eration, or recharge.
Timer not programmed: See....
Electronic Demand Timer -- page 10.
Nozzle & venturi dirty, or salt in storage tank
bridged: See page 16, and above to clean. Then,
start a regeneration, or recharge.
Nozzle & Venturi
IMPORTANT: Be sure small
holes in the gasket are cen-
tered directly over the small
holes in the nozzle & venturi
housing.
*INSTALL WITH NUMBERED SIDE
UP CONCAVE SIDE DOWN.
SERVICE CHECKLIST
Possible increase in water hardness: See....
Electronic Demand Timer -- page 11.
Hot water used when softener is regenerating:
The water heater will refill with hard water... see Au-
tomatic Hard Water Bypass During Regenerations,
page 14.
Leaking faucet or toilet valve: A small leak will
waste hundreds of gallons of water in just a few
days. Fix all water leaks immediately.
Cap
O- -ring Seal
Screen Support
Screen
Gasket
*Flow Plug
(HVDC)
Nozzle & Venturi
Housing
WATER INTERMITTENTLY HARD
*Flow Plug
(1- -EP)
Screen
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