Adjustment Procedures - Lochinvar EFW 85 Installation, Commissioning, User And Maintenance Instructions

Adjustment procedures

Procedure 1: adjust at High Fire
Carry out the next steps:
1. From status screen, press MENU
2. Press UP/DOWN ↑↓ to select "System Test" Press CONFIRM
3. Password needed to continue
4. Press CONFIRM to activate the test state.
5. Press UP/DOWN ↑↓ multiple times to select "High Power"
The water heater becomes active, after about 10 seconds, the water heater burns at high fire.
If the water heater does not start, open screw [2] two turns extra - clockwise
Note: once the test state is active, it is not necessary to press a button, selecting the desired power is suffi-
cient.
Wait for the water heater to stabilize before taking combustion readings between changes and adjustments
to the combustion. For your information, "Fan speed" and "Ionization" are displayed.
6. Measure the O percentage at the flue gas test port on the vent connection.
2
7. By setting screw [2], adjust the gas valve to obtain the O
8. To return to the status screen, and stop the water heater, press ESCAPE
once.
Decrease O
2
Increase O
2
The system test automatically stops after 10 minutes, after this the system continues with normal demand han-
dling. When the system test mode is changed during an active system test, the 10-minute timer is restarted.
Procedure 2: adjust at Low Fire
Carry out the next steps:
1. Press UP/DOWN ↑↓ multiple times to select "Low Power" → "Test State: Low Power".
After about 10 seconds, the water heater burns at low fire.
2. Wait for the water heater to stabilize and measure the O
connection.
3. By setting screw [1], adjust the gas valve to obtain the O
Decrease O
2
Increase O
2
4. To return to the status screen, and stop the water heater, press ESCAPE
once.
The system test automatically stops after 10 minutes, after this the system continues with normal demand han-
dling. When the system test mode is changed during an active system test, the 10-minute timer is reloaded.
Repeat procedures 1 and 2 until measured values match table values in § 19.1.1. best.
112
. → "Central Heating/ Information/ Settings/ System Test"
O
2
CO
2
[2]
↓
O
2
CO
2
[2]
↑
O
2
CO
2
[1]
↓
O
2
CO
2
[1]
↑
→ "Test State:Off"
→ "Test State:High Power".
value of the table in § 19.1.1.
2
↑
Turn screw [2] right (clockwise)
↓
Turn screw [2] left (counterclockwise)
percentage at the flue gas test port on the vent
2
value of the table in § 19.1.1.
2
↑
Turn screw [1] right (clockwise)
↓
Turn screw [1] left (counterclockwise)
E93.1804.014
or MENU 3 times, or RESET
or MENU 3 times, or RESET