Bananza UHD 75, Installation, Operation & Service Manual

Page: 35 / 60

SECTION 11: O
PERATION AND
M
AINTENANCE
27 of 47
Fi g ure 15: Automatic Burner Control Se q uence
Fi g ure 16: Gas Valve for Models UHD[X][S] 75 – 125
Burner Se q uence for Ignition Control
Flame Signal
Start Gas Val v e
Ignition Spark
Thermostat 24 V
SHUT DO WN
RU N START
ts = 10 Seconds
Signals Output By Control
Re q uired Incoming Signals
Flue Blower
Pressure
Switch
P
C
N O
N C
30 Seconds Purge*
*Purge time b egins at pressure switch change o v er.
30 Seconds Post
If at any stage the flame fails, the control w ill retry
for ignition. The control has fo u r trials for ignition
before a one ho u r locko u t.
½PSI
I
N
C
O N
OFF
Regulator
Outlet
Pressure
Gas Inlet
Inlet Pressure
TOP VIEW
END VIEW
Description Part Number
Gas V alve 75 – 125 NG 90032505
Gas V alve 75 – 125 LP 90032506