HydroTherm PB User manual

PB SERIES
BOILER-BURNER UNIT
STEAM OR HOT WATER
INSTALLATION AND OPERATING INSTRUCTIONS
DESIGNED AND TESTED ACCORDING TO THE A.S.M.E. BOILER AND PRESSURE VESSEL CODE, SECTION IV
FOR MAXIMUM ALLOWABLE WORKING PRESSURE. STEAM 15 LBS. - WATER 40 LBS.
*Insert S for steam, ST for steam with tankless coil.
Insert W for water, WT for water with tankless coil.
The ratings are based on a allowance of 1.333 for steam or 1.15 for water.
The manufacturer should be consulted before selecting a boiler for installations having unusual piping and pickup
requirements, such as, intermittent system operation, extensive piping systems, etc.
CAUTION - DO NOT USE AUTOMOTIVE ANTI-FREEZE IN BOILER WATERWAYS. IF NECESSARY TO USE
ANTI-FREEZE, BE SURE TO EMPLOY A PREPARATION DESIGNED FOR HYDRONIC HEATING SYSTEMS SUCH
AS ETHYLENE OR PROPYLENE GLYCOL.
THESE INSTRUCTIONS TO BE KEPT WITH THE BOILER FOR REFERENCE PURPOSES.
HPB9-6
Boiler
Model
Number
DOE
Heating
Capacity
MBH
I=B=R
Burner Capacity
Oil Input
I=B=R Net Ratings
Steam Water
MBH
Natural
Draft
Chimney
Relief
Valve
Capacity
Lbs/Hr
GPH MBH SQ. FT. MBH
91
113
133
150
169
203
211
249
105
133
154
175
196
238
245
294
283
350
413
467
525
633
654
775
68
84
99
112
126
152
157
186
.75
.95
1.10
1.25
1.40
1.70
1.75
2.10
79
98
116
130
147
177
183
217
122
176
230
283
8" X 8" X 18'
8" X 8" X 17'
8" X 8" X 16'
8" X 8" X 15'
PB-105*
PB-120*
PB-150*
PB-180*
PB-200*
PB-235*
PB-245*
PB-295*
IN UNITED STATES: 260 NORTH ELM ST., WESTFIELD, MA 01085 • [phone] FAX [phone]
IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO L5S 1L4 • [phone] FAX [phone]

Ref Part
No. No. Description
1 BM-2038 Complete Jacket (-105, -120)
BM-2039 (-150, -180)
BM-2040 (-200, -235)
BM-2041 (-245, -295)
2 BM-2042 Universal Block (-105, -120)
BM-2043 (-150, -120)
BM-2044 (-200, -235)
BM-2045 (-245, -295)
3 01-3668 Smokehood, 6"
01-3545 Smokehood, 7"
4 59-1041 Smokehood Gasket
5 01-3664 Burner Mounting Plate
6A 01-3383 Observation Cover Plate
6B 01-3665 Cleanout Door
6C 59-1044 Cleanout Door Gasket
6D 10-5032 Cleanout Door Insulation
7 10-5031 Insulation Block
8 10-5024 Wicking 1/4" (4 ft. req'd)
9 10-5025 Floor Insulation Blanket (-105, -120)
10-5026 (-150, -180)
10-5027 (-200, -235)
10-5028 (-245, -295)
10 45-1254 Target Wall
11 01-3667 Heater Cover Plate (Water)
01-3579 Heater Cover Plate (Steam)
12 05-1578 Tankless Heater (Water 3.5 GPM) (-105 thru -180)
05-1579 Tankless Heater (Water 5.0 GPM) (-200 thru -295)
13 05-1580 Tankless Heater (Steam 3.5 GPM) (All)
PAGE 2
FIG. NO. 1 (BOILER ASSEMBLY)
1. GENERAL
The PB Series boiler-burner unit is a wet-base, vertical flue, low
pressure, sectional, cast iron steam or hot water heating boiler.
It is rated for natural draft firing with 0.02 ins. water column over-
fire draft. Boilers are available as factory assembled blocks with
burner and controls supplied for field assembly or as a completely
packaged boiler.
The ports between sections are provided with a special hydronic
seal which is resistant to petroleum products. The flue gas seal
between sections is accomplished by the use of fiberglass rope
rated at 1000°F.
Both packaged units and assembled blocks of sections are
hydrostatically tested for the maximum working pressures.
The assembled blocks also include the special hydronic seals,
the glass fiber rope joint seal, a precast fiber target wall, the
insulated burner mounting plate and cleanout covers.
An insulated metal jacket is furnished to both enhance the
units looks and to minimize any heat loss. A full access
cleanout cover for cleaning vertical flue passages is on the
left hand side of the boiler and is accessible by removing the
left hand cleanout access jacket panel.
PARTS LIST
6
5
1
9
16
17
20
18
251
31
5A
15
3
422 27
26
28
2
9
10
A
6B
6D
2
23
8
7
29
11
24
21
12
14B
14A
14C
6C
14A 59-1038 Port Seal 6"
14B 59-1045 Heater Plate Gasket (Front)
14C 59-1039 Port Seal 2-3/4"
15 03-8462 Heater Plate (Steam Back)
15A 59-1040 Heater Plate Gasket (Steam Back)
16 03-8438 Cleanout Cover Plate
03-8439
17 10-5029 Cleanout Cover Plate Insulation
10-5030
18 57-2905 Cleanout Bolt (5/16)
19 57-5419 Cleanout Nut (5/16)
20 57-4609 Cleanout Washers (5/16)
Water Controls & Trim
21 02-2414 Aquastat L8148A (less tankless)
02-2511 Aquastat L8124A (w/ tankless)
22 22-1203 Relief Valve 30# (water)
23 20-1019 Temp & Pressure Gauge
Steam Controls & Trim
24 02-4800 Steam Pressuretrol PA404A
25 02-3923 Tankless Ctrl. L4007A (steam)
26 21-2060 67 L.W.C.O (steam)
27 22-1204 Relief Valve 15# (steam)
22-1205 Relief Valve 15# (steam)
28 20-2010 Gauge Glass Set
29 20-2011 Steam Gauge
Ref Part
No. No. Description

PAGE 3
FIG. NO. 2 (JACKET ASSEMBLY)
FRONT
PANEL
LEFT SIDE
RIGHT SIDE PANEL
TOP
PANEL
COVER PANEL




6. PACKAGED BOILERS
Packaged boilers are shipped on a wood skid with tie down
bands and a wooden crate enclosing the boiler and burner.
Remove the protective crate and skid. Set the boiler in its
final location and shim under the feet to make it level and
secure. Adjust the jacket for proper alignment and support.
Refer to Carlin or Beckett Installation Manual for appropriate
wiring diagrams.
7. PACKAGED BOILERS AND BLOCKS OF SECTIONS
Careful inspection should be made of all assemblies to detect
possible damage during shipment. Factory assembled blocks
of sections and package boilers are hydrostatically tested at
the factory to insure pressure tightness. Before piping
connections are made to the boiler, hydrostatically retest
boiler sections to detect leaks that may have developed from
rough handling during shipment.
IMPORTANT - Do not exceed 1 1/2 times boiler
working pressure during hydrostatic testing.
8. BURNER INSTALLATION
Instructions regarding both assembly and operation of the
burner is covered in a separate catalog.
CAUTION - Do not start the burner unless all cleanout
covers are secure in place.
9. CLEANOUT COVER PLATES
It is important to maintain the integrity of the gas seal by
careful installation of the cleanout cover plate. Be sure there
is no opening to allow gases to escape.
10. JACKET ASSEMBLY
Remove all knockouts that are going to interfere with your
specific installation arrangement. Install the front panel over
the two upper burning mounting plate studs prior to the
installation of the burner mounting plate. Fold the right side
panel at both the front and rear perforated seams 90°back
against the insulation. Slide the front fold under the front
panel and secure with philip head screw. Lift side panel up
slightly to align the slots in jacket with the bracket holes.
Secure with the screws supplied.
Repeat same procedure for the left side panel.
Screw the two folds together at the back of the boiler.
Attach the top panel over the edges of all panels and secure.
The cleanout cover door attaches to the left side panel by
sliding the lower left corner into the slot provided and up over
the fold at the top of the opening in the side panel. Slide the
cover back toward the rear of the boiler until it makes contact
with the back of the slot.
IMPORTANT - Sufficient clearance must be given to
insure access to cleanout covers for cleaning pur-
poses.
2. CODES, RULES AND REGULATIONS
The installation of the boiler, the burner, wiring, controls and
fuel piping must be done in accordance with the requirements
of the local authorities having jurisdiction. In the absence of
local requirements, the following codes apply:
ANSI/NFPA31 - “INSTALLATION OF OIL BURNING
EQUIPMENT”
ANSI/NFPA70 - “NATIONAL ELECTRICAL CODE”
In Canada the following codes apply:
CSA STD. B139 - Latest Edition. “Installation Code For Oil
Burning Equipment.”
CSA STD. C22.2 No. 0 - Latest Edition. “General
Requirements - Canadian Electrical Code Part II.”
All Completed boilers shall satisfactorily pass the hydrostatic
tests as prescribed by A.S.M.E., Code Section IV.
1. Steam Boilers: The assembled boilers shall be subjected
to a hydrostatic test of not less than 45 psi.
2. Water Boilers: The assembled boiler shall be subjected to
a hydrostatic test pressure not less than 1-1/2 times the
maximum allowable working pressure.
3. The required test shall not exceed the test pressure by
more than 10 psi.
3. BOILER LOCATION
Boiler should be located on a smooth level concrete floor or
pad close to the chimney to minimize breeching length. Allow
access for boiler cleaning and burner maintenance.
CAUTION - Boiler shall be installed on non-com-
bustible floor only.
4. CHIMNEY AND BREECHING
The boiler must be vented to the outdoors by means of a tile
lined masonry chimney of the size listed on the front page or
by another approved method.
The flue pipe should be run to the chimney by the most
direct route, with the minimum number of elbows and with a
slight upward pitch. The pipe should terminate flush with the
inside face of the chimney and should be sealed in place
with insulating cement.
For energy conservation, the boiler should be vented directly
to the chimney without using a barometric draft control. The
burner operation does not require draft control for stability
with varying draft values.
5. COMBUSTION AND VENTILATION
Normal residential construction usually allows sufficient air
infiltration for combustion. If construction is tight,
consideration should be given for air louvers to the outside.
Local codes or NFPA 31, “INSTALLATION OF OIL BURNING
EQUIPMENT”, should be referred to for proper sizing and
design and air supply. In Canada refer to CSA STD. B139 -
latest edition.
CAUTION - An oil-fired unit shall be connected to
a flue having sufficient draft at all times to assure
safe and proper operation of the unit.

“A”
“C”
“D”
“E”
DRAIN VALVE
PRESS. RELIEF VALVE
“G”
OIL BURNER
CIRCULATOR
SAFETY VALVE
OIL BURNER
“E”
WATER GAUGE
AND LOW WATER
CUTOFF
WATER BOILER STEAM BOILER
“G”
“A”
“B”
“F”
“C”
“D”
“H”
“A”
“B”
“C"
“D”
“E”
“F”
“G”
“H”
PAGE 4
11. BOILER TRIM
STEAM
The steam trim furnished with the boiler consists of a 2 1/2"
round steam pressure gauge, McDonnell Miller #67 Quick
Hook-Up Low Water Cutoff, water gauge glass set with
gauge cocks, side outlet steam safety valve, and high pres-
sure limit control with siphon. Refer to FIG. NO. 3 for correct
control and trim locations. Pipe fittings required to install trim
and controls as shown are furnished.
WATER
The water trim furnished with the boiler consists of a 2 1/2"
round temperature altitude gauge and a 30 psi pressure relief
valve. A circulator relay is furnished for installation in the
upper port cover plate or the tankless heater cover plate as
indicated in FIG. No. 3. The installer must furnish and install
air removal devices, expansion tank, automatic air vents,
make-up water pressure reducing valve, isolating valves and
other pipe fittings and equipment necessary for proper oper-
ating system.
CAUTION - Direct discharge away from all personnel
to avoid accidental burning. If necessary, pipe
discharge toward floor using pipe the same diam-
eter as valve discharge. See FIG. No. 9.
12. SAFETY VALVE INSTALLATION
Install safety or relief valve in top 3/4" tapping of back section.
FIG. NO. 3 (BOILER TRIM)
LOCATION SIZE WATER STEAM
Supply
High Pressure Limit
..........
Press. Gauge
Plugged
..........
Return (Back) With Drain
Tankless Heater (Locate temp. control in domestic coil mtg. plate.)
Flue Vent Conn. (Back)
Indirect Water Heater
2"
1/4"
3/4"
1/4"
1"
1 1/4"
1 1/2"
Flange
7"
1"
Supply
..........
Hydronic Relay
..........
Theraltimeter
Return (Front) With Drain
..........
..........
Flue Vent Conn. (Back)
..........
13. OPERATING AND LIMIT CONTROLS
Many jurisdictions require dual limit controls. The boiler
installer must arrange to comply with local requirements by
furnishing and installing any extra controls. The suggested
locations for such controls are indicated on FIG. NO. 3.
The water boiler without tankless water heater is furnished
with a Honeywell L8148A hydronic relay, which, provides
high limit and circulator switching upon signal from a 24 volt
operating control. The water boiler with tankless is furnished
with a Honeywell L8124A hydronic relay, which provides high
limit, low limit and reverse action circulator control under
signal from a 24 volt operating control.
The steam boiler is furnished with a high limit pressure control
and low water cutoff. If tankless hot water is furnished, a low
limit temperature control (L4007A) will be shipped loosely in
the crate for field installation. Recommended wiring diagrams
for these boilers are illustrated in the separate burner
instruction catalog.
14. SMOKEHOOD INSTALLATION
The smokehood is sized for a 7 inch diameter flue pipe placed
over the cast iron collar and secured to the collar with a sheet
metal screw. Secure the smokehood and gasket in place with
the 4 brass round head screws.
15. PIPING CONNECTIONS
The recommended boiler piping connections are shown in
FIG. No. 4. Where special conditions exist, other arrange-
ments may be employed.

PAGE 5
NOTE: The Taco 0010 circulator is rated for 125 psi
maximum operating pressure.
17. DOMESTIC HOT WATER HEATERS
Tankless domestic hot water heaters are available for either
water boiler or steam boiler application. Refer to Page 2 for
correct installation of tankless heaters. TABLE 1 and 2 list
water capacities for both styles of heaters. See FIG. NO. 8 for
suggested tankless water heater piping arrangement.
FIG. NO. 5 (ZONE CIRCULATORS)
ZONE 2
CIRC.
ZONE 1
CIRC.
1 1/4"
3/4" DRAIN
BUSHING
1 1/4"
1 1/4"
ZONE 3
CIRC.
FIG. NO. 4 (PIPING CONNECTIONS)




EXPANSION TANK
AIR VENT
PRESSURE RELIEF VALVE
FLOW
CONTROL
VALVE
GATE VALVE
CIRCULATOR
DRAIN VALVE
PRESSURE REDUCING
VALVE
C. W. MAKEUP
THERALTIMETER
CIRCULATOR
RELAY
RETURN
SUPPLY
1 1/4"RETURN CONN.
LEAVE SPACE FOR
CLEANING FLUES
WATER
STEAM
(6 SECTION)
25 5/8"
NORMALWATER LINE
WATER GAUGEGLASS
& LOW WATER CUTOFF
PRESSURE GAUGE
1 1/2" RETURN
CONNECTION LEAVE SPACE FOR
CLEANING FLUES
PRESSURE CONTROL
GATE VALVE
SUPPLY
1 1/2" DRIP
GATE VALVE
RETURN
CLOSE NIPPLE
2" BELOW
WATER LINE
DRAIN VALVE
2" HEADER
PRESSURE
RELIEF VALVE
6" NIPPLE
2" x 20" RISER
C. W.
MAKEUP
GATE VALVE
DRAIN
VALVE
STEAM
25 5/8"
NORMAL WATER LINE
WATER GAUGEGLASS
& LOW WATER CUTOFF
PRESSURE GAUGE
1 1/2" RETURN
CONNECTION LEAVE SPACE FOR
CLEANING FLUES
PRESSURE CONTROL
GATE VALVE
SUPPLY
1 1/2" DRIP
GATE VALVE
RETURN
CLOSE NIPPLE
2" BELOW
WATER LINE
DRAIN VALVE
2" HEADER
PRESSURE
RELIEF VALVE
6" NIPPLES
2" x 20" RISERS
C. W.
MAKEUP
GATE VALVE
DRAIN
VALVE
IMPORTANT - Steam piping should be pitched to
insure both steam and condensate flow back toward
drip leg.
16. CIRCULATORS
The Taco 007 and 0010 circulators are suitable for use on a
closed heating system with 30 psi maximum operating pres-
sure. If the circulator furnished with the boiler does not have
the required capacity to serve the connected load, provide an
extra zone circulator (FIG. NO. 5) or change the circulator to
the proper size. Capacity curves for the circulators are
provided in these instructions to permit the sizes to be
checked with the system requirements. See FIG. NO. 6 & 7.

SUPPORT DISCHARGE
PIPING SO AS TO AVOID
STRAIN ON VALVE BODY
FOR DISCHARGE
PIPING THROUGH
ROOF CONSULT
THE SMITH CO.
DISCHARGE SO
AS TO AVOID
EXPOSURE OF
PERSONS TO HOT
LIQUID OR VAPOR.
LEAVE OPEN END
VISIBLE FOR PERIODIC
INSPECTION FOR SLOW
LEAKAGE OR DRIPS.
RELIEF OR SAFETY VALVE.
DO NOT REMOVE RATING
OR WARNING TAGS
DISCHARGE PIPE SIZE
EQUAL TO VALVE OUTLET.
DO NOT RESTRICT FLOW.
PB-105 ST
PB-120 ST
PB-150 ST
PB-180 ST
PB-200 ST
PB-235 ST
PB-245 ST
PB-295 ST
PB-105 WT
PB-120 WT
PB-150 WT
PB-180 WT
PB-200 WT
PB-235 WT
PB-245 WT
PB-295 WT



H
C
COLD WATER SUPPLY
CHECK VALVE
TEMPERED HOT
WATER SUPPLY
TEMPERING VALVE
OPERATING CONTROL
PAGE 6
FIG. NO. 6 (HEAD-FEET OF WATER) FIG. NO. 7 (HEAD-FEET OF WATER)
FIG. NO. 8 (TANKLESS HEATER) FIG. NO. 9 (SAFETY/RELIEF VALVE INSTALLATION)
TABLE 1 TABLE 2
40°to 140°temp. rise at 180°F. boiler water.
DOMESTIC HOT WATER SUPPLY
WATER BOILER
DOMESTIC HOT WATER SUPPLY
STEAM BOILER
Boiler
Model
Firing
Rate
Intermittent
Draw (GPM)
Continuous
Draw (GPM)
Boiler
Model
Firing
Rate
Intermittent
Draw (GPM)
Continuous
Draw (GPM)
Low
High
Low
High
Low
High
Low
High
2.50
2.50
3.30
3.30
3.80
4.50
4.60
5.00
1.75
2.00
2.50
2.90
3.30
3.90
4.00
4.90
Low
High
Low
High
Low
High
Low
High
2.50
2.50
3.30
3.50
3.50
3.50
3.50
3.50
1.75
2.00
2.50
2.90
3.30
3.50
3.50
3.50
10
8
6
4
2
00 5 10 15 20 25
FLOW - GPM
TACO 007 CIRCULATOR PERFORMANCE CURVE
15
10
5
00 1020304050
FLOW - GPM
TACO 0010 CIRCULATOR PERFORMANCE CURVE
HYDROTHERM

PAGE 7
6. Clean Heating Surfaces: Each side cleanout cover must
be removed for access to flue during cleaning. The burner
mounting plate allows full access to the combustion chamber
when removed. Cleanout covers for the individual flue
passages are located on the left hand side of the boiler and
are uncovered by removing the left hand side access jacket
panel. Use a wire brush to clean the surfaces and vacuum
the soot and scale out of the base of the boiler.
NOTE: The best cleaning method is brushing, starting at
the top and working down. Be sure to treat all fireside
surfaces.
WATER
1. Water Pressure: The boiler water pressure must be
sufficient to maintain a full system and to prevent boiling of
the system water. An initial fill pressure of 12 psi provides
for 18-1/2 feet of system height. Each additional 2.3 feet of
height requires an additional one pound pressure. Be sure
no air is trapped in the boiler, system piping or heating units
to impede circulation of the heated boiler water.
2. Low Water Cutoff: Check the cutoff switch to be certain
the switch opens on water level drop below cutoff point.
3. Temperature Controls: Check regularly to be sure the
controls are functioning to prevent excessive high boiler
water temperature.
4. Relief Valves: Conduct regular visual inspection of relief
valves to detect signs of corrosive deposits, rust buildup or
signs of weeping. If there are signs of deposits around the
disc and seat of the valve, replace the valve with a new valve
of proper capacity and pressure setting.
5. Clean Heating Surfaces: Each side cleanout cover must
be removed for access to flue during cleaning. The burner
mounting plate allows full access to the combustion chamber
when removed. Cleanout covers for the individual flue
passages are located on the left hand side of the boiler and
are uncovered by removing the left hand side access jacket
panel. Use a wire brush to clean the surfaces and vacuum
the soot and scale out of the base of the boiler.
NOTE: The best cleaning method is brushing starting at
the top and working down. Be sure to treat all fireside
surfaces.
CHIMNEY AND SMOKE PIPE
Be sure that the chimney and smoke pipe do not become
obstructed by birds nests, squirrels, soot, chimney liner
deterioration, or other happenings. Keep chimney cleanout
doors closed and seal tight around the frames. Be sure the
smoke pipe is inserted only at the nearest chimney liner
surface and seal around the pipe with insulating cement.
COMBUSTIBLES
Be sure that no combustible materials are stored close to the
boiler or smoke pipe. Fires can cause personal injury and
property damage.
20. STEAM BOILER CABLE INSTALLATION
Refer to Figure No. 10 when installing wiring cable on PB
Series Steam Boilers.
18. FILLING THE SYSTEM
WATER
Fill the system slowly, venting and checking for leaks. Do not
operate the circulator until the system is full.
When the relief valve is set to operate at 30 psi, the initial fill
pressure should be sufficient to fill the system to the high
point and develop a pressure at that point so as to prevent the
water in the system from boiling at the maximum operating
temperature. Under normal conditions, a static height of
18 1/2 feet will require an initial fill pressure of 12 psi.
STEAM
Stable water level is a necessity for steam boilers. It is very
important to have boiler water free from oil, grease, foaming
materials etc. Therefore, flush the boiler thoroughly through
a bottom drain by introducing clean water into the upper ports
of all sections of the boiler. After the boiler piping connections
are completed and the boiler can be fired, the boiler water
should be heated up and surface impurities flushed off
through a high connection and then drained through a bottom
opening. The burner should not be operated with low water
level in the boiler and makeup water should not be introduced
into a hot boiler.
If possible, the heating boiler should be operated for a time
with all condensate returning from the system being wasted
to a drain. This will remove impurities from the piping system
which, if not removed early, will eventually enter the boiler
and cause problems. In some instances, more than one
cleaning will be required to obtain stable water line.
19. BOILER MAINTENANCE
IMPORTANT - These suggestions cover the boiler
maintenance work which will result in the most
efficient operation, the longest useful life of the
boiler and the highest return on any investment
necessary to carry out the maintenance work.
STEAM
1. Water Level: Check regularly to be sure the boiler water
level stays at the marked water line during operation under
steam pressure. DO NOT ADD WATER TO A HOT BOILER.
If water level is not visible in the gauge glass, allow the boiler
to cool before adding makeup water. Locate the cause of low
water and correct before starting operation.
2. Low Water Cutoff: Check the burner cutoff switch to be
certain the switch opens on water level drop below cutoff
level.
3. Pressure Controls: Check regularly to be certain the
pressure limit controls are functioning.
4. Safety Valves: Conduct regular visual inspection of
safety valve to detect signs of corrosive deposits, rust build-
up or signs of weeping. If there are signs of deposits around
the disc and the seat of the valve, replace the valve with a
new valve of proper capacity and pressure setting.
5. Gauge Glass: When rust, suspended solids, etc. appear
in the gauge glass, blowdown may be necessary. Blowdown
should be limited only as necessary to remove sediment
from the boiler waterways. Foaming, fluctuating water line,
steam hammer are signs pointing to the need for blowdown.

PAGE 8
Any appliance that burns natural gas, propane gas, fuel oil, wood or coal is capable of producing carbon monoxide (CO).
Carbon Monoxide (CO) is a gas which is odorless, colorless and tasteless but is very toxic.
If your Hydrotherm boiler is not working properly, or is not vented properly, dangerous levels of CO may accumulate. CO is lighter than air
and thus may travel throughout the building. BRIEF EXPOSURE TO HIGH CONCENTRATIONS OF CO, OR PROLONGED EXPOSURE TO
LESSER AMOUNTS OF CO MAY RESULT IN CARBON MONOXIDE POISONING.
EXPOSURE CAN BE FATAL AND EXPOSURE TO HIGH CONCENTRATIONS MAY RESULT IN THE SUDDEN ONSET OF SYMPTOMS
INCLUDING UNCONSCIOUSNESS.
Symptoms of CO poisoning include the following:
The symptoms of CO poisoning are often confused with those of influenza, and the highest incidence of poisoning occurs at the onset of cold
weather or during flu season. A victim may not experience any symptoms, only one symptom, or a few symptoms. Suspect the presence of
carbon monoxide if symptoms tend to disappear when you leave your home.
The following signs may indicate the presence of carbon monoxide:
• Hot gases from appliance, venting system, pipes or chimney, escaping into the living space.
• Flames coming out around the appliance.
• Yellow colored flames in the appliance.
• Stale or smelly air.
• The presence of soot or carbon in or around the appliance.
• Very high unexplained humidity inside the building.
If any of the symptoms of CO poisoning occur, or if any of the signs of carbon monoxide are present, VACATE THE PREMISES
IMMEDIATELY AND CONTACT A QUALIFIED HEATING SERVICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT.
To reduce the risk of CO poisoning, have your heating system “tuned up” by a licensed heating contractor or the gas company -- preferably
before each heating season. Also have the service company check your chimney or vent pipes for blockage.
Your home should also be adequately ventilated, particularly if you have insulated your home.
ONLY QUALIFIED, LICENSED SERVICE CONTRACTORS SHOULD PERFORM WORK ON YOUR HYDROTHERM BOILER.
WARNING
Install, operate and maintain unit in accordance with manufacturer's instructions to avoid exposure to fuel substances or substances from
incomplete combustion which can cause death or serious illness. The State of California has determined that these substances may cause
cancer, birth defects, or other reproductive harm. Also, install and service this product to avoid exposure to airborne particles of glasswool
fibers and/or ceramic fibers known to the State of California to cause cancer through inhalation.
dizziness
headaches
nausea
vision problems
loss of muscle control
weakness
shortness of breath
unclear thinking
unconsciousness
FIG. NO. 10 (STEAM WIRING CABLES)



HGHG
THIS CABLE NOT
FURNISHED BY THE
MANUFACTURER.
67 L.W.C.O
67 L.W.C.O
BURNER
JUNCTION
BOX
PA404A HI LIMIT
PA404A
HI LIMIT
WHITE
BLACK
WHITE
BLACK
12
34
1 PH. 60 CY. 115V 1 PH. 60 CY. 115V
*
*
CONNECTOR MUST BE
DISCONNECTED PRIOR
TO MOUNTING TO THE
L.W.C.O.
WHITE
BLACK
WARNING