Wijas SMART 3.5, Installation And Operating Intructions, Page: 2 / 12

2
1. Purpose
PERFECT pressurized instantaneous water heaters are designed to supply hot water to
such sanitary devices as washbasins and sinks. Due to economic reasons, it ought to
be installed as close to the hot water connection as possible. The device is adjusted to
operate in a wet environment. However, it is prohibited to splash it with water. Maximum
inlet water temperature should not exceed 30°C.
It is worth remembering that the efficiency of each instantaneous water heater depends
on:
ƒ
its power
ƒ
water stream in the device. The higher water flow, the lower outlet water temperature
and the other way round (table 3)
ƒ
voltage drops in the electrical wiring. For instance: the voltage drop by 10% results
in lowering the heating efficiency of the device by 19% (table 1). Voltage drop below
185V may cause that the electronic system will prevent the device from activating
ƒ
inlet water temperature
Heater power depending on voltage
Voltage [V] 230 220 210 200 190
Smart 3.5 [W] 3500 3200 2917 2646 2390
Smart 4.0 [W] 4000 3640 3320 3024 2720
Smart 4.5 [W] 4500 4095 3735 3400 3060
Smart 5.0 [W] 5000 4550 4150 3780 3400
Smart 5.5 [W] 5500 5030 4585 4158 3753
table 1
Caution!!!
It is prohibited to install, disconnect or move the heater to the sides while
the power is turned on. The device can operate only in the position shown
in the figure below. Any attempt to start the device in other position will
cause damage to the heating element and the loss of warranty.
fig.1
CORRECT INCORRECT INCORRECT INCORRECT