Soft Start Option; Pump Mode (Ec Technology) - Lochinvar TTW Series Installation, Commissioning And Maintenance Instructions

For each setting, the relevant Soft start settings are automatically adjusted, dependent of its main setting P4BE..
In case of gas conversion, paste the corresponding
sticker at the appropriate position in the water heater
and mark the square for the used gas type. Also, mark
the square, indicating that the correct value has been set
for parameter P4BD.
In the example below, 'propane' and 'P4BD = 1' have been marked).
17.1.5

SOFT START OPTION

Start parameters can be modified to achieve better start behavior, in case of noise or other difficulties. This is done by reducing the fan ramp-
up speed. Two reduced settings are available (I and II).
P4 BE Soft start
(display D9).
0 = normal start-up
1 = reduced fan ramp-up speed (I)
2 = reduced fan ramp-up speed (II)
17.1.6

PUMP MODE (EC TECHNOLOGY)

When using a pump with Electronic Commutation technology and start-stop function, with a separate control connection, this parameter
determines the relay for switching the pump on and off.
P5 BN Pump mode
Do not use the 230 Vac relay for the main power supply of the pump, but directly connect the pump to the mains of the
water heater.
Pumps with an on/off control can be switched by one of the relay connections "lock-out", "burner burning" or "heat demand" (called 1, 2 and
3). Choose a connection which is not yet used.
0 = Normal mode.
1 = Start-stop through relay 1, connector 19 and 20 (lock-out)
2 = Start-stop through relay 2, connector 21 and 22 (burner burning)
3 = Start-stop through relay 3, connector 23 and 24 (heat demand)
4 = Do not use (reserved for future applications).
(0=normal, 1=reduced
(0=modulating, 1=relay1, 2= relay2, 3= relay3, 4= do not use) (display DA).
G31 P
G30/G31 B/P
fan ramp-up speed
PROPANE
PROPAN
PROPANO
PROPAAN
BUTANE/PROPANE
BUTAN/PROPAN
BUTANO/PROPANO
BUTAAN/PROPAAN
(I), 2= reduced fan
P4BD = 1
P4BD = 2
speed ramp-up (II))
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