Cambridge Air Solutions S Series 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.
®
90.1
ASHRAE
ASHRAE
COMPLIANT
COMPLIANT
Made in the USA ®
S-TM8-0120

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.
S-SERIES
BLOW-THRU®SPACE HEATER
TECHNICAL MANUAL
Copyright © 2020
Cambridge Air Solutions
All Rights Reserved
Cambridge Air Solutions
760 Long Road Crossing Dr.
Chesterfield, MO. 63005
Phone: [phone]
Fax: [phone]
www.cambridgeair.com

CONTENTS
Hazard Summary ................................................2
Typical System Overview ...................................3
 AccessoryIdentication.............................3
Heater Operation........................................5
 HeaterConguration..................................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

Cambridge Air Solutions 2 S-Series Technical Manual
HAZARD SUMMARY
Hazard Identification
Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully.
mWARNING: Indicates a potentially hazardous situation which could result in
death or serious injury.
mCAUTION: Indicates a potentially hazardous situation which may result in
minor or moderate injury. It may also be used to alert against
unsafe practices.
CAUTION: 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 make-
up 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.

S-Series Technical Manual 3 Cambridge Air Solutions
TYPICAL SYSTEM OVERVIEW
ACCESSORY IDENTIFICATION
Roof Top Mounting
RH-RT
MDD
DT
UNIT
M
C
MR
AMS
DD
DE
Indoor Vertical Mounting
DT
DE
DT
IE
RH-TW
ISR
UNIT
Thru Wall Mounting
MDD
RH-TW
ISR
DT
DE
UNITFS
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
Component Identification
RH-RT MDD
UNIT
MR
AMS
DE
DT
WALL SLEEVE
(BY OTHERS)
Roof Top / Thru Wall Mounting
Under Roof Mounting
IE UNIT
DE
DT
MDD
IP
MC
ID
Outdoor Vertical Mounting
ISU
DE
DT
WALL SLEEVE
(BY OTHERS)
DT
UNIT
MDD

Cambridge Air Solutions 4 S-Series Technical Manual
TYPICAL SYSTEM OVERVIEW
ACCESSORY IDENTIFICATION
FILTER
SECTION
RAINHOOD
UPTURN
HORIZONTAL
MOUNTING
STAND
FILTER
SECTION
SUPPORT
DUCT
EXTENSION
DUCT
EXTENSION
ADJUSTABLE
ELBOW
WALL
SLEEVE
DIRECTIONAL
ELBOWS
DOWNTURN
DOWNTURN
DOWNTURN
DIRECTIONAL
ELBOWS
STRUCTURAL
INLET
ELBOW
RAINHOOD
RAINHOOD
EXTENSION
ADJUSTABLE
STAND
DUCT
EXTENSION
STRUCTURAL
FILTER
SECTION
DOWNTURN
DOWNTURN
DIRECTIONAL
ELBOWS
ADJUSTABLE
STAND
WALL
SLEEVE

S-Series Technical Manual 5 Cambridge Air Solutions
HEATER CONFIGURATION
PORT FOR MEASURING
MANIFOLD PRESSURE
MODULATING GAS VALVE
SAFETY SHUT-OFF VALVE
HIGH LIMIT
LEAK TEST PORT
DISCHARGE TEMPERATURE SENSOR
DISCHARGE AIR TEMPERATURE
DAMPER BLADES
DAMPER MOTOR
ELECTRICAL
CONTROL ENCLOSURE
SHUT-OFF VALVE
SAMPLING BOX
HINGED ACCESS DOOR
REGULATOR
MANUAL SHUT-OFF VALVEBURNER VIEWPORT
BURNER ASSEMBLY
IGNITER & FLAMEROD
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.
TYPICAL SYSTEM OVERVIEW
HEATER OPERATION

Cambridge Air Solutions 6 S-Series Technical Manual
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”.
INSTALLATION INSTRUCTIONS
UNCRATING INSTRUCTIONS

S-Series Technical Manual 7 Cambridge Air Solutions
INSTALLATION INSTRUCTIONS
ROOF TOP MOUNTING - CURB / STAND / RAIL
MOUNTING STAND
MOUNTING RAIL
DOWNTURN / CURB
WITH FLASHING
ROOF INSULATION
2 X 6 TREATED LUMBER B
A
C
24"
TYP.
REF.
24"
4
5
3
2
1
CURB SECTION
INSULATION
2.5"1 5/8"
2 x 2 WOOD NAILER
(PROVIDED)
FLASHING
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”
STAND DETAIL NOTES
1
TREATED TIMBER AS REQUIRED UNDER MOUNTING
CURB, RAIL AND STAND TO SECURE AND LEVEL UNIT.
2
SECURE MOUNTING STAND TO TIMBER WITH WOOD LAG
SCREWS AS SHOWN.
3
SECOND MOUNTING ASSEMBLY IS REQUIRED ONLY ON
UNITS WITH FILTER SECTIONS.
4
MOUNTING STAND CONSTRUCTION:
12 GA. GALVANIZED STEEL
5
MOUNTING RAIL CONSTRUCTION:
18 GA. GALVANIZED STEEL
6
REMOVE HANGER BRACKET AND REPLACE SCREWS
7
ADJUSTABLE ± 3¾”
6
(BY OTHERS)
2 x 6 TREATED LUMBER
710½"

Cambridge Air Solutions 8 S-Series Technical Manual
INSTALLATION INSTRUCTIONS
ROOF TOP / THRU WALL MOUNTING - STAND / RAIL
Model A B C
S400/S800 57 7/8” 33¼” 25 3/8”
S950/S1200/S1600 69 7/8” 33¼” 42”
S1850/S2200/S3200 75¾” 36¾ ” 47 1/8”
UNDER ROOF MOUNTING - CURB
MOUNTING STAND
MOUNTING RAIL
ROOF INSULATION
2 X 6 TREATED LUMBER B
A
C
24"
TYP.
4
5
3
2
1
STAND DETAIL NOTES
1
TREATED TIMBER AS REQUIRED UNDER MOUNTING RAIL
AND STAND TO SECURE AND LEVEL UNIT.
2
SECURE MOUNTING STAND TO TIMBER WITH WOOD LAG
SCREWS AS SHOWN.
3
THIRD MOUNTING ASSEMBLY IS REQUIRED ONLY ON
UNITS WITH FILTER SECTIONS.
4
MOUNTING STAND CONSTRUCTION:
12 GA. GALVANIZED STEEL
5
MOUNTING RAIL CONSTRUCTION:
18 GA. GALVANIZED STEEL
6
REMOVE HANGER BRACKET AND REPLACE SCREWS
7
STAND IS ADJUSTABLE ±3¾”
CURB
ROOF INSULATION
REF.
24"
CURB SECTION
INSULATION
2.5" 1 5/8"
2 x 2 WOOD NAILER
(PROVIDED)
6
(BY OTHERS)
2 x 6 TREATED LUMBER
710½"