Groen HY-12GF(CE), Operator Manual & Service Manual

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14 OM/SM-HY-12GF(CE) & HY-24GF(CE)
Pilot Flame Current Check
WARNING
WHEN STEAMER POWER IS TURNED ON, THERE IS
HIGH VOLTAGE PRESENT IN THE ELECTRICAL
COMPONENTS COMPARTMENT. BE SURE THAT
STEAMER IS DISCONNECTED FROM BRANCH
CIRCUIT BEFORE PERFORMING ANY REPAIRS.
1. Turn off steamer power.
2. Disconnect the ground (green) wire from the
igniter module.
3. Connect a DC micrometer between the igniter
ground terminal and the disconnected green
wire.
WARNING
DO NOT ATTEMPT TO LIGHT THE PILOT BURNER
WITH A FLAME.
4. Ignite the pilot. The micrometer should read 3
microamps minimum.
•
If current reading is correct, replace the
igniter module (see 2. 1. 7).
* If current reading is below 3 microamps,
continually check the Flame Rectification
Circuit (large orange wire, spark electrode,
pilot burner hood, and ground connections).
If necessary, tighten ground connections
and/or replace defective component(s).
5. Check for moisture around the pilot burner, and
for corrosion on the electrode and the pilot
burner hood. If necessary, remove moisture with
a dry, clean cloth. If hood and/or electrode are
excessively corroded, replace pilot burner
assembly.
2.1.10 Steam Generator Probes (High and Low
Water) P/N 070178
NOTE :
There are two probes for each steam generator.
1. Shut off power to the steamer.
2. With an 8 mm nut driver LOOSEN, but do not
remove the nuts holding the wire(s) on the probe
terminal(s).
3. The wires are connected to wire fork terminals.
These will "snap" on and off the terminal post.
Unsnap them by gently pulling on the terminal.
4. Using a 21mm open ended wrench, turn the
probe counter-clockwise to remove. Clean or
replace water level probes.
To Install:
5. Apply high temperature pipe compound to the
probe and screw it in by hand. Using a 21mm
open ended wrench, tighten the probe into the
fitting.
6. Replace the wire(s) to the probes by snapping
the fork terminals around the terminal post.
Using an 8 mm nut driver, tighten the terminal
nut.
NOTE : If two probes are to be replaced, either replace
them one at a time or note the color of the wires
attached to the probes. Do not mix them up.
2.1.11 Water Level Control Board
P/N 106258
1. Shut off electrical power to the steamer.
2. Remove the side panel screws and slide panel
away from steamer.
3. Remove two kep nuts and star washers securing
main control board mounting bracket. Lay main
control board to the side.
4. Unplug the three terminals on the side of the
water level control board: "C", "Low" and "High".
Note wire colors and terminal positions.
5. Remove four nuts holding the board to the
steamer frame and remove board.
6. Unplug the multi-conductor plug on the opposite
side of the board.
To Install:
7. Plug in the multi-conductor plug on the bottom of
the board. Make sure the plug is firmly and
properly seated.
8. Place the water level control board over the
mounting studs and fasten with four nuts.
9. Plug in the three terminals on the side of the
board, making sure to plug the
low
wire into the