Cambridge BLOW-THRU, DIRECT GAS-FIRED INDUSTRIAL BLOW-THRU User Manual

S-SERIES

DIRECT GAS-FIRED

INDUSTRIAL BLOW-THRU® SPACE HEATER

TECHNICAL MANUAL

mWARNING:

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.

FOR YOUR SAFETY

The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous.

FOR YOUR SAFETY

If you smell gas: 1. Open windows.

2. Don’t touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier.

Made in the USA

ASHRAE

90.1

COMPLIANT

® ®

S-TM8-0120

S-SERIES

BLOW-THRU® SPACE HEATER

TECHNICAL MANUAL

LIMITED WARRANTY

Cambridge Air Solutions' Limited Warranty is included within the Terms and Conditions that are sent with every Order Acknowledgement. For questions regarding Limited Warranty, contact Cambridge Air Solutions' Customer Service Group at 1-800-473-4569.

	Cambridge Air Solutions
	760 Long Road Crossing Dr.
Copyright © 2020	Chesterfield, MO. 63005
	Phone: (636) 532-2233, (800)	899-1989
Cambridge Air Solutions	Fax: (636)	530-6133
All Rights Reserved	www.cambridgeair.com

CONTENTS

Hazard Summary.................................................	2
Typical System Overview....................................	3
Accessory Identification.............................	3
Heater Operation........................................	5
Heater Configuration..................................	5
Installation Instructions.......................................	6
Uncrating Instructions................................	6
Mounting Location.....................................	6
Roof Top Mounting -
Curb / Stand / Rail......................................	7
Roof Top / Thru Wall Mounting -
Stand / Rail.................................................	8
Under Roof Mounting - Curb.....................	8
Roof Top Mounting....................................	9
Thru Wall Mounting.................................	11
Roof Top / Thru Wall Mounting...............	13
Under Roof Mounting..............................	15
Vertical Indoor Mounting.........................	17
Vertical Outdoor Mounting.......................	19
Vertical S-Series
Structural Inlet Elbow...............................	21
Vertical S-Series Structural
Non-Adjustable Elbow.............................	25
Vertical S-Series Adjustable Stand...........	27
Vertical S-Series 3', 4', &5'
Duct Extensions........................................	30
Vertical S-Series Adjustable Elbow..........	32
Vertical S-Series Structural
Filter Section............................................	34
S-Series 24", 38", & 50"
Wall Sleeves.............................................	37
S-Series Downturn With Lugs .................	39
S-Series Upturn .......................................	41
Horizontal S-Series 4’
Mounting Stand .......................................	43

Vertical Inlet Skirt ....................................		46
Rain Hood Inlet Skirt ...............................		47
Unit Inlet Skirt..........................................		48
Gas Piping................................................		49
Electrical Wiring ......................................		50
Remote Control Station and Temperature
Sensor Locations......................................		51
Thermistor Sensor....................................		53
Start-Up Instructions.........................................		54
Calibration Procedures .....................................		60
Operating Instructions.......................................		63
Operating Sequence..................................		63
Electronic Thermostat...............................		64
TSS Controller .........................................		66
Bacnet Controller......................................		75
Maintenance Instructions...................................		79
Troubleshooting Instructions.............................		83
Troubleshooting Guide.............................		83
Damper Motor Replacement
& Adjustment............................................		89
Reference...........................................................		91
Electrical Control Enclosure
Isometric Drawing....................................		91
Electrical Wiring Diagrams .....................		92
Remote Control Station Electrical
Connection Diagram ................................		97
Building Automation System...................		98
Gas Train Drawings..................................		99
Individual Component
Descriptions............................................	103
ANSI/ASHRAE/IESNA
Standard 90.1..........................................	109
Maintenance Log.............................................	110
QR Code..........................................................	113

HAZARD SUMMARY

Hazard Identification

Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully.

mWARNING:

mCAUTION:

CAUTION:

Indicates a potentially hazardous situation which could result in death or serious injury.

Indicates a potentially hazardous situation which may result in minor or moderate injury. It may also be used to alert against unsafe practices.

Indicates a situation that may result in accidents with equipment or property damage only.

The following safety precautions apply to the installation, operation, and maintenance of the equipment described by this technical manual.

mWARNING:

Any unauthorized modification of this equipment shall void the warranty.

mWARNING:

Only qualified personnel should attempt installation, service, and repair of this equipment. Use extreme caution and observe safety regulations at all times.

mWARNING:

Recirculation of room air is not permitted.

Adequate building relief must be provided so as to not over pressurize the building when the heating system is operating at its rated capacity. It should be noted that this can be accomplished by taking into account, through standard engineering methods, the structure’s designed infiltration rate, by providing properly sized relief openings, or by interlocking a powered exhaust system, or by a combination of these methods.

If the failure or malfunction of this heater creates a hazard to other fuel burning equipment in the

building, (e.g. when the heater is providing the makeup air to a boiler room), the unit is to be interlocked to open inlet air dampers or other such devices.

If the heater is installed such that an inlet duct is utilized, the duct system must be purged with at least four air changes prior to an ignition attempt.

Installation in Aircraft Hangars

Refer to the Standard for Aircraft Hangars, ANSI/NFPA 409, for specific information on the installation requirements for these heaters in aircraft hangars.

Installation in Parking Garages

Refer to the Standard for Parking Structures, ANSI/NFPA 88A, or the Standard for Repair Garages, ANSI/NFPA 88B, for specific information on the installation requirements for these heaters in public garages.

Installation in Car Wash Facilities

A non-recirculating, S-Series Space Heater used in a Car Wash tunnel application may be designated as a T-Series Heater on the nameplate.

This S-Series Technical Manual also applies to all T-Series Heaters.

IMPORTANT

If in doubt regarding installation application, contact Cambridge Customer Service Group at 1-800-473- 4569 during the hours of 8:00 a.m. to 5:00 p.m. Central Time, Monday through Friday.

Cambridge Air Solutions

S-Series Technical Manual

TYPICAL SYSTEM OVERVIEW ACCESSORY IDENTIFICATION

Roof Top Mounting

RH-RT	UNIT	MDD	DT

	MC
AMS	MR
AMS

Thru Wall Mounting

RH-TW

MDD

FS	UNIT
ISR	DE

Roof Top / Thru Wall Mounting

RH-RT	UNIT	MDD	WALL SLEEVE
			(BY OTHERS)
			DT
			DE
	AMS	MR
	AMS

Component Identification

AMS	Adjustable Mounting Stand
DD	Discharge Duct
DE	Directional Elbows
DT	Downturn
FS	Filter Section
ID	Inlet Duct
IE	Inlet Elbow
IP	Inlet Plenum
ISR	Inlet Skirt-Rain Hood
ISU	Inlet Skirt-Unit
MC	Mounting Curb
MDD	Motorized Discharge Damper
MR	Mounting Rail
RH-RT	Rain Hood-Roof Top
RH-TW	Rain Hood-Thru Wall

Under Roof Mounting

	IP
	MC
	ID
	MDD	DT
	MDD
IE	UNIT
	UNIT
		DE

Outdoor Vertical Mounting

	WALL SLEEVE
DT	(BY OTHERS)
DT
MDD	DT
	DE
UNIT
	ISU

Indoor Vertical Mounting

DT	DT
	DE
	UNIT
RH-TW
	IE
ISR

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL SYSTEM OVERVIEW ACCESSORY IDENTIFICATION

RAINHOOD FILTER

SECTION

FILTER

SECTION

SUPPORT

DOWNTURN

DUCT

EXTENSION

DIRECTIONAL

ELBOWS

STRUCTURAL

FILTER

SECTION

STRUCTURAL

RAINHOOD INLET

ELBOW

RAINHOOD

EXTENSION

ADJUSTABLE

STAND

ADJUSTABLE

ELBOW

HORIZONTAL

MOUNTING STAND

ADJUSTABLE

STAND

WALL

SLEEVE

DOWNTURN

DUCT

EXTENSION

DIRECTIONAL

ELBOWS

DUCT

EXTENSION

UPTURN

DOWNTURN

WALL

DOWNTURN SLEEVE

DIRECTIONAL

ELBOWS

Cambridge Air Solutions

S-Series Technical Manual

TYPICAL SYSTEM OVERVIEW HEATER OPERATION

Cambridge S-Series Blow-Thru® heaters are utilized to meet the space heating requirements of commercial or industrial buildings. The control system is typically designed to cycle the heaters on and off in response to the rise and fall of the space temperature. The heater will discharge air at the temperature selected (up to

160ºF). The operating thermostat is typically located near the perimeter of the building in a location which is out of the direct path of the heated discharge air, insulated from cold surfaces, and shielded from cold drafts created by air infiltrating the building.

HEATER CONFIGURATION

IGNITER & FLAMEROD

BURNER ASSEMBLY

DAMPER MOTOR

DISCHARGE TEMPERATURE SENSOR

HIGH LIMIT

DAMPER BLADES

ELECTRICAL

CONTROL ENCLOSURE

HINGED ACCESS DOOR
PORT FOR MEASURING
MANIFOLD PRESSURE
MODULATING GAS VALVE
SAFETY SHUT-OFF VALVE
LEAK TEST PORT
SHUT-OFF VALVE
DISCHARGE AIR TEMPERATURE
SAMPLING BOX
REGULATOR
MANUAL SHUT-OFF VALVE	BURNER VIEWPORT

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS UNCRATING INSTRUCTIONS

1.Verify that the number of items on the Bill of Lading matches the number of items received.

2.Check for shipping damage. Take photographs of any damage.

IMPORTANT

If damage is found, immediately file a claim with the carrier before proceeding further.

3.Check the items received to make sure they agree with the ordering information including verification of data on the unit nameplate.

IMPORTANT

Do not discard any components or accessories.

MOUNTING LOCATION

Verify feasibility of the installation location selected with respect to accessibility to the heater for service and maintenance functions. Ensure the positioning of the heater does not inhibit fork truck operation, storage rack locations, or other operations within the facility. Ensure the heater inlet and outlet are not blocked or severely restricted in any way that would

affect the rated airflow through the heater or affect the desired air distribution pattern of the heater.

It is the responsibility of the installer to communicate any potential problems with the installation to

the person or persons responsible for providing the installation instructions or drawings prior to proceeding with the installation.

IMPORTANT

Where the mounting height of the heater is a consideration, work platforms or service lifts should be provided for accessibility to the equipment for service and maintenance activities.

IMPORTANT

Field constructed intake accessories should be designed to minimize the entry of snow and rain.

IMPORTANT

The minimum clearance from the face of the electrical control enclosure to surrounding grounded surfaces for service activities is 42”. Adequate clearance of 42” for burner removal is also required. Access for service functions is also required on the side of the unit opposite the control enclosure for a distance of 24”.

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS

ROOF TOP MOUNTING - CURB / STAND / RAIL

STAND DETAIL
		1
		2
		3
		6
7	10½"	4
		5
2 x 6 TREATED LUMBER		6
(BY OTHERS)
		7

DOWNTURN / CURB

WITH FLASHING

NOTES

TREATED TIMBER AS REQUIRED UNDER MOUNTING CURB, RAIL AND STAND TO SECURE AND LEVEL UNIT.

SECURE MOUNTING STAND TO TIMBER WITH WOOD LAG SCREWS AS SHOWN.

SECOND MOUNTING ASSEMBLY IS REQUIRED ONLY ON UNITS WITH FILTER SECTIONS.

MOUNTING STAND CONSTRUCTION: 12 GA. GALVANIZED STEEL

MOUNTING RAIL CONSTRUCTION: 18 GA. GALVANIZED STEEL

REMOVE HANGER BRACKET AND REPLACE SCREWS

ADJUSTABLE ± 3¾”

		24"
	ROOF INSULATION	REF.
	ROOF INSULATION
2
24"	C
TYP.	C
TYP.
	MOUNTING STAND	4
1	MOUNTING RAIL	5
	MOUNTING RAIL	5

2 X 6 TREATED LUMBER	B
	3

Model	A	B	C
S400/S800	65½”	33¼”	25 3/8”
S950/S1200/S1600	78 5/8”	33¼”	42”
S1850/S2200/S3200	90¼”	36¼”	47 1/8”

CURB SECTION

FLASHING

2 x 2 WOOD NAILER

(PROVIDED)

INSULATION

2.5" 1 5/8"

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS

ROOF TOP / THRU WALL MOUNTING - STAND / RAIL

STAND DETAIL

7 10½"

2 x 6 TREATED LUMBER

ROOF INSULATION

24"	C
TYP.	C
TYP.
	MOUNTING STAND	4
1	MOUNTING RAIL	5
	MOUNTING RAIL	5

NOTES

1TREATED TIMBER AS REQUIRED UNDER MOUNTING RAIL AND STAND TO SECURE AND LEVEL UNIT.

2SECURE MOUNTING STAND TO TIMBER WITH WOOD LAG SCREWS AS SHOWN.

3THIRD MOUNTING ASSEMBLY IS REQUIRED ONLY ON UNITS WITH FILTER SECTIONS.

4MOUNTING STAND CONSTRUCTION: 12 GA. GALVANIZED STEEL

5MOUNTING RAIL CONSTRUCTION: 18 GA. GALVANIZED STEEL

6REMOVE HANGER BRACKET AND REPLACE SCREWS

7STAND IS ADJUSTABLE ±3¾”

		Model	A	B	C
	3	S400/S800	57 7/8”	33¼”	25 3/8”
2 X 6 TREATED LUMBER	B
		S950/S1200/S1600	69 7/8”	33¼”	42”
		S1850/S2200/S3200	75¾”	36¾ ”	47 1/8”

UNDER ROOF MOUNTING - CURB

		CURB SECTION
CURB	24"
	24"
	REF.	2 x 2 WOOD NAILER
		2 x 2 WOOD NAILER
		(PROVIDED)
		INSULATION

ROOF INSULATION

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS ROOF TOP MOUNTING

mWARNING:

Due to the size and weight of this equipment, it is recommended the heater mounting structure be reviewed and approved by a qualified structural engineer and the roof manufacturer before installing this equipment.

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility for service and maintenance functions.

IMPORTANT

To minimize snow and rain ingestion, position the heater inlet opposite the prevailing winds.

mCAUTION

To prevent contaminated air from being drawn into the heater, install the heater’s inlet at least 10 feet from any building exhaust, process exhaust, sewer stacks, or other sources that would allow contaminants to be drawn into the heater. Consult local codes for additional references.

1.Prepare roof penetration to the dimensions below. See page 6 for Roof Top Mounting - Curb/Stand/ Rail drawing.

IMPORTANT

Accurate measurements are critical and will affect the installation process. Verify that the roof opening aligns with the curb opening.

2.Secure the mounting curb and mounting rail(s) per the structural engineer and roof manufacturer’s recommendations.

IMPORTANT

The roof curb and mounting rail(s) should be

installed so that the heater will mount level. Cambridge recommends mounting the heater a minimum of 24” off the roof surface in areas where snow accumulation could impact heater operations.

3.Attach the mounting stands to the heater while the heater is on the ground. Adjust the height of the stands so the heater inlet is slightly (1/8” below level) lower than the discharge. This allows any ingested moisture to drain out of the heater, through weep holes located at the inlet of the heater, onto the roof surface.

4.Lower the discharge duct through the mounting curb and the roof opening and secure the counterflashing to the mounting curb.

5.Use a crane or comparable lifting device to raise and position the equipment. Use a spreader bar to prevent damage and connect slings to the lifting brackets.

mWARNING:

Do not attach lifting means to heater accessories. Make connections to heater only.

IMPORTANT

Inlet accessories may be attached on the ground or on the roof depending on the method chosen by the installer.

6.Caulk all the joints between the heater and the accessories with silicone caulk to prevent water leaks.

IMPORTANT

Do not caulk the downturn/counterflashing for the curb interface.

7.Seal all roof penetrations to prevent roof leaks.

8.Install the directional elbows. Consult the job layout for the orientation of the elbows.

		Roof Opening*
Model	Weight	L	W
S400/S800	550 lbs.	13”	24¾”
S950/S1200/S1600	800 lbs.	15”	41½”
S1850/S2200/S3200	1500 lbs.	24¼”	46½”

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL INSTALLATION

ROOF TOP MOUNTING

RAIN HOOD

FILTER SECTION (OPTIONAL)

UNIT

DOWNTURN ADJUSTABLE MOUNTING STAND

MOUNTING RAIL

ELECTRICAL CONTROL ENCLOSURE

ELECTRICAL JUNCTION BOX (PROVIDED WITH EXTERNAL GAS TRAIN)

EXTERNAL GAS TRAIN WITH ENCLOSURE (APPLICABLE TO SOME FM AND XL GAPS OPTIONS)

FM: FACTORY MUTUAL

XL GAPS: FORMERLY IRI (INDUSTRIAL RISK INSURERS)

NOTE:

DO NOT CAULK

THIS JOINT

COUNTERFLASHING

MOUNTING CURB

DISCHARGE DUCT

DIRECTIONAL

ELBOWS

CURB / RAIL / STAND DETAIL

	2 X 6 TREATED LUMBER	10½"
	(BY OTHERS)	10½"
	(BY OTHERS)

24"

12"

2 X 4 TREATED LUMBER (PROVIDED)

TREATED LUMBER	TREATED LUMBER	ROOF

(BY OTHERS)	(BY OTHERS)	OPENING

TREATED LUMBER (THICKNESS OF ROOF INSULATION) AS

REQUIRED UNDER MOUNTING STANDS AND CURB TO SECURE

AND LEVEL THE UNIT AND TO SPREAD THE LOAD. (BY OTHERS)

* Dimensions allow for ¾” clearance on each side

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS THRU WALL MOUNTING

mWARNING:

Due to the size and weight of this equipment, it is recommended the heater mounting structure be reviewed and approved by a qualified structural engineer before installing this equipment.

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility to the equipment for service and maintenance functions.

mCAUTION

1.Prepare wall penetration to the dimensions below.

2.Connect inlet accessories to the unit including filter section (optional) and rain hood prior to lifting the heater in place. Note the inlet skirt for rain hood (optional) is installed from the outside of the building (page 20).

3.Install hanging rods to adequate ceiling supports and align with the hanging brackets on the unit. Refer to hanging rod size shown on table below. Locate the hanging rods so that the weep holes provided in the rain hood are located a minimum of 3” beyond the outside wall surface.

4.Remove the lag bolts used to fasten the unit to the skid. Do not remove the hanging brackets from the side of the heater. On S400/S800 model heaters, rotate the mounting brackets 180˚ and retighten the securing hardware.

5.Use a forklift or comparable lifting device to raise and position the heater. Take precautions to prevent equipment damage (dents and/or scratches) when the heater is being lifted into position.

6.Use washers and double lock nuts to secure the unit on the hanging rods.

IMPORTANT

The discharge end of the heater should be raised slightly (1/8” above level). This allows any ingested moisture to drain out of the heater through weep holes located in the rain hood to the exterior of the building.

7.Apply shims, by others, at the bottom of the rain hood to take up slack in the opening, leaving a small joint between the top of the rain hood and the wall.

8.Install fiberglass insulation in the gaps around the wall opening and the rain hood. Apply enough material to accommodate the full thickness of the wall.

9.Install finish trim pieces (by others) to the top, sides and bottom of the rain hood on both the inside and outside wall surfaces.

10.Apply silicone caulk at the joint between the top of the rain hood and the outside wall surface. Make certain this is a continuous bead and that it runs the entire width of the rain hood. Caulk all other exposed joints.

11.Install the directional elbows. Consult the job layout for the orientation of the elbows.

			Hanging Rods				Wall Opening**
Model	Weight	Qty.	Size	A	B*	C	H	W
S400/S800	550 lbs.	4 (6*)	3/8” dia.	57 7/8”	33¼”	27 7/8”	26”	25½”
S950/S1200/S1600	800 lbs.	4 (6*)	3/8” dia.	69 7/8”	33¼”	43 7/8”	29”	42¼”
S1850/S2200/S3200	1500 lbs.	4 (6*)	1/2” dia.	75¾”	36¾”	48 7/8”	38¾”	47¼”
*For optional filter section
** Dimensions allow for 1” clearance on each side

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL INSTALLATION

THRU WALL MOUNTING

RAINHOOD		FILTER SECTION
RAINHOOD		(OPTIONAL)
		(OPTIONAL)
		UNIT
			HANGING ROD
			(BY OTHERS)
EXTERIOR WALL TRIM
(BY OTHERS)			DOWNTURN
INTERIOR WALL TRIM
(BY OTHERS)
ELECTRICAL CONTROL ENCLOSURE
INCOMING POWER
VENT w/SCREEN	INLET GAS PIPE		DIRECTIONAL
(LOCATE MIN. 10 FT. FROM INTAKE)	INLET GAS PIPE		ELBOWS
(LOCATE MIN. 10 FT. FROM INTAKE)			ELBOWS
VENT PIPE TO OUTDOORS
(BY OTHERS)
		HANGING BRACKET
CONTROL WIRING CONDUIT		LOW PRESSURE SHUT-OFF VALVE
	(BY OTHERS)	LOW PRESSURE SHUT-OFF VALVE
	(BY OTHERS)
		HIGH PRESSURE REGULATOR (HPR)
REMOTE CONTROL STATION		HIGH PRESSURE SUPPLY TAP	(OPTIONAL)
REMOTE CONTROL STATION
		HIGH PRESSURE SHUT-OFF VALVE
		SEDIMENT TRAP

HANGING BRACKET DETAIL

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

SHIPPING POSITION

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

HANGING RODS, NUTS AND WASHERS BY OTHERS

L BRACKET	C BRACKET
FOR S400 - S800 UNITS	FOR S950 - S3200 UNITS

HANGING ROD DETAIL

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS ROOF TOP / THRU WALL MOUNTING

mWARNING:

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility to the equipment for service and maintenance functions.

IMPORTANT

To minimize snow and rain ingestion, position the heater inlet opposite the prevailing winds.

mCAUTION

1.Prepare wall penetration to the dimensions below. See page 7 for Roof Top/Thru Wall Mounting Stand/Rail drawing.

IMPORTANT

Accurate measurements are critical and will affect installation process.

2.Secure the mounting rails per the structural engineer and roof manufacturer’s recommendations.

IMPORTANT

The mounting rails should be installed so that the heater will mount level. Cambridge recommends mounting the heater a minimum of 24” off the roof surface in areas where snow accumulation could impact heater operations

3.Attach the mounting stands to the heater while the heater is on the ground. Adjust the height of the stands so the heater inlet is slightly (1/8”

below level) lower than the discharge. This allows any ingested moisture to drain out of the heater, through weep holes located at the inlet of the heater, onto the roof surface.

4.Use a crane or comparable lifting device to raise and position equipment. Use a spreader bar to prevent damage and connect slings to the lifting brackets.

mWARNING:

Do not attach lifting means to heater accessories. Make connections to heater only.

IMPORTANT

Inlet accessories may be attached on the ground or on the roof depending on the method chosen by the installer.

5.Install the wall sleeve to the heater discharge.

6.Install fiberglass insulation in gaps around the wall opening and wall sleeve. Apply enough material to accommodate the full thickness of the wall.

7.Install finish trim pieces (by others) to top, sides and bottom of the wall sleeve on both the inside and outside wall surfaces.

8.Apply silicone caulk at the joint between the top of the wall sleeve and the outside wall surface. Make certain this is a continuous bead and that it runs the entire width of the wall sleeve. Caulk all other exposed joints.

9.Seal all roof penetrations to prevent roof leaks.

10.Install the downturn and directional elbows. Consult the job layout for the orientation of the elbows.

		Wall Opening*
Model	Weight	H	W
S400/S800	550 lbs.	16”	28¼”
S950/S1200/S1600	800 lbs.	18”	45”
S1850/S2200/S3200	1500 lbs.	27½”	50”

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL INSTALLATION

ROOF TOP / THRU WALL MOUNTING

	RAIN HOOD
	FILTER SECTION
	(OPTIONAL)
	UNIT
	WALL SLEEVE
	EXTERIOR WALL TRIM
ADJUSTABLE MOUNTING STAND	(BY OTHERS)
	INTERIOR WALL TRIM
	(BY OTHERS)
MOUNTING RAIL
ELECTRICAL CONTROL ENCLOSURE	DOWNTURN

ELECTRICAL JUNCTION BOX	DIRECTIONAL
(PROVIDED WITH EXTERNAL GAS TRAIN)	ELBOWS

EXTERNAL GAS TRAIN WITH ENCLOSURE (APPLICABLE TO SOME FM AND XL GAPS OPTIONS)

STAND DETAIL

	2 X 6 TREATED LUMBER	10½"
	(BY OTHERS)	10½"
	(BY OTHERS)

12"

2 X 4 TREATED LUMBER (PROVIDED)

TREATED LUMBER (BY OTHERS)

* Dimensions allow for 1½” clearance on each side

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS UNDER ROOF MOUNTING

mWARNING:

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility to the equipment for service and maintenance functions.

m CAUTION

1.Prepare roof penetration to the dimensions below. See page 7 for Under Roof Mounting - Curb drawing

IMPORTANT

Accurate measurements are critical and will affect the installation process. Verify that the roof opening aligns with the curb opening.

2.Install the mounting curb and the mounting structure per the structural engineer and roof manufacturer’s recommendations.

IMPORTANT

The mounting curb or mounting structure should be installed such that the heater’s inlet plenum will mount level.

3.Seal all roof penetrations to prevent roof leaks.

4.Lower the inlet duct through the mounting curb and the roof opening.

5.Secure the inlet plenum to the curb.

6.Connect inlet accessories to the heater including filter section (optional) and inlet elbow prior to lifting the heater in place.

7.Install hanging rods to adequate ceiling supports and align with the hanging brackets on the heater. Refer to hanging rod size shown on table below.

8.Remove the lag bolts used to fasten the unit to the skid. Do not remove the hanging brackets from the side of the heater. On S400/S800 model heaters, rotate the hanging brackets 180˚, and retighten the securing hardware.

9.Use a forklift or comparable lifting device to raise and position the heater. Take precautions to prevent equipment damage (dents and/or scratches) when the heater is being lifted into position.

10.Use washers and double lock nuts to secure equipment on the hanging rods.

11.Install the directional elbows. Consult the job layout for the orientation of the elbows.

			Hanging Rods				Roof Opening**
Model	Weight	Qty.	Size	A	B*	C	L	W
S400/S800	550 lbs.	4 (6*)	3/8” dia.	57 7/8”	33¼”	27 7/8”	25”	25”
S950/S1200/S1600	800 lbs.	4 (6*)	3/8” dia.	69 7/8”	33¼”	43 7/8”	30”	41¼”
S1850/S2200/S3200	1500 lbs.	4 (6*)	1/2” dia.	75¾”	36¾”	48 7/8”	37¼”	46¾”
*For optional filter section
** Dimensions allow for ¾” clearance on each side

S-Series Technical Manual

Cambridge Air Solutions

Cambridge BLOW-THRU, DIRECT GAS-FIRED INDUSTRIAL BLOW-THRU User Manual

TYPICAL INSTALLATION UNDER ROOF MOUNTING

CURB DETAIL

FILTER SECTION (OPTIONAL)

TREATED LUMBER (THICKNESS OF ROOF INSULATION) AS REQUIRED UNDER MOUNTING CURB TO SECURE AND LEVEL THE UNIT AND TO SPREAD THE LOAD. (BY OTHERS)

HANGING BRACKET DETAIL

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

SHIPPING POSITION

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

HANGING RODS, NUTS AND WASHERS BY OTHERS

L BRACKET	C BRACKET
FOR S400 - S800 UNITS	FOR S950 - S3200 UNITS

HANGING ROD DETAIL

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS VERTICAL INDOOR MOUNTING

mWARNING:

Due to the size and weight of this equipment, it is recommended the heater mounting structure be reviewed and approved by a qualified structural engineer before installing this equipment.

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility to the equipment for service and maintenance functions.

m CAUTION

1.Prepare wall penetration to the dimensions below.

2.Connect the inlet accessories to the heater including the filter section (optional), the inlet elbow and the rain hood prior to standing the heater upright. Note the inlet skirt for the rain hood (optional) is installed from the outside of the building (page 20).

3.Install hanging rods to adequate ceiling and/or wall supports per the structural engineer’s recommendations and align with the hanging brackets on the heater. Refer to the hanging rod size shown on the table below. Locate the hanging rods so that the weep holes provided in the rain hood are located a minimum of 3” beyond the outside wall surface.

4.Remove the lag bolts used to fasten the unit to the skid. Rotate the hanging brackets for the vertical application and retighten the securing hardware.

5.Utilizing the lifting brackets on the front of the heater, use a forklift or comparable lifting device to raise and position the heater. Take precautions to prevent equipment damage (dents and/or scratches) when the heater is being lifted into position.

6.Use washers and double lock nuts to secure equipment on hanging rods.

IMPORTANT

The rain hood should be sloped slightly (1/8” off level). This allows any ingested moisture to drain out of the heater through weep holes located in the rain hood to the exterior of the building.

7.Apply shims at the bottom of the rain hood to take up slack in the opening, leaving a minimal joint between the top of the rain hood and the wall.

8.Install fiberglass insulation in the gaps around the wall opening and the rain hood. Apply enough material to accommodate the full thickness of the wall.

9.Install finish trim pieces (by others) to the top, sides and bottom of the rain hood on both the inside and outside wall surfaces.

11.Install the second downturn and directional elbows. Consult the job layout for the orientation of the elbows.

Model	Weight		Hanging Rods			Wall Opening*
Model	Weight	Qty.	Size	A	B	H	W
		Qty.	Size	A	B	H	W
S400/S800	650 lbs.	4	3/8” dia.	23 3/8”	27 7/8”	26”	25½”
S950/S1200/S1600	950 lbs.	4	3/8” dia.	26”	43 7/8”	29”	42¼”
S1850/S2200/S3200	1750 lbs.	4	1/2” dia.	34 7/8”	48 7/8”	38¾”	47¼”

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL VERTICAL INDOOR INSTALLATION

mWARNING:

The primary structural support element of a vertically mounted heater is the base. Any support to the heater cabinet should be considered secondary, only as a means to help stabilize the heater.

HANGING ROD DETAIL

SECOND DOWNTURN (OPTIONAL)

DOWNTURN

STRUCTURAL KNEE BRACE (BY OTHERS)

DOWNTURN

SECOND DOWNTURN

(OPTIONAL)

GAS TRAIN WIRING

(FIELD CONNECTED)

DIRECTIONAL

ELBOWS

GAS TRAIN

HANGING ROD (BY OTHERS)

UNIT

BASE OF HEATER

ELECTRICAL CONTROL

ENCLOSURE

FILTER SECTION (OPTIONAL)

INLET ELBOW

INTERIOR WALL TRIM

(BY OTHERS)

EXTERIOR WALL TRIM (BY OTHERS)

RAIN HOOD

HANGING BRACKET DETAIL

HANGING RODS, NUTS AND WASHERS BY OTHERS

SHIPPING POSITION

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

MOUNTING POSITION

HANGING ROD

NUT

WASHER

DOUBLE LOCK NUTS

SHIPPING POSITION

MOUNTING POSITION

L BRACKET	C BRACKET
FOR S400 - S800 UNITS	FOR S950 - S3200 UNITS

* Dimensions allow for 1” clearance on each side

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS VERTICAL OUTDOOR MOUNTING

mWARNING:

Due to the size and weight of this equipment, it is recommended the heater mounting structure be reviewed and approved by a qualified structural engineer before installing this equipment.

IMPORTANT

Before proceeding with the installation, verify the feasibility of the location selected with respect to accessibility to the equipment for service and maintenance functions.

mCAUTION

1.Prepare wall penetration to the dimensions below.

2.Connect the inlet accessories to the heater including the filter section (optional).

3.Install structural uprights and associated wall supports per structural engineers recommendations.

4.Remove the lag bolts used to fasten the unit to the skid.

6.Secure the heater in place with contractor supplied hardware.

7.Install the wall sleeve to the downturn.

8.Install fiberglass insulation in the gaps around the wall opening and the wall sleeve. Apply enough material to accommodate the full thickness of the wall.

9.Install finish trim pieces (by others) to the top, sides and bottom of the wall sleeve on both the inside and outside wall surfaces.

10.Apply silicone caulk at the joint between the wall sleeve and the outside wall surface. Make certain this is a continuous bead and that it runs the entire width of the wall sleeve. Caulk all other exposed joints.

11.Mount the gas train enclosure to the wall structure and connect gas piping between the heater and the enclosure.

12.Install the inlet skirt to the heater inlet and attach the skirt extension to the exterior wall (page 21).

13.Install wall sleeve, second downturn and directional elbows. Consult the job layout for the orientation of the elbows.

* Dimensions allow for 1½” clearance on each side

S-Series Technical Manual

Cambridge Air Solutions

TYPICAL VERTICAL OUTDOOR INSTALLATION

INTERIOR WALL FLASHING (BY OTHERS)

EXTERIOR WALL FLASHING (BY OTHERS)

DOWNTURN

UNIT

mWARNING:

The primary structural support element of a vertically mounted heater is the base. Any support to the heater cabinet should be considered secondary, only as a means to help stabilize the heater.

INLET SKIRT (FIELD ASSEMBLED)

MOUNTING DETAIL

DOWNTURN

WALL SLEEVE

SECOND DOWNTURN (OPTIONAL)

DIRECTIONAL ELBOWS

GAS TRAIN WIRING (FIELD CONNECTED)

GAS TRAIN ENCLOSURE GAS TRAIN

ELECTRICAL CONTROL ENCLOSURE

BASE OF HEATER

FILTER SECTION (OPTIONAL)

CHANNEL SUPPORT (BY OTHERS)

SECURE STRUCTURAL CHANNEL TO WALL (AS REQUIRED)

(BY OTHERS)

BUILDING WALL

BUILDING FOOTING

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES STRUCTURAL INLET ELBOW

Ceiling-Mounted

brackets (4 plcs)

Stand-Mounted

Floor-Mounted

	Retaining clip
		Structural
	Retaining clip	inlet elbow
	Retaining clip
	(downblast	Structural
		Structural
	Structural	inlet elbow
	Structural
Airﬂow	inlet elbow
Airﬂow

The vertical S-Series structural inlet elbow is suitable for indoor or outdoor use. The elbow has been structurally reinforced to support the weight of the unit and any additional accessories applicable to your installation. It can be used in floor-mounted applications, with or without a stand, as well as ceiling-mounted applications when hanging the unit with threaded rod. The elbow is insulated to prevent condensation and reduce noise levels.

Model	Weight	A	B	C
S400/S800	150 lbs.	27 1/2”	25 3/8”	25 3/8”
S400/S800	150 lbs.	27 1/2”	25 3/8”	25 3/8”
S950/S1200/S1600	205 lbs.	30 3/4”	28”	42”
S1850/S2200/S3200	300 lbs.	40 3/8”	37 3/8”	47 1/8”

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES STRUCTURAL INLET ELBOW

CEILING-MOUNTED APPLICATIONS

1.Remove the accessory mounting brackets from the top of the inlet elbow and reattach them on the bottom of the inlet elbow for hanging.

6.Secure threaded rod to ceiling structure as needed.

7.Double-nut the end of the rod below the mounting bracket at the bottom of the inlet elbow.

Accessory

bracket

2.If heater is vertical downblast, remove the retaining clip and attach to the opposite flange. .

3.Use the included heater mounting brackets to attach the inlet elbow to the heater (or filter section if applicable).

•If filter section is included, attach heater to filter sec-tion using provided accessory mounting brackets after inlet elbow and filter section are connected.

Heater

bracket

Bolts

Lock washers

Structural inlet elbow

4.If not already attached, secure elbow to discharge of heater using provided heater mounting brackets.

5.Position heater with attached accessories upright and lift into place.

8.It is recommended to run support back to the wall to prevent swaying or tipping of heater and accessories.

•Use the provided holes in the mounting brackets to run threaded rod (by others) to support on walls (by others).

Ø 5/8” holes for wall support

9.For indoor installations, attach thru-wall rain hood and inlet skirt if applicable.

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES STRUCTURAL INLET ELBOW

STAND-MOUNTED APPLICATIONS

1.Once the stand is set, attach inlet elbow to stand using the provided accessory mounting brackets.

Structural inlet elbow

Accessory

bracket

Adjustable stand

Bolt

Lock washer

2.If filter section included, attach filter section to inlet elbow using the provided accessory mounting brackets. If filter section is not included, skip to step 3.

3.Attach heater to inlet elbow (or filter section) below using the provided heater mounting brackets.

Heater

bracket

Bolts

Lock washers

Structural inlet elbow

5.It is recommended to run support back to the wall to prevent swaying or tipping of heater and accessories.

•Use the provided holes in the mounting brackets to run threaded rod (by others) to support on walls (by others).

Ø 5/8” holes for wall support

6.For indoor installations, attach thru-wall rain hood and inlet skirt if applicable.

4.Continue attaching discharge accessories with provided mounting brackets as needed.

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES STRUCTURAL INLET ELBOW

FLOOR-MOUNTED APPLICATIONS

1.Remove the mounting brackets from the top of the inlet elbow and reattach them on the bottom of the inlet elbow for anchoring to the floor.

9.Continue attaching discharge accessories to heater as needed using the provided mounting brackets.

Heater

bracket

Bolts

Lock washers

Structural inlet elbow

2.Determine the distance needed between the building wall and the heater.

3.Place inlet elbow where desired and mark anchor locations using holes in the attached mounting brackets.

4.Install wedge anchors, minimum 0.5”x6” (not provided), as recommended by manufacturer into concrete floor where marked.

5.Set inlet elbow over anchors.

6.Make sure inlet elbow is level using shims (by others) if necessary.

7.Once level, secure elbow to anchors with washer and lock nut (not provided).

8.Attach heater (or filter section if applicable) to inlet elbow using the provided mounting brackets.

bracket Anchor lock nut

Washer

Installed anchor

10.It is recommended to run support back to the wall to prevent swaying or tipping of heater and accessories.

•Use the provided holes in the mounting brackets to run threaded rod (by others) to support on walls (by others).

11.For indoor installations, attach thru-wall rain hood and inlet skirt if applicable.

Ø 5/8” holes for wall support

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES NON-ADJUSTABLE ELBOW

brackets (Qty 2)

Retaining clip

Non-adjustable elbows

Airﬂow

ment plates

The non-adjustable elbow is suitable for discharge ductwork to turn air 90° for either indoor or outdoor S-Series installations. It attaches to the discharge end of a vertical heater or vertical duct extensions with 4 accessory mounting brackets (shipped with the heater or vertical duct extension) that can either be suspended via threaded hanging rod or secured horizontal to the wall in stand mounted applications. The discharge end of the elbow attaches easily to wall sleeves or downturns with lugs. directional elbows with a discharge collar can also be attached directly to the non-adjustable elbow if desired. Non-adjustable elbows are insulated to help mitigate noise and thermal losses.

Model	Weight	A	B	C
S400/S800	45 lbs.	13”	25 3/8”	25 3/8”
S400/S800	45 lbs.	13”	25 3/8”	25 3/8”
S950/S1200/S1600	75 lbs.	15”	28”	42”
S1850/S2200/S3200	130 lbs.	24 5/8”	37 1/2”	47”

A	Airﬂow

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES NON-ADJUSTABLE ELBOW

1.Prepare the non-adjustable elbow for assembly by re moving the bolts and washers from the sides. For ceiling mounted applications please refer to the

installation instructions for the structural inlet elbows.

2.Prepare the upstream accessory or heater by removing the accessory mounting brackets.

3.Lift the non-adjustable elbow into place and secure it using the bolts and washers removed in the previous step.

Non-adjustable elbow

Accessory

bracket

Heater

4.If not already done, remove the side attachment plates from the discharge end of the non-adjustable elbow. If attaching a discharge collar with directional elbows, also remove the retaining clip.

Retaining clip

Non-adjustable elbow

ment plates

5a. If attaching a wall sleeve or a downturn with lugs, secure it using both the retaining clip and side attachment plates. Follow additional installation steps detailed in the appropriate accessory installation instructions.

Non-adjustable elbow

Wall sleeve

ment plates

5b. If attaching a discharge collar and directional elbows replace the screws removed in step 4. Attach the dis-charge collar to the discharge face of the nonadjustable elbow and secure using self-tapping screws. Arrange the directional elbows in the desired configu-ration before securing them to the discharge collar.

Non-adjustable elbow

Discharge collar

6.Seal all seams between heater and accessories using appropriate contractor grade caulk to mitigate potential water ingestion and pressure loss.

Heater

Cambridge Air Solutions

S-Series Technical Manual

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES ADJUSTABLE STAND

Inlet screen

48”-54”	Height adjustment
	label (2/leg)

	(4 plcs)	Adjustable
	(4 plcs)	stand
		stand

The Vertical S-Series Adjustable Stand is suitable for use in the up blast configuration in both indoor and outdoor locations. The 48” height is low enough so the control can may still be accessible without lifts or ladders, but high enough to avoid snow ingestion from the ground during winter months. The stand features 6” of adjustment (up to 54”) and is suitable for applica-tions when you prefer the heater to be easily accessible for service, yet floor space or slab size may come at a premium.

1. Determine distance needed between building wall and

heater (12” recommended).

Parts List

• Outer edge of template matches footprint of vertical

unit and stand w/ centerline of heater indicated.

Item

Description

Qty.

Template Detail

Adjustable stand (assembled)

Template

Leveling shims

Centerline

Anchor center

Stand

Heater/Stand

Anchor

Sonotube

Weight

Footprint

Locations (o)

Locations (+)

Size

Sonotube center

S400/

176 lbs.

25 1/2”

16 3/4”

19 7/8”

S800

S950/

S1200/

196 lbs.

28”

42”

19 1/2”

33 1/2”

36 1/2”

22 1/2”

S1600

S1850/

S2200/

222 lbs.

37 1/2”

47”

28 7/8”

38 1/2”

41 5/8”

32”

S3200

S-Series Technical Manual

Cambridge Air Solutions

INSTALLATION INSTRUCTIONS

VERTICAL S-SERIES ADJUSTABLE STAND

2.Use provided template to mark anchor locations on existing concrete slab. Consult structural engineer as to adequacy of existing slab for structural support.

•If no slab available, installation of sonotubes with housekeeping pad is recommended. Use template to mark center locations of sono-tubes (indicated with ”+” cutout).

•Install sonotubes as recommended by struc-tural engineer and use template to mark an-chor locations (indicated with ”o” hole) on sonotubes.

	Anchor-	Template
		Template
	holes	Centerline
	holes	Sonotube-
		Sonotube-
		cutouts
	Drilled holes for	Concrete slab
	anchors	Concrete slab
	anchors

3.Once concrete/sonotubes are marked, remove and discard template.

4.Drill holes for anchors.

5.Set stand over anchor locations.

6.Install outdoor rated wedge anchors, minimum 0.5”x6” (not provided), as recommended by manufacturer into concrete slab/sonotubes where marked.

7.Make sure stand is both level and square.

•If shimming necessary, insert provided shims where needed to level the stand.

•Once level and square, secure base to anchors with washer and lock nut (not provided).

•Shims are NOT intended to be used for ad-justing the overall stand height. See next step.

Anchor lock nut

Stand leg

Washer

Stand shim

8.Determine if default stand height (48”) is correct for heater installation.

•If adjustment needed, remove height adjust-ment bolts (2/leg), and raise stand necessary amount using the height label as a guide.

•Reattach height adjustment bolts.

	Nut
Washer	Lock washer
Washer
Height	Height label
adjustment
bolt (2/leg)

Cambridge Air Solutions

S-Series Technical Manual

+ 86 hidden pages