Columbia HERITAGE series Service manual

105266-01 - 7/14
9700609
INSTALLATION, OPERATING
AND
SERVICE INSTRUCTIONS
HERITAGE™ SERIES
CAST IRON GAS-FIRED BOILER
For service or repairs to boiler, call your heating contractor. When seeking information on boiler,
provide Boiler Model Number and Serial Number as shown on Rating Label.
Boiler Model Number
HG0 _ _
Boiler Serial Number Installation Date
Heating Contractor Phone Number
Address

2
The following terms are used throughout this manual to bring attention to the presence of hazards of various
risk levels, or to important information concerning product life.
DANGER
Indicates an imminently hazardous situation
which, if not avoided, will result in death, serious
injury or substantial property damage.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, may result in moderate or minor
injury or property damage.
WARNING
Indicates a potentially hazardous situation which,
if not avoided, could result in death, serious injury
or substantial property damage.
NOTICE
Indicates special instructions on installation,
operation, or maintenance which are important
but not related to personal injury hazards.
Table 1A: Ratings
Boiler Model Supply NPT
(inch)
Return NPT
(inch) Vent (inch) Gas NPT (inch) Relief Valve NPT (inch)
Drain
NPT (inch)
HG02 1¼ 1¼ 4 ½ ¾ ¾
HG03 1¼ 1¼ 4 ½ ¾ ¾
HG04 1¼ 1¼ 5 ½ ¾ ¾
HG05 1¼ 1¼ 6 ½ ¾ ¾
HG06 1¼ 1¼ 6 ½ ¾ ¾
Table 1B: Dimensions and Connections
Heritage Gas Ratings
Boiler Model Input (MBH) DOE Heating Capacity (MBH) Net AHRI Rating Water (MBH) (1) AFUE (%)
HG02 37.5 30 26 82
HG03 62 50 44 82
HG04 96 78 68 82
HG05 130 106 92 82
HG06 164 134 116 82
(1) Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. Consult manufacturer before selecting
boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping
systems, etc.
The City of New York requires a Licensed Master Plumber supervise the installation of this product.
The Massachusetts Board of Plumbers and Gas Fitters has approved the Heritage™ Series Boiler. See the Massachusetts Board of
Plumbers and Gas Fitters website, http://license.reg.state.ma.us/pubLic/pl_products/pb_pre_form.asp for the latest Approval
Code or ask your local Sales Representative.
The Commonwealth of Massachusetts requires this product to be installed by a licensed Plumber or Gas tter.
Table of Contents
I. Pre-Installation....................................4
II. Unpack Boiler .....................................5
III. Water Piping and Trim ........................6
IV. Gas Piping...........................................9
V. Venting ..............................................10
VI. Electrical............................................12
VII. System Start-up and Checkout ..........15
VIII. Operation..........................................17
IX. Service and Maintenance ...................19
X. Troubleshooting ................................22
XI. Repair Parts.......................................24
Electrical Requirements: 120VAC, 60 Hz, 1-ph, 15A
Maximum Allowable Working Pressure - 50 psi. Boiler shipped from factory with a 30 psi relief valve.

3
Figure 1: Minimum Clearance to Combustible Materials
Boiler
Model
Shipping Weight
(lbs)
Water Content
(gal)
HG02 220 2.4
HG03 270 3.2
HG04 320 4.0
HG05 370 4.7
HG06 420 5.5
Table 1C: Weights and Volume

4
I. Pre-Installation
WARNING
Carefully read all instructions before installing
boiler. Failure to follow all instructions in proper
order can cause personal injury or death.
A. Inspect shipment carefully for any signs of damage.
All equipment is carefully manufactured, inspected
and packed. Our responsibility ceases upon delivery
of boiler to carrier in good condition. Any claim
for damage or shortage in shipment must be led
immediately against carrier by consignee. No claims
for variances or shortages will be allowed by Boiler
Manufacturer, unless presented within sixty (60) days
after receipt of equipment.
B. Installation must conform to the requirements of the
authority having jurisdiction. In the absence of such
requirements, installation must conform to National
Fuel Gas Code, ANSI Z223.1/NFPA 54. Where
required by the authority having jurisdiction, the
installation must conform to the Standard for Controls
and Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1.
C. Appliance is design certied for installation on
combustible ooring. The boiler must not be installed
on carpeting.
D. Provide clearance between boiler jacket and
combustible material in accordance with local re
ordinance. Refer to Figure 1 for minimum clearance
from combustible material for alcove installation.
Provide 1/2" clearance from water piping to
combustible materials.
E. Provide practical service clearances. A minimum
of 24" from the right side and front jacket panels is
recommended for servicing but may be reduced to
minimums shown in Figure 1.
F. Install on level oor. For basement installation provide
concrete base if oor is not level or if water may be
encountered on oor around boiler.
G. Protect gas ignition system components from
water (dripping, spraying, rain, etc.) during boiler
operation and service (circulator replacement, control
replacement, etc.).
H. Provide combustion and ventilation air in accordance
with the section "Air for Combustion and Ventilation,"
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54,
or applicable provisions of local building codes.
WARNING
Adequate combustion and ventilation air must be
provided to assure proper combustion.
The following guideline is based on the National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
1. Determine volume of space (boiler room). Rooms
communicating directly with space (through
openings not furnished with doors) are considered
part of space.
Volume [ft³] = Length [ft] x Width [ft] x Height [ft]
2. Determine Total Input of all appliances in space.
Round result to nearest 1,000 Btu per hour (Btuh).
3. Determine type of space. Divide Volume by Total
Input.
a. If result is greater than or equal to 50 ft³ per
1,000 Btuh, space is considered an unconned
space.
b. If result is less than 50 ft³ per 1,000 Btuh, space
is considered a conned space.
4. Determine building type. A building of unusually
tight construction has the following characteristics:
a. Walls and ceiling exposed to outside atmosphere
have a continuous water vapor retarder with a
rating of 1 perm or less with openings gasketed
and sealed, and;
b. Weather-stripping has been added on openable
windows and doors, and;
c. Caulking or sealants applied in joints around
window and door frames, between sole
plates and oors, between wall-ceiling joints,
between wall panels, at plumbing and electrical
penetrations, and at other openings.
5. For boiler located in an unconned space in a
building of other than unusually tight construction,
adequate combustion and ventilation air is normally
provided by fresh air inltration through cracks
around windows and doors.
6. For boiler located within unconned space in
building of unusually tight construction or within
conned space, provide outdoor air through two
permanent openings which communicate directly or
by duct with the outdoors or spaces (crawl or attic)
freely communicating with the outdoors. Locate one
opening within 12 inches of top of space. Locate
remaining opening within 12 inches of bottom of
space. Minimum dimension of air opening is 3
inches. Size each opening per following:

5
a. Direct communication with outdoors. Minimum
free area of 1 square inch per 4,000 Btu per hour
input of all equipment in space.
b. Vertical ducts. Minimum free area of 1 square
inch per 4,000 Btu per hour input of all
equipment in space. Duct cross-sectional area
shall be same as opening free area.
c. Horizontal ducts. Minimum free area of 1
square inch per 2,000 Btu per hour input of all
equipment in space. Duct cross-sectional area
shall be same as opening free area.
Alternate method for boiler located within conned
space. Use indoor air if two permanent openings
communicate directly with additional space(s) of
sufcient volume such that combined volume of all
spaces meet criteria for unconned space. Size each
opening for minimum free area of 1 square inch per
1,000 Btu per hour input of all equipment in spaces,
but not less than 100 square inches.
7. Ventilation Duct Louvers and Grilles. Equip outside
openings with louvers to prevent entrance of rain
and snow, and screens to prevent entrance of insects
II. Unpack Boiler
CAUTION
Do not drop boiler. Do not bump boiler jacket
against oor.
A. Move boiler to approximate installed position.
B. Remove all crate fasteners.
C. Lift outside container and remove with all other
inside protective spacers and bracing. Save two of the
wooden slats from the container sleeve for use in Steps
E and F.
D. Remove all boiler hold-down fasteners.
E. Tilt the boiler to one side and slide a wooden slat under
the two raised feet.
F. Tilt the boiler to the other side and slide another
wooden slat under the two raised feet.
G. Slide the boiler forward or backward off the skid using
the two wooden slats as runners.
H. Move boiler to its permanent location.
I. Pre-Installation (continued)
and rodents. Louvers and grilles must be xed in
open position or interlocked with equipment to open
automatically before burner operation. Screens must
not be smaller than ¼ inch mesh.
Consider the blocking effect of louvers, grilles and
screens when calculating the opening size to provide
the required free area. If free area of louver or grille
is not known, assume wood louvers have 20-25
percent free area and metal louvers and grilles have
60-75 percent free area.
I.Do not install boiler where gasoline or other
ammable vapors or liquids, or sources of
hydrocarbons (i.e. bleaches, cleaners, chemicals, sprays,
paint removers, fabric softeners, etc.) are used or stored.

6
III. Water Piping and Trim
WARNING
Failure to properly pipe boiler may result in
improper operation and damage to boiler or
building.
A. Design and install boiler and system piping to
prevent oxygen contamination of boiler water.
Oxygen contamination sources are system leaks
requiring addition of makeup water, ttings, and
oxygen permeable materials in distribution system.
Eliminate oxygen contamination by repairing system
leaks, repairing ttings, and using non-permeable
materials in distribution system.
B. Install circulator with anges, gaskets and bolts
provided.
C. Install Safety Relief Valve. See Figure 2. Safety Relief
Valve must be installed with spindle in vertical position.
WARNING
Safety relief valve discharge piping must be
piped near oor to eliminate potential of severe
burns. Do not pipe in any area where freezing
could occur. Do not install any shut-off valves.
D. Connect system supply and return piping to boiler.
Refer to Figures 2, 3, 4, & 5. Maintain minimum ½
inch clearance from hot water piping to combustible
materials.
E. If boiler is used in connection with refrigeration
systems, boiler must be installed with chilled medium
piped in parallel with the heating boiler using
appropriate valves to prevent chilled medium from
entering boiler. See Figure 3.
F. If boiler is connected to heating coils located in
air handling units where they may be exposed to
refrigerated air, boiler piping must be equipped with
ow control valves or other automatic means to prevent
gravity circulation of boiler water during operation of
cooling system.
G. Use a boiler bypass if the boiler is to be operated
in a system which has a large volume or excessive
radiation where low boiler water temperatures may be
encountered (i.e. converted gravity circulation system,
etc.).
Remove circulator and install pipe tee between
circulator and boiler return along with second tee in
supply piping as shown in Figures 4 and 5. Bypass
should be same size as the supply and return lines with
valves located in bypass and supply outlet as illustrated
in Figures 4 and 5 in order to regulate water ow to
maintain higher boiler water temperatures.
Set by-pass and boiler supply valves to half throttle
position to start. Operate boiler until system water
temperature reaches normal operating range.
Adjust valves to provide 180° to 200°F supply water
temperature. Opening the boiler supply valve will raise
system temperature, while opening by-pass valve will
lower system supply temperature.
H. If it is required to perform a long term pressure
test of the hydronic system, the boiler should rst be
isolated to avoid a pressure loss due to the escape of air
trapped in the boiler.
To perform a long term pressure test including the
boiler, ALL trapped air must rst be removed from the
boiler.
A loss of pressure during such a test, with no visible
water leakage, is an indication that the boiler contained
trapped air.
Figure 2: Near Boiler Piping
Figure 3: Recommended Piping for Combination
Heating & Cooling (Refrigeration) Systems

7
Figure 4: Recommended Water Piping for Zone Valve Zoned Heating Systems
III. Water Piping and Trim (continued)

8
Figure 5: Recommended Water Piping for Circulator Zoned Heating Systems
III. Water Piping and Trim (continued)

9
A. Size gas piping. Design system to provide adequate gas
supply to boiler. Consider these factors:
1. Allowable pressure drop from point of delivery to
boiler. Maximum allowable system pressure is ½
psig. Actual point of delivery pressure may be less;
contact gas supplier for additional information.
Minimum gas valve inlet pressure is listed on rating
label.
2. Maximum gas demand. Consider existing and
expected future gas utilization equipment (i.e. water
heater, cooking equipment).
B. Connect boiler gas valve to gas supply system.
1. Use methods and materials in accordance with local
plumbing codes and requirements of gas supplier. In
absence of such requirements, follow National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
2. Use thread (joint) compounds (pipe dope) resistant
to action of liqueed petroleum gas.
3. Install sediment trap, ground-joint union and manual
shut-off valve upstream of boiler gas control valve.
See Figure 6.
IV. Gas Piping
Figure 6: Pilot and Gas Piping
4. All above ground gas piping upstream from manual
shut-off valve must be electrically continuous and
bonded to a grounding electrode. Do not use gas
piping as grounding electrode. Refer to National
Electrical Code, ANSI/NFPA 70.
C. Pressure test. The boiler and its gas connection must
be leak tested before placing boiler in operation.
1. Protect boiler gas control valve. For all testing over
½ psig, boiler and its individual shutoff valve must
be disconnected from gas supply piping. For testing
at ½ psig or less, isolate boiler from gas supply
piping by closing boiler's individual manual shutoff
valve.
2. Locate leaks using approved combustible gas
detector, soap and water, or similar nonammable
solution. Do not use matches, candles, open ames,
or other ignition source.

10
V. Venting
A. Install vent system in accordance with "Venting of
Equipment" of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, or applicable provisions of local
building codes. Install any of the following for this
Heritage Series Category I, draft hood equipped
appliance:
1. Type B or Type L gas vent. Install in accordance
with listing and manufacturer's instructions.
2. Masonry or metal chimney. Build and install in
accordance with local building codes; or local
authority having jurisdiction; or Standard for
Chimneys, Fireplaces, Vents, and Solid Fuel
Burning Appliances, ANSI/NFPA 211.
Masonry chimney must be lined with approved clay
ue lining or listed chimney lining system.
3. Single wall metal vent. Allowed by ANSI Z223.1/
NFPA 54 under very restrictive conditions.
4. Do not use cellular core PVC (ASTM F891),
cellular core CPVC, or Radel®(polyphenolsulfone).
5. Do not cover non-metallic vent pipe and ttings
with thermal insulation. Note: Non-metallic vent
cannot be used with this boiler.
B. Inspect chimney and remove any obstructions or
restrictions. Clean chimney if previously used for solid
or liquid fuel-burning appliances or replaces.
DANGER
Inspect existing chimney before installing boiler.
Failure to clean or replace perforated pipe or tile
lining will cause severe injury or death.
C. Install Vent Damper
OPEN THE VENT DAMPER CARTON and remove the
Installation Instructions. READ THE INSTALLATION
INSTRUCTIONS THOROUGHLY before proceeding.
The automatic gas control valve supplied on each
Heritage Series boiler provides the redundancy
referenced in the vent damper Installation Instructions.
CAUTION
Do not use one vent damper to control two heating
appliances.
1. The vent damper must be the same size as the outlet
of the Draft Hood supplied with the boiler (see
Table 1B). Unpack the damper carefully - DO NOT
FORCE IT CLOSED! Forcing the damper may
damage the gear train and void the warranty.
2. Mount the vent damper assembly onto the canopy/
diverter. (Refer to Figure 7 and to instructions
packed with the vent damper) for specic
instructions). Do not modify either the draft hood or
vent damper.
NOTICE
Provide adequate clearance for servicing.
3. Locate vent damper position indicating means to be
visible following installation.
WARNING
Provide 6" minimum clearance between damper
and combustible construction.
4. Plug the factory harness vent damper connector into
damper motor polarized receptacle.
Figure 7: Vent Damper Installation

11
D. Install Vent Connector
1. Install vent connector from vent damper outlet to
chimney.
2. Vent connectors serving appliances vented by
natural draft shall not be connected into any portion
of mechanical draft systems operating under positive
pressure.
3. Do not connect into same leg of chimney serving an
open replace.
4. Inspect chimney for obstructions or restrictions and
remove. Clean chimney if necessary.
5. Vent pipe to chimney must not be smaller than outlet
on draft hood or damper. Type B Vent Connector is
recommended. The venting system must be arranged
so that only the boiler is served by the damper
device. Installation per paragraph (C) complies with
this provision.
6. Vent pipe should have the greatest possible initial
rise above the draft hood consistent with the head
room available and the required clearance from
adjacent combustible building structure. Vent Pipe
should be installed above the bottom of chimney to
prevent blockage.
7. Vent pipe should slope upward from draft hood to
vent terminal not less than 1/4" per foot.
8. Support horizontal portions of venting system
to prevent sagging. Use pipe straps, brackets or
hangers spaced 4 ft. or less.
9. Vent pipe must be inserted into but not beyond
inside wall of chimney liner. Seal tight between vent
pipe and chimney.
10. Do not install non-listed (AGA, CGA, CSA, ETL or
UL) vent damper or other obstruction in vent pipe.
WARNING
E. If an Existing Boiler is Removed:
When an existing boiler is removed from a common
venting system, the common venting system is likely
to be too large for proper venting of the appliances
remaining connected to it.
At the time of removal of an existing boiler, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances
remaining connected to the common venting system are
not in operation:
V. Venting (continued)
a. Seal any unused openings in the common venting
system.
b. Visually inspect the venting system for proper
size and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion, and other
deciencies which could cause an unsafe condition.
c. Insofar as is practical, close all building doors and
windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on clothes dryers and any appliance
not connected to the common venting system.
Turn on any exhaust fans, such as range hoods and
bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan. Close
replace dampers.
d. Place in operation the appliance being inspected.
Follow the Lighting (or Operating) Instructions.
Adjust thermostat so appliance will operate
continuously.
e. Test for spillage at the draft hood relief opening after
5 minutes of main burner operation. Use the ame
of a match or candle, or smoke from a cigarette,
cigar or pipe.
f. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, win dows, exhaust fans, replace dampers and
any other gas-burning appliance to their previous
condition of use.
g. Any improper operation of the common venting
system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54. When resizing any portion of
the common venting system, the common venting
system should be resized to approach the minimum
size as determined using the appropriate tables in
Chapter 13 of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54.

12
VI. Electrical
A. General. Install wiring and electrically bond boiler to
ground in accordance with requirements of authority
having jurisdiction, or in absence of such requirements,
with the National Electrical Code, ANSI/NFPA 70.
B. Install thermostat. Locate on inside wall
approximately 4 feet above oor. Do not install on
outside wall, near replace, or where inuenced by
drafts or restricted air ow, hot or cold water pipes,
lighting xtures, television, or sunlight. Allow free air
movement by avoiding placement of furniture near
thermostat.
C. Wire boiler. Boiler is rated for 120 VAC, 60 hertz,
less than 15 amperes. A separate electrical circuit
must be run from the main electrical service with an
over-current device/disconnect in the circuit. A service
switch is recommended and may be required by some
local jurisdictions. Connect to L1, L2 and green ground
screw. See Figures 8 and 9.
D. For installations using zone valves provide separate
transformer for zone valve wiring. Consult zone valve
manufacturer for assistance.
CAUTION
This boiler contains controls which may cause
the boiler to shut down and not restart without
service. If damage due to frozen pipes is a
possibility, the heating system should not be
left unattended in cold weather; or appropriate
safeguards and alarms should be installed on the
heating system to prevent damage if the boiler is
inoperative.

13
Figure 8: Wiring Connection Diagram
VI. Electrical (continued)

14
Figure 9: Schematic Ladder Diagram
VI. Electrical (continued)

15
VII. System Start-up and Checkout
A.Main Burner Check - Check main burners to see
that they were not dislodged during shipment. Rear
of burners should be in the vertical slots in the rear of
burner tray and the front of the burners should be seated
completely on the orices.
B. Initial start -
1. Fill entire heating system with water and vent
air from system. Use the following procedure on a
System equipped with zone valves.
a. Close isolation valve in boiler supply piping.
b. Isolate all circuits by closing zone valves or
balancing valves.
c. Attach a hose to hose bib located just below
isolation valve in boiler supply piping. (Note
- Terminate hose in ve gallon bucket, at a
suitable oor drain, or outdoor area).
d. Starting with one circuit, open zone valve.
e. Open hose bib.
f. Open ll valve (Make-up water line should be
located directly above isolation valve in boiler
supply piping).
g. Allow water to overow from bucket until
discharge from hose is bubble free for 30
seconds.
h. Open zone valve to the second zone to be
purged, then close the rst. Repeat this step until
all zones have been purged, but always have one
zone open. At completion, open all zone valves.
i. Close hose bib, continue lling the system
until the pressure gauge reads 12 psi. Close ll
valve. (Note - If make-up water line is equipped
with pressure reducing valve, system will
automatically ll to 12 psi. Leave globe valve
open).
j. Open isolation valve in boiler supply piping.
k. Remove hose from hose bib.
2. Turn ROOM THERMOSTAT to lowest setting.
3. Be sure that gas to pilot and main burners has been
off for at least ve minutes and vent damper has
been in the open position.
4. Turn "OFF" the electric switch serving boiler.
5. Open valve on main gas line at meter.
6. PURGE AIR FROM GAS PIPING. Adequate
ventilation must be provided and no smoking or
open ame permitted.
7. Turn "ON" electric switch serving boiler.
8. Open Manual Shut-off Valve upstream of
Combination Gas Valve.
9. Loosen or remove Inlet Pressure Tap Plug in
Combination Gas Valve and when purging is
complete, tighten or replace plug. (See Figure 10).
Figure 10: Top View of Honeywell Gas Valves
10. Check pipe and ttings from meter to Combination
Gas Valve using soap solution or other approved
methods.
CAUTION
11. Test gas piping and connections between
Combination Gas Valve and manifold, orices, and
pilot piping for leaks after boiler is operating. Use
soap solution or other approved method.
C. Check Gas Input to Boiler
1. Input Rate and Maximum Inlet Pressure shown on
Rating Label must not be exceeded. Inlet pressure
must not be lower than minimum inlet pressure
shown on Rating Label.
2. All Rate checks and all adjustments are to be made
while boiler is ring - all other appliances connected
to the same meter as the boiler must be off.
3. With boiler off, water Manometer or water column
gauge should be connected to a shut-off valve
installed in the 1/8" outlet pressure tap in the gas
valve (See Figure 10). By installing gas valve
upstream of manometer, gas pressure can be
introduced gradually - without shut-off valve; surge
of pressure when boiler is turned on, could blow
liquid out of manometer. Replace plug in gas valve
when rate check is nished.
4. LP Gas Input:
Adjust Regulator on Gas Valve so that manifold
pressure is 10 inches water column. Turning
Regulator Adjusting Screw Clockwise increases
pressure. Counterclockwise rotation decreases
pressure.

16
5. Natural Gas Input
a. Approx. Input - Adjust regulator on Gas Valve
so that manifold pressure is 3½ inches water
column. Turning Regulator Adjusting Screw
Clockwise increases pressure, Counter-clockwise
rotation decreases pressure.
D. Check Main Burner Flame. See Figure 11. Flame
should have a clearly dened inner cone with no yellow
tipping. Orange-yellow streaks caused by dust should
not be confused with true yellow tipping.
Figure 11: 1 Inch Main Burner Flame
CAUTION
Avoid operating this boiler in an environment
where saw dust, loose insulation bers, dry wall
dust, etc. are present. If boiler is operated under
these conditions, the burner interior and ports
must be cleaned and inspected daily to insure
proper operation.
VII. System Start-up and Checkout (continued)
E. Check Pilot Burner Flame.
1. See Figure 12. The pilot burner should be lit only
if thermostat is calling for heat. The pilot burner
produces three (3) ames. The center ame should
be steady, medium hard blue enveloping 3/8 to 1/2
inch of thermocouple.
F. Check Ignition System Safety Shut-off Device.
Remove 3-wire plug from gas valve.
If burners do not shut down determine cause of
malfunction. Replace necessary items and check
operation.
Figure 12: Pilot Burner Flame
G. Check Vent Damper Operation. Vent Damper must
be in open position when main burners are operating.
H. Check High Limit Control.
Jumper Thermostat connections 'T' and 'TV' in
HydroStat Control. See Figures 8 and 9. Allow
burners to operate until shutdown by limit. REMOVE
JUMPER.
I. Check Thermostat Operation. Raise and lower
temperature setting to start and stop boiler operation.
Adjust thermostat to normal setting.
J.Combustion Chamber Burn-off
1. The mineral wool combustion chamber panels
may contain a cornstarch based binder that must be
burned out at installation to prevent odors during
subsequent boiler operation.
2. Ventilate the boiler room, set the high limit to its
maximum setting, set the thermostat to call for heat.
Allow the boiler to re for at least an hour or until
the odor from the cornstarch has dissipated.
3. Return the high limit and thermostat to their desired
settings.
K. Review User's Information Manual and system
operation with owner or operator.
L. Post instructions near boiler for reference by owner
and service personnel.

17
VIII. Operation
A. Temperature Limit/LWCO Control
Refer to the HydroStat 3200 Installation Instructions
and Operating Manual included with these instructions.
B. Electronic Ignition Module
See Figure 13 for electronic ignition (EI). Electronic
Ignition Modules with LED indicators. Table 2 cross-
references the ignition module terminal designations
to the ignition terminal numbers in the wiring ladder
diagrams. Table 3 provides green LED status codes
and recommended service action where applicable..
See Figure 13 for Location of LED. See Figure 16 for
Troubleshooting Guide.
Figure 13: Location of LED
Table 2: Ignition Module Terminal Cross-
Reference
Figure 14: Measuring Pilot Flame Current
with Micro-ammeter
Ignition Module
Terminal Designation
Wiring Ladder Diagram
Terminal Number
MV 1
MV/PV 2
PV 3
GND 4
24V (GND) 5
24V 6
SPARK SPARK
1. Flame Current Measurement Procedure. See
Figure 14 “Measuring pilot ame current with
micro-ammeter”
a. Pilot ame current in micro amps can be
measured using any standard micro-ammeter
by inserting the meter probes into the
module holes labeled FLAME CURRENT
as shown in Figure 14.
b. Flame current must be measured with pilot
valve open/pilot lit but the main valve
closed.
c. Disconnect MV lead wire from the module
before measuring ame current. Trying to
measure the pilot ame current in series
with the wiring will not yield the accurate
reading.
d. The minimum steady pilot ame signal
must be 1 μAmp (microampere) DC (direct
current).
e. For reliable operation the ame current
should be 2 μAmp or greater.
f. To ensure adequate ame current:
i. Turn off boiler power at circuit breaker
or fuse box
ii. Clean the ame rod with emery cloth if
required
iii. Make sure electrical connections are
clean and tight, and wiring not damaged,
repair/replace as needed
iv. Check for igniter/sensor cracked ceramic
insulator, replace if needed

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v. Check the pilot ame. It must be blue,
steady and envelop the ame sensing rod
3/8” to ½”.
vi. If needed, adjust pilot ame by
turning the gas valve pilot adjustment
screw clockwise to decrease or
counterclockwise to increase pilot
ame. Always reinstall pilot adjustment
screw cover and tighten securely upon
completion to assure proper gas valve
operation.
g. Reconnect MV lead wire to the module
upon satisfactory completion of pilot ame
current measurement.
VIII. Operation (continued)
Table 3: Green LED Flame Codes
Green LED
Flash
Codea
Indicates Next System Action Recommended Service Action
OFF No “Call for Heat” N/A None
Flash Fast Power up - internal check N/A None
Heartbeat Normal startup - ignition sequence
started (including prepurge) N/A None
4 Seconds ON
then “x” ashes
Device in run mode.
“x” = ame current to the nearest µA. N/A None
2
5 minute Retry Delay
- Pilot ame not detected during trial for
ignition
Initiate new trial for ignition after retry
delay completed.
If system fails to light on next trial for ignition
check gas supply, pilot burner, spark and
ame sense wiring, ame rod contamination or
out of position, burner ground connection.
3Recycle
- Flame failed during run
Initiate new trial for ignition. Flash code
will remain through the ignition trial until
ame is proved.
If system fails to light on next trial for ignition,
check gas supply, pilot burner, ame sense
wiring, contamination of ame rod, burner
ground connection.
4 Flame sensed out of sequence
If situation self corrects within 10
seconds, control returns to normal
sequence. If ame out of sequence
remains longer than 10 seconds, control
will resume normal operation 1 hour
after error is corrected.
Check for pilot ame. Replace gas valve if pi-
lot ame present. If no pilot ame, cycle “Call
for Heat.” If error repeats, replace control.
6 Control Internal Error
Control remains in wait mode. When
the fault corrects, control resumes
normal operation.
Cycle “Call for Heat”. If error repeats, replace
control.
7 Flame rod shorted to ground
Control remains in wait mode. When
the fault corrects, control resumes
normal operation.
Check ame sense lead wire for damage or
shorting. Check that ame rod is in proper
position. Check ame rod ceramic for cracks,
damage or tracking.
8Low secondary voltage supply- (below
15.5 Vac)
Control remains in wait mode. When
the fault corrects, control resumes
normal operation.
Check transformer and AC line for proper input
voltage to the control. Check with full system
load on the transformer.
aFlash Code Descriptions:
- Flash Fast: rapid blinking
- Heartbeat: Constant ½ second bright, ½ second dim cycles.
- 4 second solid on pulse followed by “x” 1 second ashes indicates ame current to the nearest µA. This is only available in run mode.
- A single ash code number signies that the LED ashes X times at 2Hz, remains off for two seconds, and then repeats the sequence.
h. Check the pilot burner operation/ignition
sequence during ignition cycle:
i. Restore boiler power at circuit breaker or
fuse box.
ii. Set thermostat to call for heat.
iii. Watch ignition sequence at burner.
iv. If spark does not stop after pilot lights,
replace ignition module.
v. If main burners do not light or if main
burners light but system locks out, check
the module ground wire and gas control
as described in Figure 16 “ Honeywell
Electronic Ignition Troubleshooting
Guide”.

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IX. Service and Maintenance
Important Product Safety Information
Refractory Ceramic Fiber Product
Warning:
The Repair Parts list designates parts that contain refractory ceramic fibers
(RCF). RCF has been classified as a possible human carcinogen. When
exposed to temperatures above 1805°F, such as during direct flame contact,
RCF changes into crystalline silica, a known carcinogen. When disturbed as a
result of servicing or repair, these substances become airborne and, if inhaled,
may be hazardous to your health.
AVOID Breathing Fiber Particulates and Dust
Precautionary Measures:
Do not remove or replace RCF parts or attempt any service or repair work
involving RCF without wearing the following protective gear:
1. A National Institute for Occupational Safety and Health (NIOSH)
approved respirator
2. Long sleeved, loose fitting clothing
3. Gloves
4. Eye Protection
•Take steps to assure adequate ventilation.
•Wash all exposed body areas gently with soap and water after contact.
•Wash work clothes separately from other laundry and rinse washing
machine after use to avoid contaminating other clothes.
•Discard used RCF components by sealing in an airtight plastic bag. RCF
and crystalline silica are not classified as hazardous wastes in the United
States and Canada.
First Aid Procedures:
•If contact with eyes: Flush with water for at least 15 minutes. Seek
immediate medical attention if irritation persists.
•If contact with skin: Wash affected area gently with soap and water.
Seek immediate medical attention if irritation persists.
•If breathing difficulty develops: Leave the area and move to a location
with clean fresh air. Seek immediate medical attention if breathing
difficulties persist.
•Ingestion: Do not induce vomiting. Drink plenty of water. Seek
immediate medical attention.

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Figure 15: Operating Instructions
IX. Service and Maintenance (continued)