IBC VFC 15-150 Installation And Operating Instructions Manual page 52

Figure 34: Refactory Detail
Figure 35a: VFC 15-150 Fan Detial
4-8
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
For option 3 – install the 4 small Phillips screws through the gas valve
c.
support bracket and into the gas valve adjacent to the gas inlet. The
screws are to be loosely attached at this stage to allow easier alignment
at step 7. After the v-clamp is tightened at step 7, these 4 screws at
support bracket can be tightened. Reinstate all gas piping.
With the FC/ Fan / gas valve assembly secure, place a good v-clamp-to-
7.
burner gasket over the top of the burner flange, spread the v-clamp to span
the HX-burner-gasket sandwich then draw the v-clamp nut tight by hand plus
2 turns by wrench. Do not over-tighten. Use a max. 5 ft/lbs torque.
Reconnect all fan and gas valve electric leads, vinyl hoses
8.
Re-install ignitor, tightening its screws by hand, then an extra 1/2 turn.
9.
Re-attach ignitor wire and ground wire to ignitor.
10.
11. Open up the gas supply and check for possible leaks
12. Return electric power to the boiler and perform start up routine
13. If the outer refractory ring has been replaced at Step 1 above, using a Type J
or K thermocouple, check the upper areas of the HX and lid for temperature
for good thermal sealing at the refractory-to-lid interface. Allow 20 mins. prior
running at high fire before the test; max target is 110°C
14. Check for gas or fume leaks after 10 minutes of continuous operation.
FOR REMOVAL OF THE FAN AND/OR GAS VALVE
For removal of the fan and/or gas valve only, follow steps 1(a) to (f) above,
then depending on the objective perform the following:
•
Fan removal: use Option 2, the additional steps within 2(a) (b) and (c) above
•
Gas valve: use Option 3
For any change-out of the fan: with a permanent marker or equivalent, make an
alignment mark between the fan and swirl plate adapter and use a 6 mm hex
(Allen) key or driver, remove the 3 screws that attach the gas valve/swirl plate
assembly to the fan.
FOR RE-INSTALLATION OF FAN AND/OR GAS VALVE,
1. If the gas valve has been removed, reattach it to the swirl plate.
2. Re-attach gas valve and swirl plate assembly onto fan observing the
alignment marks made during disassembly.
Re-plug both upper and lower fan harness connectors.
3.
Re-plug gas valve connector and tighten up retaining screw.
4.
If a new gas valve is being installed, remove the protective cover from the
5.
gas inlet now.
Vellumoid
paper gasket
Figure 35b: VFC 45-225 Fan Detail
Vellumoid paper gasket
INSTALLATION AND OPERATION INSTRUCTIONS
Aluminium Spacer
Vellumoid paper gasket