Checking And Adjusting At Minimum Load Ef120 / Ef150 / Ef180 - Lochinvar EcoForce EF80 Installation, Commissioning, User And Maintenance Instructions

C A A
HECKING ND DJUSTING
Adjusting these water heaters at minimum load in case B involves extra measurements, to get both valves balanced:
Press [▼] button until minimum load is reached. The following screen will appear:
Display message
Water heater is activated and operates at service mode at 26% (minimum).
See 21.2.5 for pressure settings "p-out" gas valve for the used water heater and gas type.
Use screw [1] on the left hand gas valve to adjust the measured pressure at "p-out" to the right value according to 21.2.5. Be sure the
manometer has been zeroed out prior to making this setting.
Below, the influence of turning screw [1] is described.
Turning counter clockwise
Turning clockwise
After "p-out" has been set as per 21.2.5, use only the right hand screw [1] for setting the CO
Adjust the right hand valve at minimum load by carrying out procedure 2 on page 89.
Again, toggle between high fire and low fire to make fine-tuning adjustments (adjusting the minimum setting affects the maximum setting and
vice-versa).
If the valves have been set correctly, "p-out "left should equal "p-out "right. As an additional test, one could check this by measuring "p-out" at
the RIGHT valve, i.e. at measuring point 4 on the right valve (not denoted in the drawings on page 88).
This pressure should be in the same range of pressure as the left valve, so in accordance with 21.2.5 again.
If, after all setting steps have been carried out properly, the values of left and right "p-out "are still very different, contact Lochinvar Technical
support.
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 on the right, 'propane' and 'P4BD = 1'
have been marked).
G31 P
G30/G31 B/P
A M L EF120 / EF150 / EF180
T INIMUM OAD
W A T R H T R
> > > 1 2 3
less gas

 more gas
PROPANE

PROPAN P4BD = 1
PROPANO
PROPAAN
BUTANE/PROPANE
BUTAN/PROPAN P4BD = 2
BUTANO/PROPANO
BUTAAN/PROPAAN
: S e r v i c
. 4 ° C ( 1 2
a drop in CO

2
 a rise in CO
2

e 2 6 %
3 . 4 ° C )
a drop in measured pressure at "p-out"

 a rise in measured pressure at "p-out"
at low fire.
2
95