Flow Meter Parameters Configuration (Accessory); Flow Switch Configuration; Checks During And After Initial Start-Up - Riello TAU Unit 140 Installation And Maintenance Manual

COMMISSIONING AND MAINTENANCE
3.2.8 Flow meter parameters configuration
(accessory)
Choose the flow meter to be installed according to the ΔT of op-
eration of the thermal module.
50 70
∆T = 20°C
DN 15 DN 20
∆T = 15°C
DN 20 DN 20
∆T = 10°C
DN 20 DN 25
After installing the flow meter accessory following the instruc-
tions provided, set the following parameters:
Par. No. Description
117 Prog Input 2.
Par. No. DN 15 DN 20
HUBA HUBA
129
DN15 DN20
130 - -
140 5(*) 7(*)
3.2.9

Flow switch configuration

After connecting the flow switch to terminals 21-22 of terminal
board MO1, set parameter 117 = 4 (heating flow switch).
3.3

Checks during and after initial start-up

When the appliance it started, it must be checked by stopping
and then restarting the thermal module in the following way:
− Set the operating mode of the thermal module in heating
to 0 (Par. 1) e and close the RT input to generate a heat
request
− If required, increase the set-point value (CH → Heating
Set-point)
Menu
" "
Central Heating (CH)
" "
Domestic Hot Water (DHW)
"
Information
" "
Settings
" "
− Check that the pump turns freely as deposits and/or res-
idue may prevent this from happening, especially after
long periods of inactivity;
TAU Unit
100 115 140
DN 20 DN 25 DN 25
DN 25 DN 25 DN 25
DN 32 DN 32 DN 32
Parameter setting
3 = Heating flowmeter
DN 25 DN 32 UM
HUBA
BITRON
DN25
- 0,6
11(*) 16(*) l/min
"
A
Releasing the pump shaft (if necessary)
− insert a screwdriver in the hole (A) in the pump.
− press and turn the screwdriver to release the driveshaft.
9
Take extreme care when doing this so as not to damage the
components.
− Check the full stop of the thermal module and the heat
demand by opening the "RT" contact (OFF).
− Check that the thermal module has come to a complete
stop by setting the main switch of the equipment and
the main switch of the system to "off".
If all conditions are met, power the thermal module by setting
the system's and the appliance's master switches to "On" and
test combustion products (see Paragraph "Adjustments").
SUPPLY GAS PRESSURE CHECK
− Turn the main system switch "off"
− Remove the locking screws and the panel's front side
− Loosen by about two turns the pressure inlet screw (1) up-
stream of the gas valve and connect the pressure gauge
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