Preferred FlexFit 110 - Burner Management System (Flame Safeguard) Installation

2-14 Installation – Burner Management System (Flame Safeguard) Installation
FlexFit – Linkageless Control – Revision 1.0
PREFERRED
UTILITIES MFG CORPORATION
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Burner Management System (Flame Safeguard) Installation
1. Be sure you have read the notes in section "Electrical Noise Suppression" on page 2-12 and section "Installation Warnings
and Notes" on page 2-13.
2. Remove the old ame-monitor burner management control device by pulling it out from the wiring base in accordance with
the manufacturer's instructions. The wiring base will be reused and should not be removed.
3. If you will not be enabling the Flex Sequence Option (see parameter "P1.3.1 Flex Sequences Option" on page 4-63),
during installation, refer to "Figure 2 – 2 FF-110 BMS Standard Wiring Diagram (Typical) (Default)" on page 2-16, for a
wiring diagram.
4. If you will be enabling the Flex Sequence Option (see parameter "P1.3.1 Flex Sequences Option" on page 4-63), during
installation, refer to "Figure 2 – 3 FF-110 BMS Flex Sequence Wiring Diagram (Typical) (Field Selectable)" on page 2-17,
for a wiring diagram.
5. Disconnect any existing wires from terminals S1 and S2. They are not used with the FlexFit.
6. Remove the existing ame detector in accordance with the manufacturer's instructions.
7. For E110 retrots, move the wire upstream of the high re proving switch (before terminal 8) from terminal D to terminal M.
8. Remove any existing mod motor, because parallel-positioning servos will be used to control fuel ow, air ow, and any
other burner management related functions.
9. If there are other low re proving interlocks, then these get wired between terminals M and D. If there are no other low re
proving interlocks, then jumper terminal M to D.
10. If there are other high re proving interlocks (including the purge air ow switch), then these get wired between terminals
M and 8. If there are no other high re proving interlocks, then jumper terminal M to 8.
11. Typically, a ring rate motor is not used, since the 135-ohm controller is connected to the FlexFit-CC. However, if desired,
any existing ring rate motor/controller can be left connected to terminals 10, 11, 12, and X. With the FlexFit, they will
perform the same function as an E110.
12. If none of the main fuel valve safety shutoff valves have proof of closure, then jumper T13 to T3.
13. The call for heat terminal (T17) is a eld selectable feature. Refer to section "Call for Heat (Option)" on page 4-72, for
more information.
14. If two fuels are being used, a pole of the fuel select switch must be wired to terminals 24 and 25 as shown in the wiring
diagram.
15. Terminal 26 should have 120 V applied to it when a xed speed fan is used; it should have 0 V applied to it when using a
VSD fan for air ow.
16. Terminal 27 is used for low re hold, warm standby, or domestic hot water call for heat options. See parameter "P3.5.1
T27 Options" on page 4-75, for information about terminal 27.
17. A remote (panel mounted, etc.) reset switch may be wired to terminal 28 to reset the controller after a lockout.
18. If using a Preferred Instruments ame scanner, see section "Flame Scanner/Relay" on page 2-27, for proper ame
scanner installation.
19. For Flex Sequence Option installations utilizing direct spark ignition, ensure terminals 6 and 7 are not jumpered. Wire as
shown in "Figure 2 – 3 FF-110 BMS Flex Sequence Wiring Diagram (Typical) (Field Selectable)".
20. For Flex Sequence Option installations where SSOV leak testing is not being used, do not wire anything to terminals 6 and 16.
21. Continue with the installation referencing the appropriate FlexFit BMS wiring diagram and any other included drawings
or documentation.
22. Install the FlexFit by gently pressing it into the wiring base, ensuring it is lined up and oriented correctly.
23. Ensure the plug-in terminal blocks are properly inserted before applying power.