Device Cleaning And Maintenance; Interventions On The Hydraulic System - Riello RSS R Installation And Maintenance Manual

COMMISSIONING AND MAINTENANCE
9
When operating with the PWM speed control of the circula-
tor, the regulator (D) and the flow meter (C) must always be
open. When operating with direct speed control (ON-OFF) to
decrease the flow rate the desired bend must be set, pass-
ing to a bend lower than the factory setting (see the para-
graph "Setting mode"for more information). In addition, for
a finer adjustment of the flow, you can operate the regula-
tor (D) as shown in the figure.
D
C
Graduated scale
2 - 16 l/h
CLOSED
ø6 mm
OPEN

16 DEVICE CLEANING AND MAINTENANCE

9
Service the system at least once a year and carry out the
inspections specified in the relevant manual.
The following operations must be exclusively performed by
Technical Assistance Service.
16.1 Checking the seals
After commissioning, check hydraulic fitting sealing. Make
sure there is no leakage close to electric components to avoid
short-circuits.
16.2 External cleaning
If dust accumulates on the insulation, clean it with a dry cloth.
0
Do not use abrasive products, petrol or triethylene.

17 INTERVENTIONS ON THE HYDRAULIC SYSTEM

17.1 Draining the system
− Connect a rubber hose to taps (A) and (B)
− Connect the opposite end to a vessel
− Open system drain taps and allow full drainage
− Close system drain taps and remove the rubber hose
− The exhausted heat transfer fluid must be disposed of
according to the prevailing regulations, pursuant to the
instructions provided in the safety data sheet supplied
with the glycol.
17.2 Disassembling the circulator
9
Remove the circulator when system has cooled down.
Before removing circulator (C):
− Cut power off to the solar station and to the connected
integration system, by setting the system's main switch
and the device's main switch to OFF
11
COMMISSIONING AND MAINTENANCE