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15.1.3 Custom menu
Setting method of Custom menu
Custom menu
17:26, Wed
Cool mode
Back-up heater
Reset energy monitor
Select Confirm
Please press
for 10 sec.
Items that can be set
Cool mode (Set With/Without Cooling function) Default is
without
(CAUTION) As with/without Cool mode may affect electricity
application, please be careful and do not simply
change it.
In Cool mode, please be careful if piping is not
insulated properly, dew may form on pipe and
water may drip on the fl oor and damage the fl oor.
Backup heater (Use/Do not use Backup heater)
(CAUTION) It is different from to use/not to use backup
heater set by client. When this setting is used,
heater power on due to protection against frost
will be disabled. (Please use this setting when it
is required by utility company.)
By using this setting, it cannot defrost due to
low Heating's setting temp and operation may
stop (H75)
Please set under the responsibility of installer.
When it stops frequently, it may be due to
insuffi cient circulation fl ow rate, setting temp of
heating is too low etc.
Reset energy monitor (delete memory of Energy monitor)
Please use when moving house and handover the unit.
15.1.4 Specifications
15.1.4.1 Specifications of fresh water was heat transfer medium in brazed heat
exchanger
Parameter Quality Limits for Tap Water on the Secondary Side
Temperature Below 60°C
pH 7 to 9
Alkalinity
60mg/l < HCO₃ < 300mg/l
Conductivity < 500μS/cm
Hardness
[Ca⁺, Mg⁺] / [HCO₃⁻] > 0.5
Chloride < 200mg/l at 60°C
Sulphate
[SO₄²⁻] < 100mg/l and [HCO₃⁻] / [SO₄²⁻] > 1
Nitrate
NO₃ < 100mg/l
Chlorine < 0.5mg/l
15.1.4.2 External filter
Solids in the water must be filtered.
Minimum filter mesh size required for the field supply external filter in the water inlet is 20 mesh.
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