Slant/Fin Galaxy, Galaxy GXH-300H Installation And Operating Instructions Manual

GAS-FIRED CAST IRON BOILERS FOR NATURAL AND L.P. PROPANE GASES

HOT WATER—Models GG-75H through GG-399H

GALAXY

LOW PRESSURE STEAM AND HOT WATER— Models GXH-105 through GXH-300H

INSTALLATION AND OPERATING INSTRUCTIONS

CONTENTS ...........................................................................PAGE

Dimensions...................................................................................2

Installation Requirements:

Boiler Location........................................................................ 3

Boiler Foundation.................................... ............................... 3

Chimney Requirements............................. ............................. 3

Minimum Clearance................................................................. 3–4

Vent Piping.............................................................................. 4

Gas Piping............................................. ...................................... 4

Boiler Room Air Supply and Ventilation.................................. 5

Draft Hood Installation............................................................ 5

Piping at Boiler—Water Boilers................... ........................... 5

Steam Controls Assembly and Installation............................. 6

Piping a Steam Boiler ......................................................... 6, 7

Vent Damper.................................................................. 7, 8, 12

Electrical Controls and Wiring.................... ............................ 9

Pump or Valve Zoning—Water Boilers.............. .................. 10–11

Boiler Water Temperature Control .......................................12–13

Operating Instructions:

Filling and Venting Water Systems....................................... 14

Initial Start, Safety and Lighting Instructions........................ 15

Burner Adjustment, Checking Gas Input.............................. 15

Controls, Safety Check......................................................... 17

Low Water Cut-off Check-Out.................................................... 17

Pressure Control Check-Out ..................................................... 17

Blowing Off a Steam Boiler........................................................ 17

Care and Maintenance.................................. ............................ 18

Safety Check for Control System................ ......................... 18

Protection From Freezing..................................................... 18

Water Treatment.....................................................................18

Sequence of Operations............................................................ 21

Troubleshooting Guide...............................................................22

Appendix A & B.......................................................................... 23

Appendix C, D & E......................................................................24

IMPORTANT

READ ALL OF THE FOLLOWING WARNINGS AND

STATEMENTS BEFORE READING THE INSTALLATION

FOR LIQUEFIED PETROLEUM (L.P.)

PROPANE GAS-FIRED BOILERS

The installation must conform to the requirements of the
authority having jurisdiction or, in the absence of such
requirements, to the National Fuel Gas Code, ANSI Z223.1­latest edition or

and propane

additional requirements in this Slant/Fin Instruction Book.

In addition, where required by the authority having juris dic ­tion, the installation must conform to American Society of
Mechanical Engineers Safety Code for Controls and Safety
Devices for Automatically Fired Boilers, No. CSD-1 or

149.1 latest edition for natural gas and propane

any conflict in the above requirements, then the more
stringent requirement will apply.

This manual must be left with owner and should be hung on
or adjacent to the boiler for reference.

This boiler, gas piping and accessories must be installed,
connected, serviced and repaired by a trained, experienced
service technician, familiar with all precautions required for
gas-fired equipment and licensed or otherwise qualified, in
compliance with the authority having jurisdiction.

. The installation must also conform to the

INSTRUCTIONS.

WARNING

SEE "WARNING" ON PAGE 3

CSA B 149.1 latest edition for natural gas

CSA B

. If there is

WARNING

Heating Contractor

Address

Phone Number

Boiler Model Number

Boiler Serial Number

Installation Date

Printed in Canada 0713 PUBLICATION GG-41
Part No. 41-0549

Revision B

2 GALAXY

Pressure Relief

Valve

3/4"

1/2" Vent

Tapping

Alternate 1-1/2"

return (except

GG-75 thru

GG-175

FRONT VIEW

All GG and GXH

RIGHT SIDE

GG / GXH-PT

RIGHT SIDE

GXH-PZT-PPZT

RIGHT SIDE

GXH-PZ

GG SERIES HOT WATER BOILERS—DIMENSIONS IN MM FOLLOWED BY INCHES

GG-75H GG-100H GG-125H GG-150H GG-175H GG-200H GG-225H GG-250H GG-275H GG-300 GG-325 GG-350 GG-350H GG-375 GG-375H GG-399H

502

193/4

A

335

B

133/16

127

C

5

3

1178

D

46

/8

171

E

63/

4

203

F

8

235

1

1

/4

2

11/

70

23/4
91/4

G
H
J
K

502
335
152

1353

330
203

235

3

19

/4

133/16

6

1

53

/4

13

8

1

1

/4

2

11/

70

23/4
91/4

502
335
152

1353

330
203

235

3

19
133/16

6
53
13

8

1

11/

70

23/4

91/4

23

/4

584
421

16

152

1

1

6

1353

53

/4

330

13

248

9

/4

11/4

2

11/

70

23/4

235

91/4

23

584

9

/16

1

/4

3

4

/

421
152

1353

330
248

9

16

/16

6

1

53

/4

13

3

9

4

/

11/4

2

235

2

11/

70

23/4
91/4

673
506
178

1461

406
286

235

1

26

/2

1915/16

7

1

57

/2

16

1

11

4

/

11/4

2

11/

70

23/4
91/4

673
506
178

1461

406
286

235

1

26

/2

1915/16

7

1

57

/2

16

1

11

4

/

11/4

2

11/

70

23/4
91/4

756
592
203

1514

432
330

235

3

29

/4

235/16

8

5

59

/8
17
13

1

1

/4

2

11/

70

23/4
91/4

756
592
203

1514

432
330

235

3

29

/4

235/16

8

5

59

/8
17
13

1

1

/4

2

11/

70

23/4
91/4

845
662
203

1514

432
375

235

1

33

/4

261/16

8

5

59

/8

17

3

14

4

/

11/4

2

11/

70

23/4
91/4

845
662
203

1680

432
375

235

1

33

/4

261/16

8

1

66

/8

17

3

14

4

/

11/4

2

11/

70

23/4
91/4

927
764
229

1680

572
413

235

1

36

/2

301/16

9

1

66

/8

221/

2

4

161/

11/4

2

11/

70

23/4
91/4

927
764
229

1680

572
413

235

1

36

/2

301/16

9

1

66

/8

221/

2

4

161/

11/4

2

11/

70

23/4
91/4

927
764
229

1680

381
413

235

1

36

/2

301/16

9

1

66

/8

221/

2

4

161/

11/4

2

11/

70

23/4
91/4

927
764
254

1680

381
413

235

1

36

/2
301/16
10

1

66

/8
221/

2

4

161/

11/4

2

11/

70

23/4
91/4

GXH SERIES STEAM AND HOT WATER BOILERS - DIMENSIONS IN MM FOLLOWED BY INCHES

GXHA-100 GXH-105 GXH-125GXHA-120 GXH-150 GXH-170GXHA-160 GXH-190 GXH-210GXHA-200 GXH-230 GXH-250 GXH-275 GXH-300 GXH-300H

23

A

419

B

127

C
D
E

254

F
G
H
J
K
L

M

727

584

1

16

/

5

10

9

421

2

127

1178

171
248

419

16

46

16

16

/

127

5

3

/8

63/4

254

93/4
11/4

2

21/

89

2

31/

248

93/4

1

2

5

28

/8

/

727

28

273 mm

3

(10

/

4")

622 mm

1

(24

/

")

2

LEFT SIDE

All GG and GXH

23

584

1

5

10

9

421

16

2

/

152

6

1353

53

330

13

248

9
11/4
21/

89

31/

248

93/4

5

/8

152 – 327 mm (6 – 12-7/8")

832 mm

3

(32

/4")

337 mm

1

(13

/4")

57 mm

1

(2

/4")

1

26

673

/

2

1915/

55
14
11

508

20

16

152

7

6

1

/2

1

298

11

/4

506

16

/

178

1

1410

/4

356

3

286

/4

11/4

2

2

1

2

/

89

248

2

21/

2

31/
93/4

1

2

/

727

Install Man-

ual Shut­Off Valve

1524 mm (5

ft.) Above

When

Required

By Local

Code

28

1

26

673
506

1915/

178

7

1410

55

356

14

3

286

11

/4

11/4
21/

89

31/

248

93/4

5

/8

57

mm

1

(2

/4")

419 mm

1

(16

/2")

FRONT VIEW

All GG and GXH

1

26

/

673

2

1

1

/4

/

2

506

16

1915/

178

7

1

1410

55

/2

356
286

/2

14

1

11

/4

1

591

23

16

178

7

1

343

13

/2

11/4

2

2

1

2

/

248

2

21/

89

2

31/
93/4

1

2

/

mm

76

(3")

727

5

28

/8

756
592

4

/

178

1410

356
286

89

248

Return Tap-

ping G on

right side of

boiler

673 mm

(26

3

29

/

4

16

239/

7

1

55

/2

14

1

11

/4

11/4

2

21/

2

31/
93/4

3

4

/

1

/2")

184 mm

3

29

756

/

4

592

16

239/

178

7

1

1410

55

/2

356

14

330

13

1

1

/4

2

21/

89

2

31/

248

93/4

3

4

/

Tankless Heater
Connections "L"

GXH-PT only

318 mm

1

/

")

(12

2

1

(

2

/4"

)

RIGHT SIDE

GG / GXH-PT

826
662
178

1410

356
375

248

70 mm

3

(2

1

32

/

261/

7

1

55

/

14

3

14

/
11/4
21/2

89

31/2
93/4

3

/

4

/

")

660
mm

(26")

ORIFICE SIZES indicated for Sea Level are factory installed in boiler unless other-

wise specified by the local authority.
See page 15 for burner adjustment.
GAS VALVE CONNECTION Size is 1/2" f.p.t. for all sizes up to and including GG­125 and GXH-125 depending upon configuration (natural, L.P., IID). Larger boilers,
gas valves are 3/4".

COMBUSTIBLE FLOOR KIT increases all height dimensions by 51 mm (2").
RAISED SLAB—When mounting boiler on a raised slab, the slab must extend at

least 51 mm (2") beyo

nd the boiler cabinet on all sides.

CHIMNEY HEIGHT: 4.5 m (15 ft.) minimum from draft hood skirt to top of chimney.
CHIMNEY INSIDE DIAMETER must be same as Dimension “C” or larger. Larger

diameter and/or height may be required if two or more boilers or a boiler and
another appliance are vented to a single chimney.

BOILER MODEL GAS TYPE

GG Natural 42 43 43

Except GG-399H Propane 54 55 55

GG-399H
GXH-105 Natural 44 43 45

through 275 Propane 54 55 55
GXH-300
GXH-300H Natural 43 44 44

GG-350H Gas*

Natural 40 42 42

Propane 53 54 54

Natural 43 44 44

Propane 55 54 56

*For L.P. Propane gas, consult factory.

32

826

2

662

261/

16

178

1410

55

2

356

14

375

14

4

89

248

4

1-1/4"

Tapping on

Steam Boilers

648 mm

1

(25

Orifice Size for

Sea Level

1

2

/

16

7

1

/2

3

/4

11/4

2

21/
31/2

4

93/

3

/4

Tankless Heater
Connections "L"

except GXH-PZ

826
662
203

1718

635
375

248

2

321/

826

16

261/

662

8

229

5

67

/8

1502

25

3

14

/4

11/4

2

21/

89

31/2

4

93/

3

/4

318
mm

1

(12

/

")

2

/2")

419 mm

1

(16

/

")

2

184
mm

1

/4

(7

")

RIGHT SIDE

GXH--PZ-PZT-PPZT

ORIFICE SIZES AT HIGH ALTITUDES

610 to 1219 m

(2000 to 4000 ft.)

381
375

248

321/
261/

59
15
14

89

70

mm

3

(2

/

2

16

Field Control (Effikal) Vent Damper

9

C H I

1

/8

127mm 152mm 122mm

(5") (6") (4-13/16")

152mm 165mm 135mm

3

/4

(6") (6-1/2") (5-5/16")

11/4

178mm 179mm 149mm

(7") (7-1/16") (5-7/8")

2

21/

203mm 205mm 175mm

31/2

(8") (8-1/16") (6-7/8")

228mm 276mm 225mm

4

93/

(9") (10-7/8") (8-7/8")

3

/4

254mm 327mm 276mm

(10") (12-7/8") (10-7/8")

"

4

)

660
mm

(26")

1219 to 1372 m

(4000 to 4500 ft.)

927
764
254

1680

457
413

235

1

36

/2
301/16
10

1

66

/8
221/

2

4

161/

11/4

2

11/

70

23/4
91/4

GALAXY 3

INSTALLATION REQUIREMENTS

The installation must conform to the requirements of the author­ity having jurisdiction or, in the absence of such requirements,
to the National Fuel Gas Code, ANSI Z223.1-latest edition or
CSA B 149.1 latest edition for natural gas and propane.

This installation must also conform to the additional require­ments in this Slant/Fin instruction book. Installation and service
to be performed by a qualified installer, service agency or the
gas supplier.

NATURAL GAS-FIRED BOILER LOCATION—

Provide a level, solid foundation for the boiler. Location should
be as near the chimney as possible so that the flue pipe from
boiler to chimney is short and direct.

Automatic gas ignition system components shall be installed so
these components will not be subjected to dripping water dur­ing installation or service.

WARNING

SPECIAL ATTENTION FOR LIQUEFIED

PETROLEUM(L.P.)

PROPANE GAS-FIRED BOILER INSTALLATIONS

LPG appliances (boilers) shall be installed in
accordance with applicable provisions of NFPA 58
(Liquefied Petroleum Gas Code) latest edition for
installations in US and CAN/CGA B149.1 latest
edition for installations in Canada

Liquefied Petroleum (LP) propane gas is heavier than
air therefore Propane gas can accumulate at floor level.
If you suspect a leak, do not attempt to operate boiler.
A spark or flame from the appliance (boiler) or other
sources may ignite the accumulated propane gas
causing an explosion or fire. It is recommended that
inspections for gas leaks be performed periodically by
a licensed professional and that leak detection devices
be installed as a further safety measure.

BOILER FOUNDATION

A. Provide a solid, level foundation, capable of supporting the

weight of the boiler filled with water, and extending at least
51 mm (2") past the jacket on all sides. See dimensions of

boilers, page 2.
B. For installation on non-combustible floors only.*
C. If boiler is to be located over buried conduit containing

electric wires or telephone cables, consult local codes

or the National Board of Fire Underwriters for specific

requirements.

* The Combustible Floor Kit part number printed on the boiler rating plate is

the only one to be used when installing on combustible floors. The boiler
must NOT be installed on carpeting.
DO NOT place boilers above floor area containing radiant tubing.

CHIMNEY REQUIREMENTS—

A. Galaxy boilers may be vented into a masonry vitreous tile-

lined chimney UL listed or Type “B” Venting system NOT
EXPOSED to the OUTDOORS below the roof line.
Venting and sizing of venting system must be in accordance
with the requirements of the local gas utility, local building
codes and other authorities having jurisdiction.
If a masonry chimney is exposed to the outdoors on one or
more sides below the roof line (exterior chimney), ONE of the
following options apply:

1. Chimney must be re-lined with an approved metallic liner.
When this is done, the chimney UL

listed will be considered
NOT exposed to the outdoors and the requirements of the
National Fuel Gas Code for NON-exposed chimneys
and/or local codes will apply.

2. If an UL listed exposed tile-lined chimney is to be used
WITHOUT a metallic liner, the boiler must first meet the
requirements of the following tables and paragraphs of the
National Fuel Gas Code:

I. For Single Galaxy Boiler—Paragraph 11.2.9 and table

11.11.

II. For multiple appliances—Paragraph 11.3.18 and table

11.12 (or 11.13 if applicable).
In addition, all requirements of the local gas utility, local
building codes and other authorities having jurisdiction
apply.

B. If an existing boiler is removed from a common venting sys-

tem, the common venting system may be too large for proper
venting of the remaining appliances connected to the com­mon vent. Follow the test procedure shown in Appendix "A"
on page 23 of this manual to insure proper operation of vent­ing system and appliances.

C. Inspect for proper and tight construction. Any restrictions or

obstructions must be removed. An existing chimney may
require cleaning.

D. Chimney or ven

t must extend at least 914 mm (3 feet) above
its passage through a roof and at least 914 mm (3 feet) above
any ridge within 3048 mm (10 feet) of the chimney.

MINIMUM CLEARANCES FROM COMBUSTIBLE
CONSTRUCTION —

A. Minimum boiler clearances shall be as follows:

GALAXY GG SERIES

MODELS GG-75H
THROUGH GG-225H.
MINIMUM CLEARANCE
FOR COMBUSTIBLE
CONSTRUCTION.
MINIMUM CLOSET
CLEARANCE.
Front 152 mm (6")
Rear 152 mm (6")
Left Side 152 mm (6")
Right Side 152 mm (6")
Top 914 mm (36")*
Flue

Connector 152 mm (6")

Type 'B' Vent 25 mm (1")

MODELS GG-250
THROUGH GG-399H.
MINIMUM CLEARANCE
FOR COMBUSTIBLE
CONSTRUCTION.
MINIMUM ALCOVE
CLEARANCE.
Front Alcove
Rear 152 mm (6")
Left Side 152 mm (6")
Right Side 152 mm (6")
Top 914 mm (36")*
Flue

Connector 152 mm (6")

Type 'B' Vent 25 mm (1")

* Allow extra clearance from combustibles for additional venting.

GALAXY GXH SERIES

4 GALAXY

* Allow extra clearance from combustibles for additional venting.

B. Provide accessibility clearance of 610 mm (24") on sides

requiring servicing and 457 mm (18") on sides used
for passage.

C. All minimum clearances shown above must be met. This may

result in increased values of some minimum clearances in
order to maintain the minimum clearances of others.

D. Clearance from steam and hot water pipes shall be

25 mm (1"). **

** At points where hot water or steam pipes emerge from a floor, wall or ceil

ing, the clearance at the opening through the finished floor boards or wall
or ceiling boards may be not less than 13 mm (

1

/2"). Each such opening

shall be covered with a plate of noncombustible material.

SAFETY—

VENT PIPING—

A. Vent piping installation must be in accordance with the

requirements of the local gas utility, local building codes and
other authorities having jurisdiction.

B. Boiler vent pipe must be the full diameter of the boiler draft

hood outlet. See dimensions, page 2. If a vent damper is
added, its diameter must be equal to the hood outlet and
must be located past the hood outlet. See installation
instructions furnished with vent damper and in the section
"Vent Damper Installation" of this instruction book.

C. If more than one appliance vents into a common breeching,

the area of the breeching must be equal to the area of the
largest vent plus 50% of the area of the additional vent areas.
Vent connectors serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure. Horizontal
breeching or vent pipe should be as high as possible, con­sistent with codes, so that vertical vents from appliances will
have a high rise above draft diverter openings. All horizontal
runs must slope upwards not less than 20 mm/m (

1

/4 inch per
foot) of run. Horizontal portions of the venting system must
be supported to prevent sagging by securing each joint with
metal screws and by providing hangers spaced no greater
than 1524 mm (5 feet) apart.

D. Vent or breeching into chimney should not be inserted past

the inside wall of the chimney liner.

E. All venting means should be inspected frequently. See Care

and Maintenance and separate User's Information Manual.

GAS PIPING—

A. Local installation codes apply. The pipe joint compound used on

threads must be resistant to the action of liquefied petroleum gases.

B. The gas supply line to the boiler should be run directly from the

meter for natural gas or from the fuel tank for L.P. propane gas. See
page 2 for location of union and manual main shut-off valve that may
be specified locally.
Selecting pipe size for natural gas:

1. Measure or estimate the length of piping from the meter to the
installation site.

2. Consult gas supplier for heating value of gas-W/m

3

(BTU/cu. ft.).

3. Divide boiler rated input by heating value to find gas flow in pip­ing (m

3

/hr) (cu. ft. per hour).

4. Use table below to select proper pipe size.

Example: Boiler model GG-300 is to be installed. Distance from gas
meter to the boiler is 15.24 m (50 ft). Heating value of natural gas is
10560 W/m

3

(1020 BTU/cu. ft.) Select proper pipe size.

At 15.24 m (50 ft.) length of pipe, match required capacity from
table below (choose higher capacity, in this case 12.5 m

3

(440 cu.

ft.) per hour). Required pipe size is 1

1

/4".
Improper gas pipe sizing will result in pilot flame outages, insuffi­cient heat and other installation difficulties. For more information
and also if other appliances are to be attached to the piping system,
see Appendix C of National Fuel Gas Code ANSI Z223.1-latest edi­tion or

CSA B 149.1 latest edition for natural gas and propane

.

C. The boiler and its gas connection must be leak tested before plac-

ing the boiler in operation. Use liquid soap solution for all gas leak
testing. DO NOT use open flame.
This boiler and its individual shutoff valve must be disconnected
from the gas supply piping system during any pressure testing of
that system at test pressures in excess of 3.5 kPa (

1

/2 PSIG). This
boiler must be isolated from the gas supply piping system by clos­ing its individual manual shutoff valve during any pressure testing
of the gas supply piping system at test pressures equal to or less
than 3.5 kPa (

1

/2 PSIG).

D. All gas piping used should be inspected thoroughly for cleanliness

before makeup. A sediment trap must be provided, as illustrated on
page 2.

E. The minimum and maximum gas supply pressure (at the inlet of gas

valve) are shown on the boiler rating plate for the type of gas used.
Gas supply pressure should never be less than minimum or more
than maximum pressure when the boiler or any other appliance is
turned on or off.

MODELS GXH-105
THROUGH GXH-190
MINIMUM CLEARANCE
FOR COMBUSTIBLE
CONSTRUCTION.
MINIMUM CLOSET
CLEARANCE.
Front 152 mm (6")
Rear 152 mm (6")
Left Side 152 mm (6")
Right Side 457 mm (18")
Top 914 mm (36")*
Flue

Connector 152 mm (6")

Type 'B' Vent 25 mm (1")

MODELS GXH-210 TO
GXH-300H.
MINIMUM CLEARANCE
FOR COMBUSTIBLE
CONSTRUCTION.
MINIMUM ALCOVE
CLEARANCE.
Front Alcove
Rear 152 mm (6")
Left Side 152 mm (6")
Right Side 457 mm (18")
Top 914 mm (36")*
Flue

Connector 152 mm (6")

Type 'B' Vent 25 mm (1")

KEEP THE BOILER AREA CLEAR AND FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE AND OTHER
FLAMMABLE VAPORS AND LIQUIDS.

Gas flow =

= 8.3 m3/hr

87 930 W/hr

10 560 W/m

3

(Gas flow = = 294 cu. ft. per hour)

300,000 BTU/hour

1020 BTU/cu. ft.

1

/2"

3

/4"1"1

1

/4"1

1

/2"

mft

m3/hr cu.ft./ hr. m3/hr cu.ft./ hr. m3/hr cu.ft./ hr. m3/hr cu.ft./ hr. m3/hr cu.ft./ hr.

3.0 10 3.7 132 7.9 278 14.7 520 29.7 1050 45.3 1600

6.1 20 2.6 92 5.4 190 9.9 350 20.7 730 31.1 1100

9.1 30 2.1 73 4.3 152 8.1 285 16.7 590 25.2 890

12.2 40 1.8 63 3.7 130 6.9 245 14.2 500 21.5 760

15.2 50 1.6 56 3.3 115 6.1 215 12.5 440 19.0 670

18.3 60 1.4 50 3.0 105 5.5 195 11.3 400 17.3 610

21.3 70 1.3 46 2.7 96 5.1 180 10.5 370 15.9 560

24.3 80 1.2 43 2.5 90 4.8 170 9.9 350 15.0 530

27.4 90 1.1 40 2.4 84 4.5 160 9.1 320 13.9 490

30.5 100 1.1 38 2.2 79 4.2 150 8.6 305 13.0 460

Length
of Pipe

Gas Flow In Piping

Pressure drop=8mm(0.3") water column, 0.60 specific gravity gas.

Iron Pipe Size (Ips) inches

At pressure drop of 0.3 in. water, specific gravity = 0.60 gas.

GALAXY 5

BOILER ROOM AIR SUPPLY AND VENTILATION

An ample supply of air is required to obtain combustion and ven­tilation. ALL AIR COMES FROM OUTSIDE, directly through wall
openings to the boiler or through unsealed openings around win­dows, doors, etc. in the whole building. When buildings are insu­lated, caulked and weather stripped, now or later on, direct
openings to outside may be required and should be provided. If
the boiler is not near an outside wall, air may be ducted to it from
outside wall openings.
Provisions for combustion and ventilation air must be made in
accordance with section 5.3, Air for Combustion and Ventilation,
of the National Fuel Gas Code, ANSI Z223.1-latest edition or CSA
B 149.1 latest edition for natural gas and propane, or applicable
provisions of the local building codes. The following recommen­dation applies to buildings of energy-saving construction, fully
caulked and weather stripped:

INSTALLATION IN ENCLOSED BOILER ROOM REQUIRES
TWO UNOBSTRUCTED OPENINGS FOR PASSAGE OF AIR
INTO THE BOILER ROOM:

A. Air drawn horizontally from outdoors DIRECTLY through

an outside wall; one louvered opening near the floor and
one louvered opening near the ceiling, each opening with a
minimum FREE air passage area of 550 mm

2

per kW (1

square inch per 4000 BTUH) of total appliances’ input.

B. Air drawn horizontally through HORIZONTAL DUCTS;

one opening near the floor and one opening near the ceiling,
each opening with a minimum FREE air passage area of

1100 mm2per kW (1 square inch per 2000 BTUH) of total
appliances’ input.

C. Air drawn VERTICALLY from outdoors; one opening at the

floor and one opening at the ceiling, each opening with a
minimum FREE air passage area of 550 mm

2

per kW (1

square inch per 4000 BTUH) of total appliances’ input.

D. Air drawn from inside the building; one opening near the

floor and one opening near the ceiling, each opening with a
minimum FREE air passage area of 2200 mm

2

per kW (1

square inch per 1000 BTUH) of total appliances’ input.

DRAFT HOOD—

The draft hood supplied is part of the listed boiler assembly. DO
NOT alter the hood. See dimensions, page 2.

Attach the hood to the boiler flue outlet. Connect flue pipe full
size of hood outlet. If a vent damper is added, it must be
installed on the outlet side of the hood. See Vent Piping on
page 4,7 and 8 ( Figures 4, 5, 6,7 ).

PIPING AT BOILER — WATER PIPING

A. CIRCULATING SYSTEMS

1. Packaged water boilers are equipped with a water circulat-

ing pump, mounted to return the water into the boiler. For
some installations, the pump should be on the supply
main. See PUMP LOCATION, on page 6.

B. AIR CONTROL SYSTEM

1. DIAPHRAGM-TYPE COMPRESSION TANKS are used to

SPECIAL FLUSHING INSTRUCTIONS

Installation of new boiler may break loose a heavy
accumulation of sediment and scale from old pip
ing and radiators. It is extremely important to blow
down your McDonnell Cut off 67 more frequently
the first week.
First week 3 times
Thereafter at least once a week
* Exception: McDonnell Cut off 42A must be blown

down daily.

See "CARE & MAINTENANCE" for instructions.

3/4" RELIEF
VALVE

3/4" RELIEF
VALVE

1

/2" O.D. TUBE
CUT TO SIZE
AT THIS END

5

/8" COMP. ADAP.

FITTING

1

/4" × 1/4" × 1/4"

1

/4" SIPHON

3

/8" MALE PIPE TO 1/2"

O.D. COMP. ADAP.

NIPPLE
1/2 × 2"

TEE

1

/2 × 1/2 × 1/2"

TEE 1/2 × 5/8" ADAPTER

NIPPLE

1

/2 × 51/2 " THD AT

BOTH ENDS

NIPPLE 1/4 × 21/2"

ADAPTER

WATER LEVEL
648 mm (251/2")

OFF FLOOR

ELBOW

1/4" × 90°

NIPPLE 1/4" ×

CLOSE

NIPPLE

1

/2 × 6" THD AT

BOTH ENDS

RNATEALTE

WFLO

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TURNRE

TURN

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d

control system pressure in an AIR ELIMINATING SYSTEM:
an automatic air vent is used to REMOVE air from the sys­tem water. See illustration on page 5.

If system pressure needs further control, add an additional
tank or install a larger capacity tank.
Locate the tank near the boiler, as illustrated.
An automatic air vent should be installed in the top of the
boiler. See illustration on page 5.

2. PUMP LOCATION — Locating low-head pump(s) on return
to boiler is acceptable for smaller boiler sizes in resi ­dences of one or two stories. The alternate pump location
shown in illustration on page 5 is required in large, multi­story building installations, especially when high-head
pumps are used. The compression tank must be at the
boiler or between boiler and supply main pump(s).

3.On a hot water boiler installed above radiation level,the

boiler must be provided with a low water cut-off device at
the time of installation by the installer.

Flow Control Valve: When domestic hot water tankless heater is used,
a flow control valve should be installed in supply piping to heating sys
tem, as shown in illustration on page 5.

INSTALLATION INSTRUCTIONS FOR GXH LOW PRESSURE
STEAM BOILERS EQUIPPED WITH TANKLESS OR
PROVISION FOR TANKLESS AND McDONNELL & MILLER
TYPE 67 LOW WATER CUT-OFF.

STEAM CONTROLS ASSEMBLY AND INSTALLATION
INSTRUCTIONS

Steam kit components for Galaxy packaged models are packed
as follows:
A. 1. Low water cut-off control

2. Fittings

3. L.W.C.O. instruction sheet

B. 1.Pressure gauge

2. High pressure limit control

3. Water level gauge

4. Fittings

5. Instruction sheet and assembly drawing

6. Steam safety valve and

3

/4" street coupling

7. Drain cock

Assemble above components exactly as shown in steam controls
assembly. Two

1

/2" tappings are on right side of boiler for this
assembly. Two holes are pre-punched in jackets. For conve­nience, start assembling in the following steps:
C. 1. Install

1

/2" x 51/2" brass nipple onto tee of L.W.C.O.

2. Mount

1

/2" x 51/2" brass nipple into lower boiler tapping by

rotating low water cut-off.

3. Assemble 90° brass tubing to tee adapter and L.W.C.O.

4. Install

1

/2" x 6" brass nipple and 1/2" × 5/8" adapter tee in upper

boiler tapping.

5. Install syphon, high pressure limit and pressure gauge with

1

/4" brass fittings.

6. Install water level gauge (without glass) and its fittings.

7. Install water level glass, and mark the glass 648 mm (25

1

/2")
from the bottom of the steel boiler base for the water level.
(The steel boiler base should not be confused with a
combustible floor kit when making the 648 mm (25

1

/2")

measurement.)

8. Drain cock will be installed in return tee at the lower right side
of casting.

9. Safety valve and

3

/4" street coupling should be installed in 3/4"

tapping on top of boiler.

6 GALAXY

PIPING A LOW PRESSURE STEAM BOILER

Boilers must be piped with good engineering practice and
must conform to the requirements of ANSI/ASME Boiler and Pres­sure Vessel Code section IV and to the authority having
jurisdiction.
Notes:
A. Slant/Fin makes no recommendation, nor does Slant/Fin imply

that One Pipe Parallel and Counterflow Gravity Condensate
Return systems shown on page 7 are the preferred systems.
These systems are merely two examples of many possible sys­tems. Determination of the proper system is based upon the
application and is therefore beyond the scope of this instruction.

B. The 457 mm (18") minimum height shown in figures 1-3, is the

minimum height between the top of the jacket of the boiler and
the 2

1

/2" x 12" header centerline in the supply piping from the
boiler. It must NOT be confused with the minimum height
between the water level and the lowest return bend of the steam
supply main. This height is "H" as shown in figures 2 and 3.
The minimum height of "H" must be at least equal to the sum of
the pressure drop of the system plus three times the friction loss
of the wet return, but not less than 457 mm (18") for a system
with a 0.9 kPa (

1

/8" psi) steam pressure drop and not less than

28" for a system with a 3.5 kPa (

1

/2 psi) steam pressure drop.

C. Modern steam boilers are smaller in water content than the

boilers that they replace, therefore a mechanical return system
(pump, receiver, etc.) must be employed if conditions exist
such that uniform condensate return flow to the boiler cannot
be maintained.
Pocketing of condensate and the inability to maintain the cor­rect minimum height between the steam supply main and the
water level in the boiler are but a few of the many conditions
that indicate the use of a mechanical return system.
Any use of a receiver and pump must be coordinated with the
makeup water and controlled by the boiler water level control
on the boiler. This description is typical of a boiler feed pump
as opposed to a condensate pump that pumps condensate
regardless of the water level in the boiler.

D. In any steam system one of the requirements is the removal of

air from the system. A mechanical return system in most cases
has an air vent on the receiver. A gravity return system has no
receiver, so provisions for air removal must be made on the
piping itself. A one pipe system has the air vents on the radia­tion, the heat exchanger and near the end of the steam supply
main (see figures 2 and 3).
Main air vents should be located fifteen inches from the drop
and if possible eight inches above the pipe so that water
hammer does not damage the vent and render the vent
inoperable.
For more information on air vents, check with any manufac­turer of steam accessories (steam traps, boiler feed pumps,
air vents, etc.).

E. Process water applications involving steam boilers requires

the use of heat exchangers. Any process application that
constantly uses fresh water into a steam boiler can and will
cause scaling with deposits forming in the boiler and sur­rounding piping. This will damage the boiler.

F. If valves are used on the supply side of the boiler, the valve

port opening must be the same size as the surrounding pipe.
(Full flow type valves.)

G. Piping should provide a means of cleaning and flushing the

heating system of the sediment for safe, efficient operation.

GALAXY 7

RECOMMENDED PIPING FOR A ONE PIPE PARALLEL
FLOW LOW PRESSURE STEAM HEATING SYSTEM WITH A
WET OR DRY GRAVITY (See Note No. C under "Piping a low
pressure steam boiler") CONDENSATE RETURN AND A
HARTFORD† LOOP.
See Note No. A on page 6 under "Piping a low pressure
steam boiler".

FIGURE 1

† A Hartford Loop is recommended for low pressure steam systems with

gravity condensate returns.
Pipe sizes shown above for Hartford Loop are recommended by
Slant/Fin. However, certain local codes may require larger pipe sizes.
Consult with local authorities.

∇ The equalizer should be full size from the steam supply to the operating

water level.

* Hot water fill is preferable. For auto feedings, see manufacturer's techni-

cal instructions.

FIGURE 2

* Hot water fill is preferable, but not required. For auto feeding, see manufac-

turer’s technical instructions.

** See item B, page 6, under "Piping a low pressure steam boiler"

Counter flow piping is sized one pipe size larger than a parallel flow piping. This
allows steam to travel in one direction while the condensate travels in the other
direction. This along with a steeper pitch is a must for safe, efficient operation.
** See item B, page 6, under "Piping a low pressure steam boiler"

FIGURE 3

HEADER 21/2"×12" CENTRE TO
CENTRE

2-1/2 × 2-1/2 × 2-1/2" TEE

2-1/2" UNION

1-1/2" Union

1-1/2" Plug

1- 1/2 × 3/4 "
Bushing

400 mm (15-

3/4")

337 mm
(16-1/2")

648 mm

(25-1/2")

2-1/2" Supply

457mm (18") Minimum Height

1- 1/2" × 1-1/4 "

Reducing Cou-

pling

2-1/2 ×1-1/2×1-1/2" TEE

51 mm (2")

1-1/2" Cross

11/4" Nipple

1-1/2" Nipple

∇

203
mm
(8")

381

mm

(15")

400 mm
(15-3/4")

419 mm

(16-1/2")

648 mm
(25-1/2")

457 mm (18") Minimum Height

400 mm
(15-3/4")

419 mm

(16-1/2")

648 mm
(25-1/2")

457 mm (18") Minimum Height

**

**

WARNING—DANGER

Once you have begun vent damper installation procedure, DO
NOT restore electric power and gas supply until installation and
inspection have been completed (in order to prevent the main
burners from operating). DO NOT operate the boiler until the vent
damper harness "FEMALE PLUG" is plugged into "MALE PLUG"
(as described in the installation instructions), and the vent
damper installation and checkout procedures have been
completed. Failure to observe this warning may create a
hazardous condition that could cause an explosion or carbon
monoxide poisoning.

51 mm (2")

VENT DAMPER INSTALLATION

The vent damper referred to in the following instructions is the
Slant/Fin LTD/LTEE vent damper.
A. This device is design certified by C.S.A. for use ONLY on spe-

cific Slant/Fin gas boiler models. These boilers must also be
equipped with a plate which states that the boiler must or may
be used with a Slant/Fin automatic vent damper device and
indicates the proper vent damper model number.

8 GALAXY

B. INSTALLATION INSTRUCTIONS BEFORE YOU START TO

INSTALL

1. Read this installation manual, the "DANGER" plate
attached to the top of the boiler, the "WARNING" on the
wiring diagrams, vent damper carton and operator cover.

2. Perform pre-installation inspection as required by ANSI
specification Z21.66 or CSA B 149.1 latest edition for nat­ural gas and propane.

3. Turn off all electrical power, gas supply and wait for sys­tem to cool (for previously installed boilers).

4. Carefully unpack the unit. DO NOT FORCE IT OPEN OR
CLOSED! Forcing the damper may damage the gear train
and void the warranty.

5. This device must be installed after the appliance draft
hood (between the draft hood outlet and the connector to
the outdoor chimney or vent) as close to the draft hood as
practicable, and without modification of the draft hood or
the damper. (See figures 4 and 5.)

6. The inlet size of the vent damper must be the same nomi­nal trade size as the outlet of the draft hood.

7. This device must be located in a venting system or section
of a venting system so that it serves only the single appli­ance for which it is installed. (See fig. 10.)

8. Clearances of not less than 152 mm (6 inches) must be
maintained from combustible materials, with provisions for
access for service.

C. NOW, PROCEED AS FOLLOWS:

1. Separate the vent pipe directly on top of the draft hood or
diverter and place damper in position as shown in figures
4–7 and 11–12. The vent damper must be installed so that
the damper position indicator is in a visible location after
installation. See figure 7 for position indicator description.
The arrow imprint on the damper should point in direction
of vent gas flow (towards chimney). Re-assemble the vent
piping. Be sure the vent damper is well seated and fas­tened with 3 sheet metal screws. Screws should be no
longer than 13 mm (

1

/2 inch). See figure 12 .

2. Be sure that undersized vent pipe does not block move­ment of damper vane (see figure 7).

3. Boilers that have a vent damper are factory wired with a
male plug.

i) Attach the flexible metallic conduit vent damper harness

to the right hand side of the jacket by passing the free
end of the harness through the 22 mm (

7

/8") diameter
hole in the top of the jacket, and using the BX con ­nector at the free end of the metallic conduit, fasten to
jacket.

ii) Connect "FEMALE PLUG" (free end of vent damper har-

ness) into "MALE PLUG" (see correct wiring diagram for
intermittent pilot).

iii)The other end of the flexible metal conduit has a small

molex plug and a 90 degree metal conduit connector.
Route the molex receptacle through the conduit bracket
on the vent damper. Place the harness receptacle into
the damper plug. Securely fasten the harness conduit
connector to the conduit bracket by carefully pushing it
into the hold in the bracket.

4. All Slant/Fin Galaxy steam boilers equipped with intermit­tent pilot ignition systems are factory wired except for the
wires to the low water cut-off and pressure cut-off. Wire
these controls with wire provided with boiler (see boiler
wiring diagram on boiler). Then follow previous instruc­tions shown in #4 above.

5. Restore electrical power and turn on gas supply.

FIGURE 4

FIGURE 5

FIGURE 6

FIGURE 7

FEMALE PLUG

FEMALE PLUG

NOTE: DAMPER POSITION INDICATOR

MAY BE VIEWED THROUGH HOLE
IN THE SIDE OPPOSITE THE
OPERATOR.

UNDERSIZED VENT PIPE MAY
BLOCK THE MOVEMENT OF THE
DAMPER VANE. IF THIS OCCURS,
CUT OFF 1/2 OF THE MALE
(CRIMPED) END OF VENT PIPE
AND REFIT.

* May be plugged with plug provided

ONLY if boiler is equipped with
intermittent ignition pilot.

7/8"

DIA. K.O.

Continued on page 14