User Instructions - Heatrae Sadia MegaFlo Installation Manual

7

User Instructions

7.1 WARNINGS 7.1 WARNINGS
IF WATER ISSUES FROM THE TEMPERATURE/PRESSURE RELIEF VALVE ON THE IF WATER ISSUES FROM THE TEMPERATURE/PRESSURE RELIEF VALVE ON THE
MEGAFLO UNIT REFER TO SECTION 7.4 FIRST. IF THIS DOES NOT RECTIFY THE MEGAFLO UNIT REFER TO SECTION 7.4 FIRST. IF THIS DOES NOT RECTIFY THE
FAULT SWITCH OFF ELECTRICAL SUPPLY TO THE IMMERSION HEATER(S) (DIRECT FAULT SWITCH OFF ELECTRICAL SUPPLY TO THE IMMERSION HEATER(S) (DIRECT
UNITS) OR SHUT DOWN THE BOILER (INDIRECT UNITS). DO NOT TURN OFF THE UNITS) OR SHUT DOWN THE BOILER (INDIRECT UNITS). DO NOT TURN OFF THE
WATER SUPPLY. CONTACT A COMPETENT INSTALLER FOR UNVENTED WATER WATER SUPPLY. CONTACT A COMPETENT INSTALLER FOR UNVENTED WATER
HEATERS TO CHECK THE SYSTEM. HEATERS TO CHECK THE SYSTEM.
DO NOT TAMPER WITH ANY OF THE SAFETY VALVES FITTED TO THE MEGAFLO DO NOT TAMPER WITH ANY OF THE SAFETY VALVES FITTED TO THE MEGAFLO
SYSTEM, IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER. SYSTEM, IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER.
7.2 TEMPERATURE CONTROL 7.2 TEMPERATURE CONTROL
IMMERSION HEATERS IMMERSION HEATERS
A combined thermostat and thermal cut-out is provided for each immersion heater. The
thermostat is factory set to give a water storage temperature of approx. 60
it can be set to control between 10
installation. Adjustments can only be made by opening the terminal cover(s), DO NOT
remove the cover(s) without fi rst switching off the electrical supply. The temperature adjust- remove the cover(s) without fi rst switching off the electrical supply.
ment is made by inserting a fl at bladed screwdriver in the slot in the disc on top of the
thermostat and rotating (see Figure 10).
If in any doubt consult a competent electrician.
INDIRECT UNITS INDIRECT UNITS
Indirect units (CL models) are fi tted with an Indirect Thermostat which controls a 2-port
motorised valve and hence the temperature of the water in the Megafl o unit. The thermo-
stat is factory set to give a water storage temperature of approx. 60
set to control between 10
Adjustments can only be made by opening the terminal cover. DO NOT remove the cover
without fi rst switching off the electrical supply. without fi rst switching off the electrical supply. Temperature adjustment is made by inserting
a fl at bladed screwdriver in the adjustment knob located on the front of the thermostat
mounting bracket (see Figure 12) and rotating. At the minimum position the temperature
will be approx. 10
to 70 C
o
If in any doubt consult a competent electrician.
DO NOT bypass the thermal cut-out in any circumstances. DO NOT bypass the thermal cut-out in any circumstances.
7.3 FLOW PERFORMANCE 7.3 FLOW PERFORMANCE
When initially opening hot outlets a small surge in fl ow may be noticed as pressures stabi-
lise. This is quite normal with unvented systems and does not indicate a fault.
In some areas a cloudiness may be noticed in the hot water. This is due to aeration of the
water, is quite normal and will quickly clear.
C and 70
o
C and 70 C, this will usually have been done during installation.
o o
C. The adjustment range 1 to 5 represents a temperature range of 30
o
C. This will usually have been done during
o
C, however it can be
o
DO NOT remove the cover
C, however
o
DO NOT
o
25