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

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6 OM/SM-HY-12GF(CE) & HY-24GF(CE)
OM/SM-HY-12GF(CE) & HY-24GF(CE)
Cable entry is at the top rear right side of the appliance
for model HY-12GF(CE). There are two cable entries on
model HY-24GF(CE), at the rear right side of each
cavity. Access is gained as described in the Operator
and Service Manuals for this appliance.
Provide 230 Volt, 50 Hz, Single Phase, 15 Ampere
service. Maximum load is 2½ Amps. The electrical
schematic is located in the service compartment and
in this manual.
WARNING
THIS APPLIANCE MUST BE EARTHED.
1.3 Gas Supply Connection
Incoming service must be of sufficient size to supply
full rate without excessive pressure drop. A gas
meter is connected to the service pipe by the Gas
Supplier. Any existing meter should be checked out
by the Gas Supplier to ensure that it has adequate
capacity to provide the required rate of gas to the
steamer, in addition to any other installed equipment.
GAS INPUT RATE BTU/HR AND KW
Natural Gas Propane Gas
HY-12GF
150130 BTU/hr
44 KW
150130 BTU/hr
44 KW
HY-24GF
2 x 150130
BTU/hr
2 x 44 KW
2 x 150130
BTU/hr
2 x 44 KW
Installation pipe work must be fitted in accordance
with IGE/UP/2.
The appliance governor is suitable for both natural
and propane gas without conversion. The governor
is incorporated in the gas control valve, which is
inside the control cabinet.
Connection to the gas supply can be completed with
¾” BSPT pipe. Although the immediate connection
to the appliance is ¾” BSPT, gas supply piping must
be large enough to provide 160,000 BTU/hour.
Minimum supply pressure is 20 mBar for natural gas,
or 37 mBar for propane gas.
An isolating cock must be located close to the
appliance to allow shut down in an emergency, or for
servicing. The installation must be tested for gas
soundness and purged as specified in IGE/UP/1.
For the part of the integral gas supply downstream
from the gas valve, leak detection spray or some
solution may be used with the burners lit.
1.3.1 Gas Pressure Adjustment
Gas pressure has been set at the factory but
should be checked by connecting a manometer
to the pressure tap on the burner manifold. The
adjusted gas pressures are shown in the table
below.
Model
Natural Gas Propane Gas
mBar WCI mBar WCI
HY-12GF(CE) 7.75 3.1 25 10
HY-24GF(CE) 7.75 3.1 25 10
If necessary, the gas pressure may be
readjusted as described in Section 3..
1.3.2 Injector Diameters
Natural Gas Propane Gas
Injector
Dia. (mm)
No. of
Injectors
Injector
Dia. (mm)
No. of
Injectors
HY-12GF(CE)
Main Burner
(high fire)
1.18 30 0.70 30
HY-24GF(CE)
Main Burner
(high fire)
1.18 30 x 2 0.70 30 x 2
HY-12GF(CE)
Igniter Burner
(low fire)
0.64 1 0.41 1
HY-24GF(CE)
Igniter Burner
(low fire)
0.64 1 x 2 0.41 1 x 2
HY-12GF
(CE)
Pilot Burner
0.60 1 0.36 1
HY-24GF (CE)
Pilot Burner
0.6 1 x 2 0.36 1 x 2
1.3.3 Burner Air Adjustment
The unit is equipped with fixed aeration type
burners which have no provision for air inlet
adjustment.
1.4 Water Supply Connection
Water entry is at the rear right side of the appliance.
There are two water entries on the HY-24GF(CE).
The steamer is fitted for a ¾ inch BSPT cold water
connection. The water supply must be provided at a