PH-25ROF N/P Residential Outdoor
Gas Tankless Water Heater

Digital main remote controller included (UMC-117) Auto recovery function Direct connect two-unit capability (requires DUOnex cable) 12 year/5 year/1 year warranty* Low NOx emissions Electronic spark ignition, no pilot 6 foot 120 vac power cord included Wall mount hardware included Freeze protected to -30°F Hydronic heating applications Optional remote controllers available Energy Factor of 0.82 Unique safety features: Paloma’s exclusive sensing burner and ICAD Safety System to optimize combustion and shut down the unit in case of raised levels of carbon monoxide (on all indoor and direct vent units only) Exclusive film wrap overheat limiter Flame failure safety device Anti-Scald protection Anti-Boil protection Freeze protection to -30°F

Manual (4.21MB, pdf) Brochure (2MB, pdf) Technical Specifications and Submittal Sheets

This line of tankless water heaters incorporates TWO unique safety features not found on others.

The FILM TYPE OVERHEAT LIMITER senses high temperature at all positions surrounding the combustion chamber. Other manufactures only sense at one point on the combustion chamber.

Three remote controls (one main control and two bath remote controls) can be installed together. One main remote control (UMC-117) comes with each unit.

WARRANTY*
12 Year warranty on heat exchanger
5 Year warranty on parts
1 Year warranty on service
*Effective on all water heaters purchased after 07-01-2008

Technical Specifications

SPECIFICATIONS - MODELS AND VENTING FOR ALL PH-25R MODELS
BTU Input Range	11,000 ~ 180,000 (fully modulating)
Maximum Hot Water Output	8.4 GPM (35° rise at 30 psi)
Minimum Flow for Ignition	0.66 GPM
Dimensions (inches)	Outdoor: 13 7/8 (w) x 23 5/8 (h) x 8 7/8 (d) Indoor DV: 13 7/8 (w) x 25 5/8 (h) x 9 7/8 (d)
Working Water Pressure	14 ~ 150 psi
Temperature Range	85 ~ 140°F
Gas Connection	3/4" NPT Femal (with included gas shutoff valve)
Water Connection	3/4" NPT Male
Efficiency Rating	82%
DOE Energy Factor	0.82
Gas Inlet Pressure (Indoor and Outdoor Models)	Natural Gas : Min 4.5" W.C.; Max 10.5" W.C. LP Gas: Min 10.0" W.C.; Max 14.0" W.C.
Gas Inlet Pressure (Direct Vent Model)	Natural Gas: Min 4.5"W.C.; Max 10.5"W.C. LP Gas: Min 10.0"W.C.; Max 14.0"W.C.
Low NOx Compliant (SCAQMD Rule 1146.2)	Yes (SCAQMD Rule 1146.2)
Electrical Requirement	120 V/60 Hz AC, 2 Amps
Power Cord (Except Outdoor)	6-foot. 3-pin indoor power cord (pre-installed)
Freeze Protection	(-30°F) (including windchill factor)
Controller/Diagnostic Display	UMC-117 (included)
Electric Manifold Ready?	Yes: 2 to 20 units (use MIC-180 controller)
DUOnex™ Ready?	Yes: 2 units with DUOnex™ Cable
Gas Shutoff Valve	Included
Vent Requirement (Indoor Direct Vent)	3/5" Category III stainless steel venting req.
Vent Maximum Length	23 feet (with three 90-degree elbows)
Net Weight	50 lbs.
SAFETY ENGINEERING
Carbon Monoxide Safety	ICAD™ - Proprietary system to monitor and optimize combustion (Not on Outdoor version)
Flame Failure	Three separate flame rods to monitor flame failure.
Anti-boil Protection	Temperature Sensor
Anti-scald Protection	- Bath controller maximum temp 120°F - When on, Bath Controller takes priority over others. - While hot water is running, Bath Controller max. temp. cannot be raised above 112°F.
FEATURES
Endless hot water on demand Energy-saving design: heats water only when needed Energy efficiency - 30% more efficient than tank-type water heaters High-Altitude Capability up to 9,840ft above sea level (no chip required) Compact, space-saving design Self-diagnostic program UMC-117 main digital remote control for convenience, comfort, and ease of maintenance Remote control displays adjustable temperature settings Intelligent electronic controls designed to increase energy efficiency and safety Direct Vent model uses 3/5" Concentric Category III stainless steel venting May be installed as part of a circulating water system Built-in electric blower on all models Low NOx emissions meet SCAQMD Rule 1121 requirements Double the performance with DUOnex™ System Extensive diagnostics and error display Supports both horizontal and vertical venting
WARRANTY*
12 year (Heat Exchanger) / 5 year (Parts) / 1 year (Service) *Effective on all water heaters purchased after 07-01-2008