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lockout condition and skip over the boiler in the firing sequence.
Each boiler in the cascade system is responsible for its own
safety functions. So, if any individual boiler control senses an
unsafe condition, it will extinguish the burner and, if necessary,
go to a lockout condition. In this way, every boiler in the system
has its individual safety controls intact and operational, even if
the firing of the boiler is under control of the master boiler.
In the event that the system sensor fails, all boilers in the system
will ignite simultaneously when there is a demand, and each
boiler will individually regulate firing rates to maintain the
master set point temperature (supply temperature set point +
differential) at the individual supply sensors built into the boiler.
If this should happen, the master boiler will display an E03 fault
code, indicating that the supply sensor has failed.
L. Cascade System Programming
1. If the boiler is used alone, skip this section.
2. Programming the Master Boiler:
a. Make sure there is no demand for heat being supplied to
the boiler.
b. Apply power to the boiler.
c. Enter the system setting program navigation following
instructions in this manual.
d. Verify that cascade address function 15 is set to 0. This
makes the master boiler address 0. NOTE: The Master Boiler
MUST be addressed as 0.
e. Change CASCADE MODE function 23 to 928 BOILERS.
f. Exit the installer menu.
3. Programming Follower Boilers:
NOTE: READ THE NOTES BELOW BEFORE PROGRAMMING
FOLLOWER BOILERS
•
The master boiler will share its alarm output with the
boiler addressed as 1.
•
If one of the follower boilers has an indirect fired water
heater connected to it, the address of this boiler must be
2 or greater.
•
It is recommended but not necessary to address boilers in
the order that they are wired.
•
No two boilers can have the same address.
•
It is not required to use all consecutive address numbers.
Example: In a 2 boiler system with an indirect connected
to the follower, the follower address would be 2 (address
1 is not used).
•
Maximum amount of boilers in a cascaded system is
eight (8).
a. Make sure there is no demand for heat being supplied to
the master boiler.
b. Apply power to the follower boiler you are working on.
c. Enter system settings following instructions in this manual.
d. Set cascade address parameter 15 to 1 for the first follower,
2 for the second follower, etc. depending on which boiler you
are programming based on the above notes. This establishes
the boiler as a follower in a cascaded system and enables
data to be transferred as needed for the system to function
at full capability.
e. Change CASCADE MODE Function 23 to 928 BOILERS.
f. Exit the installer menu.
WHL-052 Rev. 4.28.16
Part 9 - Start-Up Procedure
FOR YOUR OWN SAFETY READ BEFORE OPERATING
1. This boiler does not have a pilot. It is equipped with an
ignition device which automatically lights the burner. Do not
try to light the burner by hand.
2. BEFORE OPERATING: Smell all around the boiler area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
3. WHAT TO DO IF YOU SMELL GAS
• Do not try to light any boiler.
• Do not touch any electric switch, do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas suppliers' instructions.
• If you cannot reach your gas supplier, call the fire
department.
• Turn off the gas shutoff valve (located outside the
boiler) so that the handle is crosswise to the gas pipe.
If the handle will not turn by hand, don't try to force
or repair it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
4. Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect the
boiler and to replace any part of the control system and any
gas control that has been damaged.
5. The boiler shall be installed so the gas ignition system
components are protected from water (dripping, spraying,
rain, etc.) during boiler operation and service (circulator
replacement, condensate trap, control replacement, etc.)
Failure to follow these instructions could result in property
damage, serious personal injury, or death.
If you discover any evidence of a gas leak, shut down the
boiler at once. Find the leak source with a bubble test and
repair immediately. Do not start the boiler again until the
leak is repaired. Failure to comply could result in substantial
property damage, severe personal injury, or death.
A. Control Overview
The control is one of the primary safety devices of the boiler.
It monitors the safety sensors of the boiler to assure safe and
efficient operation.
The control has many features associated with system design.
This section addresses programming features, including
Boiler Settings / System Settings / Maintenance Settings and
System Diagnostics, to help in customizing your control. It
is important to fully understand control capabilities before
customization, as its factory defaults may already fit your
system design and not require any adjustment at all.
B. Navigation of the Display
The display includes a two line backlit LCD readout to provide
informative messages about the operation of the boiler. Many
operating parameters can be viewed and adjusted by using
the six buttons on the display. The function of each button is
described below.
RESET – The RESET button has two functions.
– Resets any lockout error code
– Returns the user to the default display screen.
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