Frost Fighter IHS700P LP Datasheet

FROST FIGHTER INC.
100-1500 NOTRE DAME
WINNIPEG, MANITOBA
CANADA R3P 0E9
TEL : [phone]
FAX: [phone]
TOLL FREE: [phone]
WWW.FROST-FIGHTER.COM
GAS - FIRED CONSTRUCTION HEATER
MODEL
IHS700P (LP/NG)
(WITH PLC CONTROL)
Installation - Operation
Maintenance Instructions
and Parts List
READ INSTRUCTIONS PRIOR TO STARTING HEATERS
FROSTFROST
REV. 1.0.5
JAN 2020 TO PRESENT

FROSTFIGHTER WARRANTY
Frost Fighter Inc. warrants the Frostfighter heater to be free from defects in
workmanship and materials for a period of twelve (12) months from date of initial
service not to exceed fifteen (15) months from date of shipment.
If during the warranty period, the heat exchanger fails under normal use and service
due to a defect in material or workmanship said heat exchanger will be repaired or
replacedfree of charge F.O.B. the Winnipeg Factory..
All mechanical and electrical components are covered by a one (1) year limited
warranty. Normal maintenance items are excluded under the warranty. The
warranty does NOT include any freight, labor or sales taxes incurred by the
purchaser and is subject to the following conditions:
1. The heater shall be operated in accordance with the manufacturer’s
operating and maintenance manual.
2. The heater shall be subject to normal use in service and shall not have
been misused, neglected, altered or other wise damaged.
3. The unit shall be operated within the rated capacities and with the
prescribed fuel.
4. The unit has not been allowed to exceed its proper temperature limits due
to control malfunction or inadequate air circulation.
5. There is no evidence that the unit has been subject to tampering or
deliberate destruction.
No representative of ., nor any of its distributors or dealers, isFrost Fighter Inc
authorized to assume for . any other obligations or liability inFrost fighter Inc
connection with this product, not alter the terms of the warranty in any way. This
warranty is limited to the express provisions contained herein and does not extend to
liability for labor costs incurred in replacing defective parts.
Parts can be obtained from ., Winnipeg, Manitoba on the basis thatFrost Fighter Inc
credit will be issued if the defective parts returned qualify for replacement pursuant to
the terms and conditions of this warranty. Authorization to return any alleged
defective parts must be first obtained from the factory prior to transporting the part.
The transportation charges for the alleged defective part must be prepaid by the
owner. . will not accept charges for parts purchased unless theFrost Fighter Inc
conditions of this warranty have been satisfied and prior authorization to purchase
the parts has been received from the factory.
100-1500 NOTRE DAME , WINNIPEG, MANITOBA
R3P 0E9, [phone], 1-888-792-0374

TABLE OF CONTENTS
•Page 2
•Page 3
•Page 4 to 6
•Page 7 & 8
•Page 9
•Page 10
•Page 11
•Page 12
•Page 13
•Page 14 to 16
•Page 17
•Page 18 & 19
•Page 20 to 23
•Page 24 & 25
•Page 26
•Page 27
•Page 28
•Page 29
•Page 30 & 31
•Page 32
–Hazard Definitions & Safety
–Specifications
–Pre-Installation Checklist, Installation, Gas Connections & Ducting
–Venting
–Electrical Supply
–Main Control Panel
–Optional High Intensity LEDBeacon
–High Limit Switches
–Preparation for Start Up
–Maintenance & Service
–Normal Sequence of Operation
–Typical Sequence of Operation / Display Screens & Meanings
–Troubleshooting Guide
–Configuring the VFD Display (ATV320 and ATV312)
–Electrode and Flame Probe Adjustments
–Burner Replacement Parts
–Manifolds
–View of Components in Main Control Box
–Wiring Diagrams
–Dimensions
1

2
HAZARD DEFINITIONS
GENERAL HAZARD WARNING
FAILURE TO COMPLY WITH PRECAUTIONSAND INSTRUCTIONS PROVIDED WITH
THIS HEATER CAN RESULT IN DEATH, SERIOUS BODILY INJURYAND PROPERTY
LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION,
CARBON MONOXIDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS
SHOULD USE OR SERVICE THIS HEATING UNIT.
IF YOU REQUIREASSISTANCE OR HEATER INFORMATION SUCH AS AN
INSTRUCTION MANUAL, LABELS, ETC., CONTACT THE MANUFACTURER.
WARNING
FIRE, BURN INHALATION, AND EXPLOSION HAZARD. KEEP SOLID COMBUSTIBLES,
SUCH AS BUILDING MATERIAL, PAPER AND/OR CARDBOARD A SAFE DISTANCE
AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS. NEVER
USE THE HEATER IN SPACES WHICH MAY CONTAIN VOLATILE OR AIRBORNE
COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT
THINNER, ACETONE, DUST PARTICLES AND/OR UNKNOWN CHEMICALS.
THIS PRODUCT IS NOT INTENDED FOR HOME OR RECREATIONAL VEHICLE USE.
FOR YOUR SAFETY
DO NOT USE THIS HEATER IN A SPACE WHERE GASOLINE OR OTHER LIQUIDS
HAVING FLAMMABLE VAPOURS ARE STORED OR USED.
GENERAL NOTES:
STANDARD: ANSI Z83.7 - CSA 2.14
ALL GAS INSPECTION AUTHORITIES IN CANADA REQUIRE THAT THE
INSTALLATION AND MAINTENANCE OF HEATER AND ACCESSORIES
SHALL BE ACCOMPLISHED BYA QUALIFIED GAS FITTER.
THE INTENDED USE OF THIS HEATER IS FOR THE TEMPORARY HEATING
OF BUILDINGS OR STRUCTURES UNDER CONSTRUCTION, ALTERATION
OR REPAIR.
INSTALLERS RESPONSIBILITY
Installer please note: This equipment has been test fired and inspected. It has been
shipped free from defects from our factory. However, during shipment and installation,
problems such as loose wires, leaks or loose fasteners may occur. It is the installer’s
responsibility to inspect and correct any problems that may be found.
OWNERS RESPONSIBILTY
WARNING Installation and adjustment of the burner requires technical knowledge and
the use of combustion test instruments. Do not tamper with the unit or controls. Call your
qualified service technician. Incorrect operation of the burner could result in severe
personal injury, death or substantial property damage.
Have your equipment inspected and adjusted annually by your qualified service technician
to assure continued proper operation.
Never store gasoline or combustible materials near the heating equipment. This could
result in explosion or fire, causing severe personal injury, death or substantial property
damage.

MODEL IHS-700P LP/NG
FUEL TYPES NATURAL GAS OR PROPANE
MANIFOLD
GAS PRESSURE
3.7" W.C. NATURAL GAS
2.8" W.C. PROPANE
NORMAL
AIR SETTING 6
APPROVAL
AGENCY
SPECIFICATIONS
WARNING Read all the instructions before proceeding. Follow all instructions completely.
failure to follow these instructions could result in equipment malfunction, causing severe
personal injury, death or substantial property damage.
This equipment must be installed, adjusted and started only by a qualified service technician
–an Individual or agency, licensed and experienced with all the codes and ordinances, who
is responsible for the installation and adjustment of the equipment. The installation must
comply with all local codes and ordinances.
NOTICE Concealed damage –If you discover damage to the burner or the controls
during Unpacking, notify the carrier at once and file the appropriate claim.
NOTICE High altitude installations –Accepted industry practice requires no derate of
Burner capacity up to 2000 feet above sea level. For altitudes higher than
2000 Feet, derate burner capacity 4% for each 1000 feet above sea level.
To the owner-
3
This heater is not intended to be used at temperatures above 60°F (15°C). Use of this heater
at above this temperature may result in the burner locking out on the high limit switch.
7" W.C. MIN. - 14" W.C. MAX.
10" W.C. MIN. - 14" W.C. MAX.
SUPPLY PRESSURES
NATURAL GAS
PROPANE
IHS-700P LP/NG FUEL CONSUMPTION
FUEL TYPE
NATURAL GAS
272 cu.ft. per hour
8.1 US GPH
32.2 lbs. per hour
PROPANE
667 cu.ft. per hour
680 Therms per hour

PRE-INSTALLATION CHECKLIST
LEVELING THE HEATER
- Ensure the surface the heater is to be placed on does not slope more than 5 degrees in any direction.
- If the surface slopes more than 5 degrees either level the surface or place supports under the heater
base frame to ensure the heater is level.
COMBUSTION AIR SUPPLY
The burner requires combustion air and ventilation air for reliable operation. Assure that the
Building and/or combustion air openings comply with National Fuel Gas Code NFPA 54/CSA B149. For
appliance/burner units in confined spaces, the room must have an air opening near the top of the room
plus one near the floor, each with a free area at least one square inch per 1000 Btu/hr input of all fuel
burning equipment in the room. For other conditions, refer to NFPA 31 (CSA B1139-M91 in Canada).
If there is a risk of the space being under negative pressure or of exhaust fans or other devices depleting
available air for combustion and ventilation, the appliance/burner should be installed in an isolated room
provided with outside combustion air.
CLEARANCES
The unit must be installed with minimum clearances of 6 inches on the sides, 18 inches from the top of
the unit, 18 inches from the flue (venting), and 36 inches from the burner access side. The unit must be
installed on a level floor.
DUCT INSTALLATION
GENERAL NOTES:
1. The heater is designed and approved for use as a construction heater underANSI Z83.7
CSA 2.14.
2. Frost fighter Inc cannot anticipate every use, which may be made of our heaters. CHECK WITH YOUR
LOCAL FIRE AND SAFETY AUTHORITY IF YOU HAVE QUESTIONS ABOUT SAFE APPLICATIONS.
3. Other standards govern the use of fuel gases and heat producing products in specific applications.
Your local authority can advise you about this issue.
4. Please retain this instruction manual for future reference.
5. The primary application of this heater is for temporary heating of construction sites and/or applications
of this type.
6. Check Rating Plate on heater for set up specifications.
7. For information about replacement parts call toll free 1-888-792-0374
ELECTRICAL NOTES:
All electrical connections and grounding shall be in compliance with the National Electrical Code,
ANSI/NFPA70 and/or the Canadian Electrical Code (CSA Standard C22.1).
ADDITIONAL INSTRUCTIONS FOR PROPANE GAS:
1. The installation must conform with local codes or in the absence of local codes with the Standard for
the Storage and Handling of Liquified petroleum Gases, ANSI/NFPA 58 and/or the National Standards of
Canada CAN/CGA B149.2 installation codes for propane gas.
2. The heater must be located more than ten (10) feet (3.05 meters) away from the propane source or
propane tank.
3. When the heater is not in use insure to shut off the gas supply from the propane source or propane
tank.
4. Disconnect the heater from the propane source or propane tank when storing the heater indoors.
5. Minimum tank size 400 lbs (360 litres)
6. Connect the tank to the unit using appropriately sized regulators to reduce the tank pressure to 11" w.c.
7. The heater must not discharge toward any propane gas container within 20 feet (6m).
4

CONNECTING THE PROPANE TANK
1. The gas connection on the heater is 1” NPT. Ensure you have the proper fittings to connect to the heater.
2. The maximum supply pressure to the heater is 14” W.C. (1/2 PISG).
3. Ensure the proper regulators are installed to reduce the tank pressure to 14”W.C. maximum, 10" minimum.
4. Perform gas leakage test. Close the main valve on the heater and open all manual valves upstream of the
heater. Check all connections for leaks with soap solution. Formation of bubbles indicates gas leakage.
Retighten and seal all connections or replace connectors if warranted.
DISCONNECTING THE PROPANE TANKS
1. Close all fuel valve upstream of the heater including the valve at the tank.
2. Disconnect the fuel lines at the heater and the tank.
ADJUSTING THE INPUT RATE FOR NATURAL GAS AND PROPANE
Picture 1 shows the location of the manifold test port. To adjust the manifold pressure connect a pressure
gauge (0-20” W.C.) to the test port and bring the heater to fire. Adjust the gas pressure at the regulator
(See Picture 2) so the gauge reads the pressure recorded on the rating plate.
5
Picture 1
Picture 2
Test Port
RV-81 Regulator

6
INSTALLATION INSTRUCTIONS:
1. The installation shall conform with local codes, or, in the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, or the National Gas and Propane Installation Code, CSA B149.1.
2. Inspect the heater before each use and have it annually inspected by a qualified agency.
3. The hose assembly shall be visually inspected prior to each use of the heater. If it is evident there is
excessive abrasion or wear, or the hose is cut, it must be replaced prior to the heater being put into
operation. The replacement hose assembly shall be specified by the manufacturer. The hose assembly
shall be protected from traffic, building materials and contact with hot surfaces both during use and
while in storage.
4. When firing the unit in an enclosed area, five square feet (0.47 square meters) must be provided to
allow free entry of the air required for operation.
5. Do not operate the unit in partly ventilated areas without a flue pipe connected to the unit.
6. Do not operate the unit in close proximity to combustible surfaces, materials, gasoline, and other
flammable vapours and liquids.
7. After installation, check the manifold assembly for gas leaks by applying a water and soap solution to
each connection.
8. The heater must be installed on level ground.
9. Minimum gas supply pressure is 7" . .W C (natural gas) or 10” W.C. (propane). Maximum gas supply
pressure is 14" W C. . (1/2 PSIG)
GAS LEAKAGE TESTING
After removal for service or replacing components on the gas manifold a gas leakage test must
be performed.
1. Close main gas firing valve on the gas manifold.
2. Connect your source gas to the gas manifold.
3. Once connections are tightened, open source gas, fire unit.
4. On each connection and fitting, apply soap solution and check for bubbles. This will indicate a
gas leak if bubbles continue to form.
5. Fix any leaks that are found by applying pipe dope to the leaking fitting or connection and re-
tighten. Check for leaks once repairs, if any, are made.
6. Open main gas firing valve and start the unit.
7. Once the unit is operating and burner is running, redo the soap test to insure gas fittings are tight.
8. Fix any leaks found.
HIGH LIMITS
- The heater is supplied with manual reset high limits located behind marked panels on the left
side of the heater - SEE PAGE 12.
- The high limit contacts are normally closed and open on the high limit temperature condition.
- If a high limit trips allow the heater to cool down and reset. Reset the manual high limit by
manually depressing the reset button located in the center of the high limit.
-Duct diameter is 16 inches
-Use belt cuff ducting. Slide the cuff overtop of the duct inlet/outlet and tighten with the belt.
-The top two connections are the heated supply air into the building.
-The bottom two duct connections are for cold air or return air into the heater.
-The heater is approved use with or without ducting.
-Maximum duct length is 100 feet per supply opening. If return air ducting is used the length of the
return air duct must be subtracted from the allowable supply ducting length (i.e. if the return air
duct length is 30 feet the maximum supply duct length is reduced to 70 feet).
-Ducts should be rated for 300°F minimum.
DUCTING:

7
VENT SYSTEM
The flue gas venting system must be in good condition and must comply with all the applicable codes.
The IHS 700 is a category III appliance.
OUTDOOR INSTALLATIONS:
For outdoor installation a vent cap must be installed and fastened.
INDOOR INSTALLATIONS:
Must be done in accordance to NFPA 54 (or CSA B149) with local authorities having jurisdictions.
1. The flue must be securely attached to the unit with tight joints.
2. The flue must not be sized to have a cross-sectional area less then that of the flue
collar at the unit.
3. Other appliances must not be connected so as to vent through the vent of this unit.
4. Do not use 90-degree tees or elbows greater than 45 degrees, (UNLESS NOTED).
5. Do not support the weight of the stack on the flue connection of the heating system.
6. The maximum flue gas temperature is 650 F. “A”vent, or single wall steel pipe must
be used.
7. Minimize connecting pipe length and the number of bends by locating the unit as close
to the flue pipe as possible.
8. Maintain clearances between the flue pipe and combustible materials that are
acceptable to the Federal, Provincial and local authorities having jurisdiction.
9. Unit must be connected to a flue having sufficient draft to ensure proper operation of
unit.
VERTICALLY VENTED UNITS
1. Maximize the height of the vertical run of
vent pipe. A minimum of three (3) feet
(1m) of vertical pipe is required. The top
of the vent must extend at least two (2)
feet (0.61m) above highest point on the
roof. A weatherproof vent cap must be
installed to the vent termination.
2. Horizontal runs must not exceed 75% of
the vertical height of the vent pipe, up to a
maximum of ten (10) feet (3m). Horizontal
runs should be pitched upward ¼” per foot
(21 mm) and should be supported at 3 foot
(1m) maximum intervals.
3. Design vent pipe to minimize the use of
elbows. Each 90 is equivalent to 5 feet
(1.5m) of straight vent pipe run.
4. Vent pipe should not be run through
unheated spaces. If such runs cannot be
avoided, insulate vent pipe to prevent
condensation inside vent pipe. Insulation
should be a minimum of ½” (12.7mm) thick
foil faced fibreglass, minimum 1 ½#
density.
5. Dampers must not be used in vent piping
runs. Spillage of flue gases into the
occupied space could result.
6. Vent pressure must be negative.
7. The vent must be terminated vertically.

8
HORIZONTALLY VENTED UNITS
.
Pressures in Category 111 venting systems are positive and therefore care must be taken to avoid flue
products from entering the heated space. Use only vent material and components that are UL listed and
approved for Category 111.
WARNING: Do not use Type B vent within a building on horizontally vented units.
1. All vent pipe joints must be sealed to prevent leakage into the heated space.
2. An approved vent cap must be used.
Rise ratio
1/4" per foot
Vent Diameter: 8"
Material: Single wall steel pipe or type A vent
Vent installations shall conform with local codes, or,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the National
Gas and Propane installation Code, CSA B149.1
90 Degree elbow
90 Degree elbow
Straight section
3' Minimum
25' Maximum
IHS 700
HORIZONTAL FLUE VENTING
3' Minimum

-Verify that the power supply & connections available are correct for the unit. All power supplies MUST be grounded.
-All power must be supplied through the POWER SUPPLY RECEPTACLES and through the POWER SELECTOR /
DISCONNECT SWITCH
-The selector / disconnect switch has three positions OFF / 1 PHASE / 3 PHASE. This selects between which power
supply receptacle will be supplying power to the unit. Regardless of which type of power is being supplied, the VFD
in the heater will always ensure correct fan rotation direction and reduce the power inrush by starting the fan motor
slowly.
INSTALLING THE OPTIONAL THERMOSTAT
Plug the thermostat directly into the marked receptacle . The thermostat will control the burner through the PLC
when the System Switch is in the THERMOSTAT position. The thermostat must be a line voltage type rated for
120VAC minimum and 10 AMPS.
THE REMOTE THERMOSTAT RECEPTACLE IS USED FOR INSTALLING THE THERMOSTAT ONLY!
THIS IS NOT AN EXTRA POWER SOURCE.
ELECTRICAL SUPPLY
9
WARNING
208V/230V
3 PHASE
208V/230V
1 PHASE
POWER
SUPPLY
RECEPTACLES
POWER
SELECTOR/
DISCONNECT
SWITCH
REMOTE
THERMOSTAT
CONNECTION
208V/230V 1PH/3PH MODELS
480V/600V 3PH ONLY MODELS
POWER
DISCONNECT
SWITCH
REMOTE
THERMOSTAT
CONNECTION
POWER SUPPLY
RECEPTACLE

SYSTEM
SWITCH BLOWER
SWITCH
POWER IN
SELECTOR
SWITCH
COMPARTMENT
LIGHT
SYSTEM SWITCH
MANUAL
OFF
THERMOSTAT
BLOWER SWITCH
ON
AUTO
POWER IN SELECTOR
208V
230V
Turns on heating system (burner) to operate continuously
Heat system (burner) isoff. Blower may continue to operate incool-down sequence
Heating system (burner) is controlled byremote thermostat connected
Main blower operates continuously (Ventilation Mode)
Main blower operates based on the heating cycles controlled by the PLC
Supplies optimum control voltage when incoming line voltage is 195VAC – 215VAC
Supplies optimum control voltage when incoming line voltage is 220VAC – 240VAC
CONVENIENCE LIGHT
MOMENTARY PUSHBUTTON Controls compartment convenience lighting
TO ACTIVATE LIGHTING:
-Push once
-Push and hold for 5 seconds
-Push once when light is on
Lightingprovided with 5 min. automatic shut offdelay
Lighting provided with 30 min. automatic shut offdelay
Turns lighting off atany time before delay has expired
10
MAIN CONTROL PANEL

OPTIONAL HIGH INTENSITY LED STATUS BEACON
BEACON CONNECTOR PROVIDED AT
TOP OF CONTROL PANEL
OPTIONAL BEACON
CONNECTED TO UNIT
OPTIONAL BEACON
-Displays SOLID AMBER when desired power is connected & power selector/disconnect switch is in 1PH or 3PH position.
-Displays FLASHING GREEN on a call for heat (Manual or Thermostat) during pre-purge when burner begins operating.
-Displays SOLID GREEN when burner is firing. (Fuel valve signal applied).
-Displays FLASHING AMBER (1 second ON & 1 second OFF) during cool-down cycle.
-Displays FLASHING AMBER (2 second ON & 2 seconds OFF) in ventilation mode.
-Displays FLASHING RED (after 75 sec.) if burner goes into Lockout or (immediately) when High Limit Alarm is triggered.
Note: Versions prior to December 2018 may have FLASHING AMBER on call for heat during pre-purge in lieu of FLASHING GREEN.
Magnetic mounting version shown
-Available with quick mount magnetic base or can be permanently mounted
-UL ((US/CAN) Approved - IP65 weatherproof / RoHS Compliant
-Beacon can be added to heater at any time using connector on control box
LED STATUS BEACON DISPLAY:
The flash rate of RED ALARM alert can be
changed if desired from 80 flashes/min to 240
flashes/min with the switch under beacon's
screw on lens.
FLASH RATE
SELECTOR
SWITCH
11

HIGH LIMIT SWITCHES & LOCATIONS
LIMIT SWITCHES UNDER
REMOVABLE COVER
LIMIT SWITCH UNDER
REMOVABLE COVER
MANUAL RESET HIGH LIMIT
AUTO RESET HIGH LIMIT
12

13
PLC DISPLAY BEHIND
MAIN CONTROL BOX
COVER.
VFD DISPLAY NEW VERSION ATV320) VFD DISPLAY PREVIOUS VERSION ATV312)
TYPICAL START UP SCREENS DISPLAYED WHEN POWER SUPPLIED TO HEATER AND POWER
SELECTOR SWITCH IS PLACED TO EITHER THE 1PH OR 3PH POSITION.
(DEPENDING ON POWER SUPPLIED)
OR
PREPARATION FOR START UP
LIGHTING INSTRUCTIONS IHS700P (LPNG)
TO START HEATER
1) Ensure the gas supply line is securely attached to the heater. Maximum fuel supply pressure is
14” W.C. Minimum fuel supply pressure is 7” W.C. (natural gas) and 11” W.C. (propane).
2) The gas supply must be bled up to the heater to ensure a steady gas supply is present at the
heater.
3) Check the fuel conversion valve to ensure it is in the proper position. Refer to the label on the
heater for proper positioning.
4) Ensure correct electrical power is supplied to the corresponding inlet receptacle electrical
power supply. Refer to the heater rating plate for the required voltage.
5) Turn on the fuel and electrical supplies. Set the heater selector switch to manual or thermostat
and the heater should begin operation. The PLC control inside the main control panel will
display current sequence of operation.
6) If the heater does not start check for proper electrical and fuel supplies. Reset the burner
control by pressing red illuminated button on burner for 3 seconds and allow heater to repeat
the operation cycle.
TO STOP THE HEATER
1) Turn the heater selector switch to off. The supply fan will continue to run to cool down the heat
exchanger.
2) To prevent damage to the heat exchanger do not disconnect the power supply until the supply
fan stops.

14
MAINTENANCE AND SERVICE
WARNING Operation and adjustment of the burner requires technical knowledge and the use of
combustion test instruments. Do not tamper with the burner or controls. Failure to
comply could result in failure or the burner or system, resulting in severe personal injury,
death or substantial property damage.
Like all precision equipment, your burner will require periodic maintenance.
ANNUAL SERVICE
Have the burner inspected; tested and started at least annually by a qualified service technician. This
annual test/inspection should include at least the following:
oClean burner and blower wheel (to remove lint and debris).
oTest ignition and combustion and verify air damper settings.
oTest gas lines and all connections.
oInspect combustion air and vent systems.
oOil motor (if not permanently lubricated).
Additionally, you should have the burner checked as indicated below, by your local authorized dealer.
o Check burner distributor head and mixing plates. Clean if necessary.
o Check ignition electrode. Clean, adjust or replace as necessary.
o Check the flame sensor rod (ionization rod) for dirt or carbon build up. Clean, adjust, or
replace as necessary.
o Check manifold gas pressure.
o Check all burner adjustments.
o Generally clean all exposed parts and components.
o Repeat combustion tests.
EVERY 2 MONTHS
o If your furnace has an observation port, visually check the flame.
o Check and clean the air intake louver to remove any buildup of fluff, dust, pet hair, etc.
MONTHLY MAINTENANCE
o Observe combustion air openings and vent system for integrity. Openings must be clean
and free of obstructions.
o Check the fuel lines and fittings to verify there are no leaks.
o Observe burner ignition and performance to verify smooth operation.
o Shut the system down if you observe abnormal or questionable operation. Call a
qualified service agency for professional inspection and service.
o Grease the main supply blower bearings.

BEARING INSTALLATION AND MAINTENANCE
NOTE: To prevent premature failure –please ensure greasing instructions below are applied. As well,
tighten bearing set screws, collars, and wheel lugs every four to six months.
ENGINEERING – BALL & ROLLER BEARINGS LUBRICATION
For bearings that are equipped with a hydraulic grease fitting threaded into the housing for ease of
lubrication, the proper amount of lubricant in the bearing is important. Both excessive and inadequate
lubrication may cause failure. The bearings should be re-lubricated while they are rotating (if it is safe
to do so);; the grease should be pumped in slowly until a slight bead forms around the seals..The bead
in addition to acting as an indicator of adequate re-lubrication provides additional protection against the
entry of foreign matter and helps flush out contaminates in the bearing.
If necessary to re-lubricate while the bearing is idle, refer to the recommended re-lubrication grease
chart tables on the following page for various sizes of the bearings.
LUBRICANT- STANDARD BEARINGS
All bearing units are prelubricated at the factory This lubricant is satisfactory for an operating
temperature range of -40° to +250° F.
Select synthetic or standard industrial grade greases that conform to the following specification for
optimum bearing performance:
Premium Duty Ball & Roller;
58-75 SUS @ 210°F
50-750 SUS @ 100°F
NOTE: For heavy loaded roller bearing applications, grease with EP additives are often recommended for optimum performance.
15
Premium Duty Ball & Roller;
68-75 SUS @ 210°F
600-750 SUS @ 100°F
Premium Duty Ball & Roller;
82 SUS @ 210°F
886 SUS @ 100°F
TABLE I. RECOMMENDED LUBRICATION
Ball Bearings Roller Bearings
Shaft Size
(inches) Grease Charge (ounces) Shaft Size (inches) Grease Charge (ounces)
1–1 ½ 0.15 1 –½ to 1 –1 1/16 0.32
A high quality synthetic wide temperature range grease is recommended.
Under most circumstances the fan bearings of the IHS700P will be operating within the 1500-2800 RPM range and will
be at temperatures at or below 120°F - 130°F. Therefore typical lubrication frequency of the bearings will be every 2 to 5
months. In very dirty air environment the frequency of lubrication should increase.
The following chart gives the frequency of re-lubrication based upon continuous operation for various operating
temperatures and can be used as a satisfactory guide for determining when bearings should be re-lubricated.
T IIABLE . LUBRICATION FREQUENCY
Speed Temperature Cleanliness Greasing Interval
1500 -2800 RPM Up to 120° FClean 3-5 Months
Up to 130° FClean 2 Months
Up to 200° FClean 1 Month
Any speed Up to 150° FDirty 1 Month
Any speed Over 150° F1 - 2 weeks
Any speed Any temperature Weekly
Extreme conditions
1500 -2800 RPM
1500 -2800 RPM
Dirty

TENSIONING V-BELT DRIVES
1. Ideal tension is the lowest tension at which the belt will not slip under peak load conditions.
2. Check tension frequently during the first 24-48 hours of operation.
3. Over-tensioning shortens the belt and bearing life under-tensioning reduces belt life and will
decrease performance and waste energy.
4. Keep belts free from foreign material that may cause slip.
5. Make V-drive inspection on a periodic basis. Tension belts when slipping. Never apply belt
dressing as this will damage the belt and cause early failure.
Check and tighten belt tension. The following procedure is recommended for tightening belts:
a) Measure span “X”shown in Figure A.
b) At the center of span length “X”, apply a force perpendicular to the span and large enough to deflect
belt 1/64”for each inch of span length. Example- the required deflection for a 40”span would be
40/64”or 5/8”.
c) Compare the force applied with the values given in Table III. If force is between the minimum and
maximum range shown, the drive tension should be satisfactory. A force below the minimum value
indicates an under tightened belt and force that exceeds the maximum value indicates an over
tightened belt.
FIGUREA
FORCE
SPANLENGTH X
PERINCH OFSPAN
DEFLECTION1/64"
16
BELT
CROSS
SECTION
(Marked on Belt)
MOTOR PULLEY
PITCH
DIAMETER
DEFLECTION FORCE
MINIMUM MAXIMUM
B 4.4” – 5.6”4.0 lbs. 5.87 lbs.
TABLE III

NORMAL SEQUENCE OF OPERATION
1. Power is applied to the PLC control as soon as power is supplied with the main 1PH/3PH power selector switch. The
PLC display will read “FROST FIGHTER – IHS700P GAS - STANDBY MODE".
2. The PLC in the control panel controls power to terminal 1 on the burner from PLC output Q2 and also controls the
main blower fan operation through the VFD from PLC output Q3.
3. Placing the System Switch” to the MANUAL position or in the THERMOSTAT position with a thermostat connected
and calling for heat supplies power through the VFD relay contacts R1C & R1A and onto PLC input I1.
4. The PLC control will then supply from output Q2, through the limit switches and the low pressure gas switch to
terminal #1 on the burner control to commence operation beginning with starting the burner motor and a preset Pre-
Purge period before the burner control begins it's trial for ignition. This Pre-Purge sequence is displayed on the
burner control with an amber illumination on the burner control reset button and the PLC will display “BURNER
BLOWER PRE-PURGE” during this time. This Pre-Purge period will then be followed by a 4 second Trial for Ignition
period where the burner control will energize the ignition transformer and open the gas valves and will also illuminate
the green light on the exterior of the heater labeled "Burner On". The PLC control will display "BURNER STARTED -
BLOWER ON DELAY - ACTUAL TIME - SET TIME" during this 4 second Trial for Ignition sequence.
If the burner fails to fire during this 4 second Trial for Ignition period the burner control will lockout and solid red
illumination will appear in the burner control reset button. The PLC control will display "CHECK BURNER - RESET IF
LOCKOUT". This condition will remain until the burner control reset button is pressed for three seconds to clear the
lockout. The PLC control continue to display CHECK BURNER - RESET IF LOCKOUT" until it the burner control has
been reset and the PLC receives the next Burner On signal during the 4 second Trial for Ignition which once again
opens the gas valves, energizes the ignition transformer and illuminates the green light on the exterior of the heater,
at which point the PLC will once again read BURNER ON - BLOWER ON DELAY - ACTUAL TIME - SET TIME. If the
burner ignites then the PLC will continue to count down the blower delay or if the burner fails to ignite then the cycle
will be repeated again once the burner control is reset again.
If the burner control is not reset within approximately 1 minute & 15 seconds from each time it goes into lockout, the
optional beacon if attached will begin flashing red to indicate that the burner is in lockout and requires attention.
5. If the burner was successful at firing the reset button on the burner control will illuminate green and the PLC will
continue to count down the 30 second Blower On Delay until it has completed, at which point the PLC output contact
Q3 close and the VFD is initiated to start the main blower fan and the fan begins running.
6. The burner will continue firing until the call for heat is stopped either by a thermostat or by placing the System Switch
to OFF or a HIGH LIMIT ALARM has occurred and is displayed on the PLC screen. The PLC will begin the heat
exchanger Cool-down sequence when the call for heat has ended and will display “COOLDOWN - ACTUAL - SET”
until the blower stops and the PLC will then return to displaying “FROST FIGHTER - IHS700P GAS - STANDBY"
17
BURNER CONTROL PRE-PURGE
AMBER
BURNER CONTROL LOCKOUT
RED
BURNER CONTROL TRIAL
FOR IGNITION OR FIRING
GREEN

TYPICAL SEQUENCES OF OPERATION AND DISPLAYS
18
BURNER CONTROL
PRE-PURGE
AMBER
BURNER CONTROL FIRING
GREEN
BURNER CONTROL TRIAL
FOR IGNITION OR FIRING
GREEN
BURNER CONTROL OFF
NO LIGHT
The IHS700P has a low pressure gas switch (70058 ). item #4 on page 28.
If insufficient gas pressure is supplied to the IHS700P when the "system switch" is placed in the "manual" or
"Thermostat" position with a call for heat, the PLC will display "LOW GAS PRESSURE ALARM" and the optional
beacon if connected, will display red. There will be no power supplied to the gas burner control and the burner will
not operate.
If this condition occurs check to ensure the heater is being supplied with a minimum of 7" w.c. gas pressure. If the
pressure is adequate and the condition persists check the setting on the low pressure gas switch to ensure it is
correct. The correct setting is between 4.5 and 5. Also check that the switch functions properly and is not faulty.
NO POWER SUPPLIED TO
BURNER CONTROL WHEN
LOW PRESSURE GAS SWITCH
CONTACTS ARE OPEN.
LOW PRESSURE GAS SWITCH
BURNER CONTROL
TRIAL FOR IGNITION OR
FLASHING
AMBER