AquaMAX EM50 Series - Manual (Page 19)

18
Water Supplies
Mains Water Supply
Where the mains water supply pressure exceeds that shown in the table
below, an approved pressure limiting valve is required and should be fitted
after the stop cock and before the non return valve as shown in the “Cold
Water Supply Plumbing Arrangement” diagram on page 19.
Model EM50, E80,
E125, E160 E160X, E250
E315, E400
Pressure temperature relief valve setting 1400 KPa 1000 kPa
Expansion control valve (ECV) setting * 1200 kPa 850 kPa
Max mains supply pressure
With ECV 960 kPa 680 kPa
Without ECV 1120 kPa 800 kPa
* Expansion control valve not supplied with water heater.
Tank Water Supply
If the water heater is supplied with water from a tank supply and a pressure
pump system is not installed, then the bottom of the supply tank must be at
least 1 m above the highest point of the hot water plumbing system,
including the water heater. Care must be taken to avoid air locks. The cold
water supply line to the water heater must be adequately sized and fitted
with an approved full flow gate valve or ball valve and non return valve.
Water Supply Chemistry
Bad water can have a detrimental effect on water heater operation,
components and life expectancy and may affect warranty. Refer to “Water
Chemistry” on page 11 for more information. Also refer to “Spring, Dam,
Bore & River Water Supplies” on page 13.
Plumbing & Plumbing Diagrams
Plumbing Connections
All pipe work must be cleared of foreign matter before connection and
purged before attempting to operate the water heater. Use thread sealing
tape or an approved thread sealant on all fittings (never use hemp).
All Aquamax storage cylinder water
fittings have a plastic liner fitted. These
liners must be in place for the water
heater to function properly. All liners are
correctly positioned during manufacture
and should not require handling during
installation, however if a liner is not