MCZ Polar Installation And Use Manual page 61

PROBLEM
Radiators cold in
winter
High variability of
temperature of
domestic hot water
Little domestic hot
water is provided
Hot water is not
provided
ATTENTION!
The operations
specialised MCZ personnel.
The manufacturer refuses to accept any responsibility
and the guarantee lapses if this condition is not
respected.
Problems / Causes / Solutions
PELLET STOVES
INSTALLATION AND USE MANUAL
POSSIBLE CAUSES
1. Room thermostat (local or remote)
set too low. If remote thermostat,
check if it is defective.
2. Circulator does not run because
blocked.
3. Circulator does not run.
4. Radiators have air in them
1. Water flow rate too low.
1. Insufficient mains pressure
2. Tap or mixer clogged with limescale
3. Water group clogged
1. Circulator (pump) blocked
in italics
must be carried out by
REMEDY
1. Set to higher
replace. (if remote)
2. Free up the circulator by removing
the plug and turning the shaft with a
screwdriver.
3. Check the electrical connections of
the circulator; replace if necessary.
4. Vent the radiators
1. Increase the
(minimum 3 litres per minute)
1. Check the calibration
pressure reducer.
2. Install and autoclave
3. Check and clean
4. Clean or replace the plate heat
exchanger
1. Free the circulator (pump)
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Chapter 6
61
page
temperature or
water flow rate
of the