10/27/2016
17
BI516
OPERATIONAL INFORMATION
In order for the installer to completely understand the WF II functions and operational sequence it is
recommended to thoroughly read and understand the information below. This knowledge can help in
determining settings that can be set according to the end customer’s needs.
WarmFlo Analyzer (WF-ANZ*) or PC software (ET-SOFT-HTG)
– can be used to verify
temperatures.
Warning, field reprogramming –
within WarmFlo II internal logic and non-volatile memory, it can
detect whether it is operating from one of the above factory pre-programmed chips or if it has been
modified (reprogrammed) with PC software or Handheld. Once the user or field technician has
downloaded (save), from that time forward the WarmFlo II physical control board is no longer governed
by the above table, or the chip code written on the plug-in chip, etc. In other words, power up/power
down, reset, or removing and re-plugging the chip does not affect any altered reprogrammed functions. It
is smart enough to know it is no longer the original chip and that
specific physical
board, from this time
forward, must be under the control of the PC software/Palm.
Normal Heating Operation
– whenever the WarmFlo screw terminal “W” is at 24 volt (with reference to
“C”), the WarmFlo controller begins turning on the elements and automatically controls the water
temperature as sampled by the ST sensor. However, if added heat is
not
required, no element power is
used.
Depending upon the Electro-Boiler model, there will be various electrical stages, all under the control of
WarmFlo. Except for the first 4.5 kW element, the remaining stages operate as steps 2, 3, and 4 from the
WarmFlo controller.
MODULATE Setting (J8) Description: Step 1 (first 4.5 kW) is pulse modulated through the triac
(approximate 1Ø second cycle) based upon the WarmFlo controller automatic requirement. Steps 2, 3,
and 4 are turned on and off with relays. However, steps 2, 3, and 4 are only used when required by the
WarmFlo water temperature calculations. Stage 1 may not necessarily remain at 100%, but is modulated
downward to meet the requirements of the water sensor, etc.
STAGING Setting (J8) Description: Steps 1, 2, 3, and 4 are turned on and off with relays. Steps 1, 2, 3,
and 4 are only used when required by the WarmFlo water temperature calculations.
The time between stage turn on depends upon where the controller logic memory was after the last
thermostat call or following a power up reset condition. The longest time between staging is from the
power up condition because the logic does not have a history of previous thermostat calls. Once the
history of several thermostat calls has been established within memory, it automatically returns to the last
active stages, with an approximate 5 seconds between stage turn on. However, during power up the logic
needs to search a number of times before it finally declares the next stage.
A clamp-on amp meter at the service input can be used to “visualize” the stage 1 modulation and/or stage
2, 3, and 4 functions.
Delay, transfer from standby to electric
– if the unit was operating in SB for more than 1 minute, the
follow-up transfer back to electric engages a 2-minute delay before any of the electric stages are
activated. The pump will react to the call for heat, but the elements will stay off for 2 minutes in order for
the pump to cool down the standby boiler vessel.
