MWH 180 Tankless Water Heater
MWH 180 Series, Tankless Water Heaters from Monitor Products, Inc.
The most advanced, tankless, continuous water heaters available

The MWH 180 series tankless gas water heaters are 83% efficient. On demand tankless gas water heaters provide a continuous supply of hot water; only heating the water needed, cutting water heating costs up to 50%.

The compact design of the MWH 180 for interior installation tankless water heater allows for installation virtually anywhere.

• New advanced technology, supplying hot water continuously at published flow rates with a preset temperature of 120° F
• Includes main remote control, additional remote available for enhanced performance
• Crisp, modern design to blend in any decor
• Built in signal notifies the microprocessor to start the burner operation when the faucet is open and to stop when closed
• Gas is only consumed when water is heating
• Energy efficient electronic ignition system grants significant savings in energy and money
• Advanced control system uses sensors to maintain a constant outgoing water temperature
• For added safety the microprocessor limits the maximum temperature of the hot water to 120° when not using the remote control
• Service codes are displayed on a remote control speeding diagnostics during maintenance calls.
• Designed to prevent varying temperature of hot water when the faucet is cycled on and off, quick response mode
  for rapid heating
• Mounts easily to the wall requiring limited wall and no floor space
• Endless loop in input and output control ensures a stable flow of hot water
• Rich, lean design of the burner produces minimum nitrous oxides
• Potted control circuit board provides greater reliability of electronic components

• Performance
• Compare to Rinnai R75LSi
• Assessories
• Components

MWH 180 Interior Unit Performance Specifications
Model		Maximum	Minimum
Gas Consumption	Natural Gas	180,000 Btuh	20,000 Btuh
	LPG	180,000 Btuh	20,000 Btuh
Gas Supply Pressure	Natural Gas	10.5" w.c.	4" w.c.
	LPG	14" w.c.	8" w.c.
Manifold Gas Pressure	Natural Gas	2.4" w.c.	0.4" w.c.
	LPG	2.4" w.c.	0.4" w.c.
Hot Water Capacity		0.58-5.8 gpm
Max. Hot Water Capacity (54° F rise)		5.8 gpm
Approved gas type: Natural or Propane
Exhaust System: MWH 180 Direct Vent Forced Combustion
Dimensions: 24-1/32" H (610 mm) 3-25/32" W (350 mm) 8-38" D (210 mm) weight: 43 lb.
Installation: Interior only/wall hung
Connections: Gas: 3/4" MNPT, Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT
Ignition System: Direct Electronic Ignition
Temperature Range (with remote): Remote Controller: 96° F - 140° F
Type of Appliance: Gas continuous flow water heater
Electrical consumption: Normal: 61 watts , Standby: 3.7 watts, Anti-frost operation: 84 watts
Recommended Minimum Water Supply Pressure: 15 psi (recommended 25-75 psi for maximum performance)
Maximum water supply pressure: 150 psi

Compare Monitor MWH180 to RINNAI R75LSi
Components	Monitor MWH180	RINNAI R75LSi
Gas Input	20,000-180,000 Btu/h	15,000-180,000 Btu/h
Max. Hot Water Capacity	5.8 GPM ( 54° rise)	5.5 GPM (55° rise)
Temperature Setting	15PSI (Recommended 25-75 PSI)	20 PSI (Recommended 50 PSI or above)
Power Consumption	96 - 140°	98 - 140°
Noise Level	49dB	49dB
Size & Weight	24-1/32"H x 13-25/32"W x 8-3/8"D 43 lbs.	25" H x 14" W x 10" D 50 lbs.
Warranty	12 years (Heat exchanger) 1 year (Reasonable labor)	12 years (Heat exchanger) 1 year (Reasonable labor)

Accessories
Safety Devices	MWH 180 Series Remote Controller	MWH 180 Interior Unit Clearance from Combustibles
Appliance AC120V - 60Hz Remote control DC12V (digital)	CMR-2250 Supplied with Each Unit (Main control Kitchen/laundry) Part No. 3748	Top of heater 12"
		Front of heater 6"
		Sides of heater 2"
Flame failure - Flame rod		Back of heater 0"
Over heat switch 212° F	YST-2250 Optional (Bathroom control) Part No. 3749	Floor 12"
Over heat limit 203° F		Vent/air intake 0"
Thermal fuse 363° F
Automatic frost protection	Non-polarized two core cable
Combustion fan rpm check - PCB
Over current - fuse (5 amp)

Content 4

Stocked MWH 180 Components
PartNo.	Description	PartNo.	Description
11180	Tankless Water Heater LP MWHLP	3721LP	PCB Propane Gas
11180	Tankless Water Heater NG MWHNG	3721NG	PCB Natural Gas
3705	Gas Connection	3722LP	Manifold Assembly LP
3706	Gas Control Assembly	3722NG	Manifold Assembly NG
3707	Combustion Fan Motor Assembly	3724LP	Damper LP
3708	Transformer	3724NG	Damper NG
3711	Water Filter and Drain Flug	3725	Anti Frost Heater
3713	Water Flow Sensor	3728	Electrode Packing
3714	Surge Protector	3729	Electrode
3716	Water Flow Control Device	3730	Flame Rod
3717	Igniter	3732	Frost Sensing Switch
3718	Thermister	3734	Heat Exchanger Thermistor
3719	Over Heat Switch	3748	Main Remote Control
3720	Thermal Fuse Harness	3749	Bath Remote Control
3755	O-Ring P4 Fluorine	3806	Elbow 45 degree FFTEL45
3756	O-Ring P16 EPDM	3807	Elbow 90 degree FFTEL90
3757	O-Ring P15 EPDM	3808	Male-Male Adapter FFTMM
3758	O-Ring P4 EPDM	3809	Horizontal Drain Tee FFTDP
3759	O-Ring P12 EPDM	3810	Straight Termination 3.9-9.8" FFT-7U-200
3760	O-Ring P8	3811	Straight Termination 9.8-17.7" FFT-74-300
3761	O-Ring P24 NBR	3812	Straight Termination 17.1-25.6" FFT-7U-500
3762	PCB Fuse	3813	L Termination 3.9-9.8" FFT-7U(L)200
3763	Surge Protector Fuse	3814	L Termination 9.8-17.7" FFT-7U(L)-300
3801	Straight Pipe 11.8" FFTP300	3815	L Termination 17.7-25.6" FFT-7U(;L)500
3802	Straight Pipe 23.6" FFTP600	3816	Reducer FFTRD
3803	Straight Pipe 35.4" FFTP900	3819	Support Strap 2" Clearance FFTSTR
3804	Adjustable Pipe 6.9-9.1" FFTA200	9015	L50.12534 Flow Switch
3805	Adjustable Pipe 8.2-12.2" FFTA260