WATERMAZE SERIES
OPERATOR’S MANUAL
17
WB • 8.913-984.0-L
SETTING THE BURNER
The quickest and easiest way to adjust the air and gas
differential to the appropriate settings listed below is to
purchase the
WATER MAZE
set up kit (#7-8200). Refer
to figure 7 for locations on setting the burner. Shut main
gas valve off. With 7/16" wrench remove brass plugs
from all metering orifices on back side of machine. Install
brass valves included in set up kit into each position
and close. Turn gas main valve back on. To set static
pressure, use 0 - 50 manometer on (
D or E). To adjust
setting to desired 45 wci, remove cap on gas regulator
(
F) and turn inside adjustment screw clockwise for higher
pressure, counterclockwise for lower pressure. Replace
cap. Start machine by turning the blower switch to the
“auto” position and burner switch to the “on” position.
Once the burner lights, use the 0 - 10 manometer to set
the air differential at (
B). Note: lower port is high pres-
sure and upper port is low pressure. With hoses in posi-
tion, open brass valves. Set air differential as per chart
below.
Note: needle will shake; pinch both hoses lightly
together to read number. Adjust by opening or closing
main air butterfly and secondary air butterfly (located
on left side of burner, up top). Close brass valves. Set
the gas differential the same way as the air.
Note: read
NATURAL GAS:
LIQUID PROPANE GAS:
chart for proper gas used. Attach 0 - 10 manometer at
(
C) and set as per chart. The adjustment valve is located
to the right of the burner up top. Remove the brass cap
and adjust with a standard screwdriver. You will have to
set one burner at a time on a WB-120. Once adjusted,
shut off burner and blower. Shut off main gas line. Now
remove the brass valves used with the manometers and
replace plugs into the air and gas orifices. Turn the main
gas back on and follow the procedures for start up. Your
evaporator is now in service.
SOFT START IGNITION
To provide a smooth ignition and meet all gas train
standards, the WB-50 and WB-120 come standard with
the soft start ignition system. Before trial of ignition the
Veri-Flame will make sure the top gas solenoid is closed
(proof of closure). Once closed, the Veri-Flame will try for
a pilot flame. After approximately 8 seconds, the proof
of closure solenoid will close and allow the main gas
solenoid to open slowly.
Soft start settings: The gas metering orifice SBO-A-1
(
A) for the soft start needs to be set on 7 wci for the gas
differential. Follow (Setting The Burner) instructions for
setting the soft start gas differential.
UNIT
GPH
METERING
ORIFICE
GAS
DIFFERENTIAL
METERING
ORIFICE
AIR
DIFFERENTIAL
WB-50A
60
SBO-C-3
6
SBO-677
9
WB-120A
120
SBO-C-3
6
SBO-677
9
UNIT
GPH
METERING
ORIFICE
GAS DIFFERENTIAL
METERING
ORIFICE
AIR DIFFERENTIAL
WB-50A
60
SBO-D-7
6.5
SBO-677
8
WB-120A
120
SBO-D-7
6.5
SBO-677
8
