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OM-NGB    5

Water Quality & Treatment

REDUCE SCALE PROBLEMS BY USING 

AND MAINTAINING A WATER SOFTENER 

FOR YOUR STEAMER!

It is essential to supply the steam generator with water that will not form scale or cause 

corrosion. Even though the steam generator is engineered to minimize scale formation 

and the effects of corrosion, their development depends on the quality of your water and 

the number of hours per day you operate the equipment.

Most water supplies are full of minerals and chemicals which are not suitable for use in 

a steam generator.

Water quality varies from state to state and city to city. It is necessary that you know 

and understand the quality of the water you are using. Your water utility can tell you 

about the minerals and chemicals in your water. The water going to the steam generator 

should be within these guidelines.

WATER QUALITY REQUIREMENTS: 

Containment 

  Water 

Supply

pH 

   7 

to 

9

Total Dissolved Solids (TDS) 

30 to 60 ppm

Hardness 

 

 

less than 60 ppm

Chlorine and Chloramine   

less than .1 ppm

Chlorides 

 

 

less than 30 ppm

Silica   

 

 

less than 12 ppm

Undissolved Solids 

 

less than 5 microns

In order to accurately choose the correct water treatment solution, a water quality test 

has to be performed.  If a “Free Start-up” is requested, the ASA will perform a water 

quality test and Unified Brands (UB) will be able to suggest the best solution for your 

water quality.  If it isn’t, your local manufacturing representative can coordinate this for 

you.

 

After the “Free Start-up” is performed, UB will add an additional 1-year parts and labor 

warranty.  If UB suggests a water treatment system, the system is purchased from UB, 

installed and maintained, water related service issues will be covered for the duration of 

the warranty period.

Summary of Contents for Groen NGB-3E

Page 1: ...NING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment NOTIFY CARRIER OF DAMAGE AT ONCE It is the responsibility of the consignee to inspect the container upon receipt of same and to determine the possibility of any damage ...

Page 2: ...36 In addition please review the sales terms and conditions set forth below IMPORTANT NOTICE WARRANTIES LIMITATIONS ON WARRANTIES AND LIMITATION OF REMEDIES The following Warranties Limitation on Warranties and Limitation of Remedies are included in the terms of sale for this product Please read this entire warranty and all warranty modifications disclaimers and limitations of remedies set forth h...

Page 3: ...0 NATIONAL FIRE PROTECTION ASSOCIATION 60 Batterymarch Park Quincy Massachusetts 02269 NFPA 70 The National Electrical Code NFPA 54 Installation of Gas Appliances Piping NFPA 96 Ventilating Hoods NSF INTERNATIONAL 789 N Dixboro Rd P O Box 130140 Ann Arbor Michigan 48113 CSA INTERNATIONAL 8501 Ease Pleasant Valley Road Cleveland Ohio 44131 AMERICAN NATIONAL STANDARDS INSTITUTE 1403 Broadway New Yor...

Page 4: ...The boiler is constructed of 1 4 thick steel which is certified by the American Society of Mechanical Engineers ASME for pressure vessels All welds are hydrostatically tested The boiler is also equipped with required instruments fittings and controls per CSD 1 Controls and Safety Devices for automatically fired boilers Heat transfer fins inside the combustion chamber add to the unit s high efficie...

Page 5: ...r The water going to the steam generator should be within these guidelines WATER QUALITY REQUIREMENTS Containment Water Supply pH 7 to 9 Total Dissolved Solids TDS 30 to 60 ppm Hardness less than 60 ppm Chlorine and Chloramine less than 1 ppm Chlorides less than 30 ppm Silica less than 12 ppm Undissolved Solids less than 5 microns In order to accurately choose the correct water treatment solution ...

Page 6: ...ng system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 PSI 3 45 kPA 1 Gas Supply Connection a Connection to the gas supply can be completed with 1 2 NPT pipe or approved equivalent Although this is the diameter for immediate connection to the unit gas supply piping must be large enough to pro...

Page 7: ...I If it is over 60 PSI a pressure regulator is required A strainer screen at the connection is also recommended to trap any debris before it can enter the system c The boiler uses a maximum of 12 9 gallons of water per hour Piping should be sized to handle total water consumption 4 Drain Connection a The drain connection is made at the rear of the unit with 1 1 4 NPT pipe DO NOT USE PLASTIC PIPE D...

Page 8: ...to repeat the trial for ignition 5 Turn the on off switch on the cabinet front panel to the ON position The amber light in the switch will come on The boiler drain valve will close The unit will fill with water When the water level reaches the mid probe the red RESET light will come on Push the start switch The green light in the switch will come on The RESET light will go out The main burner will...

Page 9: ...ically stop the gas flow and terminate the ignition trial If ignition is terminated turn the switch off and then ON again to repeat the trial Normally the pilot should light within five seconds of turning on the unit d Turn the on off switch on the front of the cabinet to ON 1 The amber light will come on 2 The boiler drain valve will close and the unit will fill with water 3 When the water reache...

Page 10: ...nce the pressure has reached 9 1 2 PSI the main burner will be shut off by an operating pressure switch Residual heat stored in the boiler s heat exchanger can however cause the pressure to continue to build even after the burner has shut down This is especially true when the unit is heated for the first time If when the pressure reaches 12 PSI a relief valve will open to prevent pressure from inc...

Page 11: ... boiler The valve is located under the boiler 3 Close the manual drain valve 4 Turn off water supply to the boiler 5 Allow the boiler to cool This takes several hours so it is recommended that you cool the boiler overnight 6 Turn on off switch to ON to close the automatic drain valve 7 Using a 1 2 hardened square wrench extension remove one of the 1 NPT pipe plugs from the front of the boiler 8 Po...

Page 12: ...r doors 19 Turn the on off switch OFF and slowly open the manual drain valve 20 When the boiler has drained completely close the manual drain valve and turn the on off switch to ON to fill the boiler with water 21 After the RESET light comes on press the start switch 22 Allow boiler pressure to develop If steamers are not present proceed to step 25 23 Set steamer timers for 10 minutes 24 When stea...

Page 13: ...eck of the following will help prevent down time and ensure continued efficient operation 1 Pressure gauge operation 2 Proper water level gauge 3 Strainer in water feed line clear 4 Air inlets for gas burner jets clean 5 Pilot burner flame blue Envelops sensor 6 Drain piping free running No blockage At least twice each month check the safety valve to be sure it is working properly When pressure re...

Page 14: ...han 60 PSI Authorized Service Rep Only c Is the Water Level Control Board defective Check for loose electrical connections on hi water fill solenoid X d Is the water fill solenoid valve defective X Check for debris on valve seat e Is the hi water probe sensing level Clean water level probe and probe well located in boiler X Boiler under fills with water User a Is the boiler level Check levelness o...

Page 15: ...uilds pressure but shuts down RESET light comes on User a Is the water level below the mid water level probe Verify that the water supply is sufficient to maintain the water level at or above the mid water level probe Authorized Service Rep Only b Is the operating pressure switch defective No adjustment is allowed Replace the switch if defective NOTE If the high limit pressure switch has shut down...

Page 16: ...7a Main Burner Assy 0 2000 Ft Elev Incl 29 Gas Jets W 54 Drill Dia Hole For Natural Gas 047267 7a Main Burner Assy 0 2000 Ft Elev Incl 29 Gas Jets W 68 Drill Dia Hole For Propane Gas 050491 8 Gas Valve Spark Ignition For Natural Gas 101497 8 Gas Valve Spark Ignition For Propane Gas 104391 9 Spark Ignition Module 085153 10 Ignition Cable 106495 11 Burner Mounting Bracket 050490 12 Kit Spark Ignitio...

Page 17: ...essure Relief Valve 12PSI 099228 7 Water Level Probes lo med hi 076526 8 Solenoid Valve Water in 099220 9 Check Valve 004187 10 Air Vent 145167 11 Vacuum Breaker 090787 12 Globe Valve 1 2 NPT 099255 13 Operating Pressure Switch 9 PSI 099222 14 Hi limit Pressure Switch 14 PSI 118255 15 Pressure Gauge 078000 16 Solenoid Valve Drain 074594 17 Ball Valve 3 4 NPT 003436 18 Thermostatic Switch 077985 ...

Page 18: ...al Block 2 Pole 003887 Bushing Snap 11 16 ID 012864 7 Circuit Board Support 099292 8 Water Level Control Board Assembly 116016 9 Lug Ground 14 6 AWG 119829 10 Circuit Breaker 119860 11 Transformer 75VAC 121715 12 Relay DPDT 24VAC 30A 121733 13 Water Level Control Board Assembly 122192 Harness Electrical Box 130446 14 Bracket Circuit Breaker 137254 15 Electronic Cabinet Weldment 137257 1 2 4 5 3 11...

Page 19: ...ED 11 WHITE P1 J1 1 TSTAT DRAIN VALVE 1 2 2 T1 LO 14 5 PSI OPERATING PRESSURE GAS VALVE 7 YELLOW 8 BLACK C HL 12 BLACK 10 BLACK 9 RED C PS SW H C G BLACK YELLOW BLUE WHITE 4 BLACK 6 BROWN 5 BLUE 3 BROWN PROBE NC NO NC PROBE LO G FILL VALVE PROBE MID HI 12 NO BROWN K1 C PC2 LLCO PC1 G 4 NC1 NO2 C1 C2 H LLCO G BROWN WHITE BLACK STEAMER 2 1 SPRAYVALVE FROM T2 COM STEAMER TO K7 COIL SINGLE WATER LEVEL...

Page 20: ...20 OM NGB Service Log Model No Purchased From Serial No Location Date Purchased Date Installed Purchase Order No For Service Call Date Maintenance Performed Performed By ...

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