Lochinvar 150 - 500 Installation & Operation Manual page 52

11
Operating information
If the set point still cannot be met, the Leader will continue
firing more Members until either the heat demand is met or all
water heaters on the Cascade are firing. As the heat demand
decreases, the last water heater on will modulate down to 20% of
its firing rate. Once the demand for that water heater is zero it
will shut down. As the heat demand decreases further, the
second to last water heater will modulate down and shut off.
This will continue until the demand is satisfied and all water
heaters are shut off.
Sequence of the cascade
To equalize the runtime of all water heaters on the Cascade, the
firing sequence will automatically be changed at set intervals.
For the first 24 hours after initializing the Cascade, the sequence
will be changed every hour. After that the sequence will be
changed once every 24 hours. The switching on/off sequence
will be as follows:
DAY
Day 1
Day 1 + 1 hour
Day 1 + 2 hour
Night Setback operation with cascade
Night Setback operation of the water heaters within the Cascade
is available. Programming of the Night Setback will be done
through the Leader water heater. Refer to the Armor Water
Heater Service manual for information regarding Night Setback.
52
SWITCHING ON SEQUENCE
L-M1-M2-M3-M4-M5-M6-M7
M1-M2-M3-M4-M5-M6-M7-L
M2-M3-M4-M5-M6-M7-L-M1
Installation & Operation Manual
Access modes
User
The user can adjust water tank target temperature by using the
UP and DOWN buttons (FIG. 11-1) at any time during normal
operation. By entering the USER code (0704), the user can also
change temperature units, time and date, and night setback
settings. In User Mode, the following parameters can be viewed
but not changed:
• Water heater model number
• Software version
• Total operating hours
• Total cycles
Installer
Most parameters are available only to the installer, accessible
only by entering the installer access code, see the Armor Water
Heater Service Manual.
Saving parameters
the Armor Water Heater Service Manual)
To save parameters and exit programming:
Press the ENTER/RESET button.
To keep parameter settings only for a current operating cycle:
Press the MENU/EXIT button 3 times after making all desired
parameter changes.
To enter a parameter and continue programming:
Press the MENU/EXIT button 1 time to return to the parameter
listings; press again to return to the menu listings. Remember to
press the ENTER/RESET button when finished programming in
order to save the changes made.
See the Armor Water Heater Service Manual for a detailed
description of parameters and access modes.
(reference the Parameter Table in