23
Super Plus -
Installation and Servicing
Fig.20 Control Sequence Logic
Fig.19 Diagram of Gas Supply Manifold
P.T.P.1
INDIVIDUAL MODULE
Shows all controls and positions of pressure test points
Module gas
service cock
Main gas
governor
Main gas valves
P.T.P.2
P.P.T.3
Main inlet gas cock
Individual module operation
Flame proving
Main burner
Fan
Pilot burner
ignition can occur
at any time during
4s spark ignition
period
8s
Spark ignition period
Purge period
approx. 35s
4s
Up to 35s
Fans start in sequence with
delays as follows:
Module 1 - 0s
Module 2 - 7s approx.
Module 3 - 14s approx.
Module 4 - 21s approx.
Module 5 - 28s approx.
Module 6 - 35s approx.
approx. 70s
(all fans running)
All modules on prepurge
if starting from cold.
(i.e. all modules have
been off, giving boiler five
-volume air change)
SERVICING
SER
VICING
Main burner
