Groen NGB-3 Installation Manual
? IMPORTANT INFORMATION ? KEEP FOR OPERATOR ? IMPORTANT INFORMATION ?
OPERATOR MANUAL OM-NGB/3(S)
CSD-1 FIELD INSTALLATION SUPPLEMENT
Part Number 123490 DOMESTIC
Model: NGB/3, NGB/3/E
Steam Boilers — CSD-1 Kit
Gas Heated
200,000 BTU/hr firing rate
120,000 BTU into product
3.7 effective boiler horsepower
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF
THIS OR ANY OTHER APPLIANCE.
READ THE BASIC OPERATOR MANUAL, AND INSTALLATION, OPERATING AND MAINTENANCE
INSTRUCTIONS THOROUGHLY BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.
POST IN A PROMINENT LOCATION
INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER SMELLS GAS. THIS INFORMATION SHALL
BE OBTAINED BY CONSULTING YOUR LOCAL GAS SUPPLIER. AS A MINIMUM, IMMEDIATELY TURN
OFF THE GAS AND CALL YOUR GAS COMPANY AND YOUR AUTHORIZED SERVICE AGENT.
EVACUATE ALL PERSONNEL FROM THE AREA.
WARNING
IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE
PROPERTY DAMAGE, INJURY OR DEATH.
Information contained in this document is
known to be current and accurate at the time
of printing/creation. Unified Brands recommends referencing our product line websites,
unifiedbrands.net, for the most updated
product information and specifications.
OM-NGB/3(S)
IMPORTANT — READ FIRST — IMPORTANT
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH GAS,
ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION CAN CAUSE INJURY TO
PERSONNEL AND/OR DAMAGE TO THE EQUIPMENT. THE UNIT MUST BE INSTALLED IN
ACCORDANCE WITH APPLICABLE CODES.
CAUTION: AN ELECTRICAL GROUND IS REQUIRED.
CAUTION: DO NOT LOCATE THE BOILER CABINET DIRECTLY OVER A FLOOR DRAIN OR FLOOR
SINK. HUMIDITY OR WATER FROM A DRAIN WILL DAMAGE ELECTRICAL PARTS OF A
UNIT.
WARNING: TO AVOID DAMAGE OR INJURY, FOLLOW THE WIRING DIAGRAM EXACTLY WHEN
CONNECTING A UNIT.
CAUTION: DO NOT USE PLASTIC PIPE. DRAIN MUST BE RATED FOR STEAM AND BOILING WATER.
WARNING: DO NOT CONNECT THE DRAIN DIRECTLY TO A BUILDING DRAIN.
WARNING: BLOCKING THE DRAIN MAY BE HAZARDOUS.
IMPORTANT: Improper drain connection will void warranty.
WARNING: ALLOW COOKING CHAMBERS TO COOL BEFORE CLEANING.
WARNING: CAREFULLY READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON THE LABEL OF
EACH CLEANING AGENT. USE SAFETY GLASSES AND RUBBER GLOVES AS
RECOMMENDED BY DELIMING AGENT MANUFACTURER.
WARNING: DO NOT MIX DE-LIMING AGENTS (ACID) AND DE-GREASERS (ALKALI) IN THE STEAM
GENERATOR OR ON THE COOKING CHAMBER WALLS.
NOTICE: Do not use a cleaning or de-liming agent that contains any sulfamic acid or any chloride,
including hydrochloric acid (HCl). If the chloride content of any product is unclear, consult
the manufacturer.
NOTICE: Do not use a de-greaser that contains potassium hydroxide or sodium hydroxide or that is
highly alkaline.
WARNING: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY GROEN OR
THEIR AUTHORIZED DISTRIBUTOR VOIDS ALL WARRANTIES AND CAN CAUSE BODILY
INJURY TO THE OPERATOR AND DAMAGE THE EQUIPMENT. SERVICE PERFORMED BY
OTHER THAN FACTORY-AUTHORIZED PERSONNEL WILL VOID ALL WARRANTIES.
WARNING: HIGH VOLTAGE EXISTS INSIDE CONTROL COMPARTMENTS. DISCONNECT FROM
BRANCH BEFORE SERVICING. FAILURE TO DO SO CAN RESULT IN SERIOUS INJURY OR
DEATH.
WARNING: DO NOT EXPOSE SKIN TO ESCAPING STEAM. SEVERE BURNS CAN RESULT.
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OM-NGB/3(S)
Introduction
This document supplements the basic OM-NGB/3 Operator Manual by providing instructions for modifying boilers
with a new A.S.M.E. CSD-1 code-compliant control system. Performing this modification alters the boiler system
as described in OM-NGB/3-E Supplement New Boiler Control System (Part Number 133530), which is
incorporated into this supplement as Section II, Operation. Other than the instructions in that supplement/ section,
the provisions of OM-NGB/3 apply.
Section I - Installation Instructions
WARNING
THIS MODIFICATION MUST BE MADE BY PERSONNEL WHO ARE WELL-QUALIFIED TO WORK WITH
ELECTRICITY. IMPROPER MODIFICATIONS CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO
EQUIPMENT. THE UNIT MUST BE INSTALLED IN COMPLIANCE WITH APPLICABLE CODES.
THE BOILER MUST BE THOROUGHLY TESTED FOLLOWING MODIFICATION, AS DIRECTED IN THIS
SUPPLEMENT, TO ENSURE THAT CONNECTIONS WERE PROPERLY MADE AND TO PREVENT
HAZARDOUS CONDITIONS.
A. REMOVAL (Refer to the schematic appropriate
to the unit).
1. Turn off unit and completely disconnect power at
its source.
2. Shut off the gas supply in the line leading to the
unit or at the main valve.
3. If the unit has water in the boiler at the time of
shut-down, it will drain.
WARNING
THE OUTSIDE OF THE BOILER MAY BE VERY
HOT AND CAN CAUSE BURNS. COOL OR
ALLOW THE BOILER TO COOL COMPLETELY
BEFORE PROCEEDING.
(Note: Draining by cutting off power can be used to
cool the boiler more rapidly: Once it has drained,
reconnect the power and allow the unit to fill with
cold water. Repeat this process until the unit is
cool.) Be sure to turn the unit off and disconnect
from power before any wiring is disturbed.
4. Remove the side panels.
5. Cut wire ties which are holding wiring harnesses
located at the left side of the control box, along
the top left of the front control panel and along
the left side of the unit frame tubing. Use pliers
to cut the wire ties.
6. Disconnect the wiring from the boiler shell,
probes, front panel, and drain valve, noting
Remove the wire ties to disconnect wiring.
location and markings of the wires.
Disconnect the wiring from the gas valve and the
spark ignition module, but DO NOT disconnect
the wiring which runs directly from the module to
the gas valve. (These wires are a separate
three-wire harness which will be reused in the
new installation). DO NOT disconnect the large
orange spark ignition lead wire.
7. Remove the four screws that attach the spark
ignition module to its bracket. This will allow
access to the pressure switch enclosure located
directly above the module.
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OM-NGB/3(S)
8. Remove the cover from the pressure switch
enclosure.
9. Loosen the screws and remove the wires from
the pressure switches. Note that the high limit
switch is toward the rear of the unit and that its
wiring is marked PSH. The operating pressure
switch is toward the front of the unit. Its wiring is
marked PSL. Remove the wires from the
pressure switch enclosure.
10. Remove high limit pressure switch P/N 099223
and replace with P/N 118255 supplied with kit.
11. Remove the cover from the main electrical
control box.
NOTE: If the unit does not have HyPLUS steamer
cavities installed, skip steps 12, 13 and 14)
12. Disconnect the three wiring plug terminals that
come from the steamer cavities, noting the
markings on each. These are located in the
conduit that comes from the steamer cavities at
the right side of the control box facing the right
side of the boiler cabinet.
13. Loosen the screws on the transformer labeled
H1 and H2 and remove the two fork terminals
that lead to the steamer cavities. (Note: see
Installation Step 3, below, if terminal H2 is not
used in unit installation).
14. Remove the conduit connector nut and the
conduit connector and its wiring from the control
box.
2. Mount the transformer into the new control box
using the four mounting screws.
3. Connect wiring to the transformer at terminals
XF, X2, H1, and H2. Note that the X2 terminal
has a wire labeled X2 and a green ground wire.
Also note that the H3 or H4 terminals may be
used in your installation if unit supply voltage is
other than 120 Volts. The H2 terminal is for 120
Volt installations.
4. Place the control box in the cabinet and mount it
with four screws.
5. Install the conduit connector at the right of the
control box and attach the wiring plug and fork
terminals that were removed in steps 11, 12, and
13. Connections are the same as for the
previous installation.
6. Connect wiring to the fill valve, spray valve,
thermostat switch, spark ignition module, and
gas valve.
7. Insert the six wires with fork terminals into the
pressure switch enclosure. Using the pressure
switch that was removed for reference, attach
the three terminals marked PSH to the high limit
pressure switch. Attach the two terminals
marked PSL to the operating pressure switch.
8. Loosen the screw that attaches the pressure
switch enclosure to the bracket at the left side of
15. Remove the four mounting screws at the bottom
of control box which attach the box to the cabinet
frame.
16. Remove the control box and any wires which
may still be connected.
17. Loosen the screws labeled X1 and XF on the
transformer and remove the transformer wiring.
Remove the four mounting screws which hold
the transformer and disconnect the transformer
from the old control box.
18. Remove power cord and its connector from the
old control box.
B. INSTALLATION(Refer to the appropriate
schematic at the back of this supplement).
1. Install power cord and connector in new control
box.
All wiring must be reconnected when the new
control box is installed.
box. Do not remove! Place the remaining
terminal marked BLR – GND behind this screw
and tighten the screw.
9. Mount the spark ignition module using four
screws.
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