Groen GSSP-BL-10G, Service Manual

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5 SM-GSSP BOILERLESS STEAMER
circuit power relay or gas valve and maintains the ready conditions by cycling
the elements 18 seconds ON, 6 minutes OFF.
If the MANUAL mode is on, the heater control continuously turns on heat to
produce steam.
If HOLD mode is on, the HOLD and READY thermostats operate the control the
heat on the following conditions:
Scenario #1
1. When “HOLD” button is pressed, if HOLD and READY thermostats are
closed then heat will turn on.
2. Heat will remain on until HOLD and READY thermostat opens.
3. When READY thermostat opens, heat turns off.
4. Heat will remain off until READY thermostat closes then heat ON/OFF
cycle rate will initiate.
5. Heat cycle will continue until HOLD “X” is pressed to exit or the unit is
turned off.
6. If the HOLD thermostat closes due to drop in temperature, and the
READY thermostat is still closed, then the heat turns on and sequence
returns to step 2.
Scenario #2
1. When “HOLD” button is pressed, if HOLD thermostat is open and READY
thermostat is closed then heat will turn on.
2. Heat will remain on until READY thermostat opens.
3. When READY thermostat opens, heat turns off.
4. Heat will remain off until READY thermostat closes then heat ON/OFF
cycle rate will initiate.
5. Heat cycle will continue until HOLD “X” is pressed to exit or the unit is
turned off.
6. If the HOLD thermostat closes due to drop in temperature, and the
READY thermostat is still closed, then the heat turns on and sequence
returns to step 2.
Scenario #3
1. When “HOLD” button is pressed or “Timed Cook” mode expires, if HOLD
and READY thermostats are open, then heat will turn off.
2. Heat will remain off until READY thermostat closes.
3. Heat will remain off until READY thermostat closes then heat ON/OFF
cycle rate will initiate.
4. Heat cycle will continue until HOLD “X” is pressed to exit or the unit is
turned off.
5. If the HOLD thermostat closes due to drop in temperature, and the
READY thermostat is still closed, then the heat turns on and sequence
returns to step 2.
A High-Limit thermostat is provided as a safety device on each steam reservoir
to monitor the internal temperature of the steam reservoir. This temperature is
set for 280ºF and will shut down the steamer if there is very little or no water and
the steamer cavity starts to overheat.
DRAINING WATER FROM THE STEAM RESERVOIR
When water or steam is drained from the reservoir, it passes through a water
spray in the drain box controlled by a water solenoid valve to condense the
steam before it exits the steamer drain box into the drain line.
A solenoid drain valve is connected to each steam reservoir. This valve is
normally open, permitting water from the steam reservoir to drain out. When the
unit is turned on, the steam generator drain valve closes and the steam reservoir
starts to fill/drain, and the sequence runs until water reaches the proper level
for cooking operation.
When the unit is turned off, the solenoid valve opens and drains the water from
the steam reservoir. When water is drained from the steam reservoir, it passes
through the drain box and then into the drain line.
When the unit is turned off by the ON/OFF push button, the steamer will fill to the
high probe, drain, refill and drain. This is to remove the heat from the reservoir
for cleaning and reduce any possible cavity warping.
*If hot water is existing, the drain fan thermal switch could close and energize
circuit giving error code 19.
LOW WATER LEVEL DETECTION
Because prolonged operation with less than the required amount of water in the
steam reservoir could present a dangerous situation, the control takes action to
prevent the situation.
If the low probe is satisfied, the heat turns on and continues operation. If the low
probe is not satisfied, the control begins to operate unit on the HIGH water level
probe for a period up to a 8 hours maximum.
INSTALLING, CLEANING & TESTING
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL WHO ARE QUALIFIED TO
WORK WITH GAS, ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION
CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE QUIPMENT.
THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH APPLICABLE CODES.
CAUTION: DO NOT INSTALL THE UNIT WITH THE REAR VENTS BLOCKED, OR WITHIN 2
INCHES OF A HEAT SOURCE SUCH AS A BRAISING PAN, DEEP FAT FRYER,
CHARBROILER OR KETTLE. TO AVOID DRAINAGE PROBLEMS, LEVEL THE
UNIT FRONT TO BACK, AND PITCH IT SLIGHTLY TO THE FRONT.
WARNING: TO AVOID DAMAGE OR PERSONAL INJURY, FOLLOW THE WIRING DIAGRAM
EXACTLY WHEN CONNECTING THE UNIT.
CAUTION: EACH UNIT MUST HAVE A SEPARATE GROUND WIRE FOR SAFE OPERATION.
ELECTRIC MODEL INSTALLATION
ELECTRICAL SUPPLY CONNECTION
1. Panel Removal – Right Side: Open the wiring and control panel by removing
screws from the right side panel. Slide the panel forward and set it aside.
2. Supply Voltage: The unit must be operated at the rated name plate voltage.
The name plate can be found on the right side panel.
3. Phase Selection: Refer to steamer wiring diagram (pages 15-16) and
element wiring (pages 8-10).
4. Terminal Block: The terminal block for incoming power is located at the back
of the control compartment, the ground terminal is located in the wiring
compartment near the terminal block.
5. Supply Wire: The equipment grounding wire must comply with the National
Electrical Code (NEC) requirements. The wiring diagram on the inside of
the unit’s right side cover gives directions for the proper connection of the
terminal block to the supply power. The proper wire must be used or the unit
will not meet Underwriters Laboratories and NEC requirements. The electric
hole is sized for a 1” conduit fitting on the GSSP-BL-3E and GSSP-BL-5E.
The electric hole is sized for a 1-1/4” conduit fitting on the GSSP-BL-10E.
6. Branch Circuit Protection: Each SmartSteam Pro Boilerless Steamer,
including individual units of stacked models, should have its own branch
circuit protection and ground wire. Current and power demands for each
unit are as shown below.