GRE AR20753, Руководство по установке и обслуживанию

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5
ENGLISH
START-UP AND OPERATION
After electric and hydraulic connections follow the indications for first operation:

Set the thermostat at its lowest temperature.

Turn on the hydraulic circuit pump and make sure there is no air left in your installation.

Switch on the differential switch, the green led should shine.

Set the thermostat to the desired temperature.

If water temperature is lower than the specified in the thermostat then after 1 minute the red light will shine and the
heater star working. When water temperature reaches the set point the heater automatically switch off until the
thermostat commands to switch on again.
MAINTENANCE
Externally the only necessary maintenance is to wipe water excess or ferruginous particles that could lead to more
extensive rusting.
If spare electric components are needed please use original spare parts as these were chosen for an optimum
performance.
RESISTANCE REPLACEMENT

Turn off the differential switch.

Disconnect supply cable from main connectors.

Extract the heater after loosening screws.

Pull out the flow switch

Disconnect resistance cables from the neutral connectors (3 cables) and the three phases from the contactor.

Get the resistances and the resistances casing.

Unscrew the resistances from its casing and replace by new ones (it is recommended to change the O-ring too).

Follow the instructions backward for assembling the heater.
ENVIRONMENT
All materials in contact witch water have been selected to work under severe conditions.

Resistance casing – AISI 316 stain-less steel.

Resistance shield – Titanium
These make them suitable for the following conditions:
WATER:
HCLO + CLO: 4 ppm
pH: 6 – 8
CHLORIDES: up to 250 ppm
ISOCIANURIC ACID: up to 100 ppm
CaCo
3
: up to 250 ppm
HBrO: up to 00 8 ppm
Salt: 4 – 6 gr/l.
Do not exceed those limits!
WARNING
Do not store chlorinated products near the heater, neither in the same room, as they produce highly corrosive gases.
Do not connect heater if there is a possibility that the water in the circuit is frozen.
During the use of the heater pay attention to fulfil paragraphs 702 according to VDE 0100. (Fig.6).
There are open outlet water heaters where the outlet works like a ventilator hence, do not connect any accessories unless
they are clearly recommended by the manufacturer. Do not connect this outlet to any tap or fittings not specified for this
heater. Do not connect the heater to any drinking water source.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not
play with the appliance.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.