Page 1
SC/SCT
Gas/Oil Boilers
Series
Oil, Gas &
Installation,
Operation &
Maintenance
Manual
Page 2
INSTALLATION INSTRUCTIONS – SERIES SC AND SCT
1— Read carefully, study these instructions before beginning work.
2— This boiler must be installed by a qualified contractor.
3— The boiler warranty can be voided if the boiler is not installed, maintained and serviced correctly.
4— The equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made.
These shall be carefully followed in all cases. Authorities having jurisdiction shall be consulted before installations are made.
A – ACCESSIBILITY CLEARANCES
1— To provide for reasonable conditions of accessibility for servicing, the following minimum clearances are recommended between the boiler and
adjacent walls or other appliances—24" on the right side, 36" on the left side, and 30" in the front and rear of the boiler.
B – AIR FOR COMBUSTION AND VENTILATION
1— Be certain adequate facilities are available to provide air for satisfactory combustion and ventilation.
2— Appliances Located in Unconfined Spaces.
a. Installations in unconfined spaces with conventional construction and large areas such as basements, the supply of air for combustion and
ventilation can usually be considered adequate.
3— Appliance Located in Confined Spaces
a. If all air for combustion and ventilation is to come from within the building, two openings, one near the ceiling and one near the floor of the boiler
room shall be provided with the minimum free area of each opening equal to 140 sq. in. per gallon of oil burned.
b. If all air for combustion and ventilation is to come from outside the building, two openings, one near the ceiling and one near the floor of the
boiler room shall be provided with the minimum free area of each opening equal to 35 sq. in. per gallon of oil burned.
If ducts are used to convey the air, areas of 35 sq. in. per gallon of oil burned for vertical ducts or 70 sq. in. per gallon of oil burned for horizontal
ducts are to be provided. Ducts shall have the same area as the free area of the openings to which they are connected.
C – SETTING UP BOILER
1— Models SC/SCT-05 and SC/SCT-06 are shipped in a single block. The boiler sections on models SC/SCT-07 thru SC/SCT-10 are shipped in two
parts.
2— Provide a good level foundation, located as close as possible to the center of the heating system and to the chimney or vent system. The heating
surface of the SC/SCT Series Boilers is designed to be cleaned from either the top or left of the unit. Allow adequate clearance on the left of unit if
servicing is to be done from the side.
CAUTION: THIS BOILER IS NOT APPROVED FOR USE ON COMBUSTIBLE FLOORING.
3— Place each block of sections on the foundation with nipple ports facing each other. Refer to Figure 1.
4— Clean nipple ports with an acceptable cleaning solvent to remove protective coating. Make certain there are no burrs around the outside edge of the
ports.
5— Spread a thin coat of TFE-TITE in the nipple ports. Never on nipples.
6— Insert the push nipples. Make certain they are clean and free from burrs.
7— Apply a thin coat of TFE-TITE to the rope groove. Press the Hi Temp Rope into rope groove.
8— Arrange both blocks so that protruding nipples enter the open ports. Care must be taken to keep nipples straight and blocks aligned.
9— Insert draw rods through the nipple ports. Make certain that the 3/4" draw rod is used on the large nipple. Pay particular attention to the placement
of the draw washers. See Figure 1.
10— Before starting draw, oil the threads and between the nuts and washers.
11— Tighten the hex nuts and draw boiler evenly until the small pads on each section just touch.
12— After boiler is drawn, remove draw rods and cut 5" from 6-1/4" threaded end. Insert rod thru the lugs on each end section and tighten the hex nuts
hand tight.
13— Make up water connection to boiler and fill. Check to make certain there is no leakage at the nipple port connection.
14— Remove flue collector and Hi Temp Rope (Items 8 and 9, Figure 4) from carton. Lay rope (Item 8) on top of boiler against bead provided. Place flue
collector on top of rope and attach to boiler with 1/4"-20 x 1-3/4" studs and nuts. Draw down snugly. On Models 05 and 06, remove combustion
chamber cover plate (Item 3) and attach flame observation assembly (Item 4) to Combustion Chamber Cover Plate (Item 3). Remove and discard
round cast iron cover door X-1031 located on the inside of the cover plate.
15— Remove clean-out cover plates and insulation (7). Each clean-out cover plate is attached to the boiler by using two carriage bolts, nuts and
washers (6). Install the carriage bolts into the notch at the top and bottom of each clean-out opening, then secure them with a flat washer and steel
nut as shown in Figure 2 locking them into place. Press the clean-out plate with insulation over the protruding carriage bolts until the bolts punch
through the insulation so a flat washer and brass nut can be installed. Tighten down nuts snugly compressing the insulation to form a good seal
around the clean-out opening.
1
Page 3
2
FIGURE 1
FIGURE 2
Page 4
D - JACKET ASSEMBLY
1— Refer to Page 4 for exploded view. Attach the back jacket panel (19) to bosses on middle of back section with two 1/4" x 3/8" truss
head machine screws (20) provided. The back panel has two 5/16" dia. holes close to the center of the panel.
2— Locate ceramic blanket liner and install in combustion chamber floor, placing back edge of blanket against bottom edge of target wall.
3— Place the front jacket panel (23) on the block and attach the combustion chamber cover plate assembly (3).
4— Attach the right side jacket panel (22) to the front and back panels with sheet metal screws.
NOTE: ON SERIES SCT BOILERS, THE OPTIONAL WATER HEATER (17) MUST BE INSTALLED BEFORE THE LEFT SIDE
JACKET PANEL IS ATTACHED.
5— If water heater is used, remove knock out piece in left side jacket panel (21) before installing. Attach left side jacket panel in the
same manner as the right side panel.
6— Attach the top panel. The top is made in two pieces (24 & 25). Join the two pieces together with sheet metal screws. Secure top
panel to front, back and sides with sheet metal screws.
7— Water Heater
a. Series SC Water Boilers - See chart below for ratings and usage.
Install Water Heater (13) when required, in large opening in front of boiler. See Figure 3 for suggested piping.
b. Series SCT Steam Boilers - See chart below for ratings.
Install Water Heater (17) when required in large opening in back section. See Figure 3A for suggested piping.
Tankless Water Heater Ratings
BOILER
MODEL
NUMBER
HEATER NO.*
X-1020 – G.P.M.
HEATER NO.*
X-1021 – G.P.M.
HEATER NO.*
X-1022 – G.P.M.
HEATER NO.
X-1082 – (Steam)
SC/SCT-05 4.75 — — 4.75
SC/SCT-06 5.0 6.0 — 5.00
SC/SCT-07 5.25 6.5 — 5.25
SC/SCT-08 5.5 7.0 10.0 5.50
SC/SCT-09 5.75 7.5 11.0 5.75
SC/SCT-10 6.0 8.0 12.0 6.00
Water heater ratings are based on intermittent demand—40°F to 140°F with 200°F boiler water
temperature. *Used on water boilers only.
3
DANGER: Install mixing valve in hot water supply piping. Water temperature over 125°F can cause severe burn instantly or death from scalds.
FIGURE 3 FIGURE 3A
When water heater is not employed, cover the heater opening with cover plate (12) or (16).
BE SURE RUBBER GASKET IS IN PLACE BETWEEN COVER PLATE OR WATER HEATER PLATE AND BOILER SECTION.
Page 5
4
FIGURE 4
Page 6
SERIES SC/SCT
5
Model No.
Item No. Description Part No. SC/SCT-05 SC/SCT-06 SC/SCT-07 SC/SCT-08 SC/SCT-09 SC/SCT-10
1
Block Assembly – SC-05 Model Only X-1096 X
Block Assembly – SC-06 Model Only X-1096-1 X
Block Assembly – SCT-05 Model Only X-1097 X
Block Assembly – SCT-06 Model Only X-1097-1 X
Front Split Block Assembly SC-1018 X X X
Front Split Block Assembly SC-1018-1 X
Back Split Block Assembly SC-1019 X
Back Split Block Assembly SC-1019-1 X
Back Split Block Assembly SC-1019-2 X X
Back Split Block Assembly (SCT Model) SC-1020 X
Back Split Block Assembly (SCT Model) SC-1021-1 X
Back Split Block Assembly (SCT Model) SC-1021-2 X X
2 Target Wall X-3019 X X X X X X
3 Combustion Chamber Cover Plate X-1060-1 X X X X X X
4 Flame Observation Assembly SC-1012 X X X X X X
5 5/16"-18 x 2-1/4" Studs w/Nuts – 5 Req'd X-1061 X X X X X X
6 5/16"-18 x 1-3/4" Carriage Bolt w/Nut X X X X X X
7 Side Clean-Out Cover Plate X-1085 X X X X X X
8
High Temp. Rope 1/2" Dia. 64" Long X
High Temp. Rope 1/2" Dia. 72" Long X
High Temp. Rope 1/2" Dia. 80" Long X
High Temp. Rope 1/2" Dia. 88" Long X
High Temp. Rope 1/2" Dia. 96" Long X
High Temp. Rope 1/2" Dia. 104" Long X
9
Flue Collector and Damper Assembly SC-5005-5 X
Flue Collector and Damper Assembly SC-5005 X
Flue Collector and Damper Assembly SC-5005-1 X
Flue Collector and Damper Assembly SC-5005-2 X
Flue Collector and Damper Assembly SC-5005-3 X
Flue Collector and Damper Assembly SC-5005-4 X
10 1/4"-20 x 1-3/4" Studs w/Nuts – 2 Req'd X-5000 X X X X X X
11 Rubber Gasket X-1023 X X X X X X
12 Cover Plate X-1059 X X X X X X
13
Tankless Coil (Optional Water Only) X-1020 X X X X X X
Tankless Coil (Optional Water Only) X-1021 X X X X X
Tankless Coil (Optional Water Only) X-1022 X X X
14 3/8"-16 x 3/4" Hex Hd. Cap Screws - 6 Req'd X X X X X X
15 Rubber Gasket (SCT Models) X-1083 X X X X X X
16 Cover Plate (SCT Models) X-1084 X X X X X X
17 Tankless Heater (Optional SCT Models) X-1082 X X X X X X
18
3/8"-16 x 3/4" Hex Hd. Cap Screws
(SCT Models) – 8 Req'd
X X X X X X
19 Back Jacket Panel SC-6003 X X X X X X
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SERIES SC/SCT
6
Model No.
Item No. Description Part No. SC/SCT-05 SC/SCT-06 SC/SCT-07 SC/SCT-08 SC/SCT-09 SC/SCT-10
20
1/4"-20 x 3/8" Truss Hd. Mach. Screws –
Cad. Plate – 2 Req’d
X X X X X X
21
Left Side Jacket Panel SC-6001-5 X
Left Side Jacket Panel SC-6001 X
Left Side Jacket Panel SC-6001-1 X
Left Side Jacket Panel SC-6001-2 X
Left Side Jacket Panel SC-6001-3 X
Left Side Jacket Panel SC-6001-4 X
22
Right Side Jacket Panel SC-6002-5 X
Right Side Jacket Panel SC-6002 X
Right Side Jacket Panel SC-6002-1 X
Right Side Jacket Panel SC-6002-2 X
Right Side Jacket Panel SC-6002-3 X
Right Side Jacket Panel SC-6002-4 X
23 Front Jacket Panel SC-6000 X X X X X X
24
Right Top Jacket Panel SC-6005-5 X
Right Top Jacket Panel SC-6005 X
Right Top Jacket Panel SC-6005-1 X
Right Top Jacket Panel SC-6005-2 X
Right Top Jacket Panel SC-6005-3 X
Right Top Jacket Panel SC-6005-4 X
25
Left Top Jacket Panel SC-6004-5 X
Left Top Jacket Panel SC-6004 X
Left Top Jacket Panel SC-6004-1 X
Left Top Jacket Panel SC-6004-2 X
Left Top Jacket Panel SC-6004-3 X
Left Top Jacket Panel SC-6004-4 X
26 Ceramic Blanket Liner – 50846
14"x14¹/₂"*14"x18³/₄"
Ceramic Blanket Liner – 51038
Sizes must be cut to fit.
14"x23"
14"x27¹/₄" 14"x31¹/₂" 14"x35³/₄"
*Size must be cut to fit
Page 8
E – PIPING
DO NOT PIPE BOILER UNTIL AFTER JACKET IS INSTALLED.
1— See Figures 5 and 6 for suggested piping to the boiler.
2— Make up cold water supply connection to the boiler.
3— Install pressure gauge or theraltimeter in tapping provided. See Figure 7.
4— Plug all open tappings in the boiler and fill with water. Pressurize boiler to 45 PSIG for 30 PSIG sections and 75 PSIG for 50 PSIG
sections. Check to make certain that all joints and fittings are water tight.
5— After all joints and connections have been proven water tight, remove cold water supply and plugs from all tappings that are to be
used. See Figure 7 for tapping locations.
NOTE: IF THIS BOILER AND DISTRIBUTING SYSTEM IS USED IN CONJUNCTION WITH A REFRIGERATION SYSTEM, THE
CHILLED MEDIUM SHALL BE PIPED IN PARALLEL WITH THE BOILER AND THE PROPER VALVES APPLIED TO
PREVENT THE CHILLED MEDIUM FROM ENTERING THE BOILER. WHEN THE BOILER IS CONNECTED TO HEATING
COILS LOCATED IN AIR HANDLING UNITS WHERE THEY MAY BE EXPOSED TO REFRIGERATED AIR CIRCULATION,
THE BOILER PIPING SYSTEM MUST BE EQUIPPED WITH FLOW CONTROL VALVES OR OTHER AUTOMATIC MEANS
TO PREVENT GRAVITY CIRCULATION OF THE BOILER WATER DURING THE COOLING CYCLE.
7
FIGURE 5
FIGURE 6
Pipe the supply and return in one of two ways:
1. Pipe the supply from the top of the rear section and return to the
bottom of the front section. Use the ³/4" tapping in the top of the
back section for air elimination.
2. As an acceptable alternative, pipe the supply from the top of the
front section and return to the bottom of the rear section. Provide
an air elimination means within the supply piping.
HOT WATER
Boiler
Model No.
Risers Header Equalizer
SC/SCT-05 2-2" 3"
1
¹⁄₂
"
SC/SCT-06 2-2" 4"
1
¹⁄₂
"
SC/SCT-07
2-2
¹⁄₂
"
4"
1
¹⁄₂
"
SC/SCT-08
2-2
¹⁄₂
"
4"
1
¹⁄₂
"
SC/SCT-09
2-2
¹⁄₂
"
4" 2"
SC/SCT-10
2-2
¹⁄₂
" and 1-2"
4" 2"
The return from system should always enter equalizer through
Hartford Loop, 2" to 4" below normal water line.
STEAM
Page 9
F - BURNER INSTALLATION
1— The burner is supplied with a mounting flange fixed in position.
2— Mount the burner to the combustion chamber cover plate (3) with four 5/16"-18 x 1" studs and nuts provided. BE SURE HI TEMP
GASKET IS BETWEEN THE BURNER MOUNTING FLANGE AND THE COMBUSTION CHAMBER COVER PLATE.
3— Burner Specifications.
8
BECKETT BURNER
Boiler
Model No.
Burner
Model No.
*Nozzle
Size
Pressure
psig
SC/SCT-05 CF-500 2.50 60° B 140
SC/SCT-06 CF-500 3.00 60° B 140
SC/SCT-07 CF-800 3.25 45° P 150
SC/SCT-08 CF-800 3.75 45° P 140
SC/SCT-09 CF-800 4.00 30° P 150
SC/SCT-10 CF-800 4.50 30° P 150
CARLIN BURNER
Boiler
Model No.
Burner
Model No.
*Nozzle
Size
Pressure
psig
SC/SCT-05 201 CRD 2.50 60° B 140
SC/SCT-06 201 CRD 3.00 60° B 140
SC/SCT-07 201 CRD 3.25 45° SS 150
SC/SCT-08 201 CRD 3.75 45° SS 140
SC/SCT-09 201 CRD 4.00 30° B 150
SC/SCT-10 301 CRD 4.50 30° B 150
GORDON-PIATT GAS OR COMB. GAS-OIL BURNERS
Boiler
Model No.
Gas Burner
Model No.
Gas-Oil
Model No.
*Nozzle
Size
Pressure
psig
SC/SCT-05 S4.2-G-03 S4.2-GO-03 1.75 90° B 300
SC/SCT-06 S4.2-G-03 S4.2-GO-03 2.25 60° B 275
SC/SCT-07 S4.2-G-03 S4.2-GO-03 2.50 60° B 275
SC/SCT-08 S4.2-G-03 S4.2-GO-03 2.75 60° B 275
SC/SCT-09 S4.2-G-03 S4.2-GO-03 (2) 1.50 60° B 275
SC/SCT-10 S4.2-G-03 S4.2-GO-03 (2) 1.75 60° B 250
POWER FLAME GAS OR COMB. GAS-OIL BURNERS
Boiler
Model No.
Gas Burner
Model No.
Gas-Oil
Model No.
*Nozzle
Size
Pressure
psig
SC/SCT-05 CR1-G-10 CR1-GO-10 1.75 90° S 300
SC/SCT-06 CR1-G-10 CR1-GO-10 2.25 90° S 275
SC/SCT-07 CR1-G-10 CR1-GO-10 2.50 90° S 275
SC/SCT-08 CR1-G-10 CR1-GO-10 2.75 90° S 275
SC/SCT-09 CR1-G-10 CR1-GO-10 3.00 90° S 275
SC/SCT-10 CR1-G-10 CR1-GO-10 3.50 90° S 250
*Nozzle Size: B = Delavan P/SS = Hago S = Steinen
1. Honeywell RM7895A 120 VAC Control 2. Honeywell S8680J 24 VAC Control
4— For other information pertinent to the burner installation, see the Installation Manual accompanying the burner.
POWER FLAME GAS BURNERS
Boiler
Model No.
Burner
Model No.
Side Orifice
Drill Size
(inches)
SC/SCT-05 JR15A-10 3/8
SC/SCT-06 JR15A-10 7/16
SC/SCT-07 JR15A-10 15/32
SC/SCT-08 JR30A-10 1/2
SC/SCT-09 JR30A-10 17/32
SC/SCT-10 JR30A-10 19/32
MIDCO GAS BURNERS
Boiler
Model No.
Burner
Model No.
1
Burner
Model No.
2
Natural Gas Side
Orifice Drill Size
(inches)
LP Gas Side
Orifice Drill Size
(inches)
SC/SCT-05 RE6850 RE6850B 31/64 23/64
SC/SCT-06 RE6850 RE6850B 31/64 23/64
SC/SCT-07 RE6850 RE6850B 9/16 31/64
SC/SCT-08 RE6850 RE6850B None 9/16
SC/SCT-09 RE6850 RE6850B None 9/16
SC/SCT-10 RE6850 RE6850B None None
Page 10
G – CONTROLS
1— Apply controls as follows:
a. Water Boilers: Install the limit or operating control, temperature & pressure gauge and the pressure relief valve. See Figure 7 for
proper location.
b. Steam Boilers: Install pressure gauge, gauge glass trim and safety valve. See Figures 7 and 8. For application of low water
cut-off see Figure 11. For pump control or feeder application see Figures 9 and 10.
Caution: Pipe the discharge of the pop safety valve or relief valve to prevent injury in the event of pressure relief. Suggest discharge
to be piped to drain. Pipe full size of outlet.
H – CHIMNEY AND BREECHING
1— The Series SC/SCT boilers are designed for forced draft firing only. The boiler and flue outlet sizes produce the required pressures in
the combustion chamber when operating at boiler rating. The boiler breeching should be the full size of the flue collector outlet and
may be attached to a conventional chimney or a short vent. A 3 ft. minimum height of vent above the roof is required. DO NOT
SIDEWALL VENT BOILER.
2— When attached to a conventional chimney an excess draft may be available. If such is the case, a draft regulator should be installed
and set to provide minimum draft. The damper supplied should then be set to provide a maximum pressure of +0.1" water column or
minimum of 0" water column at the outlet of the flue collector. Lock damper in place by use of set screws.
If the boiler breeching is attached to a non-conventional chimney or short stack the breeching also will be pressurized. It should be
pointed out that unsealed conventional smoke pipe must not be used as it will leak flue gases at the seams and joints.
When constructing a sealed or welded breeching for the Series SC/SCT boilers, it is obvious a means of disconnecting (Flange) must be
provided to facilitate removal of the flue collector for vertical cleaning of the boiler and chimney.
9
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10
FIGURE 7
DIMENSIONS
Rear of **Distance **Dist. Betw.
Boiler Burner Number Jacket Jacket Top to Length Jacket to c/l Flue Between Front Tap.
Unit Number of Width Length Floor Fire Box of Flue Size Tappings & Tap. Inter.
WU or SU Sections “A” “B” “C” “D” “E” “F” “G” “G1”
SC/SCT-05 5 22-1/2" 24-1/2" 43-1/4" 18-3/8" 13-1/4" 7" 17-7/16" —
SC/SCT-06 6 22-1/2" 28-5/8" 43-1/4" 22-9/16" 15-3/8" 9" 21-5/8" —
SC/SCT-07 7 22-1/2" 32-7/8" 43-1/4" 26-3/4" 17-1/2" 9" 25-13/16" —
SC/SCT-08 8 22-1/2" 37-1/8" 43-1/4" 30-15/16" 19-5/8" 9" 30" —
SC/SCT-09 9 22-1/2" 41-3/8" 43-1/4" 35-1/8" 21-3/4" 10" 34-3/16" —
SC/SCT-10 10 22-1/2" 45-5/8" 43-1/4" 39-5/16" 23-7/8" 10" 38-3/8" 17-1/8"
*Note: Maximum burner length: Beckett = 13-1/2", Gordon Piatt S-4" = 27, Gordon Piatt R = 30", Power Flame C = 34", Power Flame J = 24", Webster JB-1 = 30".
**Dimensions are approximate.
TAPPING LOCATIONS
Size
Location N.P.T. Steam Water
H 3/4" Low Limit Control N/A
J 3/4" Press. Gauge. Oper.
Cont. & Limit Cont. Operating Control
K 3/4" N/A Limit Control
L 1/4" N/A Theraltimeter
M 1/2" Gauge Glass & N/A
Low Water Cut-off
N 2" Return Optional Return
O 3/4" Secondary Probe Secondary Probe
Low Water Cut-off Low Water Cut-off
P — Safety Valve Relief Valve
Q 1-1/4" on 05-06 Return Return
1-1/2" on 07-10
R 3/4" Drain Cock Drain Cock
S 1-1/2" Skim Tapping Optional High Limit
T 3/4" Primary Probe N/A
Low Water Cut-off
V 1" Optional Float Optional Float
Low Water Cut-off Low Water Cut-off
Page 12
11
FIGURE 8
STEAM GAUGE/PRESSURETROLS
ALTERNATE PIPING ARRANGEMENT
STEAM GAUGE/PRESSURETROLS
PIPING ARRANGEMENT
Page 13
12
FIGURE 9: McD&M 51 Low Water Cut-off and Feeder
Page 14
13
FIGURE 10: McD&M 157 Low Water Cut-off and Pump Control
FIGURE 11: McD&M #67PE-2 Low Water Cut-off
Page 15
I – ACCESSIBILITY CLEARANCES
1— All electrical wiring shall be done in accordance with the National Electrical Code and Local Requirements.
2— For recommended wiring, See Figures 12 and 13.
3— For complete information on servicing and adjustment of controls, refer to the attached control specification sheets.
NOTE: SINGLE POLE SWITCHES INCLUDING THOSE OF SAFETY CONTROLS OR PROTECTIVE DEVICES SHALL NOT BE
WIRED IN A GROUNDED LINE.
J – CLEANING HEATING SURFACES
NOTE: BOILER IS TO BE CLEANED AT LEAST ONCE A YEAR. THIS BOILER MAY BE CLEANED FROM THE LEFT SIDE OR TOP.
1— Turn off all electrical power to boiler before beginning cleaning operation.
2— If cleaning from the side, remove left jacket panel and side clean-out cover plates.
3— If cleaning from the top, remove flue pipe, left top jacket panel and flue collector.
4— Brush the flue passages with a wire brush to remove all scale or soot from these heating surfaces.
5— Remove any scale or soot from the fire box by means of vacuum cleaning or any other available means.
NOTE: THE OIL BURNER MUST BE REMOVED TO FACILITATE THIS OPERATION.
6— Install clean-out covers or flue collector, be sure the gasket or rope seal is in good condition. If not, replace.
7— Install jacket panels and flue pipe as required.
K – CLEAN THE BOILER (STEAM BOILERS ONLY)
1— Clean the boiler within one week after initial start-up. Cleaning will be more effective if boiler operates a day or two to loosen
sediment and impurities in system.
2— Boiler must be cleaned to remove any accumulation of oil, grease, sludge, etc. in the system. These substances can cause foaming
and surging of boiler water, producing an unstable water line and water carryover to system.
WARNING: CLEANING THE BOILER REQUIRES THE USE OF VERY HOT WATER AND CORROSIVE CHEMICALS. USE CARE
WHEN HANDLING TO PREVENT INJURY.
3— Connect a skim valve off the 1-1/2 NPT skim tapping on rear of boiler. See Figure 7 for skim tapping location. Run a 1-1/2 NPT drain
line off skim valve to a point of safe discharge.
4— Provide a means of supplying continuous fresh water to the boiler for the cleaning process.
5— Use common washing soda, such as Arm and Hammer Super Washing Soda. Mix 1/2 pound of soda with water in a 10 quart pail.
Mix a proportion of one (1) pound of washing soda for each 800 square feet EDR net boiler rating. Pour the mixture into the boiler
through the safety relief valve tapping.
6— Open the skim valve. Fill boiler until water begins to flow out of the valve.
CAUTION: DO NOT LEAVE BOILER UNATTENDED WHILE FIRING BURNER. OPERATING BOILER WITH WATER BELOW
MINIMUM PERMISSIBLE WATER LEVEL MAY FRACTURE SECTIONS.
7— Turn on burner. Allow boiler water to heat up to just below steaming (180 - 200°F). Do not allow boiler to steam; steaming mixes up
contaminants instead of floating them at surface.
8— Open make-up water valve to continually feed water to boiler. Adjust flow to maintain water temperature at 180 - 200°F.
CAUTION: DO NOT ALLOW MAKE-UP WATER TO FLOW TOO FAST. EXCESSIVE QUANTITIES OF COLD WATER MAY
FRACTURE SECTIONS.
9— Continue skimming boiler until water flowing from skim tapping flows clear. This will take some time, possibly several hours for a dirty
system.
10—Turn off burner, close make-up water valve.
11—Drain boiler completely. Refill and drain one or two times to wash out all washing soda.
12—Remove skim valve and piping. Pipe a nipple and cap in the skim valve.
NOTICE: IF GAUGE GLASS BECOMES DIRTY MORE CONTAMINANTS HAVE WORKED LOOSE IN SYSTEM. REPEAT
CLEANING AND SKIMMING PROCESS AS NEEDED TO CLEAN SYSTEM.
14
Page 16
15
FIGURE 12
FIGURE 13
STEAM
With or Without
Tankless Water Heater and
GRAVITY HOT WATER
FORCED HOT WATER
With or Without
Tankless Water Heater
Page 17
16
Apply Prefix “O” for Oil – “G” for Gas – “GO” for Gas-Oil Ratings based on 12
¹⁄₂
% CO2Oil
1 Burner input based on No. 2 fuel oil with a heating value of 140,000 Btu per gallon.
2 Net I=B=R water ratings based on an allowance of 1.15.
3 Net I=B=R steam ratings based on an allowance of 1.333.
4 Consult factory before selecting a boiler for installations having unusual piping and pickup requirements, such
as intermittent system operation, extensive piping systems, etc.
5 A 3 foot minimum height of vent above the roof is recommended. For any unusual venting conditions, consult
your local building code or authority.
K — SERIES SC AND SCT RATINGS
Unit Number
Boiler Burner
WU or SU
Gross
I=B=R
Output
M.B.H.
Net I-B-R Ratings I-B-R Burner Capacity
4
Boiler
HP
Vent
5
Water
2
M.B.H.
Steam
3
M.B.H.
Steam Sq.
Ft.
Oil G.P.H.
Input
1
Gas M.B.H.
Input
Size
Inches
Height Feet
(Min.)
SC/SCT-05 343 298 257 1071 3.00 433 10.2 7 3
SC/SCT-06 405 352 304 1267 3.50 505 12.1 9 3
SC/SCT-07 462 402 347 1446 4.00 577 13.8 9 3
SC/SCT-08 519 451 389 1621 4.50 649 15.5 9 3
SC/SCT-09 575 500 431 1796 5.00 722 17.2 10 3
SC/SCT-10 632 550 474 1975 5.50 794 18.9 10 3
Page 18
SC/SCT
Gas/Oil Boilers
Series
Oil, Gas &
Installation,
Operation &
Maintenance
Manual
TO THE INSTALLER:
This manual is the property of the owner and must
be affixed near the boiler for future reference.
TO THE OWNER:
This boiler should be inspected annually by a
Qualified Service Agency.
SC8000 R12 (2/06-2M)
Printed in U.S.A.
©2006
HI Division
of gama
ASME
PB HEAT, LLC
PO BOX 447 • NEW BERLINVILLE, PA 19545-0447
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