OPERATING MANUAL
MHPH - 195/295/330/880
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Model _________________________ Serial #_____________________ Volts______________________
Phase __________________________ HP ______________________ Date Shipped ______________
SPECIFICATIONS
MHPH - 195 ....................................................................................................................................3
MHPH - 295 ....................................................................................................................................4
MHPH - 330 ....................................................................................................................................5
MHPH - 880 ....................................................................................................................................6
INTRODUCTION.................................................................................................................................7
INSTALLATION INSTRUCTIONS
GAS SUPPLY...................................................................................................................................8
VENTING REQUIREMENTS..........................................................................................................9
BASIC CONTROLS.........................................................................................................................10
OPERATING INSTRUCTIONS
PILOT IGNITION...........................................................................................................................10
BURNER OPERATION..................................................................................................................10
BURNER MAINTENANCE............................................................................................................10
GENERAL MAINTENANCE & CARE...........................................................................................11
TROUBLE SHOOTING GUIDE.............................................................................................................12-13
DIAGRAMS
ELECTRICAL WIRING DIAGRAM.............................................................................................14
TABLE OF CONTENTS
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SPECIFICATIONS
MHPH - 195
INSTANTANEOUS WATER HEATER.................................Propane or Nat. Gas Fired
HEATING COIL....................................................................98 Ft. Schedule 40
BURST PRESSURE...............................................................10,380 PSI
HYDROSTATIC TEST..........................................................4,000 PSI
WORKING PRESSURE.........................................................2,000 PSI
BURNER................................................................................Impinged Jet Type Atmospheric Draft
ORIFICE JETS.......................................................................Propane: No 68 Drill
Nat. Gas: No 55 Drill
IGNITION..............................................................................Standing Pilot
Standard Piezo Spark Pilot Igniter
INPUT.................................................................................... Propane: 195,000 BTU
Nat. Gas: 185,000 BTU
ALTITUDE RATING..............................................................0 To 4500 Ft. With No Orifice Change
MANIFOLD PRESSURE........................................................Propane: 11 In. W.C.
Nat. Gas: 3.5 In W.C.
TEMPERATURE RISE...........................................................100 F at 192 GPH
FLUE OUTLET.......................................................................7 In. Diameter
C O EMISSIONS.....................................................................Less than 50 PPM
AUTOMATIC GAS VALVE...................................................Combination Type: Millivolt Operated
HIGH LIMIT SWITCH............................................................Protects Against Overheating
Set at 210 F (Hot Water) or
340 F (Steam)
PRESSURE SWITCH..............................................................Prevents Burner Operation
Without Water Flow
TOGGLE SWITCH..................................................................Provides Manual “On-Off” Control
SAFETY RELIEF VALVE.......................................................Set at 2000 PSI
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SPECIFICATIONS
MHPH - 295
INSTANTANEOUS WATER HEATER.................................Propane or Nat. Gas Fired
HEATING COIL....................................................................165 Ft. Schedule 40
BURST PRESSURE...............................................................10,380 PSI
HYDROSTATIC TEST..........................................................4,400 PSI
WORKING PRESSURE.........................................................2,200 PSI
BURNER................................................................................Impinged Jet Type Atmospheric Draft
ORIFICE JETS.......................................................................Propane: No 67 Drill
Nat. Gas: No 54 Drill
IGNITION..............................................................................Standing Pilot
Standard Piezo Spark Pilot Igniter
INPUT.................................................................................... 290,000 BTU
ALTITUDE RATING..............................................................0 To 4500 Ft. With No Orifice Change
MANIFOLD PRESSURE.........................................................Propane: 11 In. W.C.
Nat. Gas: 3.4 In W.C.
TEMPERATURE RISE...........................................................100 F at 288 GPH
FLUE OUTLET.......................................................................9 In. Diameter
C O EMISSIONS.....................................................................85 ppm (.0085%)
AUTOMATIC GAS VALVE...................................................Combination Type: Millivolt Operated
HIGH LIMIT SWITCH............................................................Protects Against Overheating Set at
210 F (Hot Water) or 340 F (Steam)
PRESSURE SWITCH...............................................................Prevents Burner Operation
Without Water Flow
TOGGLE SWITCH..................................................................Provides Manual “On-Off” Control
SAFETY RELIEF VALVE.......................................................Set at 2200 PSI
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SPECIFICATIONS
MHPH - 330
INSTANTANEOUS WATER HEATER.................................Propane or Nat. Gas Fired
HEATING COIL....................................................................196 Ft. Schedule 80
BURST PRESSURE...............................................................14,000 PSI
HYDROSTATIC TEST..........................................................6,000 PSI
WORKING PRESSURE.........................................................3,000 PSI
BURNER................................................................................Impinged Jet Type Atmospheric Draft
ORIFICE JETS.......................................................................Propane: No 65 Drill
Nat. Gas No 53 Drill
IGNITION..............................................................................Standing Pilot
Standard Piezo Spark Pilot Igniter
INPUT.................................................................................... 330,000 BTU
ALTITUDE RATING..............................................................0 To 4500 Ft. With No Orifice Change
MANIFOLD PRESSURE.........................................................Propane: 11 In. W.C.
Nat. Gas: 3.5 In. W.C.
TEMPERATURE RISE..........................................................100 F at 345 GPH
FLUE OUTLET......................................................................9 In. Diameter
C O EMISSIONS....................................................................120 ppm (.012%)
AUTOMATIC GAS VALVE..................................................Combination Type: Millivolt Operated
HIGH LIMIT SWITCH...........................................................Protects Against Overheating Set at
210 F (Hot Water) or 340 F (Steam)
PRESSURE SWITCH.............................................................Prevents Burner Operation
Without Water Flow
TOGGLE SWITCH.................................................................Provides Manual “On-Off” Control
SAFETY RELIEF VALVE......................................................Set at 3000 PSI
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SPECIFICATIONS
MHPH - 880
INSTANTANEOUS WATER HEATER.................................Propane or Nat. Gas Fired
HEATING COIL....................................................................330 Ft x ¾ in. Schedule 80
BURST PRESSURE...............................................................14,057 PSI
HYDROSTATIC TEST..........................................................5,700 PSI
WORKING PRESSURE.........................................................3,500 PSI
BURNER................................................................................Impinged Jet Type Atmospheric Draft
ORIFICE JETS.......................................................................Propane: No 88 Drill
Nat. Gas No 52 Drill
IGNITION..............................................................................Standing Pilot
Standard Piezo Spark Pilot Igniter
INPUT.................................................................................... 880,000 BTU
ALTITUDE RATING..............................................................0 To 3000 Ft. With No Orifice Change
MANIFOLD PRESSURE.........................................................Propane: 11 In. W.C.
Nat. Gas: 3.5 In. W.C.
TEMPERATURE RISE..........................................................120 F at 600 GPH
FLUE OUTLET......................................................................12 In. Diameter
C O EMISSIONS....................................................................Less than400 ppm
AUTOMATIC GAS VALVE..................................................Combination Type: Millivolt Operated
HIGH LIMIT SWITCH...........................................................Protects Against Overheating Set at
215 F (Hot Water) or 350 F (Steam)
PRESSURE SWITCH.............................................................Prevents Burner Operation
Without Water Flow
TOGGLE SWITCH.................................................................Provides Manual “On-Off” Control
SAFETY RELIEF VALVE......................................................Set at 3500 PSI
STACK SIZE………………………………………………….12 inches
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EASY-KLEEN MODULAR WATER HEATERS
MODEL MHPH-195, MHPH-295, MHPH-330 and MHPH 880
INTRODUCTION
Thank you for selecting a quality EASY-KLEEN product. We are pleased to have you included among the many satisfied
owners of an EASY-KLEEN SYSTEM.
Years of engineering have gone into the development of these fine products and only top quality components and materials
are used throughout. Each machine is carefully tested and inspected before leaving our plant to ensure years of dependable
service.
The rest is up to you. To continue to receive satisfactory performance, remember that this machine represents a substantial
investment on your part, but properly cared for and maintained it will return this investment many times. As with all
mechanical equipment, your machine requires proper installation, proper operation and maintenance as outlined in this
manual.
PLEASE READ THIS MANUAL CAREFULLY BEFORE INSTALLING AND OPERATING MACHINE. EXAMINE
THE MACHINE AND CRATE CAREFULLY FOR SHIPPING DAMAGE OR MISSING PARTS. REPORT
PROMPTLY ANY SHORTAGES OR DAMAGE CLAIMS TO FREIGHT CARRIER.
Carefully review any additional manuals that have been included with your system and follow ALL ADDITIONAL
OPERATING INSTRUCTIONS. They are specific for the quality components that have been used to manufacture your
machine and are an integral part of the operating and maintenance procedures.
SCOPE
These instantaneous Coil-type Industrial Water Heaters are designed primarily for use in conjunction with existing cold
water washing systems, either as a field upgrade to a hot water washer or as integral component of a modular Hot Water
System. Note: These water heaters are restricted to industrial use
OPERATING CHARACTERISTICS
Maximum Working Pressure
The water heater coils are designed to operate safely at working pressures up to 2000 PSI (MHPH-195), 2200 PSI (MHPH-
295), 3000 PSI (MHPH-330) and 3500PSI (MHPH-880). Each water heater is equipped with a safety pressure relief valve
which prevents operation above this pressure. If the high pressure system requires a lower relieving pressure for pump and
motor protection, then the unloader/bypass valve on the pumping unit should be adjusted to the desired pressure rating.
HIGH LIMIT TEMPERATURE CONTROL
The water heater is equipped with a “high limit control” present at 210 F. To shut down the burner in the event of excessive
outlet temperature caused by insufficient water flow through the heater coil. This control can be adjusted to desired
temperature up to but not exceeding 210 F.
only and are not to be used as portable water heaters.
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PRESSURE SWITCH
A pressure switch is installed on the high pressure pump to prevent burner operation in the absence of water flow. When the
heater is used with shutoff gun pumping systems, the pressure switch controls the burner in conjunction with operation of the
trigger gun.
INSTALLATION INSTRUCTIONS
These water heaters are certified for installation on combustible flooring with clearance to combustible walls as follows: 6
inches at rear, 18 inches at end, 24 inches at front.
Installations must be performed in accordance with CAN1 B149.1 and 2 Codes requirements in Canada and/or prevailing
state and local codes is the USA.
GAS SUPPLY
NATURAL GAS
Run a minimum 1 inch IPS gas supply line to the heater reducing to 3/4 IPS at the inlet of the combination gas valve (Item
B). Install a gas shutoff cock in the supply line to provide for shutting off the gas for routine line maintenance or repairs.
The gas supply pipe shall be a direct line from the gas burning equipment in the building.
PROPANE
For stationary installations run a minimum 3/4 IPS supply line as above. For portable applications, a hose and regulator
assembly is included with the optional portability kit . This includes a P01 tank connector, single stage regulator and CGA
approved supply hose for connection to combination gas valve.
MHPH-195/295/330/880
Obtain one or more 100 lb. propane tank (s) and locate near the heater. Insert the male P01 connector on the regulator into
the female receptacle located on the propane tank shutoff valve and tighten firmly (L.H. thread). Open tank valve to the first
time, with soap solution. Before lighting pilot for the first time, turn gas cock knob on combination gas valve to “pilot”
position and depress for 3 minutes to purge air from supply hose. Release know and wait 5 minutes before lighting pilot in
the normal fashion.
Note: Continuous outdoor operation in freezing temperatures may require several tanks Mani folded together to maintain
consistent vaporization of the propane. Contact your local Lp gas distributor for multiple tank requirements and manifold
assembly.
INPUT RATING
Model MHPH-195 Propane: 195,000 BTU/hour Nat. Gas 185,000 BTU/hour
Model MHPH-295 Propane/Natural Gas: 290,000 BTU/hour
Model MHPH-330 Propane/Natural Gas: 330,000 BTU/hour
Model MHPH-880 Propane/Natural Gas: 880,000 BTU/hour
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REQUIRED GAS MANIFOLD PRESSURE
Natural Gas 3.5 in. WC at 1000 BTU per Cu. Ft.
Propane 11.0 in. WC at 2500 BTU per Cu. Ft.
Pressure tap located on automatic gas valve.
Certified for installation at 0 to 4500 Ft. altitude. Installations at over 4500 Ft. and up to 6000 Ft. require a 4% deration of
input rating, achieved by a slight reduction of gas pressure regulator setting.
VENTING REQUIREMENTS
STATIONARY INSTALLATIONS
The draft diverter must be attached to the flue hood outlet. Use same size vent as draft hood outlet and avoid short turns.
For horizontal runs are not recommended. Never use ventpipe smaller than the draft hood. If total run is more than 25’, use
larger size chimney. A 90 degree elbow is equilvalent to a run of 20 feet. OBSERVE CAN1 B49.1 and 2 installation Code
requirements. This machine is suitable for connection to type B venting when fitted with draft hood. Not suitable for
connection to type B gas vent if the stack temperature exceeds 243˚C (470˚F) IMPORTANT: All venting must be in
accordance with applicable federal and state laws, and local ordinances. Consult local heating contractors.
CAUTION; If the heater is left unused for extended periods during sub-zero weather, a column of freezing air will build up
in the venting system. If the building has a negative pressure condition, some of the freezing air will be drawn over the draft
hood, spilling onto the heating coil which will eventually cause it to rupture. Have installer ensure that correct draft
conditions are maintained to prevent this costly occurrence.
LOCATED IN CONFINED SPACE
The confined space should have 2 permanent openings: one near the top and one near the bottom of the enclosed area. The
openings need to be a minimum of one square inch per 1000 BTU’s of the total input rating of all units in the enclosed area.
The openings shall grant free access to the interior with sufficient passage from the outside
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage,
personal injury or loss of life. Do not tamper with factory installed controls.
PORTABLE PROPANE APPLICATIONS
An optional rain cap can be furnished to the flue outlet.
FREE AIR FOR COMBUSTION AND VENTING
If the unit is installed in an equipment room or other enclosure, care must be taken to supply sufficient free air for
combustion and ventilation. Observe CAN1 B49.1 and 2 Installation Code Requirements. Care should be taken to keep the
base of the unit clear of trash or any object that could interfere with combustion air to the burner. The installer will know
how and wher to place a supply air duct, ensuring that the opening will not promote drafts that may blow out the pilot. Keep
area around machine clear to ensure air can get to the burner. If no wheels the machine should be bolted to a stand 18” off
the floor.
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COMBUSTION AIR SUPPLY
Natural Gas or Propane is consumed. Therefore, air is required for combustion, for draft hood dilution and for ventilation
BASIC CONTROLS
The water heaters are equipped with automatic gas valves that have self-generating millivolt controls. No outside source of
electrical power is needed for operation. A temperature limit control protects the system against excessive outlet water
temperature. A pressure switch prevents burner operation without water flow. A burner “On-Off” switch is provided for
manual control.
OPERATING INSTRUCTIONS
TO LIGHT PILOT BURNER
Turn gas cock knob on combination gas valve to “pilot” position. Depress and hold knob while lighting pilot burner by
depressing Piezo Ignitor button until distinct click is heard. Repeat is pilot does not light on the first click. Continue
holding knob in position for 30 seconds or until pilot remains burning when released. Turn knob to “On” position in
readiness for controlled operation or main burner.
TO OPERATE MAIN BURNER
Be sure water is flowing through water heater coil before turning on burner switch. Start the pumping unit involved until a
steady stream of water is flowing from the spray gun.
Turn burner switch to “On” position. Burner will ignite and remain in operation as long as there is sufficient water flow to
satisfy the pressure switch and temperature limit control. To shut off main burner, turn burner switch to “Off”. For
complete shutdown of the water heater, turn knob on combination gas valve to “Off” position. Should pilot outage occur,
turn automatic gas valve to “Off”. Wait 5 MINUTES
CONDENSATION FROM COIL
When cold water is being pumped through the heater coil and the burner is firing, condensation may form at times on the
coil and drip down the burner compartment. This can be particularly noticeable on cold, humid days giving the false
appearance of a leaking coil.
TO CHECK HEATER COILS FOR LEAKS
Start the pumping unit and allow to run for a few minutes with the burner “Off”. Check the burner compartment with a
trouble light or flash light. If no leaks are visible, this will confirm that occasional water dripping from the coil is due to
condensation of the flue gases, when the burner is firing.
Due to periodic condensation dripping down onto the burner a scale build up may eventually occur in the burner jet orifices.
BURNER REMOVAL
Shut off the gas supply line to the water heater. Turn gas cock knob on combination gas valve to “Off” position. Remove
Boiler Assembly from frame. Disconnect the thermocouple and pilot line from the combination gas valve. Disconnect 3/4
pipe union in burner valve train. Remove the two burner retaining nuts.
before relighting to clear combustion chamber of accumulated gas.
BURNER MAINTENANCE
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TO CLEAN BURNER JETS
Select proper size drill for type of gas involved (see specifications, page 1-3). Use vise to hold drill and ream out each
orifice.
CAUTION
WINTERIZATION
If the water heater is likely to be exposed to freezing weather, than it should be winterized with anti-freeze or the coil
drained. Circulation of the anti-freeze solution through the coil by means of the pumping module is the most fail-safe
method.
WATER CONDITION
Use a softener on your water system if local water is known to be high is mineral content. The advantages of soft water are
very beneficial. Prevents scale buildup in heater coil, cleans better with considerably less detergent, prevents streaking on
painted surfaces and glass when rinsing.
DESCALING HEATER COIL
If heater coils develop excessive scale buildup they should be acidized to remove the scale. Excessive scale in heater coils
will reduce efficiency of the unit and affect recovery capacity.
DESCALING PROCEDURE
The best way to acidize the coil is with a circulation pump capable of handling acids:
1. Fill a plastic container with a suitable acid diluted with water to desired strength.
2. Connect the discharge from the circulating pump to the hot water outlet on the water heater with a
suitable hose. Connect the inlet of the circulating pump to the acid container with suction hose
from the pump module and use it as a return hose to the acid container. As the acid
dissolves the scale it becomes neutralized, so about every five minutes add more acid to the
container until all the scale has been removed from the coil. Flush out coil thoroughly with water
after descaling.
If no circulating pump is available, another good method can be used.
1. Remove high limit control and piping from the coil outlet. Install a standpipe on the outlet of the
coil as shown in diagram over leaf. Disconnect the water heater inlet hose (Item A) from the pump
module and run to a drain or suitable container.
2. Remove cap from standpipe and pour in about 1/2 gallon of acid diluted 50/50 with water. Screw
cap back on standpipe immediately. Caution:
procedure until coil is free of scale. Flush out coil thoroughly with water after cleaning.
Caution
: Do not ream out jet orifices to a larger size than specified.
GENERAL MAINTENANCE AND CARE
Do not stand directly over chamber. Repeat same
: Never allow acid to remain in coil for long periods of time.
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TROUBLE SHOOTING GUIDE - BURNER SYSTEM
_____________________________________________________________________________________
PROBLEM CAUSE REMEDY
_____________________________________________________________________________________
1. Pilot Does Not Light a. Gas leak in pilot tube. a. Check all Fittings with
soap solution.
b. Low service supply b. Ensure that gas supply
pressure. pressure to machine is at
least 3.5 In. WC for Nat.
Gas and 11 In. WC for
Propane. Check gas
supplier if not within range.
c. Insufficient gas flow to c. Adjust throttling screw on
Pilot. automatic gas valve until
pilot receives adequate gas
flow.
d. Very high draft or down d. Correct draft extremes.
draft.
_____________________________________________________________________________________
2. Pilot Ignites But a. Insufficient pilot flame. a. Increase pilot flame by
Will Not Stay On adjusting throttling screw
When Knob Is on automatic valve.
Released After Two b. Thermo coupler connection b. Tighten screw terminals.
Minutes Hold Down loose at automatic gas
valve.
c. Thermocouple may be c. Remove thermocouple and
defective check output voltage with
millivolt meter. Output
should be 750 MV on pilot
flame. If lower, check la,
lb,lc before installing new
thermocouple.
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TROUBLE SHOOTING GUIDE - BURNER SYSTEM
(Continued)
_____________________________________________________________________________________
PROBLEM CAUSE REMEDY
_____________________________________________________________________________________
3. Nuisance Pilot Outage a. Check items 1a, 1b, 1c,
1d, 2b, and 2c.
b. Inadequate gas supply b. If gas regulator has to be
pipe size to machine. adjusted to maximum pressure
to obtain desired water
temperature, this can result
in pilot gas pressure to dip
extremely low on burner
startup. Also excessive
pressure can surge through
on burner shutdown.
Check 1b at burner manifold
while firing.
4. Short Thermocouple a. Excessive heat to thermo- a. Decrease pilot supply gas.
Life couple from pilot.
_____________________________________________________________________________________
5. No Flame at Burner a. Manual valve on gas a. Open valve.
supply line closed.
b. Pilot is out. b. Light Pilot.
_____________________________________________________________________________________
6. Burner Fails to a. Check for loose a. Lighten electrical
Start electrical connections connections.
b. Pressure switch not b. Repair or replace flow
operating switch.
c. Limit control inoperative. c. Replace high limit control
d. Automatic valve inoperative d. Replace automatic gas
valve.
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Last updated September 19, 2012
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